From 77adf4cd648dce41f89469dd185deec6b6b53a0b Mon Sep 17 00:00:00 2001 From: Vikas Gorur Date: Wed, 18 Feb 2009 17:36:07 +0530 Subject: Added all files --- mod_glusterfs/Makefile.am | 3 + mod_glusterfs/apache/1.3/Makefile.am | 3 + mod_glusterfs/apache/1.3/src/Makefile.am | 30 + mod_glusterfs/apache/1.3/src/README.txt | 107 + mod_glusterfs/apache/1.3/src/mod_glusterfs.c | 514 ++++ mod_glusterfs/apache/2.2/Makefile.am | 3 + mod_glusterfs/apache/2.2/src/Makefile.am | 31 + mod_glusterfs/apache/2.2/src/README.txt | 105 + mod_glusterfs/apache/2.2/src/mod_glusterfs.c | 3536 ++++++++++++++++++++++++++ mod_glusterfs/apache/Makefile.am | 10 + mod_glusterfs/lighttpd/1.4/Makefile.am | 3 + mod_glusterfs/lighttpd/1.4/Makefile.am.diff | 29 + mod_glusterfs/lighttpd/1.4/README.txt | 57 + mod_glusterfs/lighttpd/1.4/mod_glusterfs.c | 1709 +++++++++++++ mod_glusterfs/lighttpd/1.4/mod_glusterfs.h | 29 + mod_glusterfs/lighttpd/1.5/Makefile.am | 3 + mod_glusterfs/lighttpd/1.5/Makefile.am.diff | 29 + mod_glusterfs/lighttpd/1.5/README.txt | 57 + mod_glusterfs/lighttpd/1.5/mod_glusterfs.c | 1476 +++++++++++ mod_glusterfs/lighttpd/1.5/mod_glusterfs.h | 29 + mod_glusterfs/lighttpd/Makefile.am | 3 + 21 files changed, 7766 insertions(+) create mode 100644 mod_glusterfs/Makefile.am create mode 100644 mod_glusterfs/apache/1.3/Makefile.am create mode 100644 mod_glusterfs/apache/1.3/src/Makefile.am create mode 100644 mod_glusterfs/apache/1.3/src/README.txt create mode 100644 mod_glusterfs/apache/1.3/src/mod_glusterfs.c create mode 100644 mod_glusterfs/apache/2.2/Makefile.am create mode 100644 mod_glusterfs/apache/2.2/src/Makefile.am create mode 100644 mod_glusterfs/apache/2.2/src/README.txt create mode 100644 mod_glusterfs/apache/2.2/src/mod_glusterfs.c create mode 100644 mod_glusterfs/apache/Makefile.am create mode 100644 mod_glusterfs/lighttpd/1.4/Makefile.am create mode 100644 mod_glusterfs/lighttpd/1.4/Makefile.am.diff create mode 100644 mod_glusterfs/lighttpd/1.4/README.txt create mode 100644 mod_glusterfs/lighttpd/1.4/mod_glusterfs.c create mode 100644 mod_glusterfs/lighttpd/1.4/mod_glusterfs.h create mode 100644 mod_glusterfs/lighttpd/1.5/Makefile.am create mode 100644 mod_glusterfs/lighttpd/1.5/Makefile.am.diff create mode 100644 mod_glusterfs/lighttpd/1.5/README.txt create mode 100644 mod_glusterfs/lighttpd/1.5/mod_glusterfs.c create mode 100644 mod_glusterfs/lighttpd/1.5/mod_glusterfs.h create mode 100644 mod_glusterfs/lighttpd/Makefile.am (limited to 'mod_glusterfs') diff --git a/mod_glusterfs/Makefile.am b/mod_glusterfs/Makefile.am new file mode 100644 index 00000000000..0abe8dcfcbb --- /dev/null +++ b/mod_glusterfs/Makefile.am @@ -0,0 +1,3 @@ +SUBDIRS = apache lighttpd + +CLEANFILES = diff --git a/mod_glusterfs/apache/1.3/Makefile.am b/mod_glusterfs/apache/1.3/Makefile.am new file mode 100644 index 00000000000..d471a3f9243 --- /dev/null +++ b/mod_glusterfs/apache/1.3/Makefile.am @@ -0,0 +1,3 @@ +SUBDIRS = src + +CLEANFILES = diff --git a/mod_glusterfs/apache/1.3/src/Makefile.am b/mod_glusterfs/apache/1.3/src/Makefile.am new file mode 100644 index 00000000000..6bb3075f564 --- /dev/null +++ b/mod_glusterfs/apache/1.3/src/Makefile.am @@ -0,0 +1,30 @@ +mod_glusterfs_PROGRAMS = mod_glusterfs.so +mod_glusterfsdir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/apache/1.3 + +mod_glusterfs_so_SOURCES = mod_glusterfs.c + +all: mod_glusterfs.so + +mod_glusterfs.so: $(top_srcdir)/mod_glusterfs/apache/1.3/src/mod_glusterfs.c $(top_builddir)/libglusterfsclient/src/libglusterfsclient.la + ln -sf $(top_srcdir)/mod_glusterfs/apache/1.3/src/mod_glusterfs.c $(top_builddir)/mod_glusterfs/apache/1.3/src/mod_glusterfs-build.c + $(APXS) -c -Wc,-g3 -Wc,-O0 -D_FILE_OFFSET_BITS=64 -D__USE_FILE_OFFSET64 -D_GNU_SOURCE -I$(top_srcdir)/libglusterfsclient/src -Wl,-rpath,$(libdir) -Wl,-rpath,$(top_builddir)/libglusterfsclient/src/.libs/ $(top_builddir)/libglusterfsclient/src/.libs/libglusterfsclient.so mod_glusterfs-build.c -o $(top_builddir)/mod_glusterfs/apache/1.3/src/mod_glusterfs.so + +$(top_builddir)/libglusterfsclient/src/libglusterfsclient.la: + $(MAKE) -C $(top_builddir)/libglusterfsclient/src/ all + +install-data-local: + @echo "" + @echo "" + @echo "**********************************************************************************" + @echo "* TO INSTALL MODGLUSTERFS, PLEASE USE, " + @echo "* $(APXS) -n glusterfs -ia $(mod_glusterfsdir)/mod_glusterfs.so " + @echo "**********************************************************************************" + @echo "" + @echo "" + +#install: +# cp -fv mod_glusterfs.so $(HTTPD_LIBEXECDIR) +# cp -fv httpd.conf $(HTTPD_CONF_DIR) + +clean: + -rm -fv *.so *.o mod_glusterfs-build.c diff --git a/mod_glusterfs/apache/1.3/src/README.txt b/mod_glusterfs/apache/1.3/src/README.txt new file mode 100644 index 00000000000..378a51d79ae --- /dev/null +++ b/mod_glusterfs/apache/1.3/src/README.txt @@ -0,0 +1,107 @@ +What is mod_glusterfs? +====================== +* mod_glusterfs is a module for apache written for efficient serving of files from glusterfs. + mod_glusterfs interfaces with glusterfs using apis provided by libglusterfsclient. + +* this README speaks about installation of apache-1.3.x, where x is any minor version. + +Prerequisites for mod_glusterfs +=============================== +Though mod_glusterfs has been written as a module, with an intent of making no changes to the way apache has +been built, currently following points have to be taken care of: + +* module "so" has to be enabled, for apache to support modules. +* since glusterfs is compiled with _FILE_OFFSET_BITS=64 and __USE_FILE_OFFSET64 flags, mod_glusterfs and apache + in turn have to be compiled with the above two flags. + + $ tar xzvf apache-1.3.9.tar.gz + $ cd apache-1.3.9/ + $ # add -D_FILE_OFFSET_BITS=64 -D__USE_FILE_OFFSET64 to EXTRA_CFLAGS in src/Configuration. + $ ./configure --prefix=/usr --enable-module=so + $ cd src + $ ./Configure + $ cd ../ + $ make install + $ httpd -l | grep -i mod_so + mod_so.c + +* if multiple apache installations are present, make sure to pass --with-apxs=/path/to/apxs/of/proper/version to configure script while building glusterfs. + +Build/Install mod_glusterfs +=========================== +* mod_glusterfs is provided with glusterfs--mainline--3.0 and all releases from the same branch. + +* building glusterfs also builds mod_glusterfs. But 'make install' of glusterfs installs mod_glusterfs.so to + glusterfs install directory instead of the apache modules directory. + +* 'make install' of glusterfs will print a message similar to the one given below, which is self explanatory. + Make sure to use apxs of proper apache version in case of multiple apache installations. This will copy + mod_glusterfs.so to modules directory of proper apache version and modify the appropriate httpd.conf to enable + mod_glusterfs. + +********************************************************************************************** +* TO INSTALL MODGLUSTERFS, PLEASE USE, +* apxs -n mod_glusterfs -ia /usr/lib/glusterfs/1.4.0pre2/apache-1.3/mod_glusterfs.so +********************************************************************************************** + +Configuration +============= +* Following configuration has to be added to httpd.conf. + + + GlusterfsLogfile "/var/log/glusterfs/glusterfs.log" + GlusterfsLoglevel "warning" + GlusterfsVolumeSpecfile "/etc/glusterfs/glusterfs-client.spec" + GlusterfsCacheTimeout "600" + GlusterfsXattrFileSize "65536" + SetHandler "glusterfs-handler" + + +* GlusterfsVolumeSpecfile (COMPULSORY) + Path to the the glusterfs volume specification file. + +* GlusterfsLogfile (COMPULSORY) + Path to the glusterfs logfile. + +* GlusterfsLoglevel (OPTIONAL, default = warning) + Severity of messages that are to be logged. Allowed values are critical, error, warning, debug, none + in the decreasing order of severity. + +* GlusterfsCacheTimeOut (OPTIONAL, default = 0) + Timeout values for glusterfs stat and lookup cache. + +* GlusterfsXattrFileSize (OPTIONAL, default = 0) + Files with sizes upto and including this value are fetched through the extended attribute interface of + glusterfs rather than the usual open-read-close set of operations. For files of small sizes, it is recommended + to use extended attribute interface. + +* With the above configuration all the requests to httpd of the form www.example.org/glusterfs/path/to/file are + served from glusterfs. + +Miscellaneous points +==================== +* httpd by default runs with username "nobody" and group "nogroup". Permissions of logfile and specfile have to + be set suitably. + +* Since mod_glusterfs runs with permissions of nobody.nogroup, glusterfs has to use only login based + authentication. See docs/authentication.txt for more details. + +* To copy the data served by httpd into glusterfs mountpoint, glusterfs can be started with the + volume-specification file provided to mod_glusterfs. Any tool like cp can then be used. + +* To run in gdb, apache has to be compiled with -lpthread, since libglusterfsclient is multithreaded. + If not on Linux gdb runs into errors like: + "Error while reading shared library symbols: + Cannot find new threads: generic error" + +* when used with ib-verbs transport, ib_verbs initialization fails. + reason for this is that apache runs as non-privileged user and the amount of memory that can be + locked by default is not sufficient for ib-verbs. to fix this, as root run, + + # ulimit -l unlimited + + and then start apache. + +TODO +==== +* directory listing for the directories accessed through mod_glusterfs. diff --git a/mod_glusterfs/apache/1.3/src/mod_glusterfs.c b/mod_glusterfs/apache/1.3/src/mod_glusterfs.c new file mode 100644 index 00000000000..e13d7762679 --- /dev/null +++ b/mod_glusterfs/apache/1.3/src/mod_glusterfs.c @@ -0,0 +1,514 @@ +/* + Copyright (c) 2008 Z RESEARCH, Inc. + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + . +*/ + +#ifndef CORE_PRIVATE +#define CORE_PRIVATE +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define GLUSTERFS_INVALID_LOGLEVEL "mod_glusterfs: Unrecognized log-level \"%s\", possible values are \"DEBUG|WARNING|ERROR|CRITICAL|NONE\"\n" + +#define GLUSTERFS_HANDLER "glusterfs-handler" +#define GLUSTERFS_CHUNK_SIZE 131072 + +module MODULE_VAR_EXPORT glusterfs_module; + +/*TODO: verify error returns to server core */ + +typedef struct glusterfs_dir_config { + char *logfile; + char *loglevel; + char *specfile; + char *mount_dir; + char *buf; + size_t xattr_file_size; + uint32_t cache_timeout; + libglusterfs_handle_t handle; +} glusterfs_dir_config_t; + +typedef struct glusterfs_async_local { + int op_ret; + int op_errno; + char async_read_complete; + off_t length; + off_t read_bytes; + glusterfs_read_buf_t *buf; + request_rec *request; + pthread_mutex_t lock; + pthread_cond_t cond; +}glusterfs_async_local_t; + +#define GLUSTERFS_CMD_PERMS ACCESS_CONF + +static glusterfs_dir_config_t * +mod_glusterfs_dconfig(request_rec *r) +{ + glusterfs_dir_config_t *dir_config = NULL; + if (r->per_dir_config != NULL) { + dir_config = ap_get_module_config (r->per_dir_config, &glusterfs_module); + } + + return dir_config; +} + +static +const char *add_xattr_file_size(cmd_parms *cmd, void *dummy, char *arg) +{ + glusterfs_dir_config_t *dir_config = dummy; + dir_config->xattr_file_size = atoi (arg); + return NULL; +} + +static +const char *set_cache_timeout(cmd_parms *cmd, void *dummy, char *arg) +{ + glusterfs_dir_config_t *dir_config = dummy; + dir_config->cache_timeout = atoi (arg); + return NULL; +} + +static +const char *set_loglevel(cmd_parms *cmd, void *dummy, char *arg) +{ + glusterfs_dir_config_t *dir_config = dummy; + char *error = NULL; + if (strncasecmp (arg, "DEBUG", strlen ("DEBUG")) + && strncasecmp (arg, "WARNING", strlen ("WARNING")) + && strncasecmp (arg, "CRITICAL", strlen ("CRITICAL")) + && strncasecmp (arg, "NONE", strlen ("NONE")) + && strncasecmp (arg, "ERROR", strlen ("ERROR"))) + error = GLUSTERFS_INVALID_LOGLEVEL; + else + dir_config->loglevel = arg; + + return error; +} + +static +const char *add_logfile(cmd_parms *cmd, void *dummy, char *arg) +{ + glusterfs_dir_config_t *dir_config = dummy; + dir_config->logfile = arg; + + return NULL; +} + +static +const char *add_specfile(cmd_parms *cmd, void *dummy, char *arg) +{ + glusterfs_dir_config_t *dir_config = dummy; + + dir_config->specfile = arg; + + return NULL; +} + +static void * +mod_glusterfs_create_dir_config(pool *p, char *dirspec) +{ + glusterfs_dir_config_t *dir_config = NULL; + + dir_config = (glusterfs_dir_config_t *) ap_pcalloc(p, sizeof(*dir_config)); + + dir_config->mount_dir = dirspec; + dir_config->logfile = dir_config->specfile = (char *)0; + dir_config->loglevel = "warning"; + dir_config->handle = (libglusterfs_handle_t) 0; + dir_config->cache_timeout = 0; + dir_config->buf = NULL; + + return (void *) dir_config; +} + +static void +mod_glusterfs_child_init(server_rec *s, pool *p) +{ + void **urls = NULL; + int n, i; + core_server_config *mod_core_config = ap_get_module_config (s->module_config, + &core_module); + glusterfs_dir_config_t *dir_config = NULL; + glusterfs_init_ctx_t ctx; + + n = mod_core_config->sec_url->nelts; + urls = (void **)mod_core_config->sec_url->elts; + for (i = 0; i < n; i++) { + dir_config = ap_get_module_config (urls[i], &glusterfs_module); + + if (dir_config) { + memset (&ctx, 0, sizeof (ctx)); + + ctx.logfile = dir_config->logfile; + ctx.loglevel = dir_config->loglevel; + ctx.lookup_timeout = ctx.stat_timeout = dir_config->cache_timeout; + ctx.specfile = dir_config->specfile; + + dir_config->handle = glusterfs_init (&ctx); + } + dir_config = NULL; + } +} + +static void +mod_glusterfs_child_exit(server_rec *s, pool *p) +{ + void **urls = NULL; + int n, i; + core_server_config *mod_core_config = ap_get_module_config (s->module_config, + &core_module); + glusterfs_dir_config_t *dir_config = NULL; + + n = mod_core_config->sec_url->nelts; + urls = (void **)mod_core_config->sec_url->elts; + for (i = 0; i < n; i++) { + dir_config = ap_get_module_config (urls[i], &glusterfs_module); + if (dir_config && dir_config->handle) { + glusterfs_fini (dir_config->handle); + dir_config->handle = 0; + } + dir_config = NULL; + } +} + +static int mod_glusterfs_fixup(request_rec *r) +{ + glusterfs_dir_config_t *dir_config = NULL; + int access_status; + int ret; + char *path = NULL; + + dir_config = mod_glusterfs_dconfig(r); + + if (dir_config && dir_config->mount_dir && !(strncmp (ap_pstrcat (r->pool, dir_config->mount_dir, "/", NULL), r->uri, strlen (dir_config->mount_dir) + 1) && !r->handler)) + r->handler = ap_pstrdup (r->pool, GLUSTERFS_HANDLER); + + if (!r->handler || (r->handler && strcmp (r->handler, GLUSTERFS_HANDLER))) + return DECLINED; + + if (dir_config->mount_dir) + path = r->uri + strlen (dir_config->mount_dir); + + memset (&r->finfo, 0, sizeof (r->finfo)); + + dir_config->buf = calloc (1, dir_config->xattr_file_size); + if (!dir_config->buf) { + return HTTP_INTERNAL_SERVER_ERROR; + } + + ret = glusterfs_lookup (dir_config->handle, path, dir_config->buf, + dir_config->xattr_file_size, &r->finfo); + + if (ret == -1 || r->finfo.st_size > dir_config->xattr_file_size || S_ISDIR (r->finfo.st_mode)) { + free (dir_config->buf); + dir_config->buf = NULL; + + if (ret == -1) { + int error = HTTP_NOT_FOUND; + char *emsg = NULL; + if (r->path_info == NULL) { + emsg = ap_pstrcat(r->pool, strerror (errno), r->filename, NULL); + } + else { + emsg = ap_pstrcat(r->pool, strerror (errno), r->filename, r->path_info, NULL); + } + ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, r, "%s", emsg); + if (errno != ENOENT) { + error = HTTP_INTERNAL_SERVER_ERROR; + } + return error; + } + } + + if (r->uri && strlen (r->uri) && r->uri[strlen(r->uri) - 1] == '/') + r->handler = NULL; + + r->filename = ap_pstrcat (r->pool, r->filename, r->path_info, NULL); + + if ((access_status = ap_find_types(r)) != 0) { + return DECLINED; + } + + return OK; +} + + +int +mod_glusterfs_readv_async_cbk (glusterfs_read_buf_t *buf, + void *cbk_data) +{ + glusterfs_async_local_t *local = cbk_data; + + pthread_mutex_lock (&local->lock); + { + local->async_read_complete = 1; + local->buf = buf; + pthread_cond_signal (&local->cond); + } + pthread_mutex_unlock (&local->lock); + + return 0; +} + +/* use read_async just to avoid memcpy of read buffer in libglusterfsclient */ +static int +mod_glusterfs_read_async (request_rec *r, int fd, off_t offset, off_t length) +{ + glusterfs_async_local_t local; + off_t end; + int nbytes; + int complete; + pthread_cond_init (&local.cond, NULL); + pthread_mutex_init (&local.lock, NULL); + + memset (&local, 0, sizeof (local)); + local.request = r; + + if (length > 0) + end = offset + length; + + do { + glusterfs_read_buf_t *buf; + int i; + if (length > 0) { + nbytes = end - offset; + if (nbytes > GLUSTERFS_CHUNK_SIZE) + nbytes = GLUSTERFS_CHUNK_SIZE; + } else + nbytes = GLUSTERFS_CHUNK_SIZE; + + glusterfs_read_async(fd, + nbytes, + offset, + mod_glusterfs_readv_async_cbk, + (void *)&local); + + pthread_mutex_lock (&local.lock); + { + while (!local.async_read_complete) { + pthread_cond_wait (&local.cond, &local.lock); + } + + local.op_ret = local.buf->op_ret; + local.op_errno = local.buf->op_errno; + + local.async_read_complete = 0; + buf = local.buf; + + if (length < 0) + complete = (local.buf->op_ret <= 0); + else { + local.read_bytes += local.buf->op_ret; + complete = ((local.read_bytes == length) || (local.buf->op_ret < 0)); + } + } + pthread_mutex_unlock (&local.lock); + + for (i = 0; i < buf->count; i++) { + if (ap_rwrite (buf->vector[i].iov_base, buf->vector[i].iov_len, r) < 0) { + local.op_ret = -1; + complete = 1; + break; + } + } + + glusterfs_free (buf); + + offset += nbytes; + } while (!complete); + + return (local.op_ret < 0 ? SERVER_ERROR : OK); +} + +/* TODO: to read blocks of size "length" from offset "offset" */ +/* + static int + mod_glusterfs_read_sync (request_rec *r, int fd, off_t offset, off_t length) + { + int error = OK; + off_t read_bytes; + char buf [GLUSTERFS_CHUNK_SIZE]; + + while ((read_bytes = glusterfs_read (fd, buf, GLUSTERFS_CHUNK_SIZE)) && read_bytes != -1) { + ap_rwrite (buf, read_bytes, r); + } + if (read_bytes) { + error = SERVER_ERROR; + } + return error; + } +*/ + +static int +mod_glusterfs_handler(request_rec *r) +{ + glusterfs_dir_config_t *dir_config; + char *path = NULL; + int error = OK; + int rangestatus = 0; + int errstatus = OK; + int fd; + + if (!r->handler || (r->handler && strcmp (r->handler, GLUSTERFS_HANDLER))) + return DECLINED; + + if (r->uri[0] == '\0' || r->uri[strlen(r->uri) - 1] == '/') { + return DECLINED; + } + + dir_config = mod_glusterfs_dconfig (r); + + if (r->method_number != M_GET) { + return METHOD_NOT_ALLOWED; + } + + if (!dir_config->handle) { + ap_log_rerror (APLOG_MARK, APLOG_ERR, r, + "glusterfs initialization failed\n"); + return FORBIDDEN; + } + + ap_update_mtime(r, r->finfo.st_mtime); + ap_set_last_modified(r); + ap_set_etag(r); + ap_table_setn(r->headers_out, "Accept-Ranges", "bytes"); + if (((errstatus = ap_meets_conditions(r)) != OK) + || (errstatus = ap_set_content_length(r, r->finfo.st_size))) { + return errstatus; + } + rangestatus = ap_set_byterange(r); + ap_send_http_header(r); + + if (r->finfo.st_size <= dir_config->xattr_file_size && dir_config->buf) { + if (!r->header_only) { + error = OK; + ap_log_rerror (APLOG_MARK, APLOG_NOTICE, r, + "fetching data from glusterfs through xattr interface\n"); + + if (!rangestatus) { + if (ap_rwrite (dir_config->buf, r->finfo.st_size, r) < 0) { + error = HTTP_INTERNAL_SERVER_ERROR; + } + } else { + long offset, length; + while (ap_each_byterange (r, &offset, &length)) { + if (ap_rwrite (dir_config->buf + offset, length, r) < 0) { + error = HTTP_INTERNAL_SERVER_ERROR; + break; + } + } + } + } + + free (dir_config->buf); + dir_config->buf = NULL; + + return error; + } + + path = r->uri + strlen (dir_config->mount_dir); + fd = glusterfs_open (dir_config->handle, path , O_RDONLY, 0); + + if (fd == 0) { + ap_log_rerror(APLOG_MARK, APLOG_ERR, r, + "file permissions deny server access: %s", r->filename); + return FORBIDDEN; + } + + if (!r->header_only) { + if (!rangestatus) { + mod_glusterfs_read_async (r, fd, 0, -1); + } else { + long offset, length; + while (ap_each_byterange(r, &offset, &length)) { + mod_glusterfs_read_async (r, fd, offset, length); + } + } + } + + glusterfs_close (fd); + return error; +} + +static const command_rec mod_glusterfs_cmds[] = +{ + {"GlusterfsLogfile", add_logfile, NULL, + GLUSTERFS_CMD_PERMS, TAKE1, + "Glusterfs Logfile"}, + {"GlusterfsLoglevel", set_loglevel, NULL, + GLUSTERFS_CMD_PERMS, TAKE1, + "Glusterfs Loglevel:anyone of none, critical, error, warning, debug"}, + {"GlusterfsCacheTimeout", set_cache_timeout, NULL, + GLUSTERFS_CMD_PERMS, TAKE1, + "Timeout value in seconds for caching lookups and stats"}, + {"GlusterfsVolumeSpecfile", add_specfile, NULL, + GLUSTERFS_CMD_PERMS, TAKE1, + "Glusterfs Specfile required to access contents of this directory"}, + {"GlusterfsXattrFileSize", add_xattr_file_size, NULL, + GLUSTERFS_CMD_PERMS, TAKE1, + "Maximum size of the file to be fetched using xattr interface of glusterfs"}, + {NULL} +}; + +static const handler_rec mod_glusterfs_handlers[] = +{ + {GLUSTERFS_HANDLER, mod_glusterfs_handler}, + {NULL} +}; + +module glusterfs_module = +{ + STANDARD_MODULE_STUFF, + NULL, + mod_glusterfs_create_dir_config, /* per-directory config creator */ + NULL, + NULL, /* server config creator */ + NULL, /* server config merger */ + mod_glusterfs_cmds, /* command table */ + mod_glusterfs_handlers, /* [7] list of handlers */ + NULL, /* [2] filename-to-URI translation */ + NULL, /* [5] check/validate user_id */ + NULL, /* [6] check user_id is valid *here* */ + NULL, /* [4] check access by host address */ + NULL, /* [7] MIME type checker/setter */ + mod_glusterfs_fixup, /* [8] fixups */ + NULL, /* [10] logger */ +#if MODULE_MAGIC_NUMBER >= 19970103 + NULL, /* [3] header parser */ +#endif +#if MODULE_MAGIC_NUMBER >= 19970719 + mod_glusterfs_child_init, /* process initializer */ +#endif +#if MODULE_MAGIC_NUMBER >= 19970728 + mod_glusterfs_child_exit, /* process exit/cleanup */ +#endif +#if MODULE_MAGIC_NUMBER >= 19970902 + NULL /* [1] post read_request handling */ +#endif +}; diff --git a/mod_glusterfs/apache/2.2/Makefile.am b/mod_glusterfs/apache/2.2/Makefile.am new file mode 100644 index 00000000000..d471a3f9243 --- /dev/null +++ b/mod_glusterfs/apache/2.2/Makefile.am @@ -0,0 +1,3 @@ +SUBDIRS = src + +CLEANFILES = diff --git a/mod_glusterfs/apache/2.2/src/Makefile.am b/mod_glusterfs/apache/2.2/src/Makefile.am new file mode 100644 index 00000000000..1e8f3a31ea0 --- /dev/null +++ b/mod_glusterfs/apache/2.2/src/Makefile.am @@ -0,0 +1,31 @@ +mod_glusterfs_PROGRAMS = mod_glusterfs.so +mod_glusterfsdir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/apache/2.2 + +mod_glusterfs_so_SOURCES = mod_glusterfs.c + +all: mod_glusterfs.so + +mod_glusterfs.so: $(top_srcdir)/mod_glusterfs/apache/2.2/src/mod_glusterfs.c $(top_builddir)/libglusterfsclient/src/libglusterfsclient.la + ln -sf $(top_srcdir)/mod_glusterfs/apache/2.2/src/mod_glusterfs.c $(top_builddir)/mod_glusterfs/apache/2.2/src/mod_glusterfs-build.c + $(APXS) -c -o mod_glusterfs.la -Wc,-g3 -Wc,-O0 -DLINUX=2 -D_REENTRANT -D_GNU_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D__USE_FILE_OFFSET64 -I$(top_srcdir)/libglusterfsclient/src -L$(top_builddir)/libglusterfsclient/src/.libs/ -lglusterfsclient mod_glusterfs-build.c + -ln -sf .libs/mod_glusterfs.so mod_glusterfs.so + +$(top_builddir)/libglusterfsclient/src/libglusterfsclient.la: + $(MAKE) -C $(top_builddir)/libglusterfsclient/src/ all + +install-data-local: + @echo "" + @echo "" + @echo "**********************************************************************************" + @echo "* TO INSTALL MODGLUSTERFS, PLEASE USE, " + @echo "* $(APXS) -n glusterfs -ia $(mod_glusterfsdir)/mod_glusterfs.so " + @echo "**********************************************************************************" + @echo "" + @echo "" + +#install: +# cp -fv mod_glusterfs.so $(HTTPD_LIBEXECDIR) +# cp -fv httpd.conf $(HTTPD_CONF_DIR) + +clean: + rm -fv *.so *.o diff --git a/mod_glusterfs/apache/2.2/src/README.txt b/mod_glusterfs/apache/2.2/src/README.txt new file mode 100644 index 00000000000..00298454219 --- /dev/null +++ b/mod_glusterfs/apache/2.2/src/README.txt @@ -0,0 +1,105 @@ +What is mod_glusterfs? +====================== +* mod_glusterfs is a module for apache written for efficient serving of files from glusterfs. + mod_glusterfs interfaces with glusterfs using apis provided by libglusterfsclient. + +* this README speaks about installing mod_glusterfs for httpd-2.2 and higher. + +Prerequisites for mod_glusterfs +=============================== +Though mod_glusterfs has been written as a module, with an intent of making no changes to +the way apache has been built, currently following points have to be taken care of: + +* since glusterfs is compiled with _FILE_OFFSET_BITS=64 and __USE_FILE_OFFSET64 flags, mod_glusterfs and apache + in turn have to be compiled with the above two flags. + + $ tar xzf httpd-2.2.10.tar.gz + $ cd httpd-2.2.10/ + $ export CFLAGS='-D_FILE_OFFSET_BITS=64 -D__USE_FILE_OFFSET64' + $ ./configure --prefix=/usr + $ make + $ make install + $ httpd -l | grep -i mod_so + mod_so.c + +* if multiple apache installations are present, make sure to pass --with-apxs=/path/to/apxs/of/proper/version + to configure script while building glusterfs. + +Build/Install mod_glusterfs +=========================== +* mod_glusterfs is provided with glusterfs--mainline--3.0 and all releases from the same branch. + +* building glusterfs also builds mod_glusterfs. But 'make install' of glusterfs installs mod_glusterfs.so to + glusterfs install directory instead of the apache modules directory. + +* 'make install' of glusterfs will print a message similar to the one given below, which is self explanatory. + Make sure to use apxs of proper apache version in case of multiple apache installations. This will copy + mod_glusterfs.so to modules directory of proper apache version and modify the appropriate httpd.conf to enable + mod_glusterfs. + +********************************************************************************** +* TO INSTALL MODGLUSTERFS, PLEASE USE, +* apxs -n glusterfs -ia /usr/lib/glusterfs/1.4.0tla872/apache/2.2/mod_glusterfs.so +********************************************************************************** + +Configuration +============= +* Following configuration has to be added to httpd.conf. + + + GlusterfsLogfile "/var/log/glusterfs/glusterfs.log" + GlusterfsLoglevel "warning" + GlusterfsVolumeSpecfile "/etc/glusterfs/glusterfs-client.spec" + GlusterfsCacheTimeout "600" + GlusterfsXattrFileSize "65536" + SetHandler "glusterfs-handler" + + +* GlusterfsVolumeSpecfile (COMPULSORY) + Path to the the glusterfs volume specification file. + +* GlusterfsLogfile (COMPULSORY) + Path to the glusterfs logfile. + +* GlusterfsLoglevel (OPTIONAL, default = warning) + Severity of messages that are to be logged. Allowed values are critical, error, warning, debug, none + in the decreasing order of severity. + +* GlusterfsCacheTimeOut (OPTIONAL, default = 0) + Timeout values for glusterfs stat and lookup cache. + +* GlusterfsXattrFileSize (OPTIONAL, default = 0) + Files with sizes upto and including this value are fetched through the extended attribute interface of + glusterfs rather than the usual open-read-close set of operations. For files of small sizes, it is recommended + to use extended attribute interface. + +* With the above configuration all the requests to httpd of the form www.example.org/glusterfs/path/to/file are + served from glusterfs. + +* mod_glusterfs also implements mod_dir and mod_autoindex behaviour for files under glusterfs mount. + Hence it also takes the directives related to both of these modules. For more details, refer the + documentation for both of these modules. + +Miscellaneous points +==================== +* httpd by default runs with username "nobody" and group "nogroup". Permissions of logfile and specfile have to + be set suitably. + +* Since mod_glusterfs runs with permissions of nobody.nogroup, glusterfs has to use only login based + authentication. See docs/authentication.txt for more details. + +* To copy the data served by httpd into glusterfs mountpoint, glusterfs can be started with the + volume-specification file provided to mod_glusterfs. Any tool like cp can then be used. + +* To run in gdb, apache has to be compiled with -lpthread, since libglusterfsclient is + multithreaded. If not on Linux gdb runs into errors like: + "Error while reading shared library symbols: + Cannot find new threads: generic error" + +* when used with ib-verbs transport, ib_verbs initialization fails. + reason for this is that apache runs as non-privileged user and the amount of memory that can be + locked by default is not sufficient for ib-verbs. to fix this, as root run, + + # ulimit -l unlimited + + and then start apache. diff --git a/mod_glusterfs/apache/2.2/src/mod_glusterfs.c b/mod_glusterfs/apache/2.2/src/mod_glusterfs.c new file mode 100644 index 00000000000..dff05817805 --- /dev/null +++ b/mod_glusterfs/apache/2.2/src/mod_glusterfs.c @@ -0,0 +1,3536 @@ +/* + Copyright (c) 2008 Z RESEARCH, Inc. + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + . +*/ + +#ifndef CORE_PRIVATE +#define CORE_PRIVATE +#endif + +#ifndef NO_CONTENT_TYPE +#define NO_CONTENT_TYPE "none" +#endif + +#define BYTERANGE_FMT "%" APR_OFF_T_FMT "-%" APR_OFF_T_FMT "/%" APR_OFF_T_FMT + +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define GLUSTERFS_INVALID_LOGLEVEL "mod_glfs: Unrecognized log-level \"%s\", possible values are \"DEBUG|WARNING|ERROR|CRITICAL|NONE\"\n" + +#define GLUSTERFS_HANDLER "glusterfs-handler" +#define GLUSTERFS_CHUNK_SIZE 131072 + +static char c_by_encoding, c_by_type, c_by_path; + +#define BY_ENCODING &c_by_encoding +#define BY_TYPE &c_by_type +#define BY_PATH &c_by_path + +module AP_MODULE_DECLARE_DATA glusterfs_module; +extern module core_module; + +#define NO_OPTIONS (1 << 0) /* Indexing options */ +#define ICONS_ARE_LINKS (1 << 1) +#define SCAN_HTML_TITLES (1 << 2) +#define SUPPRESS_ICON (1 << 3) +#define SUPPRESS_LAST_MOD (1 << 4) +#define SUPPRESS_SIZE (1 << 5) +#define SUPPRESS_DESC (1 << 6) +#define SUPPRESS_PREAMBLE (1 << 7) +#define SUPPRESS_COLSORT (1 << 8) +#define SUPPRESS_RULES (1 << 9) +#define FOLDERS_FIRST (1 << 10) +#define VERSION_SORT (1 << 11) +#define TRACK_MODIFIED (1 << 12) +#define FANCY_INDEXING (1 << 13) +#define TABLE_INDEXING (1 << 14) +#define IGNORE_CLIENT (1 << 15) +#define IGNORE_CASE (1 << 16) +#define EMIT_XHTML (1 << 17) +#define SHOW_FORBIDDEN (1 << 18) + +#define K_NOADJUST 0 +#define K_ADJUST 1 +#define K_UNSET 2 + +/* + * Define keys for sorting. + */ +#define K_NAME 'N' /* Sort by file name (default) */ +#define K_LAST_MOD 'M' /* Last modification date */ +#define K_SIZE 'S' /* Size (absolute, not as displayed) */ +#define K_DESC 'D' /* Description */ +#define K_VALID "NMSD" /* String containing _all_ valid K_ opts */ + +#define D_ASCENDING 'A' +#define D_DESCENDING 'D' +#define D_VALID "AD" /* String containing _all_ valid D_ opts */ + +/* + * These are the dimensions of the default icons supplied with Apache. + */ +#define DEFAULT_ICON_WIDTH 20 +#define DEFAULT_ICON_HEIGHT 22 + +/* + * Other default dimensions. + */ +#define DEFAULT_NAME_WIDTH 23 +#define DEFAULT_DESC_WIDTH 23 + +struct mod_glfs_ai_item { + char *type; + char *apply_to; + char *apply_path; + char *data; +}; + +typedef struct mod_glfs_ai_desc_t { + char *pattern; + char *description; + int full_path; + int wildcards; +} mod_glfs_ai_desc_t; + +typedef enum { + SLASH_OFF = 0, + SLASH_ON, + SLASH_UNSET +} mod_glfs_dir_slash_cfg; + +/* static ap_filter_rec_t *mod_glfs_output_filter_handle; */ + +/*TODO: verify error returns to server core */ + +typedef struct glusterfs_dir_config { + char *logfile; + char *loglevel; + char *specfile; + char *mount_dir; + char *buf; + size_t xattr_file_size; + uint32_t cache_timeout; + libglusterfs_handle_t handle; + + /* mod_dir options */ + apr_array_header_t *index_names; + mod_glfs_dir_slash_cfg do_slash; + + /* autoindex options */ + char *default_icon; + char *style_sheet; + apr_int32_t opts; + apr_int32_t incremented_opts; + apr_int32_t decremented_opts; + int name_width; + int name_adjust; + int desc_width; + int desc_adjust; + int icon_width; + int icon_height; + char default_keyid; + char default_direction; + + apr_array_header_t *icon_list; + apr_array_header_t *alt_list; + apr_array_header_t *desc_list; + apr_array_header_t *ign_list; + apr_array_header_t *hdr_list; + apr_array_header_t *rdme_list; + + char *ctype; + char *charset; +} glusterfs_dir_config_t; + +typedef struct glusterfs_async_local { + int op_ret; + int op_errno; + char async_read_complete; + off_t length; + off_t read_bytes; + glusterfs_read_buf_t *buf; + request_rec *request; + pthread_mutex_t lock; + pthread_cond_t cond; +}glusterfs_async_local_t; + +#define GLUSTERFS_CMD_PERMS ACCESS_CONF + + +static glusterfs_dir_config_t * +mod_glfs_dconfig (request_rec *r) +{ + glusterfs_dir_config_t *dir_config = NULL; + if (r->per_dir_config != NULL) { + dir_config = ap_get_module_config (r->per_dir_config, &glusterfs_module); + } + + return dir_config; +} + + +static const char * +cmd_add_xattr_file_size (cmd_parms *cmd, void *dummy, const char *arg) +{ + glusterfs_dir_config_t *dir_config = dummy; + dir_config->xattr_file_size = atoi (arg); + return NULL; +} + + +static const char * +cmd_set_cache_timeout (cmd_parms *cmd, void *dummy, const char *arg) +{ + glusterfs_dir_config_t *dir_config = dummy; + dir_config->cache_timeout = atoi (arg); + return NULL; +} + + +static const char * +cmd_set_loglevel (cmd_parms *cmd, void *dummy, const char *arg) +{ + glusterfs_dir_config_t *dir_config = dummy; + char *error = NULL; + if (strncasecmp (arg, "DEBUG", strlen ("DEBUG")) + && strncasecmp (arg, "WARNING", strlen ("WARNING")) + && strncasecmp (arg, "CRITICAL", strlen ("CRITICAL")) + && strncasecmp (arg, "NONE", strlen ("NONE")) + && strncasecmp (arg, "ERROR", strlen ("ERROR"))) + error = GLUSTERFS_INVALID_LOGLEVEL; + else + dir_config->loglevel = apr_pstrdup (cmd->pool, arg); + + return error; +} + +static const char * +cmd_add_logfile (cmd_parms *cmd, void *dummy, const char *arg) +{ + glusterfs_dir_config_t *dir_config = dummy; + dir_config->logfile = apr_pstrdup (cmd->pool, arg); + + return NULL; +} + + +static const char * +cmd_add_volume_specfile (cmd_parms *cmd, void *dummy, const char *arg) +{ + glusterfs_dir_config_t *dir_config = dummy; + + dir_config->specfile = apr_pstrdup (cmd->pool, arg); + + return NULL; +} + +#define WILDCARDS_REQUIRED 0 + +static const char * +cmd_add_desc (cmd_parms *cmd, void *d, const char *desc, + const char *to) +{ + glusterfs_dir_config_t *dcfg = (glusterfs_dir_config_t *) d; + mod_glfs_ai_desc_t *desc_entry; + char *prefix = ""; + + desc_entry = (mod_glfs_ai_desc_t *) apr_array_push(dcfg->desc_list); + desc_entry->full_path = (ap_strchr_c(to, '/') == NULL) ? 0 : 1; + desc_entry->wildcards = (WILDCARDS_REQUIRED + || desc_entry->full_path + || apr_fnmatch_test(to)); + if (desc_entry->wildcards) { + prefix = desc_entry->full_path ? "*/" : "*"; + desc_entry->pattern = apr_pstrcat(dcfg->desc_list->pool, + prefix, to, "*", NULL); + } + else { + desc_entry->pattern = apr_pstrdup(dcfg->desc_list->pool, to); + } + desc_entry->description = apr_pstrdup(dcfg->desc_list->pool, desc); + return NULL; +} + + +static void push_item(apr_array_header_t *arr, char *type, const char *to, + const char *path, const char *data) +{ + struct mod_glfs_ai_item *p = (struct mod_glfs_ai_item *) apr_array_push(arr); + + if (!to) { + to = ""; + } + if (!path) { + path = ""; + } + + p->type = type; + p->data = data ? apr_pstrdup(arr->pool, data) : NULL; + p->apply_path = apr_pstrcat(arr->pool, path, "*", NULL); + + if ((type == BY_PATH) && (!ap_is_matchexp(to))) { + p->apply_to = apr_pstrcat(arr->pool, "*", to, NULL); + } + else if (to) { + p->apply_to = apr_pstrdup(arr->pool, to); + } + else { + p->apply_to = NULL; + } +} + + +static const char * +cmd_add_ignore (cmd_parms *cmd, void *d, const char *ext) +{ + push_item(((glusterfs_dir_config_t *) d)->ign_list, 0, ext, cmd->path, NULL); + return NULL; +} + + +static const char * +cmd_add_header (cmd_parms *cmd, void *d, const char *name) +{ + push_item(((glusterfs_dir_config_t *) d)->hdr_list, 0, NULL, cmd->path, + name); + return NULL; +} + + +static const char * +cmd_add_readme (cmd_parms *cmd, void *d, const char *name) +{ + push_item(((glusterfs_dir_config_t *) d)->rdme_list, 0, NULL, cmd->path, + name); + return NULL; +} + + +static const char * +cmd_add_opts (cmd_parms *cmd, void *d, int argc, char *const argv[]) +{ + int i; + char *w; + apr_int32_t opts; + apr_int32_t opts_add; + apr_int32_t opts_remove; + char action; + glusterfs_dir_config_t *d_cfg = (glusterfs_dir_config_t *) d; + + opts = d_cfg->opts; + opts_add = d_cfg->incremented_opts; + opts_remove = d_cfg->decremented_opts; + + for (i = 0; i < argc; i++) { + int option = 0; + w = argv[i]; + + if ((*w == '+') || (*w == '-')) { + action = *(w++); + } + else { + action = '\0'; + } + if (!strcasecmp(w, "FancyIndexing")) { + option = FANCY_INDEXING; + } + else if (!strcasecmp(w, "FoldersFirst")) { + option = FOLDERS_FIRST; + } + else if (!strcasecmp(w, "HTMLTable")) { + option = TABLE_INDEXING; + } + else if (!strcasecmp(w, "IconsAreLinks")) { + option = ICONS_ARE_LINKS; + } + else if (!strcasecmp(w, "IgnoreCase")) { + option = IGNORE_CASE; + } + else if (!strcasecmp(w, "IgnoreClient")) { + option = IGNORE_CLIENT; + } + else if (!strcasecmp(w, "ScanHTMLTitles")) { + option = SCAN_HTML_TITLES; + } + else if (!strcasecmp(w, "SuppressColumnSorting")) { + option = SUPPRESS_COLSORT; + } + else if (!strcasecmp(w, "SuppressDescription")) { + option = SUPPRESS_DESC; + } + else if (!strcasecmp(w, "SuppressHTMLPreamble")) { + option = SUPPRESS_PREAMBLE; + } + else if (!strcasecmp(w, "SuppressIcon")) { + option = SUPPRESS_ICON; + } + else if (!strcasecmp(w, "SuppressLastModified")) { + option = SUPPRESS_LAST_MOD; + } + else if (!strcasecmp(w, "SuppressSize")) { + option = SUPPRESS_SIZE; + } + else if (!strcasecmp(w, "SuppressRules")) { + option = SUPPRESS_RULES; + } + else if (!strcasecmp(w, "TrackModified")) { + option = TRACK_MODIFIED; + } + else if (!strcasecmp(w, "VersionSort")) { + option = VERSION_SORT; + } + else if (!strcasecmp(w, "XHTML")) { + option = EMIT_XHTML; + } + else if (!strcasecmp(w, "ShowForbidden")) { + option = SHOW_FORBIDDEN; + } + else if (!strcasecmp(w, "None")) { + if (action != '\0') { + return "Cannot combine '+' or '-' with 'None' keyword"; + } + opts = NO_OPTIONS; + opts_add = 0; + opts_remove = 0; + } + else if (!strcasecmp(w, "IconWidth")) { + if (action != '-') { + d_cfg->icon_width = DEFAULT_ICON_WIDTH; + } + else { + d_cfg->icon_width = 0; + } + } + else if (!strncasecmp(w, "IconWidth=", 10)) { + if (action == '-') { + return "Cannot combine '-' with IconWidth=n"; + } + d_cfg->icon_width = atoi(&w[10]); + } + else if (!strcasecmp(w, "IconHeight")) { + if (action != '-') { + d_cfg->icon_height = DEFAULT_ICON_HEIGHT; + } + else { + d_cfg->icon_height = 0; + } + } + else if (!strncasecmp(w, "IconHeight=", 11)) { + if (action == '-') { + return "Cannot combine '-' with IconHeight=n"; + } + d_cfg->icon_height = atoi(&w[11]); + } + else if (!strcasecmp(w, "NameWidth")) { + if (action != '-') { + return "NameWidth with no value may only appear as " + "'-NameWidth'"; + } + d_cfg->name_width = DEFAULT_NAME_WIDTH; + d_cfg->name_adjust = K_NOADJUST; + } + else if (!strncasecmp(w, "NameWidth=", 10)) { + if (action == '-') { + return "Cannot combine '-' with NameWidth=n"; + } + if (w[10] == '*') { + d_cfg->name_adjust = K_ADJUST; + } + else { + int width = atoi(&w[10]); + + if (width && (width < 5)) { + return "NameWidth value must be greater than 5"; + } + d_cfg->name_width = width; + d_cfg->name_adjust = K_NOADJUST; + } + } + else if (!strcasecmp(w, "DescriptionWidth")) { + if (action != '-') { + return "DescriptionWidth with no value may only appear as " + "'-DescriptionWidth'"; + } + d_cfg->desc_width = DEFAULT_DESC_WIDTH; + d_cfg->desc_adjust = K_NOADJUST; + } + else if (!strncasecmp(w, "DescriptionWidth=", 17)) { + if (action == '-') { + return "Cannot combine '-' with DescriptionWidth=n"; + } + if (w[17] == '*') { + d_cfg->desc_adjust = K_ADJUST; + } + else { + int width = atoi(&w[17]); + + if (width && (width < 12)) { + return "DescriptionWidth value must be greater than 12"; + } + d_cfg->desc_width = width; + d_cfg->desc_adjust = K_NOADJUST; + } + } + else if (!strncasecmp(w, "Type=", 5)) { + d_cfg->ctype = apr_pstrdup(cmd->pool, &w[5]); + } + else if (!strncasecmp(w, "Charset=", 8)) { + d_cfg->charset = apr_pstrdup(cmd->pool, &w[8]); + } + else { + return "Invalid directory indexing option"; + } + if (action == '\0') { + opts |= option; + opts_add = 0; + opts_remove = 0; + } + else if (action == '+') { + opts_add |= option; + opts_remove &= ~option; + } + else { + opts_remove |= option; + opts_add &= ~option; + } + } + if ((opts & NO_OPTIONS) && (opts & ~NO_OPTIONS)) { + return "Cannot combine other IndexOptions keywords with 'None'"; + } + d_cfg->incremented_opts = opts_add; + d_cfg->decremented_opts = opts_remove; + d_cfg->opts = opts; + return NULL; +} + + +static const char * +cmd_set_default_order(cmd_parms *cmd, void *m, + const char *direction, const char *key) +{ + glusterfs_dir_config_t *d_cfg = (glusterfs_dir_config_t *) m; + + if (!strcasecmp(direction, "Ascending")) { + d_cfg->default_direction = D_ASCENDING; + } + else if (!strcasecmp(direction, "Descending")) { + d_cfg->default_direction = D_DESCENDING; + } + else { + return "First keyword must be 'Ascending' or 'Descending'"; + } + + if (!strcasecmp(key, "Name")) { + d_cfg->default_keyid = K_NAME; + } + else if (!strcasecmp(key, "Date")) { + d_cfg->default_keyid = K_LAST_MOD; + } + else if (!strcasecmp(key, "Size")) { + d_cfg->default_keyid = K_SIZE; + } + else if (!strcasecmp(key, "Description")) { + d_cfg->default_keyid = K_DESC; + } + else { + return "Second keyword must be 'Name', 'Date', 'Size', or " + "'Description'"; + } + + return NULL; +} + + +static char c_by_encoding, c_by_type, c_by_path; + +#define BY_ENCODING &c_by_encoding +#define BY_TYPE &c_by_type +#define BY_PATH &c_by_path + +/* + * This routine puts the standard HTML header at the top of the index page. + * We include the DOCTYPE because we may be using features therefrom (i.e., + * HEIGHT and WIDTH attributes on the icons if we're FancyIndexing). + */ +static void emit_preamble(request_rec *r, int xhtml, const char *title) +{ + glusterfs_dir_config_t *d; + + d = (glusterfs_dir_config_t *) ap_get_module_config(r->per_dir_config, + &glusterfs_module); + + if (xhtml) { + ap_rvputs(r, DOCTYPE_XHTML_1_0T, + "\n" + " \n Index of ", title, + "\n", NULL); + } else { + ap_rvputs(r, DOCTYPE_HTML_3_2, + "\n \n" + " Index of ", title, + "\n", NULL); + } + + if (d->style_sheet != NULL) { + ap_rvputs(r, " style_sheet, + "\" type=\"text/css\"", xhtml ? " />\n" : ">\n", NULL); + } + ap_rvputs(r, " \n \n", NULL); +} + + +static const char *cmd_add_alt(cmd_parms *cmd, void *d, const char *alt, + const char *to) +{ + if (cmd->info == BY_PATH) { + if (!strcmp(to, "**DIRECTORY**")) { + to = "^^DIRECTORY^^"; + } + } + if (cmd->info == BY_ENCODING) { + char *tmp = apr_pstrdup(cmd->pool, to); + ap_str_tolower(tmp); + to = tmp; + } + + push_item(((glusterfs_dir_config_t *) d)->alt_list, cmd->info, to, + cmd->path, alt); + return NULL; +} + +static const char *cmd_add_icon(cmd_parms *cmd, void *d, const char *icon, + const char *to) +{ + char *iconbak = apr_pstrdup(cmd->pool, icon); + + if (icon[0] == '(') { + char *alt; + char *cl = strchr(iconbak, ')'); + + if (cl == NULL) { + return "missing closing paren"; + } + alt = ap_getword_nc(cmd->pool, &iconbak, ','); + *cl = '\0'; /* Lose closing paren */ + cmd_add_alt(cmd, d, &alt[1], to); + } + if (cmd->info == BY_PATH) { + if (!strcmp(to, "**DIRECTORY**")) { + to = "^^DIRECTORY^^"; + } + } + if (cmd->info == BY_ENCODING) { + char *tmp = apr_pstrdup(cmd->pool, to); + ap_str_tolower(tmp); + to = tmp; + } + + push_item(((glusterfs_dir_config_t *) d)->icon_list, cmd->info, to, + cmd->path, iconbak); + return NULL; +} + + +static void * +mod_glfs_create_dir_config(apr_pool_t *p, char *dirspec) +{ + glusterfs_dir_config_t *dir_config = NULL; + + dir_config = (glusterfs_dir_config_t *) apr_pcalloc(p, sizeof(*dir_config)); + + dir_config->mount_dir = dirspec; + dir_config->logfile = dir_config->specfile = (char *)0; + dir_config->loglevel = "warning"; + dir_config->handle = (libglusterfs_handle_t) 0; + dir_config->cache_timeout = 0; + dir_config->buf = NULL; + + /* mod_dir options init */ + dir_config->index_names = NULL; + dir_config->do_slash = SLASH_UNSET; + + /* autoindex options init */ + dir_config->icon_width = 0; + dir_config->icon_height = 0; + dir_config->name_width = DEFAULT_NAME_WIDTH; + dir_config->name_adjust = K_UNSET; + dir_config->desc_width = DEFAULT_DESC_WIDTH; + dir_config->desc_adjust = K_UNSET; + dir_config->icon_list = apr_array_make(p, 4, sizeof(struct mod_glfs_ai_item)); + dir_config->alt_list = apr_array_make(p, 4, sizeof(struct mod_glfs_ai_item)); + dir_config->desc_list = apr_array_make(p, 4, sizeof(mod_glfs_ai_desc_t)); + dir_config->ign_list = apr_array_make(p, 4, sizeof(struct mod_glfs_ai_item)); + dir_config->hdr_list = apr_array_make(p, 4, sizeof(struct mod_glfs_ai_item)); + dir_config->rdme_list = apr_array_make(p, 4, sizeof(struct mod_glfs_ai_item)); + dir_config->opts = 0; + dir_config->incremented_opts = 0; + dir_config->decremented_opts = 0; + dir_config->default_keyid = '\0'; + dir_config->default_direction = '\0'; + + return (void *) dir_config; +} + + +static void * +mod_glfs_merge_dir_config(apr_pool_t *p, void *parent_conf, + void *newloc_conf) +{ + glusterfs_dir_config_t *new = (glusterfs_dir_config_t *) + apr_pcalloc(p, sizeof(glusterfs_dir_config_t)); + glusterfs_dir_config_t *add = newloc_conf; + glusterfs_dir_config_t *base = parent_conf; + + if (add->logfile) + new->logfile = apr_pstrdup (p, add->logfile); + + if (add->loglevel) + new->loglevel = apr_pstrdup (p, add->loglevel); + + if (add->specfile) + new->specfile = apr_pstrdup (p, add->specfile); + + if (add->mount_dir) + new->mount_dir = apr_pstrdup (p, add->mount_dir); + + new->xattr_file_size = add->xattr_file_size; + new->cache_timeout = add->cache_timeout; + new->handle = add->handle; + new->buf = add->buf; + + /* mod_dir */ + new->index_names = add->index_names ? add->index_names : base->index_names; + new->do_slash = + (add->do_slash == SLASH_UNSET) ? base->do_slash : add->do_slash; + + /* auto index */ + new->default_icon = add->default_icon ? add->default_icon + : base->default_icon; + new->style_sheet = add->style_sheet ? add->style_sheet + : base->style_sheet; + new->icon_height = add->icon_height ? add->icon_height : base->icon_height; + new->icon_width = add->icon_width ? add->icon_width : base->icon_width; + + new->ctype = add->ctype ? add->ctype : base->ctype; + new->charset = add->charset ? add->charset : base->charset; + + new->alt_list = apr_array_append(p, add->alt_list, base->alt_list); + new->ign_list = apr_array_append(p, add->ign_list, base->ign_list); + new->hdr_list = apr_array_append(p, add->hdr_list, base->hdr_list); + new->desc_list = apr_array_append(p, add->desc_list, base->desc_list); + new->icon_list = apr_array_append(p, add->icon_list, base->icon_list); + new->rdme_list = apr_array_append(p, add->rdme_list, base->rdme_list); + if (add->opts & NO_OPTIONS) { + /* + * If the current directory says 'no options' then we also + * clear any incremental mods from being inheritable further down. + */ + new->opts = NO_OPTIONS; + new->incremented_opts = 0; + new->decremented_opts = 0; + } + else { + /* + * If there were any nonincremental options selected for + * this directory, they dominate and we don't inherit *anything.* + * Contrariwise, we *do* inherit if the only settings here are + * incremental ones. + */ + if (add->opts == 0) { + new->incremented_opts = (base->incremented_opts + | add->incremented_opts) + & ~add->decremented_opts; + new->decremented_opts = (base->decremented_opts + | add->decremented_opts); + /* + * We may have incremental settings, so make sure we don't + * inadvertently inherit an IndexOptions None from above. + */ + new->opts = (base->opts & ~NO_OPTIONS); + } + else { + /* + * There are local nonincremental settings, which clear + * all inheritance from above. They *are* the new base settings. + */ + new->opts = add->opts;; + } + /* + * We're guaranteed that there'll be no overlap between + * the add-options and the remove-options. + */ + new->opts |= new->incremented_opts; + new->opts &= ~new->decremented_opts; + } + /* + * Inherit the NameWidth settings if there aren't any specific to + * the new location; otherwise we'll end up using the defaults set in the + * config-rec creation routine. + */ + if (add->name_adjust == K_UNSET) { + new->name_width = base->name_width; + new->name_adjust = base->name_adjust; + } + else { + new->name_width = add->name_width; + new->name_adjust = add->name_adjust; + } + + /* + * Likewise for DescriptionWidth. + */ + if (add->desc_adjust == K_UNSET) { + new->desc_width = base->desc_width; + new->desc_adjust = base->desc_adjust; + } + else { + new->desc_width = add->desc_width; + new->desc_adjust = add->desc_adjust; + } + + new->default_keyid = add->default_keyid ? add->default_keyid + : base->default_keyid; + new->default_direction = add->default_direction ? add->default_direction + : base->default_direction; + + return (void *) new; +} + + +static void +mod_glfs_child_init(apr_pool_t *p, server_rec *s) +{ + int i; + core_server_config *sconf = NULL; + ap_conf_vector_t **sec_ent = NULL; + glusterfs_dir_config_t *dir_config = NULL; + glusterfs_init_ctx_t ctx; + int num_sec = 0; + + sconf = (core_server_config *) ap_get_module_config (s->module_config, &core_module); + sec_ent = (ap_conf_vector_t **) sconf->sec_url->elts; + num_sec = sconf->sec_url->nelts; + + for (i = 0; i < num_sec; i++) { + dir_config = ap_get_module_config (sec_ent[i], &glusterfs_module); + + if (dir_config) { + memset (&ctx, 0, sizeof (ctx)); + + ctx.logfile = dir_config->logfile; + ctx.loglevel = dir_config->loglevel; + ctx.lookup_timeout = ctx.stat_timeout = dir_config->cache_timeout; + ctx.specfile = dir_config->specfile; + + dir_config->handle = glusterfs_init (&ctx); + if (!dir_config->handle) { + ap_log_error(APLOG_MARK, APLOG_ERR, APR_EGENERAL, s, + "mod_glfs_child_init: glusterfs_init failed, check glusterfs logfile %s for more details", + dir_config->logfile); + } + } + dir_config = NULL; + } +} + + +static void +mod_glfs_child_exit(server_rec *s, apr_pool_t *p) +{ + int i; + core_server_config *sconf = ap_get_module_config(s->module_config, + &core_module); + ap_conf_vector_t **sec_ent = (ap_conf_vector_t **) sconf->sec_url->elts; + glusterfs_dir_config_t *dir_config = NULL; + glusterfs_init_ctx_t ctx; + int num_sec = sconf->sec_url->nelts; + + for (i = 0; i < num_sec; i++) { + dir_config = ap_get_module_config (sec_ent[i], &glusterfs_module); + if (dir_config && dir_config->handle) { + glusterfs_fini (dir_config->handle); + dir_config->handle = 0; + } + dir_config = NULL; + } +} + + +static apr_filetype_e filetype_from_mode(mode_t mode) +{ + apr_filetype_e type = APR_NOFILE; + + if (S_ISREG(mode)) + type = APR_REG; + else if (S_ISDIR(mode)) + type = APR_DIR; + else if (S_ISCHR(mode)) + type = APR_CHR; + else if (S_ISBLK(mode)) + type = APR_BLK; + else if (S_ISFIFO(mode)) + type = APR_PIPE; + else if (S_ISLNK(mode)) + type = APR_LNK; + else if (S_ISSOCK(mode)) + type = APR_SOCK; + else + type = APR_UNKFILE; + return type; +} + + +static void fill_out_finfo(apr_finfo_t *finfo, struct stat *info, + apr_int32_t wanted) +{ + finfo->valid = APR_FINFO_MIN | APR_FINFO_IDENT | APR_FINFO_NLINK + | APR_FINFO_OWNER | APR_FINFO_PROT; + finfo->protection = apr_unix_mode2perms(info->st_mode); + finfo->filetype = filetype_from_mode(info->st_mode); + finfo->user = info->st_uid; + finfo->group = info->st_gid; + finfo->size = info->st_size; + finfo->device = info->st_dev; + finfo->nlink = info->st_nlink; + + /* Check for overflow if storing a 64-bit st_ino in a 32-bit + * apr_ino_t for LFS builds: */ + if (sizeof(apr_ino_t) >= sizeof(info->st_ino) + || (apr_ino_t)info->st_ino == info->st_ino) { + finfo->inode = info->st_ino; + } else { + finfo->valid &= ~APR_FINFO_INODE; + } + + apr_time_ansi_put(&finfo->atime, info->st_atime); +#ifdef HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC + finfo->atime += info->st_atim.tv_nsec / APR_TIME_C(1000); +#elif defined(HAVE_STRUCT_STAT_ST_ATIMENSEC) + finfo->atime += info->st_atimensec / APR_TIME_C(1000); +#elif defined(HAVE_STRUCT_STAT_ST_ATIME_N) + finfo->ctime += info->st_atime_n / APR_TIME_C(1000); +#endif + + apr_time_ansi_put(&finfo->mtime, info->st_mtime); +#ifdef HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC + finfo->mtime += info->st_mtim.tv_nsec / APR_TIME_C(1000); +#elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC) + finfo->mtime += info->st_mtimensec / APR_TIME_C(1000); +#elif defined(HAVE_STRUCT_STAT_ST_MTIME_N) + finfo->ctime += info->st_mtime_n / APR_TIME_C(1000); +#endif + + apr_time_ansi_put(&finfo->ctime, info->st_ctime); +#ifdef HAVE_STRUCT_STAT_ST_CTIM_TV_NSEC + finfo->ctime += info->st_ctim.tv_nsec / APR_TIME_C(1000); +#elif defined(HAVE_STRUCT_STAT_ST_CTIMENSEC) + finfo->ctime += info->st_ctimensec / APR_TIME_C(1000); +#elif defined(HAVE_STRUCT_STAT_ST_CTIME_N) + finfo->ctime += info->st_ctime_n / APR_TIME_C(1000); +#endif + +#ifdef HAVE_STRUCT_STAT_ST_BLOCKS +#ifdef DEV_BSIZE + finfo->csize = (apr_off_t)info->st_blocks * (apr_off_t)DEV_BSIZE; +#else + finfo->csize = (apr_off_t)info->st_blocks * (apr_off_t)512; +#endif + finfo->valid |= APR_FINFO_CSIZE; +#endif +} + + +static int +mod_glfs_map_to_storage(request_rec *r) +{ + glusterfs_dir_config_t *dir_config = NULL, *tmp = NULL; + int access_status; + int ret; + char *path = NULL; + struct stat st = {0, }; + core_server_config *sconf = NULL; + ap_conf_vector_t **sec_ent = NULL; + int num_sec = 0, i = 0; + + sconf = (core_server_config *) ap_get_module_config (r->server->module_config, &core_module); + sec_ent = (ap_conf_vector_t **) sconf->sec_url->elts; + num_sec = sconf->sec_url->nelts; + + for (i = 0; i < num_sec; i++) { + tmp = ap_get_module_config (sec_ent[i], &glusterfs_module); + + if (tmp && !strncmp (tmp->mount_dir, r->uri, strlen (tmp->mount_dir))) { + if (!dir_config || + strlen (tmp->mount_dir) > strlen (dir_config->mount_dir)) { + dir_config = tmp; + } + } + + } + + if (dir_config && dir_config->mount_dir && !(strncmp (apr_pstrcat (r->pool, dir_config->mount_dir, "/", NULL), r->uri, strlen (dir_config->mount_dir) + 1) && !r->handler)) + r->handler = GLUSTERFS_HANDLER; //apr_pstrdup (r->pool, GLUSTERFS_HANDLER); + + if (!r->handler || (r->handler && strcmp (r->handler, GLUSTERFS_HANDLER))) + return DECLINED; + + if (dir_config->mount_dir) + path = r->uri + strlen (dir_config->mount_dir); + + memset (&r->finfo, 0, sizeof (r->finfo)); + + dir_config->buf = calloc (1, dir_config->xattr_file_size); + if (!dir_config->buf) { + return HTTP_INTERNAL_SERVER_ERROR; + } + + if (!dir_config->handle) { + ap_log_rerror(APLOG_MARK, APLOG_ERR, APR_EGENERAL, r, + "mod_glfs_map_to_storage: glusterfs handle is NULL, check glusterfs logfile %s", + dir_config->logfile); + return HTTP_INTERNAL_SERVER_ERROR; + } + + ret = glusterfs_lookup (dir_config->handle, path, dir_config->buf, + dir_config->xattr_file_size, &st); + + if (ret == -1 || st.st_size > dir_config->xattr_file_size || S_ISDIR (st.st_mode)) { + free (dir_config->buf); + dir_config->buf = NULL; + + if (ret == -1) { + int error = HTTP_NOT_FOUND; + char *emsg = NULL; + if (r->path_info == NULL) { + emsg = apr_pstrcat(r->pool, strerror (errno), r->filename, NULL); + } + else { + emsg = apr_pstrcat(r->pool, strerror (errno), r->filename, r->path_info, NULL); + } + ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, r, "%s", emsg); + if (errno != ENOENT) { + error = HTTP_INTERNAL_SERVER_ERROR; + } + return error; + } + } + + r->finfo.pool = r->pool; + r->finfo.fname = r->filename; + fill_out_finfo (&r->finfo, &st, + APR_FINFO_MIN | APR_FINFO_IDENT | APR_FINFO_NLINK | APR_FINFO_OWNER | APR_FINFO_PROT); + + /* r->filename = apr_pstrcat (r->pool, r->filename, r->path_info, NULL); */ + + /* allow core module to run directory_walk() and location_walk() */ + return DECLINED; +} + + +static int +mod_glfs_readv_async_cbk (glusterfs_read_buf_t *buf, + void *cbk_data) +{ + glusterfs_async_local_t *local = cbk_data; + + pthread_mutex_lock (&local->lock); + { + local->async_read_complete = 1; + local->buf = buf; + pthread_cond_signal (&local->cond); + } + pthread_mutex_unlock (&local->lock); + + return 0; +} + +/* use read_async just to avoid memcpy of read buffer in libglusterfsclient */ +static int +mod_glfs_read_async (request_rec *r, apr_bucket_brigade *bb, long fd, apr_off_t offset, apr_off_t length) +{ + glusterfs_async_local_t local; + off_t end; + int nbytes; + int complete; + conn_rec *c = r->connection; + apr_bucket *e = NULL; + apr_status_t status; + + if (length == 0) { + return 0; + } + + pthread_cond_init (&local.cond, NULL); + pthread_mutex_init (&local.lock, NULL); + + memset (&local, 0, sizeof (local)); + local.request = r; + + if (length > 0) + end = offset + length; + + do { + glusterfs_read_buf_t *buf; + if (length > 0) { + nbytes = end - offset; + if (nbytes > GLUSTERFS_CHUNK_SIZE) + nbytes = GLUSTERFS_CHUNK_SIZE; + } else + nbytes = GLUSTERFS_CHUNK_SIZE; + + glusterfs_read_async(fd, + nbytes, + offset, + mod_glfs_readv_async_cbk, + (void *)&local); + + pthread_mutex_lock (&local.lock); + { + while (!local.async_read_complete) { + pthread_cond_wait (&local.cond, &local.lock); + } + + local.op_ret = local.buf->op_ret; + local.op_errno = local.buf->op_errno; + + local.async_read_complete = 0; + buf = local.buf; + + if (length < 0) + complete = (local.buf->op_ret <= 0); + else { + local.read_bytes += local.buf->op_ret; + complete = ((local.read_bytes == length) || (local.buf->op_ret < 0)); + } + } + pthread_mutex_unlock (&local.lock); + + if (!bb) { + bb = apr_brigade_create (r->pool, c->bucket_alloc); + } + apr_brigade_writev (bb, NULL, NULL, buf->vector, buf->count); + + /* make sure all the data is written out, since we call glusterfs_free on buf once + ap_pass_brigade returns */ + e = apr_bucket_flush_create (c->bucket_alloc); + APR_BRIGADE_INSERT_TAIL (bb, e); + + status = ap_pass_brigade (r->output_filters, bb); + if (status != APR_SUCCESS) { + /* no way to know what type of error occurred */ + ap_log_rerror(APLOG_MARK, APLOG_DEBUG, status, r, + "mod_glfs_handler: ap_pass_brigade returned %i", + status); + complete = 1; + local.op_ret = -1; + } + + glusterfs_free (buf); + + /* bb has already been cleaned up by core_output_filter, just being paranoid */ + apr_brigade_cleanup (bb); + + offset += nbytes; + } while (!complete); + + return (local.op_ret < 0 ? HTTP_INTERNAL_SERVER_ERROR : OK); +} + +/* TODO: to read blocks of size "length" from offset "offset" */ +/* + static int + mod_glfs_read_sync (request_rec *r, int fd, off_t offset, off_t length) + { + int error = OK; + off_t read_bytes; + char buf [GLUSTERFS_CHUNK_SIZE]; + + while ((read_bytes = glusterfs_read (fd, buf, GLUSTERFS_CHUNK_SIZE)) && read_bytes != -1) { + ap_rwrite (buf, read_bytes, r); + } + if (read_bytes) { + error = SERVER_ERROR; + } + return error; + } +*/ + + +static int +parse_byterange(char *range, apr_off_t clength, + apr_off_t *start, apr_off_t *end) +{ + char *dash = strchr(range, '-'); + char *errp; + apr_off_t number; + + if (!dash) { + return 0; + } + + if ((dash == range)) { + /* In the form "-5" */ + if (apr_strtoff(&number, dash+1, &errp, 10) || *errp) { + return 0; + } + *start = clength - number; + *end = clength - 1; + } + else { + *dash++ = '\0'; + if (apr_strtoff(&number, range, &errp, 10) || *errp) { + return 0; + } + *start = number; + if (*dash) { + if (apr_strtoff(&number, dash, &errp, 10) || *errp) { + return 0; + } + *end = number; + } + else { /* "5-" */ + *end = clength - 1; + } + } + + if (*start < 0) { + *start = 0; + } + + if (*end >= clength) { + *end = clength - 1; + } + + if (*start > *end) { + return -1; + } + + return (*start > 0 || *end < clength); +} + + +static int use_range_x(request_rec *r) +{ + const char *ua; + return (apr_table_get(r->headers_in, "Request-Range") + || ((ua = apr_table_get(r->headers_in, "User-Agent")) + && ap_strstr_c(ua, "MSIE 3"))); +} + + +static int ap_set_byterange(request_rec *r) +{ + const char *range; + const char *if_range; + const char *match; + const char *ct; + int num_ranges; + + if (r->assbackwards) { + return 0; + } + + /* Check for Range request-header (HTTP/1.1) or Request-Range for + * backwards-compatibility with second-draft Luotonen/Franks + * byte-ranges (e.g. Netscape Navigator 2-3). + * + * We support this form, with Request-Range, and (farther down) we + * send multipart/x-byteranges instead of multipart/byteranges for + * Request-Range based requests to work around a bug in Netscape + * Navigator 2-3 and MSIE 3. + */ + + if (!(range = apr_table_get(r->headers_in, "Range"))) { + range = apr_table_get(r->headers_in, "Request-Range"); + } + + if (!range || strncasecmp(range, "bytes=", 6) || r->status != HTTP_OK) { + return 0; + } + + /* is content already a single range? */ + if (apr_table_get(r->headers_out, "Content-Range")) { + return 0; + } + + /* is content already a multiple range? */ + if ((ct = apr_table_get(r->headers_out, "Content-Type")) + && (!strncasecmp(ct, "multipart/byteranges", 20) + || !strncasecmp(ct, "multipart/x-byteranges", 22))) { + return 0; + } + + /* Check the If-Range header for Etag or Date. + * Note that this check will return false (as required) if either + * of the two etags are weak. + */ + if ((if_range = apr_table_get(r->headers_in, "If-Range"))) { + if (if_range[0] == '"') { + if (!(match = apr_table_get(r->headers_out, "Etag")) + || (strcmp(if_range, match) != 0)) { + return 0; + } + } + else if (!(match = apr_table_get(r->headers_out, "Last-Modified")) + || (strcmp(if_range, match) != 0)) { + return 0; + } + } + + if (!ap_strchr_c(range, ',')) { + /* a single range */ + num_ranges = 1; + } + else { + /* a multiple range */ + num_ranges = 2; + } + + r->status = HTTP_PARTIAL_CONTENT; + r->range = range + 6; + + return num_ranges; +} + + +static void +mod_glfs_handle_byte_ranges (request_rec *r, long fd, int num_ranges) +{ + conn_rec *c = r->connection; + char *boundary = NULL, *bound_head = NULL; + const char *orig_ct = NULL; + apr_bucket_brigade *bsend = NULL; + apr_bucket *e = NULL; + apr_off_t range_start; + apr_off_t range_end; + char *current = NULL; + apr_status_t rv; + char found = 0; + + orig_ct = ap_make_content_type (r, r->content_type); + + if (num_ranges > 1) { + boundary = apr_psprintf(r->pool, "%" APR_UINT64_T_HEX_FMT "%lx", + (apr_uint64_t)r->request_time, (long) getpid()); + + ap_set_content_type(r, apr_pstrcat(r->pool, "multipart", + use_range_x(r) ? "/x-" : "/", + "byteranges; boundary=", + boundary, NULL)); + + if (strcasecmp(orig_ct, NO_CONTENT_TYPE)) { + bound_head = apr_pstrcat(r->pool, + CRLF "--", boundary, + CRLF "Content-type: ", + orig_ct, + CRLF "Content-range: bytes ", + NULL); + } + else { + /* if we have no type for the content, do our best */ + bound_head = apr_pstrcat(r->pool, + CRLF "--", boundary, + CRLF "Content-range: bytes ", + NULL); + } +// ap_xlate_proto_to_ascii(bound_head, strlen(bound_head)); + } + + while ((current = ap_getword(r->pool, &r->range, ',')) + && (rv = parse_byterange(current, r->finfo.size, &range_start, + &range_end))) { + apr_bucket *e2; + apr_bucket *ec; + + bsend = NULL; + if (rv == -1) { + continue; + } + + found = 1; + + /* For single range requests, we must produce Content-Range header. + * Otherwise, we need to produce the multipart boundaries. + */ + if (num_ranges == 1) { + apr_table_setn(r->headers_out, "Content-Range", + apr_psprintf(r->pool, "bytes " BYTERANGE_FMT, + range_start, range_end, r->finfo.size)); + } + else { + char *ts; + /* this brigade holds what we will be sending */ + bsend = apr_brigade_create(r->pool, c->bucket_alloc); + + e = apr_bucket_pool_create(bound_head, strlen(bound_head), + r->pool, c->bucket_alloc); + APR_BRIGADE_INSERT_TAIL(bsend, e); + + ts = apr_psprintf(r->pool, BYTERANGE_FMT CRLF CRLF, + range_start, range_end, r->finfo.size); +// ap_xlate_proto_to_ascii(ts, strlen(ts)); + e = apr_bucket_pool_create(ts, strlen(ts), r->pool, + c->bucket_alloc); + APR_BRIGADE_INSERT_TAIL(bsend, e); + } + mod_glfs_read_async (r, bsend, fd, range_start, (range_end + 1 - range_start)); + } + + bsend = apr_brigade_create (r->pool, c->bucket_alloc); + + if (found == 0) { + r->status = HTTP_OK; + /* bsend is assumed to be empty if we get here. */ + e = ap_bucket_error_create(HTTP_RANGE_NOT_SATISFIABLE, NULL, + r->pool, c->bucket_alloc); + APR_BRIGADE_INSERT_TAIL(bsend, e); + e = apr_bucket_eos_create(c->bucket_alloc); + APR_BRIGADE_INSERT_TAIL(bsend, e); + ap_pass_brigade (r->output_filters, bsend); + return; + } + + if (num_ranges > 1) { + char *end; + + /* add the final boundary */ + end = apr_pstrcat(r->pool, CRLF "--", boundary, "--" CRLF, NULL); +// ap_xlate_proto_to_ascii(end, strlen(end)); + e = apr_bucket_pool_create(end, strlen(end), r->pool, c->bucket_alloc); + APR_BRIGADE_INSERT_TAIL(bsend, e); + } + + ap_pass_brigade (r->output_filters, bsend); +} + + + +/**************************************************************** + * + * Looking things up in config entries... + */ + +/* Structure used to hold entries when we're actually building an index */ + +struct ent { + char *name; + char *icon; + char *alt; + char *desc; + apr_off_t size; + apr_time_t lm; + struct ent *next; + int ascending, ignore_case, version_sort; + char key; + int isdir; +}; + +static char *find_item(request_rec *r, apr_array_header_t *list, int path_only) +{ + const char *content_type = ap_field_noparam(r->pool, r->content_type); + const char *content_encoding = r->content_encoding; + char *path = r->filename; + + struct mod_glfs_ai_item *items = (struct mod_glfs_ai_item *) list->elts; + int i; + + for (i = 0; i < list->nelts; ++i) { + struct mod_glfs_ai_item *p = &items[i]; + + /* Special cased for ^^DIRECTORY^^ and ^^BLANKICON^^ */ + if ((path[0] == '^') || (!ap_strcmp_match(path, p->apply_path))) { + if (!*(p->apply_to)) { + return p->data; + } + else if (p->type == BY_PATH || path[0] == '^') { + if (!ap_strcmp_match(path, p->apply_to)) { + return p->data; + } + } + else if (!path_only) { + if (!content_encoding) { + if (p->type == BY_TYPE) { + if (content_type + && !ap_strcasecmp_match(content_type, + p->apply_to)) { + return p->data; + } + } + } + else { + if (p->type == BY_ENCODING) { + if (!ap_strcasecmp_match(content_encoding, + p->apply_to)) { + return p->data; + } + } + } + } + } + } + return NULL; +} + +#define find_icon(d,p,t) find_item(p,d->icon_list,t) +#define find_alt(d,p,t) find_item(p,d->alt_list,t) +#define find_header(d,p) find_item(p,d->hdr_list,0) +#define find_readme(d,p) find_item(p,d->rdme_list,0) + +static char *find_default_item(char *bogus_name, apr_array_header_t *list) +{ + request_rec r; + /* Bleah. I tried to clean up find_item, and it lead to this bit + * of ugliness. Note that the fields initialized are precisely + * those that find_item looks at... + */ + r.filename = bogus_name; + r.content_type = r.content_encoding = NULL; + return find_item(&r, list, 1); +} + +#define find_default_icon(d,n) find_default_item(n, d->icon_list) +#define find_default_alt(d,n) find_default_item(n, d->alt_list) + +/* + * Look through the list of pattern/description pairs and return the first one + * if any) that matches the filename in the request. If multiple patterns + * match, only the first one is used; since the order in the array is the + * same as the order in which directives were processed, earlier matching + * directives will dominate. + */ + +#ifdef CASE_BLIND_FILESYSTEM +#define MATCH_FLAGS APR_FNM_CASE_BLIND +#else +#define MATCH_FLAGS 0 +#endif + +static char *find_desc(glusterfs_dir_config_t *dcfg, const char *filename_full) +{ + int i; + mod_glfs_ai_desc_t *list = (mod_glfs_ai_desc_t *) dcfg->desc_list->elts; + const char *filename_only; + const char *filename; + + /* + * If the filename includes a path, extract just the name itself + * for the simple matches. + */ + if ((filename_only = ap_strrchr_c(filename_full, '/')) == NULL) { + filename_only = filename_full; + } + else { + filename_only++; + } + for (i = 0; i < dcfg->desc_list->nelts; ++i) { + mod_glfs_ai_desc_t *tuple = &list[i]; + int found; + + /* + * Only use the full-path filename if the pattern contains '/'s. + */ + filename = (tuple->full_path) ? filename_full : filename_only; + /* + * Make the comparison using the cheapest method; only do + * wildcard checking if we must. + */ + if (tuple->wildcards) { + found = (apr_fnmatch(tuple->pattern, filename, MATCH_FLAGS) == 0); + } + else { + found = (ap_strstr_c(filename, tuple->pattern) != NULL); + } + if (found) { + return tuple->description; + } + } + return NULL; +} + +static int ignore_entry(glusterfs_dir_config_t *d, char *path) +{ + apr_array_header_t *list = d->ign_list; + struct mod_glfs_ai_item *items = (struct mod_glfs_ai_item *) list->elts; + char *tt; + int i; + + if ((tt = strrchr(path, '/')) == NULL) { + tt = path; + } + else { + tt++; + } + + for (i = 0; i < list->nelts; ++i) { + struct mod_glfs_ai_item *p = &items[i]; + char *ap; + + if ((ap = strrchr(p->apply_to, '/')) == NULL) { + ap = p->apply_to; + } + else { + ap++; + } + +#ifndef CASE_BLIND_FILESYSTEM + if (!ap_strcmp_match(path, p->apply_path) + && !ap_strcmp_match(tt, ap)) { + return 1; + } +#else /* !CASE_BLIND_FILESYSTEM */ + /* + * On some platforms, the match must be case-blind. This is really + * a factor of the filesystem involved, but we can't detect that + * reliably - so we have to granularise at the OS level. + */ + if (!ap_strcasecmp_match(path, p->apply_path) + && !ap_strcasecmp_match(tt, ap)) { + return 1; + } +#endif /* !CASE_BLIND_FILESYSTEM */ + } + return 0; +} + +/***************************************************************** + * + * Actually generating output + */ + +/* + * Elements of the emitted document: + * Preamble + * Emitted unless SUPPRESS_PREAMBLE is set AND ap_run_sub_req + * succeeds for the (content_type == text/html) header file. + * Header file + * Emitted if found (and able). + * H1 tag line + * Emitted if a header file is NOT emitted. + * Directory stuff + * Always emitted. + * HR + * Emitted if FANCY_INDEXING is set. + * Readme file + * Emitted if found (and able). + * ServerSig + * Emitted if ServerSignature is not Off AND a readme file + * is NOT emitted. + * Postamble + * Emitted unless SUPPRESS_PREAMBLE is set AND ap_run_sub_req + * succeeds for the (content_type == text/html) readme file. + */ + + +/* + * emit a plain text file + */ +static void do_emit_plain(request_rec *r, apr_file_t *f) +{ + char buf[AP_IOBUFSIZE + 1]; + int ch; + apr_size_t i, c, n; + apr_status_t rv; + + ap_rputs("
\n", r);
+        while (!apr_file_eof(f)) {
+                do {
+                        n = sizeof(char) * AP_IOBUFSIZE;
+                        rv = apr_file_read(f, buf, &n);
+                } while (APR_STATUS_IS_EINTR(rv));
+                if (n == 0 || rv != APR_SUCCESS) {
+                        /* ###: better error here? */
+                        break;
+                }
+                buf[n] = '\0';
+                c = 0;
+                while (c < n) {
+                        for (i = c; i < n; i++) {
+                                if (buf[i] == '<' || buf[i] == '>' || buf[i] == '&') {
+                                        break;
+                                }
+                        }
+                        ch = buf[i];
+                        buf[i] = '\0';
+                        ap_rputs(&buf[c], r);
+                        if (ch == '<') {
+                                ap_rputs("<", r);
+                        }
+                        else if (ch == '>') {
+                                ap_rputs(">", r);
+                        }
+                        else if (ch == '&') {
+                                ap_rputs("&", r);
+                        }
+                        c = i + 1;
+                }
+        }
+        ap_rputs("
\n", r); +} + +/* + * Handle the preamble through the H1 tag line, inclusive. Locate + * the file with a subrequests. Process text/html documents by actually + * running the subrequest; text/xxx documents get copied verbatim, + * and any other content type is ignored. This means that a non-text + * document (such as HEADER.gif) might get multiviewed as the result + * instead of a text document, meaning nothing will be displayed, but + * oh well. + */ +static void emit_head(request_rec *r, char *header_fname, int suppress_amble, + int emit_xhtml, char *title) +{ + apr_table_t *hdrs = r->headers_in; + apr_file_t *f = NULL; + request_rec *rr = NULL; + int emit_amble = 1; + int emit_H1 = 1; + const char *r_accept; + const char *r_accept_enc; + + /* + * If there's a header file, send a subrequest to look for it. If it's + * found and html do the subrequest, otherwise handle it + */ + r_accept = apr_table_get(hdrs, "Accept"); + r_accept_enc = apr_table_get(hdrs, "Accept-Encoding"); + apr_table_setn(hdrs, "Accept", "text/html, text/plain"); + apr_table_unset(hdrs, "Accept-Encoding"); + + + if ((header_fname != NULL) && r->args) { + header_fname = apr_pstrcat(r->pool, header_fname, "?", r->args, NULL); + } + + if ((header_fname != NULL) + && (rr = ap_sub_req_lookup_uri(header_fname, r, r->output_filters)) + && (rr->status == HTTP_OK) + && (rr->filename != NULL) + && (rr->finfo.filetype == APR_REG)) { + /* + * Check for the two specific cases we allow: text/html and + * text/anything-else. The former is allowed to be processed for + * SSIs. + */ + if (rr->content_type != NULL) { + if (!strcasecmp(ap_field_noparam(r->pool, rr->content_type), + "text/html")) { + ap_filter_t *f; + /* Hope everything will work... */ + emit_amble = 0; + emit_H1 = 0; + + if (! suppress_amble) { + emit_preamble(r, emit_xhtml, title); + } + /* This is a hack, but I can't find any better way to do this. + * The problem is that we have already created the sub-request, + * but we just inserted the OLD_WRITE filter, and the + * sub-request needs to pass its data through the OLD_WRITE + * filter, or things go horribly wrong (missing data, data in + * the wrong order, etc). To fix it, if you create a + * sub-request and then insert the OLD_WRITE filter before you + * run the request, you need to make sure that the sub-request + * data goes through the OLD_WRITE filter. Just steal this + * code. The long-term solution is to remove the ap_r* + * functions. + */ + for (f=rr->output_filters; + f->frec != ap_subreq_core_filter_handle; f = f->next); + f->next = r->output_filters; + + /* + * If there's a problem running the subrequest, display the + * preamble if we didn't do it before -- the header file + * didn't get displayed. + */ + if (ap_run_sub_req(rr) != OK) { + /* It didn't work */ + emit_amble = suppress_amble; + emit_H1 = 1; + } + } + else if (!strncasecmp("text/", rr->content_type, 5)) { + /* + * If we can open the file, prefix it with the preamble + * regardless; since we'll be sending a 
 block around
+                                 * the file's contents, any HTML header it had won't end up
+                                 * where it belongs.
+                                 */
+                                if (apr_file_open(&f, rr->filename, APR_READ,
+                                                  APR_OS_DEFAULT, r->pool) == APR_SUCCESS) {
+                                        emit_preamble(r, emit_xhtml, title);
+                                        emit_amble = 0;
+                                        do_emit_plain(r, f);
+                                        apr_file_close(f);
+                                        emit_H1 = 0;
+                                }
+                        }
+                }
+        }
+
+        if (r_accept) {
+                apr_table_setn(hdrs, "Accept", r_accept);
+        }
+        else {
+                apr_table_unset(hdrs, "Accept");
+        }
+
+        if (r_accept_enc) {
+                apr_table_setn(hdrs, "Accept-Encoding", r_accept_enc);
+        }
+
+        if (emit_amble) {
+                emit_preamble(r, emit_xhtml, title);
+        }
+        if (emit_H1) {
+                ap_rvputs(r, "
Index of ", title, "
\n", NULL);
+        }
+        if (rr != NULL) {
+                ap_destroy_sub_req(rr);
+        }
+}
+
+
+/*
+ * Handle the Readme file through the postamble, inclusive.  Locate
+ * the file with a subrequests.  Process text/html documents by actually
+ * running the subrequest; text/xxx documents get copied verbatim,
+ * and any other content type is ignored.  This means that a non-text
+ * document (such as FOOTER.gif) might get multiviewed as the result
+ * instead of a text document, meaning nothing will be displayed, but
+ * oh well.
+ */
+static void emit_tail(request_rec *r, char *readme_fname, int suppress_amble)
+{
+        apr_file_t *f = NULL;
+        request_rec *rr = NULL;
+        int suppress_post = 0;
+        int suppress_sig = 0;
+
+        /*
+         * If there's a readme file, send a subrequest to look for it.  If it's
+         * found and a text file, handle it -- otherwise fall through and
+         * pretend there's nothing there.
+         */
+        if ((readme_fname != NULL)
+            && (rr = ap_sub_req_lookup_uri(readme_fname, r, r->output_filters))
+            && (rr->status == HTTP_OK)
+            && (rr->filename != NULL)
+            && rr->finfo.filetype == APR_REG) {
+                /*
+                 * Check for the two specific cases we allow: text/html and
+                 * text/anything-else.  The former is allowed to be processed for
+                 * SSIs.
+                 */
+                if (rr->content_type != NULL) {
+                        if (!strcasecmp(ap_field_noparam(r->pool, rr->content_type),
+                                        "text/html")) {
+                                ap_filter_t *f;
+                                for (f=rr->output_filters;
+                                     f->frec != ap_subreq_core_filter_handle; f = f->next);
+                                f->next = r->output_filters;
+
+
+                                if (ap_run_sub_req(rr) == OK) {
+                                        /* worked... */
+                                        suppress_sig = 1;
+                                        suppress_post = suppress_amble;
+                                }
+                        }
+                        else if (!strncasecmp("text/", rr->content_type, 5)) {
+                                /*
+                                 * If we can open the file, suppress the signature.
+                                 */
+                                if (apr_file_open(&f, rr->filename, APR_READ,
+                                                  APR_OS_DEFAULT, r->pool) == APR_SUCCESS) {
+                                        do_emit_plain(r, f);
+                                        apr_file_close(f);
+                                        suppress_sig = 1;
+                                }
+                        }
+                }
+        }
+
+        if (!suppress_sig) {
+                ap_rputs(ap_psignature("", r), r);
+        }
+        if (!suppress_post) {
+                ap_rputs("\n", r);
+        }
+        if (rr != NULL) {
+                ap_destroy_sub_req(rr);
+        }
+}
+
+
+static char *find_title(request_rec *r)
+{
+        char titlebuf[MAX_STRING_LEN], *find = "";
+        apr_file_t *thefile = NULL;
+        int x, y, p;
+        apr_size_t n;
+
+        if (r->status != HTTP_OK) {
+                return NULL;
+        }
+        if ((r->content_type != NULL)
+            && (!strcasecmp(ap_field_noparam(r->pool, r->content_type),
+                            "text/html")
+                || !strcmp(r->content_type, INCLUDES_MAGIC_TYPE))
+            && !r->content_encoding) {
+                if (apr_file_open(&thefile, r->filename, APR_READ,
+                                  APR_OS_DEFAULT, r->pool) != APR_SUCCESS) {
+                        return NULL;
+                }
+                n = sizeof(char) * (MAX_STRING_LEN - 1);
+                apr_file_read(thefile, titlebuf, &n);
+                if (n <= 0) {
+                        apr_file_close(thefile);
+                        return NULL;
+                }
+                titlebuf[n] = '\0';
+                for (x = 0, p = 0; titlebuf[x]; x++) {
+                        if (apr_tolower(titlebuf[x]) == find[p]) {
+                                if (!find[++p]) {
+                                        if ((p = ap_ind(&titlebuf[++x], '<')) != -1) {
+                                                titlebuf[x + p] = '\0';
+                                        }
+                                        /* Scan for line breaks for Tanmoy's secretary */
+                                        for (y = x; titlebuf[y]; y++) {
+                                                if ((titlebuf[y] == CR) || (titlebuf[y] == LF)) {
+                                                        if (y == x) {
+                                                                x++;
+                                                        }
+                                                        else {
+                                                                titlebuf[y] = ' ';
+                                                        }
+                                                }
+                                        }
+                                        apr_file_close(thefile);
+                                        return apr_pstrdup(r->pool, &titlebuf[x]);
+                                }
+                        }
+                        else {
+                                p = 0;
+                        }
+                }
+                apr_file_close(thefile);
+        }
+        return NULL;
+}
+
+static struct ent *make_parent_entry(apr_int32_t autoindex_opts,
+                                     glusterfs_dir_config_t *d,
+                                     request_rec *r, char keyid,
+                                     char direction)
+{
+        struct ent *p = (struct ent *) apr_pcalloc(r->pool, sizeof(struct ent));
+        char *testpath;
+        /*
+         * p->name is now the true parent URI.
+         * testpath is a crafted lie, so that the syntax '/some/..'
+         * (or simply '..')be used to describe 'up' from '/some/'
+         * when processeing IndexIgnore, and Icon|Alt|Desc configs.
+         */
+
+        /* The output has always been to the parent.  Don't make ourself
+         * our own parent (worthless cyclical reference).
+         */
+        if (!(p->name = ap_make_full_path(r->pool, r->uri, "../"))) {
+                return (NULL);
+        }
+        ap_getparents(p->name);
+        if (!*p->name) {
+                return (NULL);
+        }
+
+        /* IndexIgnore has always compared "/thispath/.." */
+        testpath = ap_make_full_path(r->pool, r->filename, "..");
+        if (ignore_entry(d, testpath)) {
+                return (NULL);
+        }
+
+        p->size = -1;
+        p->lm = -1;
+        p->key = apr_toupper(keyid);
+        p->ascending = (apr_toupper(direction) == D_ASCENDING);
+        p->version_sort = autoindex_opts & VERSION_SORT;
+        if (autoindex_opts & FANCY_INDEXING) {
+                if (!(p->icon = find_default_icon(d, testpath))) {
+                        p->icon = find_default_icon(d, "^^DIRECTORY^^");
+                }
+                if (!(p->alt = find_default_alt(d, testpath))) {
+                        if (!(p->alt = find_default_alt(d, "^^DIRECTORY^^"))) {
+                                p->alt = "DIR";
+                        }
+                }
+                p->desc = find_desc(d, testpath);
+        }
+        return p;
+}
+
+static struct ent *make_autoindex_entry(const apr_finfo_t *dirent,
+                                        int autoindex_opts,
+                                        glusterfs_dir_config_t *d,
+                                        request_rec *r, char keyid,
+                                        char direction,
+                                        const char *pattern)
+{
+        request_rec *rr;
+        struct ent *p;
+        int show_forbidden = 0;
+
+        /* Dot is ignored, Parent is handled by make_parent_entry() */
+        if ((dirent->name[0] == '.') && (!dirent->name[1]
+                                         || ((dirent->name[1] == '.') && !dirent->name[2])))
+                return (NULL);
+
+        /*
+         * On some platforms, the match must be case-blind.  This is really
+         * a factor of the filesystem involved, but we can't detect that
+         * reliably - so we have to granularise at the OS level.
+         */
+        if (pattern && (apr_fnmatch(pattern, dirent->name,
+                                    APR_FNM_NOESCAPE | APR_FNM_PERIOD
+#ifdef CASE_BLIND_FILESYSTEM
+                                    | APR_FNM_CASE_BLIND
+#endif
+                                )
+                        != APR_SUCCESS)) {
+                return (NULL);
+        }
+
+        if (ignore_entry(d, ap_make_full_path(r->pool,
+                                              r->filename, dirent->name))) {
+                return (NULL);
+        }
+
+        if (!(rr = ap_sub_req_lookup_dirent(dirent, r, AP_SUBREQ_NO_ARGS, NULL))) {
+                return (NULL);
+        }
+
+        if((autoindex_opts & SHOW_FORBIDDEN)
+           && (rr->status == HTTP_UNAUTHORIZED || rr->status == HTTP_FORBIDDEN)) {
+                show_forbidden = 1;
+        }
+
+        if ((rr->finfo.filetype != APR_DIR && rr->finfo.filetype != APR_REG)
+            || !(rr->status == OK || ap_is_HTTP_SUCCESS(rr->status)
+                 || ap_is_HTTP_REDIRECT(rr->status)
+                 || show_forbidden == 1)) {
+                ap_destroy_sub_req(rr);
+                return (NULL);
+        }
+
+        p = (struct ent *) apr_pcalloc(r->pool, sizeof(struct ent));
+        if (dirent->filetype == APR_DIR) {
+                p->name = apr_pstrcat(r->pool, dirent->name, "/", NULL);
+        }
+        else {
+                p->name = apr_pstrdup(r->pool, dirent->name);
+        }
+        p->size = -1;
+        p->icon = NULL;
+        p->alt = NULL;
+        p->desc = NULL;
+        p->lm = -1;
+        p->isdir = 0;
+        p->key = apr_toupper(keyid);
+        p->ascending = (apr_toupper(direction) == D_ASCENDING);
+        p->version_sort = !!(autoindex_opts & VERSION_SORT);
+        p->ignore_case = !!(autoindex_opts & IGNORE_CASE);
+
+        if (autoindex_opts & (FANCY_INDEXING | TABLE_INDEXING)) {
+                p->lm = rr->finfo.mtime;
+                if (dirent->filetype == APR_DIR) {
+                        if (autoindex_opts & FOLDERS_FIRST) {
+                                p->isdir = 1;
+                        }
+                        rr->filename = ap_make_dirstr_parent (rr->pool, rr->filename);
+
+                        /* omit the trailing slash (1.3 compat) */
+                        rr->filename[strlen(rr->filename) - 1] = '\0';
+
+                        if (!(p->icon = find_icon(d, rr, 1))) {
+                                p->icon = find_default_icon(d, "^^DIRECTORY^^");
+                        }
+                        if (!(p->alt = find_alt(d, rr, 1))) {
+                                if (!(p->alt = find_default_alt(d, "^^DIRECTORY^^"))) {
+                                        p->alt = "DIR";
+                                }
+                        }
+                }
+                else {
+                        p->icon = find_icon(d, rr, 0);
+                        p->alt = find_alt(d, rr, 0);
+                        p->size = rr->finfo.size;
+                }
+
+                p->desc = find_desc(d, rr->filename);
+
+                if ((!p->desc) && (autoindex_opts & SCAN_HTML_TITLES)) {
+                        p->desc = apr_pstrdup(r->pool, find_title(rr));
+                }
+        }
+        ap_destroy_sub_req(rr);
+        /*
+         * We don't need to take any special action for the file size key.
+         * If we did, it would go here.
+         */
+        if (keyid == K_LAST_MOD) {
+                if (p->lm < 0) {
+                        p->lm = 0;
+                }
+        }
+        return (p);
+}
+
+static char *terminate_description(glusterfs_dir_config_t *d, char *desc,
+                                   apr_int32_t autoindex_opts, int desc_width)
+{
+        int maxsize = desc_width;
+        register int x;
+
+        /*
+         * If there's no DescriptionWidth in effect, default to the old
+         * behaviour of adjusting the description size depending upon
+         * what else is being displayed.  Otherwise, stick with the
+         * setting.
+         */
+        if (d->desc_adjust == K_UNSET) {
+                if (autoindex_opts & SUPPRESS_ICON) {
+                        maxsize += 6;
+                }
+                if (autoindex_opts & SUPPRESS_LAST_MOD) {
+                        maxsize += 19;
+                }
+                if (autoindex_opts & SUPPRESS_SIZE) {
+                        maxsize += 7;
+                }
+        }
+        for (x = 0; desc[x] && ((maxsize > 0) || (desc[x] == '<')); x++) {
+                if (desc[x] == '<') {
+                        while (desc[x] != '>') {
+                                if (!desc[x]) {
+                                        maxsize = 0;
+                                        break;
+                                }
+                                ++x;
+                        }
+                }
+                else if (desc[x] == '&') {
+                        /* entities like ä count as one character */
+                        --maxsize;
+                        for ( ; desc[x] != ';'; ++x) {
+                                if (desc[x] == '\0') {
+                                        maxsize = 0;
+                                        break;
+                                }
+                        }
+                }
+                else {
+                        --maxsize;
+                }
+        }
+        if (!maxsize && desc[x] != '\0') {
+                desc[x - 1] = '>';      /* Grump. */
+                desc[x] = '\0';         /* Double Grump! */
+        }
+        return desc;
+}
+
+/*
+ * Emit the anchor for the specified field.  If a field is the key for the
+ * current request, the link changes its meaning to reverse the order when
+ * selected again.  Non-active fields always start in ascending order.
+ */
+static void emit_link(request_rec *r, const char *anchor, char column,
+                      char curkey, char curdirection,
+                      const char *colargs, int nosort)
+{
+        if (!nosort) {
+                char qvalue[9];
+
+                qvalue[0] = '?';
+                qvalue[1] = 'C';
+                qvalue[2] = '=';
+                qvalue[3] = column;
+                qvalue[4] = ';';
+                qvalue[5] = 'O';
+                qvalue[6] = '=';
+                /* reverse? */
+                qvalue[7] = ((curkey == column) && (curdirection == D_ASCENDING))
+                        ? D_DESCENDING : D_ASCENDING;
+                qvalue[8] = '\0';
+                ap_rvputs(r, "<a href=\"", qvalue, colargs ? colargs : "",
+                          "\">", anchor, "</a>", NULL);
+        }
+        else {
+                ap_rputs(anchor, r);
+        }
+}
+
+static void output_directories(struct ent **ar, int n,
+                               glusterfs_dir_config_t *d, request_rec *r,
+                               apr_int32_t autoindex_opts, char keyid,
+                               char direction, const char *colargs)
+{
+        int x;
+        apr_size_t rv;
+        char *name = r->uri;
+        char *tp;
+        int static_columns = !!(autoindex_opts & SUPPRESS_COLSORT);
+        apr_pool_t *scratch;
+        int name_width;
+        int desc_width;
+        char *name_scratch;
+        char *pad_scratch;
+        char *breakrow = "";
+
+        apr_pool_create(&scratch, r->pool);
+        if (name[0] == '\0') {
+                name = "/";
+        }
+
+        name_width = d->name_width;
+        desc_width = d->desc_width;
+
+        if ((autoindex_opts & (FANCY_INDEXING | TABLE_INDEXING))
+            == FANCY_INDEXING) {
+                if (d->name_adjust == K_ADJUST) {
+                        for (x = 0; x < n; x++) {
+                                int t = strlen(ar[x]->name);
+                                if (t > name_width) {
+                                        name_width = t;
+                                }
+                        }
+                }
+
+                if (d->desc_adjust == K_ADJUST) {
+                        for (x = 0; x < n; x++) {
+                                if (ar[x]->desc != NULL) {
+                                        int t = strlen(ar[x]->desc);
+                                        if (t > desc_width) {
+                                                desc_width = t;
+                                        }
+                                }
+                        }
+                }
+        }
+        name_scratch = apr_palloc(r->pool, name_width + 1);
+        pad_scratch = apr_palloc(r->pool, name_width + 1);
+        memset(pad_scratch, ' ', name_width);
+        pad_scratch[name_width] = '\0';
+
+        if (autoindex_opts & TABLE_INDEXING) {
+                int cols = 1;
+                ap_rputs("<table><tr>", r);
+                if (!(autoindex_opts & SUPPRESS_ICON)) {
+                        ap_rputs("<th>", r);
+                        if ((tp = find_default_icon(d, "^^BLANKICON^^"))) {
+                                ap_rvputs(r, "<img src=\"", ap_escape_html(scratch, tp),
+                                          "\" alt=\"[ICO]\"", NULL);
+                                if (d->icon_width) {
+                                        ap_rprintf(r, " width=\"%d\"", d->icon_width);
+                                }
+                                if (d->icon_height) {
+                                        ap_rprintf(r, " height=\"%d\"", d->icon_height);
+                                }
+
+                                if (autoindex_opts & EMIT_XHTML) {
+                                        ap_rputs(" /", r);
+                                }
+                                ap_rputs("></th>", r);
+                        }
+                        else {
+                                ap_rputs(" </th>", r);
+                        }
+
+                        ++cols;
+                }
+                ap_rputs("<th>", r);
+                emit_link(r, "Name", K_NAME, keyid, direction,
+                          colargs, static_columns);
+                if (!(autoindex_opts & SUPPRESS_LAST_MOD)) {
+                        ap_rputs("</th><th>", r);
+                        emit_link(r, "Last modified", K_LAST_MOD, keyid, direction,
+                                  colargs, static_columns);
+                        ++cols;
+                }
+                if (!(autoindex_opts & SUPPRESS_SIZE)) {
+                        ap_rputs("</th><th>", r);
+                        emit_link(r, "Size", K_SIZE, keyid, direction,
+                                  colargs, static_columns);
+                        ++cols;
+                }
+                if (!(autoindex_opts & SUPPRESS_DESC)) {
+                        ap_rputs("</th><th>", r);
+                        emit_link(r, "Description", K_DESC, keyid, direction,
+                                  colargs, static_columns);
+                        ++cols;
+                }
+                if (!(autoindex_opts & SUPPRESS_RULES)) {
+                        breakrow = apr_psprintf(r->pool,
+                                                "<tr><th colspan=\"%d\">"
+                                                "<hr%s></th></tr>\n", cols,
+                                                (autoindex_opts & EMIT_XHTML) ? " /" : "");
+                }
+                ap_rvputs(r, "</th></tr>", breakrow, NULL);
+        }
+        else if (autoindex_opts & FANCY_INDEXING) {
+                ap_rputs("<pre>", r);
+                if (!(autoindex_opts & SUPPRESS_ICON)) {
+                        if ((tp = find_default_icon(d, "^^BLANKICON^^"))) {
+                                ap_rvputs(r, "<img src=\"", ap_escape_html(scratch, tp),
+                                          "\" alt=\"Icon \"", NULL);
+                                if (d->icon_width) {
+                                        ap_rprintf(r, " width=\"%d\"", d->icon_width);
+                                }
+                                if (d->icon_height) {
+                                        ap_rprintf(r, " height=\"%d\"", d->icon_height);
+                                }
+
+                                if (autoindex_opts & EMIT_XHTML) {
+                                        ap_rputs(" /", r);
+                                }
+                                ap_rputs("> ", r);
+                        }
+                        else {
+                                ap_rputs("      ", r);
+                        }
+                }
+                emit_link(r, "Name", K_NAME, keyid, direction,
+                          colargs, static_columns);
+                ap_rputs(pad_scratch + 4, r);
+                /*
+                 * Emit the guaranteed-at-least-one-space-between-columns byte.
+                 */
+                ap_rputs(" ", r);
+                if (!(autoindex_opts & SUPPRESS_LAST_MOD)) {
+                        emit_link(r, "Last modified", K_LAST_MOD, keyid, direction,
+                                  colargs, static_columns);
+                        ap_rputs("      ", r);
+                }
+                if (!(autoindex_opts & SUPPRESS_SIZE)) {
+                        emit_link(r, "Size", K_SIZE, keyid, direction,
+                                  colargs, static_columns);
+                        ap_rputs("  ", r);
+                }
+                if (!(autoindex_opts & SUPPRESS_DESC)) {
+                        emit_link(r, "Description", K_DESC, keyid, direction,
+                                  colargs, static_columns);
+                }
+                if (!(autoindex_opts & SUPPRESS_RULES)) {
+                        ap_rputs("<hr", r);
+                        if (autoindex_opts & EMIT_XHTML) {
+                                ap_rputs(" /", r);
+                        }
+                        ap_rputs(">", r);
+                }
+                else {
+                        ap_rputc('\n', r);
+                }
+        }
+        else {
+                ap_rputs("<ul>", r);
+        }
+
+        for (x = 0; x < n; x++) {
+                char *anchor, *t, *t2;
+                int nwidth;
+
+                apr_pool_clear(scratch);
+
+                t = ar[x]->name;
+                anchor = ap_escape_html(scratch, ap_os_escape_path(scratch, t, 0));
+
+                if (!x && t[0] == '/') {
+                        t2 = "Parent Directory";
+                }
+                else {
+                        t2 = t;
+                }
+
+                if (autoindex_opts & TABLE_INDEXING) {
+                        ap_rputs("<tr>", r);
+                        if (!(autoindex_opts & SUPPRESS_ICON)) {
+                                ap_rputs("<td valign=\"top\">", r);
+                                if (autoindex_opts & ICONS_ARE_LINKS) {
+                                        ap_rvputs(r, "<a href=\"", anchor, "\">", NULL);
+                                }
+                                if ((ar[x]->icon) || d->default_icon) {
+                                        ap_rvputs(r, "<img src=\"",
+                                                  ap_escape_html(scratch,
+                                                                 ar[x]->icon ? ar[x]->icon
+                                                                 : d->default_icon),
+                                                  "\" alt=\"[", (ar[x]->alt ? ar[x]->alt : "   "),
+                                                  "]\"", NULL);
+                                        if (d->icon_width) {
+                                                ap_rprintf(r, " width=\"%d\"", d->icon_width);
+                                        }
+                                        if (d->icon_height) {
+                                                ap_rprintf(r, " height=\"%d\"", d->icon_height);
+                                        }
+
+                                        if (autoindex_opts & EMIT_XHTML) {
+                                                ap_rputs(" /", r);
+                                        }
+                                        ap_rputs(">", r);
+                                }
+                                else {
+                                        ap_rputs(" ", r);
+                                }
+                                if (autoindex_opts & ICONS_ARE_LINKS) {
+                                        ap_rputs("</a></td>", r);
+                                }
+                                else {
+                                        ap_rputs("</td>", r);
+                                }
+                        }
+                        if (d->name_adjust == K_ADJUST) {
+                                ap_rvputs(r, "<td><a href=\"", anchor, "\">",
+                                          ap_escape_html(scratch, t2), "</a>", NULL);
+                        }
+                        else {
+                                nwidth = strlen(t2);
+                                if (nwidth > name_width) {
+                                        memcpy(name_scratch, t2, name_width - 3);
+                                        name_scratch[name_width - 3] = '.';
+                                        name_scratch[name_width - 2] = '.';
+                                        name_scratch[name_width - 1] = '>';
+                                        name_scratch[name_width] = 0;
+                                        t2 = name_scratch;
+                                        nwidth = name_width;
+                                }
+                                ap_rvputs(r, "<td><a href=\"", anchor, "\">",
+                                          ap_escape_html(scratch, t2),
+                                          "</a>", pad_scratch + nwidth, NULL);
+                        }
+                        if (!(autoindex_opts & SUPPRESS_LAST_MOD)) {
+                                if (ar[x]->lm != -1) {
+                                        char time_str[MAX_STRING_LEN];
+                                        apr_time_exp_t ts;
+                                        apr_time_exp_lt(&ts, ar[x]->lm);
+                                        apr_strftime(time_str, &rv, MAX_STRING_LEN,
+                                                     "</td><td align=\"right\">%d-%b-%Y %H:%M  ",
+                                                     &ts);
+                                        ap_rputs(time_str, r);
+                                }
+                                else {
+                                        ap_rputs("</td><td> ", r);
+                                }
+                        }
+                        if (!(autoindex_opts & SUPPRESS_SIZE)) {
+                                char buf[5];
+                                ap_rvputs(r, "</td><td align=\"right\">",
+                                          apr_strfsize(ar[x]->size, buf), NULL);
+                        }
+                        if (!(autoindex_opts & SUPPRESS_DESC)) {
+                                if (ar[x]->desc) {
+                                        if (d->desc_adjust == K_ADJUST) {
+                                                ap_rvputs(r, "</td><td>", ar[x]->desc, NULL);
+                                        }
+                                        else {
+                                                ap_rvputs(r, "</td><td>",
+                                                          terminate_description(d, ar[x]->desc,
+                                                                                autoindex_opts,
+                                                                                desc_width), NULL);
+                                        }
+                                }
+                        }
+                        else {
+                                ap_rputs("</td><td> ", r);
+                        }
+                        ap_rputs("</td></tr>\n", r);
+                }
+                else if (autoindex_opts & FANCY_INDEXING) {
+                        if (!(autoindex_opts & SUPPRESS_ICON)) {
+                                if (autoindex_opts & ICONS_ARE_LINKS) {
+                                        ap_rvputs(r, "<a href=\"", anchor, "\">", NULL);
+                                }
+                                if ((ar[x]->icon) || d->default_icon) {
+                                        ap_rvputs(r, "<img src=\"",
+                                                  ap_escape_html(scratch,
+                                                                 ar[x]->icon ? ar[x]->icon
+                                                                 : d->default_icon),
+                                                  "\" alt=\"[", (ar[x]->alt ? ar[x]->alt : "   "),
+                                                  "]\"", NULL);
+                                        if (d->icon_width) {
+                                                ap_rprintf(r, " width=\"%d\"", d->icon_width);
+                                        }
+                                        if (d->icon_height) {
+                                                ap_rprintf(r, " height=\"%d\"", d->icon_height);
+                                        }
+
+                                        if (autoindex_opts & EMIT_XHTML) {
+                                                ap_rputs(" /", r);
+                                        }
+                                        ap_rputs(">", r);
+                                }
+                                else {
+                                        ap_rputs("     ", r);
+                                }
+                                if (autoindex_opts & ICONS_ARE_LINKS) {
+                                        ap_rputs("</a> ", r);
+                                }
+                                else {
+                                        ap_rputc(' ', r);
+                                }
+                        }
+                        nwidth = strlen(t2);
+                        if (nwidth > name_width) {
+                                memcpy(name_scratch, t2, name_width - 3);
+                                name_scratch[name_width - 3] = '.';
+                                name_scratch[name_width - 2] = '.';
+                                name_scratch[name_width - 1] = '>';
+                                name_scratch[name_width] = 0;
+                                t2 = name_scratch;
+                                nwidth = name_width;
+                        }
+                        ap_rvputs(r, "<a href=\"", anchor, "\">",
+                                  ap_escape_html(scratch, t2),
+                                  "</a>", pad_scratch + nwidth, NULL);
+                        /*
+                         * The blank before the storm.. er, before the next field.
+                         */
+                        ap_rputs(" ", r);
+                        if (!(autoindex_opts & SUPPRESS_LAST_MOD)) {
+                                if (ar[x]->lm != -1) {
+                                        char time_str[MAX_STRING_LEN];
+                                        apr_time_exp_t ts;
+                                        apr_time_exp_lt(&ts, ar[x]->lm);
+                                        apr_strftime(time_str, &rv, MAX_STRING_LEN,
+                                                     "%d-%b-%Y %H:%M  ", &ts);
+                                        ap_rputs(time_str, r);
+                                }
+                                else {
+                                        /*Length="22-Feb-1998 23:42  " (see 4 lines above) */
+                                        ap_rputs("                   ", r);
+                                }
+                        }
+                        if (!(autoindex_opts & SUPPRESS_SIZE)) {
+                                char buf[5];
+                                ap_rputs(apr_strfsize(ar[x]->size, buf), r);
+                                ap_rputs("  ", r);
+                        }
+                        if (!(autoindex_opts & SUPPRESS_DESC)) {
+                                if (ar[x]->desc) {
+                                        ap_rputs(terminate_description(d, ar[x]->desc,
+                                                                       autoindex_opts,
+                                                                       desc_width), r);
+                                }
+                        }
+                        ap_rputc('\n', r);
+                }
+                else {
+                        ap_rvputs(r, "<li><a href=\"", anchor, "\"> ",
+                                  ap_escape_html(scratch, t2),
+                                  "</a></li>\n", NULL);
+                }
+        }
+        if (autoindex_opts & TABLE_INDEXING) {
+                ap_rvputs(r, breakrow, "</table>\n", NULL);
+        }
+        else if (autoindex_opts & FANCY_INDEXING) {
+                if (!(autoindex_opts & SUPPRESS_RULES)) {
+                        ap_rputs("<hr", r);
+                        if (autoindex_opts & EMIT_XHTML) {
+                                ap_rputs(" /", r);
+                        }
+                        ap_rputs("></pre>\n", r);
+                }
+                else {
+                        ap_rputs("</pre>\n", r);
+                }
+        }
+        else {
+                ap_rputs("</ul>\n", r);
+        }
+}
+
+/*
+ * Compare two file entries according to the sort criteria.  The return
+ * is essentially a signum function value.
+ */
+
+static int dsortf(struct ent **e1, struct ent **e2)
+{
+        struct ent *c1;
+        struct ent *c2;
+        int result = 0;
+
+        /*
+         * First, see if either of the entries is for the parent directory.
+         * If so, that *always* sorts lower than anything else.
+         */
+        if ((*e1)->name[0] == '/') {
+                return -1;
+        }
+        if ((*e2)->name[0] == '/') {
+                return 1;
+        }
+        /*
+         * Now see if one's a directory and one isn't, if we're set
+         * isdir for FOLDERS_FIRST.
+         */
+        if ((*e1)->isdir != (*e2)->isdir) {
+                return (*e1)->isdir ? -1 : 1;
+        }
+        /*
+         * All of our comparisons will be of the c1 entry against the c2 one,
+         * so assign them appropriately to take care of the ordering.
+         */
+        if ((*e1)->ascending) {
+                c1 = *e1;
+                c2 = *e2;
+        }
+        else {
+                c1 = *e2;
+                c2 = *e1;
+        }
+
+        switch (c1->key) {
+        case K_LAST_MOD:
+                if (c1->lm > c2->lm) {
+                        return 1;
+                }
+                else if (c1->lm < c2->lm) {
+                        return -1;
+                }
+                break;
+        case K_SIZE:
+                if (c1->size > c2->size) {
+                        return 1;
+                }
+                else if (c1->size < c2->size) {
+                        return -1;
+                }
+                break;
+        case K_DESC:
+                if (c1->version_sort) {
+                        result = apr_strnatcmp(c1->desc ? c1->desc : "",
+                                               c2->desc ? c2->desc : "");
+                }
+                else {
+                        result = strcmp(c1->desc ? c1->desc : "",
+                                        c2->desc ? c2->desc : "");
+                }
+                if (result) {
+                        return result;
+                }
+                break;
+        }
+
+        /* names may identical when treated case-insensitively,
+         * so always fall back on strcmp() flavors to put entries
+         * in deterministic order.  This means that 'ABC' and 'abc'
+         * will always appear in the same order, rather than
+         * variably between 'ABC abc' and 'abc ABC' order.
+         */
+
+        if (c1->version_sort) {
+                if (c1->ignore_case) {
+                        result = apr_strnatcasecmp (c1->name, c2->name);
+                }
+                if (!result) {
+                        result = apr_strnatcmp(c1->name, c2->name);
+                }
+        }
+
+        /* The names may be identical in respects other other than
+         * filename case when strnatcmp is used above, so fall back
+         * to strcmp on conflicts so that fn1.01.zzz and fn1.1.zzz
+         * are also sorted in a deterministic order.
+         */
+
+        if (!result && c1->ignore_case) {
+                result = strcasecmp (c1->name, c2->name);
+        }
+
+        if (!result) {
+                result = strcmp (c1->name, c2->name);
+        }
+
+        return result;
+}
+
+
+static int 
+mod_glfs_index_directory (request_rec *r,
+                          glusterfs_dir_config_t *autoindex_conf)
+{
+        char *title_name = ap_escape_html(r->pool, r->uri);
+        char *title_endp;
+        char *name = r->filename;
+        char *pstring = NULL;
+        apr_finfo_t dirent;
+        long fd = -1;
+        apr_status_t status;
+        int num_ent = 0, x;
+        struct ent *head, *p;
+        struct ent **ar = NULL;
+        const char *qstring;
+        apr_int32_t autoindex_opts = autoindex_conf->opts;
+        char keyid;
+        char direction;
+        char *colargs;
+        char *fullpath;
+        apr_size_t dirpathlen;
+        char *ctype = "text/html";
+        char *charset;
+        glusterfs_dir_config_t *dir_config = NULL;
+        int ret = -1;
+        struct dirent entry = {0, };
+        struct stat st = {0, };
+        char *path = NULL;
+        char *fname = NULL;
+
+        dir_config = mod_glfs_dconfig (r);
+        if (!dir_config || !dir_config->handle) {
+                return HTTP_INTERNAL_SERVER_ERROR;
+        }
+
+        path = r->uri + strlen (dir_config->mount_dir);
+        if (!dir_config->handle) {
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
+                              "mod_glfs_index_directory: glusterfs handler is NULL, check glusterfs logfile %s for more details", 
+                              dir_config->logfile);
+                return HTTP_INTERNAL_SERVER_ERROR;
+        }
+
+        fd = glusterfs_open (dir_config->handle, path, O_RDONLY, 0);
+        if (fd == 0) {
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+                              "file permissions deny server access: %s", r->filename);
+                return HTTP_FORBIDDEN;
+        }
+
+        if (autoindex_conf->ctype) {
+                ctype = autoindex_conf->ctype;
+        }
+        if (autoindex_conf->charset) {
+                charset = autoindex_conf->charset;
+        }
+        else {
+#if APR_HAS_UNICODE_FS
+                charset = "UTF-8";
+#else
+                charset = "ISO-8859-1";
+#endif
+        }
+        if (*charset) {
+                ap_set_content_type(r, apr_pstrcat(r->pool, ctype, ";charset=",
+                                                   charset, NULL));
+        }
+        else {
+                ap_set_content_type(r, ctype);
+        }
+
+        if (autoindex_opts & TRACK_MODIFIED) {
+                ap_update_mtime(r, r->finfo.mtime);
+                ap_set_last_modified(r);
+                ap_set_etag(r);
+        }
+        if (r->header_only) {
+                glusterfs_close (fd);
+                return 0;
+        }
+
+        /*
+         * If there is no specific ordering defined for this directory,
+         * default to ascending by filename.
+         */
+        keyid = autoindex_conf->default_keyid
+                ? autoindex_conf->default_keyid : K_NAME;
+        direction = autoindex_conf->default_direction
+                ? autoindex_conf->default_direction : D_ASCENDING;
+
+        /*
+         * Figure out what sort of indexing (if any) we're supposed to use.
+         *
+         * If no QUERY_STRING was specified or client query strings have been
+         * explicitly disabled.
+         * If we are ignoring the client, suppress column sorting as well.
+         */
+        if (autoindex_opts & IGNORE_CLIENT) {
+                qstring = NULL;
+                autoindex_opts |= SUPPRESS_COLSORT;
+                colargs = "";
+        }
+        else {
+                char fval[5], vval[5], *ppre = "", *epattern = "";
+                fval[0] = '\0'; vval[0] = '\0';
+                qstring = r->args;
+
+                while (qstring && *qstring) {
+
+                        /* C= First Sort key Column (N, M, S, D) */
+                        if (   qstring[0] == 'C' && qstring[1] == '='
+                               && qstring[2] && strchr(K_VALID, qstring[2])
+                               && (   qstring[3] == '&' || qstring[3] == ';'
+                                      || !qstring[3])) {
+                                keyid = qstring[2];
+                                qstring += qstring[3] ? 4 : 3;
+                        }
+
+                        /* O= Sort order (A, D) */
+                        else if (   qstring[0] == 'O' && qstring[1] == '='
+                                    && (   (qstring[2] == D_ASCENDING)
+                                           || (qstring[2] == D_DESCENDING))
+                                    && (   qstring[3] == '&' || qstring[3] == ';'
+                                           || !qstring[3])) {
+                                direction = qstring[2];
+                                qstring += qstring[3] ? 4 : 3;
+                        }
+
+                        /* F= Output Format (0 plain, 1 fancy (pre), 2 table) */
+                        else if (   qstring[0] == 'F' && qstring[1] == '='
+                                    && qstring[2] && strchr("012", qstring[2])
+                                    && (   qstring[3] == '&' || qstring[3] == ';'
+                                           || !qstring[3])) {
+                                if (qstring[2] == '0') {
+                                        autoindex_opts &= ~(FANCY_INDEXING | TABLE_INDEXING);
+                                }
+                                else if (qstring[2] == '1') {
+                                        autoindex_opts = (autoindex_opts | FANCY_INDEXING)
+                                                & ~TABLE_INDEXING;
+                                }
+                                else if (qstring[2] == '2') {
+                                        autoindex_opts |= FANCY_INDEXING | TABLE_INDEXING;
+                                }
+                                strcpy(fval, ";F= ");
+                                fval[3] = qstring[2];
+                                qstring += qstring[3] ? 4 : 3;
+                        }
+
+                        /* V= Version sort (0, 1) */
+                        else if (   qstring[0] == 'V' && qstring[1] == '='
+                                    && (qstring[2] == '0' || qstring[2] == '1')
+                                    && (   qstring[3] == '&' || qstring[3] == ';'
+                                           || !qstring[3])) {
+                                if (qstring[2] == '0') {
+                                        autoindex_opts &= ~VERSION_SORT;
+                                }
+                                else if (qstring[2] == '1') {
+                                        autoindex_opts |= VERSION_SORT;
+                                }
+                                strcpy(vval, ";V= ");
+                                vval[3] = qstring[2];
+                                qstring += qstring[3] ? 4 : 3;
+                        }
+
+                        /* P= wildcard pattern (*.foo) */
+                        else if (qstring[0] == 'P' && qstring[1] == '=') {
+                                const char *eos = qstring += 2; /* for efficiency */
+
+                                while (*eos && *eos != '&' && *eos != ';') {
+                                        ++eos;
+                                }
+
+                                if (eos == qstring) {
+                                        pstring = NULL;
+                                }
+                                else {
+                                        pstring = apr_pstrndup(r->pool, qstring, eos - qstring);
+                                        if (ap_unescape_url(pstring) != OK) {
+                                                /* ignore the pattern, if it's bad. */
+                                                pstring = NULL;
+                                        }
+                                        else {
+                                                ppre = ";P=";
+                                                /* be correct */
+                                                epattern = ap_escape_uri(r->pool, pstring);
+                                        }
+                                }
+
+                                if (*eos && *++eos) {
+                                        qstring = eos;
+                                }
+                                else {
+                                        qstring = NULL;
+                                }
+                        }
+
+                        /* Syntax error?  Ignore the remainder! */
+                        else {
+                                qstring = NULL;
+                        }
+                }
+                colargs = apr_pstrcat(r->pool, fval, vval, ppre, epattern, NULL);
+        }
+
+        /* Spew HTML preamble */
+        title_endp = title_name + strlen(title_name) - 1;
+
+        while (title_endp > title_name && *title_endp == '/') {
+                *title_endp-- = '\0';
+        }
+
+        emit_head(r, find_header(autoindex_conf, r),
+                  autoindex_opts & SUPPRESS_PREAMBLE,
+                  autoindex_opts & EMIT_XHTML, title_name);
+
+        /*
+         * Since we don't know how many dir. entries there are, put them into a
+         * linked list and then arrayificate them so qsort can use them.
+         */
+        head = NULL;
+        p = make_parent_entry(autoindex_opts, autoindex_conf, r, keyid, direction);
+        if (p != NULL) {
+                p->next = head;
+                head = p;
+                num_ent++;
+        }
+        fullpath = apr_palloc(r->pool, APR_PATH_MAX);
+        dirpathlen = strlen(name);
+        memcpy(fullpath, name, dirpathlen);
+
+        do {
+                ret = glusterfs_readdir (fd, &entry, sizeof (entry));
+                if (ret <= 0) {
+                        break;
+                }
+
+                fname = apr_pstrcat (r->pool, path, entry.d_name);
+
+                ret = glusterfs_stat (dir_config->handle, fname, &st);
+                if (ret != 0) {
+                        break;
+                }
+                
+                dirent.fname = fname;
+                dirent.name = apr_pstrdup (r->pool, entry.d_name);
+                fill_out_finfo (&dirent, &st, 
+                                APR_FINFO_MIN | APR_FINFO_IDENT | APR_FINFO_NLINK | APR_FINFO_OWNER | 
+                                APR_FINFO_PROT);
+
+                p = make_autoindex_entry(&dirent, autoindex_opts, autoindex_conf, r,
+                                         keyid, direction, pstring);
+                if (p != NULL) {
+                        p->next = head;
+                        head = p;
+                        num_ent++;
+                }
+        } while (1);
+
+        if (num_ent > 0) {
+                ar = (struct ent **) apr_palloc(r->pool,
+                                                num_ent * sizeof(struct ent *));
+                p = head;
+                x = 0;
+                while (p) {
+                        ar[x++] = p;
+                        p = p->next;
+                }
+
+                qsort((void *) ar, num_ent, sizeof(struct ent *),
+                      (int (*)(const void *, const void *)) dsortf);
+        }
+        output_directories(ar, num_ent, autoindex_conf, r, autoindex_opts,
+                           keyid, direction, colargs);
+        glusterfs_close (fd);
+
+        emit_tail(r, find_readme(autoindex_conf, r),
+                  autoindex_opts & SUPPRESS_PREAMBLE);
+
+        return 0;
+}
+
+
+static int 
+handle_autoindex(request_rec *r)
+{
+        glusterfs_dir_config_t *dir_config = NULL;
+        int allow_opts;
+
+        allow_opts = ap_allow_options(r);
+
+        r->allowed |= (AP_METHOD_BIT << M_GET);
+        if (r->method_number != M_GET) {
+                return DECLINED;
+        }
+
+        dir_config = mod_glfs_dconfig (r);
+
+        /* OK, nothing easy.  Trot out the heavy artillery... */
+
+        if (allow_opts & OPT_INDEXES) {
+                int errstatus;
+
+                if ((errstatus = ap_discard_request_body(r)) != OK) {
+                        return errstatus;
+                }
+
+                /* KLUDGE --- make the sub_req lookups happen in the right directory.
+                 * Fixing this in the sub_req_lookup functions themselves is difficult,
+                 * and would probably break virtual includes...
+                 */
+
+                if (r->filename[strlen(r->filename) - 1] != '/') {
+                        r->filename = apr_pstrcat(r->pool, r->filename, "/", NULL);
+                }
+                return mod_glfs_index_directory(r, dir_config);
+        } else {
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+                              "Directory index forbidden by "
+                              "Options directive: %s", r->filename);
+                return HTTP_FORBIDDEN;
+        }
+}
+
+
+static int 
+mod_glfs_handler (request_rec *r)
+{
+        conn_rec *c = r->connection;
+        apr_bucket_brigade *bb;
+        apr_bucket *e;
+        core_dir_config *d;
+        int errstatus;
+        long fd = -1;
+        apr_status_t status;
+        glusterfs_dir_config_t *dir_config = NULL;
+        char *path = NULL;
+        int num_ranges = 0;
+        apr_size_t size = 0;
+        apr_off_t range_start = 0, range_end = 0;
+        char *current = NULL;
+        apr_status_t rv = 0;
+
+        /* XXX if/when somebody writes a content-md5 filter we either need to
+         *     remove this support or coordinate when to use the filter vs.
+         *     when to use this code
+         *     The current choice of when to compute the md5 here matches the 1.3
+         *     support fairly closely (unlike 1.3, we don't handle computing md5
+         *     when the charset is translated).
+         */
+
+        int bld_content_md5;
+        if (!r->handler || (r->handler && strcmp (r->handler, GLUSTERFS_HANDLER)))
+                return DECLINED;
+
+        if (r->uri[0] == '\0') {
+                return DECLINED;
+        }
+  
+        if (r->finfo.filetype == APR_DIR) {
+                return handle_autoindex (r);
+        }
+
+        dir_config = mod_glfs_dconfig (r);
+
+        ap_allow_standard_methods(r, MERGE_ALLOW, M_GET, -1);
+  
+        /* We understood the (non-GET) method, but it might not be legal for
+           this particular resource. Check to see if the 'deliver_script'
+           flag is set. If so, then we go ahead and deliver the file since
+           it isn't really content (only GET normally returns content).
+
+           Note: based on logic further above, the only possible non-GET
+           method at this point is POST. In the future, we should enable
+           script delivery for all methods.  */
+        if (r->method_number != M_GET) {
+                core_request_config *req_cfg;
+
+                req_cfg = ap_get_module_config(r->request_config, &core_module);
+                if (!req_cfg->deliver_script) {
+                        /* The flag hasn't been set for this request. Punt. */
+                        ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+                                      "This resource does not accept the %s method.",
+                                      r->method);
+                        return HTTP_METHOD_NOT_ALLOWED;
+                }
+        }
+
+        if (!dir_config->handle) {
+                ap_log_rerror (APLOG_MARK, APLOG_ERR, 0, r,
+                               "glusterfs initialization failed\n");
+                return HTTP_FORBIDDEN;
+        }
+
+        d = (core_dir_config *)ap_get_module_config(r->per_dir_config,
+                                                    &core_module);
+        bld_content_md5 = (d->content_md5 & 1)
+                && r->output_filters->frec->ftype != AP_FTYPE_RESOURCE;
+
+        if ((errstatus = ap_discard_request_body(r)) != OK) {
+                return errstatus;
+        }
+
+        if (r->finfo.filetype == 0) {
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+                              "File does not exist: %s", r->filename);
+                return HTTP_NOT_FOUND;
+        }
+
+        if ((r->used_path_info != AP_REQ_ACCEPT_PATH_INFO) &&
+            r->path_info && *r->path_info)
+        {
+                /* default to reject */
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+                              "File does not exist: %s",
+                              apr_pstrcat(r->pool, r->filename, r->path_info, NULL));
+                return HTTP_NOT_FOUND;
+        }
+
+        ap_update_mtime (r, r->finfo.mtime);
+        ap_set_last_modified (r);
+        ap_set_etag (r);
+        apr_table_setn (r->headers_out, "Accept-Ranges", "bytes");
+
+        num_ranges = ap_set_byterange(r);
+        if (num_ranges == 0) {
+                size = r->finfo.size;
+        } else {
+                char *tmp = apr_pstrdup (r->pool, r->range);
+                while ((current = ap_getword(r->pool, (const char **)&tmp, ','))
+                       && (rv = parse_byterange(current, r->finfo.size, &range_start,
+                                                &range_end))) {
+                        size += (range_end - range_start);
+                }
+        }
+
+        ap_set_content_length (r, size);
+                        
+        if ((errstatus = ap_meets_conditions(r)) != OK) {
+                r->status = errstatus;
+        }
+
+        /* file is small enough to have already got the content in glusterfs_lookup */
+        if (r->finfo.size <= dir_config->xattr_file_size && dir_config->buf) {
+                if (bld_content_md5) {
+                        apr_table_setn (r->headers_out, "Content-MD5",
+                                        (const char *)ap_md5_binary(r->pool, dir_config->buf, r->finfo.size));
+                }
+
+                ap_log_rerror (APLOG_MARK, APLOG_NOTICE, 0, r, 
+                               "fetching data from glusterfs through xattr interface\n");
+                
+                bb = apr_brigade_create(r->pool, c->bucket_alloc);
+
+                e = apr_bucket_heap_create (dir_config->buf, r->finfo.size, free, c->bucket_alloc);
+                APR_BRIGADE_INSERT_TAIL (bb, e);
+                
+                e = apr_bucket_eos_create(c->bucket_alloc);
+                APR_BRIGADE_INSERT_TAIL(bb, e);
+
+                dir_config->buf = NULL;
+
+                /* let the byterange_filter handle multipart requests */
+                status = ap_pass_brigade(r->output_filters, bb);
+                if (status == APR_SUCCESS
+                    || r->status != HTTP_OK
+                    || c->aborted) {
+                        return OK;
+                }
+                else {
+                        /* no way to know what type of error occurred */
+                        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, status, r,
+                                      "mod_glfs_handler: ap_pass_brigade returned %i",
+                                      status);
+                        return HTTP_INTERNAL_SERVER_ERROR;
+                }
+        }
+        
+        if (!dir_config->handle) {
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
+                              "mod_glfs_handler: glusterfs handler is NULL, check glusterfs logfile %s for more details", 
+                              dir_config->logfile);
+                return HTTP_INTERNAL_SERVER_ERROR;
+        }
+
+        /* do standard open/read/close to fetch content */
+        path = r->uri + strlen (dir_config->mount_dir);
+        
+        fd = glusterfs_open (dir_config->handle, path , O_RDONLY, 0);
+        if (fd == 0) {
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+                              "file permissions deny server access: %s", r->filename);
+                return HTTP_FORBIDDEN;
+        }
+
+        /* byterange_filter cannot handle range requests, since we are not sending the 
+           whole data in a single brigade */
+
+
+        if (num_ranges == 0) {
+                mod_glfs_read_async (r, NULL, fd, 0, -1);
+        } else {
+                mod_glfs_handle_byte_ranges (r, fd, num_ranges);
+        }
+                
+        glusterfs_close (fd);
+}
+
+
+#if 0
+static apr_status_t 
+mod_glfs_output_filter (ap_filter_t *f,
+                        apr_bucket_brigade *b)
+{
+        size_t size = 0;
+        apr_bucket_t *e = NULL; 
+        size = atol (apr_table_get (r->notes, MOD_GLFS_SIZE));
+        
+        for (e = APR_BRIGADE_FIRST(b);
+             e != APR_BRIGADE_SENTINEL(b);
+             e = APR_BUCKET_NEXT(e))
+        {
+                /* FIXME: can there be more than one heap buckets? */
+                if (e->type == &apr_bucket_type_heap) {
+                        break;
+                }
+        }
+
+        if (e != APR_BRIGADE_SENTINEL(b)) {
+                e->length = size;
+        }
+
+        return ap_pass_brigade (f->next, b);
+}
+#endif
+
+static int 
+mod_glfs_fixup_dir(request_rec *r)
+{
+        glusterfs_dir_config_t *d;
+        char *dummy_ptr[1];
+        char **names_ptr;
+        int num_names;
+        int error_notfound = 0;
+
+        /* only handle requests against directories */
+        if (r->finfo.filetype != APR_DIR) {
+                return DECLINED;
+        }
+
+        if (!r->handler || strcmp (r->handler, GLUSTERFS_HANDLER)) {
+                return DECLINED;
+        }
+
+        /* Never tolerate path_info on dir requests */
+        if (r->path_info && *r->path_info) {
+                return DECLINED;
+        }
+
+        d = (glusterfs_dir_config_t *)ap_get_module_config(r->per_dir_config,
+                                                           &glusterfs_module);
+
+        /* Redirect requests that are not '/' terminated */
+        if (r->uri[0] == '\0' || r->uri[strlen(r->uri) - 1] != '/')
+        {
+                char *ifile;
+
+                if (!d->do_slash) {
+                        return DECLINED;
+                }
+
+                /* Only redirect non-get requests if we have no note to warn
+                 * that this browser cannot handle redirs on non-GET requests
+                 * (such as Microsoft's WebFolders).
+                 */
+                if ((r->method_number != M_GET)
+                    && apr_table_get(r->subprocess_env, "redirect-carefully")) {
+                        return DECLINED;
+                }
+
+                if (r->args != NULL) {
+                        ifile = apr_pstrcat(r->pool, ap_escape_uri(r->pool, r->uri),
+                                            "/", "?", r->args, NULL);
+                }
+                else {
+                        ifile = apr_pstrcat(r->pool, ap_escape_uri(r->pool, r->uri),
+                                            "/", NULL);
+                }
+
+                apr_table_setn(r->headers_out, "Location",
+                               ap_construct_url(r->pool, ifile, r));
+                return HTTP_MOVED_PERMANENTLY;
+        }
+
+        if (d->index_names) {
+                names_ptr = (char **)d->index_names->elts;
+                num_names = d->index_names->nelts;
+        }
+        else {
+                dummy_ptr[0] = AP_DEFAULT_INDEX;
+                names_ptr = dummy_ptr;
+                num_names = 1;
+        }
+
+        for (; num_names; ++names_ptr, --num_names) {
+                /* XXX: Is this name_ptr considered escaped yet, or not??? */
+                char *name_ptr = *names_ptr;
+                request_rec *rr;
+
+                /* Once upon a time args were handled _after_ the successful redirect.
+                 * But that redirect might then _refuse_ the given r->args, creating
+                 * a nasty tangle.  It seems safer to consider the r->args while we
+                 * determine if name_ptr is our viable index, and therefore set them
+                 * up correctly on redirect.
+                 */
+                if (r->args != NULL) {
+                        name_ptr = apr_pstrcat(r->pool, name_ptr, "?", r->args, NULL);
+                }
+
+                rr = ap_sub_req_lookup_uri(name_ptr, r, NULL);
+
+                /* The sub request lookup is very liberal, and the core map_to_storage
+                 * handler will almost always result in HTTP_OK as /foo/index.html
+                 * may be /foo with PATH_INFO="/index.html", or even / with
+                 * PATH_INFO="/foo/index.html". To get around this we insist that the
+                 * the index be a regular filetype.
+                 *
+                 * Another reason is that the core handler also makes the assumption
+                 * that if r->finfo is still NULL by the time it gets called, the
+                 * file does not exist.
+                 */
+                if (rr->status == HTTP_OK
+                    && (   (rr->handler && !strcmp(rr->handler, "proxy-server"))
+                           || rr->finfo.filetype == APR_REG)) {
+                        ap_internal_fast_redirect(rr, r);
+                        return OK;
+                }
+
+                /* If the request returned a redirect, propagate it to the client */
+
+                if (ap_is_HTTP_REDIRECT(rr->status)
+                    || (rr->status == HTTP_NOT_ACCEPTABLE && num_names == 1)
+                    || (rr->status == HTTP_UNAUTHORIZED && num_names == 1)) {
+
+                        apr_pool_join(r->pool, rr->pool);
+                        error_notfound = rr->status;
+                        r->notes = apr_table_overlay(r->pool, r->notes, rr->notes);
+                        r->headers_out = apr_table_overlay(r->pool, r->headers_out,
+                                                           rr->headers_out);
+                        r->err_headers_out = apr_table_overlay(r->pool, r->err_headers_out,
+                                                               rr->err_headers_out);
+                        return error_notfound;
+                }
+
+                /* If the request returned something other than 404 (or 200),
+                 * it means the module encountered some sort of problem. To be
+                 * secure, we should return the error, rather than allow autoindex
+                 * to create a (possibly unsafe) directory index.
+                 *
+                 * So we store the error, and if none of the listed files
+                 * exist, we return the last error response we got, instead
+                 * of a directory listing.
+                 */
+                if (rr->status && rr->status != HTTP_NOT_FOUND
+                    && rr->status != HTTP_OK) {
+                        error_notfound = rr->status;
+                }
+
+                ap_destroy_sub_req(rr);
+        }
+
+        if (error_notfound) {
+                return error_notfound;
+        }
+
+        /* nothing for us to do, pass on through */
+        return DECLINED;
+}
+
+
+static void 
+mod_glfs_register_hooks(apr_pool_t *p)
+{
+        ap_hook_child_init (mod_glfs_child_init, NULL, NULL, APR_HOOK_MIDDLE);
+        ap_hook_handler (mod_glfs_handler, NULL, NULL, APR_HOOK_REALLY_FIRST);
+        ap_hook_map_to_storage (mod_glfs_map_to_storage, NULL, NULL, APR_HOOK_REALLY_FIRST);
+        ap_hook_fixups(mod_glfs_fixup_dir,NULL,NULL,APR_HOOK_LAST);
+
+/*    mod_glfs_output_filter_handle = 
+      ap_register_output_filter ("MODGLFS", mod_glfs_output_filter,
+      NULL, AP_FTYPE_PROTOCOL); */
+}
+
+static const char *
+cmd_add_index (cmd_parms *cmd, void *dummy, const char *arg)
+{
+        glusterfs_dir_config_t *d = dummy;
+
+        if (!d->index_names) {
+                d->index_names = apr_array_make(cmd->pool, 2, sizeof(char *));
+        }
+        *(const char **)apr_array_push(d->index_names) = arg;
+        return NULL;
+}
+
+static const char *
+cmd_configure_slash (cmd_parms *cmd, void *d_, int arg)
+{
+        glusterfs_dir_config_t *d = d_;
+
+        d->do_slash = arg ? SLASH_ON : SLASH_OFF;
+        return NULL;
+}
+
+#define DIR_CMD_PERMS OR_INDEXES
+
+static const 
+command_rec mod_glfs_cmds[] =
+{
+        AP_INIT_TAKE1(
+                "GlusterfsLogfile",
+                cmd_add_logfile,
+                NULL,
+                ACCESS_CONF, /*FIXME: allow overriding in .htaccess files */
+                "Glusterfs logfile"
+                ),
+
+        AP_INIT_TAKE1(
+                "GlusterfsLoglevel",
+                cmd_set_loglevel,
+                NULL,
+                ACCESS_CONF,
+                "Glusterfs loglevel:anyone of none, critical, error, warning, debug"
+                ),
+
+        AP_INIT_TAKE1(
+                "GlusterfsCacheTimeout",
+                cmd_set_cache_timeout,
+                NULL,
+                ACCESS_CONF,
+                "Timeout value in seconds for lookup and stat cache of libglusterfsclient"
+                ),
+
+        AP_INIT_TAKE1(
+                "GlusterfsVolumeSpecfile",
+                cmd_add_volume_specfile,
+                NULL,
+                ACCESS_CONF,
+                "Glusterfs Volume specfication file specifying filesystem under this directory"
+                ),
+
+        AP_INIT_TAKE1(
+                "GlusterfsXattrFileSize",
+                cmd_add_xattr_file_size,
+                NULL,
+                ACCESS_CONF,
+                "Maximum size of the file that can be fetched through extended attribute interface of libglusterfsclient"
+                ),
+
+        /* mod_dir cmds */
+        AP_INIT_ITERATE("DirectoryIndex", cmd_add_index, 
+                        NULL, DIR_CMD_PERMS,
+                        "a list of file names"),
+
+        AP_INIT_FLAG("DirectorySlash", cmd_configure_slash, 
+                     NULL, DIR_CMD_PERMS,
+                     "On or Off"),
+
+        /* autoindex cmds */
+        AP_INIT_ITERATE2("AddIcon", cmd_add_icon, 
+                         BY_PATH, DIR_CMD_PERMS,
+                         "an icon URL followed by one or more filenames"),
+
+        AP_INIT_ITERATE2("AddIconByType", cmd_add_icon, 
+                         BY_TYPE, DIR_CMD_PERMS,
+                         "an icon URL followed by one or more MIME types"),
+
+        AP_INIT_ITERATE2("AddIconByEncoding", cmd_add_icon, 
+                         BY_ENCODING, DIR_CMD_PERMS,
+                         "an icon URL followed by one or more content encodings"),
+
+        AP_INIT_ITERATE2("AddAlt", cmd_add_alt, BY_PATH, 
+                         DIR_CMD_PERMS,
+                         "alternate descriptive text followed by one or more "
+                         "filenames"),
+
+        AP_INIT_ITERATE2("AddAltByType", cmd_add_alt, 
+                         BY_TYPE, DIR_CMD_PERMS,
+                         "alternate descriptive text followed by one or more MIME "
+                         "types"),
+
+        AP_INIT_ITERATE2("AddAltByEncoding", cmd_add_alt, 
+                         BY_ENCODING, DIR_CMD_PERMS,
+                         "alternate descriptive text followed by one or more "
+                         "content encodings"),
+
+        AP_INIT_TAKE_ARGV("IndexOptions", cmd_add_opts, 
+                          NULL, DIR_CMD_PERMS,
+                          "one or more index options [+|-][]"),
+
+        AP_INIT_TAKE2("IndexOrderDefault", cmd_set_default_order, 
+                      NULL, DIR_CMD_PERMS,
+                      "{Ascending,Descending} {Name,Size,Description,Date}"),
+
+        AP_INIT_ITERATE("IndexIgnore", cmd_add_ignore, 
+                        NULL, DIR_CMD_PERMS,
+                        "one or more file extensions"),
+
+        AP_INIT_ITERATE2("AddDescription", cmd_add_desc, 
+                         BY_PATH, DIR_CMD_PERMS,
+                         "Descriptive text followed by one or more filenames"),
+
+        AP_INIT_TAKE1("HeaderName", cmd_add_header, 
+                      NULL, DIR_CMD_PERMS,
+                      "a filename"),
+
+        AP_INIT_TAKE1("ReadmeName", cmd_add_readme, 
+                      NULL, DIR_CMD_PERMS,
+                      "a filename"),
+
+        AP_INIT_RAW_ARGS("FancyIndexing", ap_set_deprecated, 
+                         NULL, OR_ALL,
+                         "The FancyIndexing directive is no longer supported. "
+                         "Use IndexOptions FancyIndexing."),
+
+        AP_INIT_TAKE1("DefaultIcon", ap_set_string_slot,
+                      (void *)APR_OFFSETOF(glusterfs_dir_config_t, default_icon),
+                      DIR_CMD_PERMS, "an icon URL"),
+
+        AP_INIT_TAKE1("IndexStyleSheet", ap_set_string_slot,
+                      (void *)APR_OFFSETOF(glusterfs_dir_config_t, style_sheet),
+                      DIR_CMD_PERMS, "URL to style sheet"),
+
+        {NULL}
+};
+
+module AP_MODULE_DECLARE_DATA glusterfs_module =
+{
+        STANDARD20_MODULE_STUFF,
+        mod_glfs_create_dir_config,
+        mod_glfs_merge_dir_config,
+        NULL, //mod_glfs_create_server_config,
+        NULL, //mod_glfs_merge_server_config,
+        mod_glfs_cmds,
+        mod_glfs_register_hooks,
+};
diff --git a/mod_glusterfs/apache/Makefile.am b/mod_glusterfs/apache/Makefile.am
new file mode 100644
index 00000000000..bda03931052
--- /dev/null
+++ b/mod_glusterfs/apache/Makefile.am
@@ -0,0 +1,10 @@
+SUBDIRS = $(MOD_GLUSTERFS_HTTPD_VERSION)
+
+EXTRA_DIST = 1.3/Makefile.am 1.3/Makefile.in \
+	     1.3/src/Makefile.am 1.3/src/Makefile.in \
+	     1.3/src/mod_glusterfs.c \
+	     1.3/src/README.txt \
+	     2.2/Makefile.am 2.2/Makefile.in \
+	     2.2/src/Makefile.am 2.2/src/Makefile.in \
+	     2.2/src/mod_glusterfs.c
+CLEANFILES = 
diff --git a/mod_glusterfs/lighttpd/1.4/Makefile.am b/mod_glusterfs/lighttpd/1.4/Makefile.am
new file mode 100644
index 00000000000..eda329111dc
--- /dev/null
+++ b/mod_glusterfs/lighttpd/1.4/Makefile.am
@@ -0,0 +1,3 @@
+EXTRA_DIST = Makefile.am.diff mod_glusterfs.c mod_glusterfs.h README.txt
+
+CLEANFILES = 
diff --git a/mod_glusterfs/lighttpd/1.4/Makefile.am.diff b/mod_glusterfs/lighttpd/1.4/Makefile.am.diff
new file mode 100644
index 00000000000..375696b5d8f
--- /dev/null
+++ b/mod_glusterfs/lighttpd/1.4/Makefile.am.diff
@@ -0,0 +1,29 @@
+--- lighttpd-1.4.19/src/Makefile.am	2008-04-16 18:42:18.000000000 +0400
++++ lighttpd-1.4.19.mod/src/Makefile.am	2008-04-16 18:41:11.000000000 +0400
+@@ -1,4 +1,4 @@
+-AM_CFLAGS = $(FAM_CFLAGS)
++AM_CFLAGS = $(FAM_CFLAGS)  -D_FILE_OFFSET_BITS=64 -D__USE_FILE_OFFSET64
+ 
+ noinst_PROGRAMS=proc_open lemon # simple-fcgi #graphic evalo bench ajp ssl error_test adserver gen-license
+ sbin_PROGRAMS=lighttpd lighttpd-angel
+@@ -241,6 +241,11 @@
+ mod_accesslog_la_LDFLAGS = -module -export-dynamic -avoid-version -no-undefined
+ mod_accesslog_la_LIBADD = $(common_libadd)
+ 
++lib_LTLIBRARIES += mod_glusterfs.la
++mod_glusterfs_la_SOURCES = mod_glusterfs.c
++mod_glusterfs_la_CFLAGS = $(AM_CFLAGS) 
++mod_glusterfs_la_LDFLAGS = -module -export-dynamic -avoid-version -no-undefined -lglusterfsclient -lpthread
++mod_glusterfs_la_LIBADD = $(common_libadd) 
+ 
+ hdr = server.h buffer.h network.h log.h keyvalue.h \
+       response.h request.h fastcgi.h chunk.h \
+@@ -254,7 +259,7 @@
+       configparser.h mod_ssi_exprparser.h \
+       sys-mmap.h sys-socket.h mod_cml.h mod_cml_funcs.h \
+       splaytree.h proc_open.h status_counter.h \
+-      mod_magnet_cache.h
++      mod_magnet_cache.h mod_glusterfs.h
+ 
+ DEFS= @DEFS@ -DLIBRARY_DIR="\"$(libdir)\"" -DSBIN_DIR="\"$(sbindir)\""
+ 
diff --git a/mod_glusterfs/lighttpd/1.4/README.txt b/mod_glusterfs/lighttpd/1.4/README.txt
new file mode 100644
index 00000000000..786a146e44d
--- /dev/null
+++ b/mod_glusterfs/lighttpd/1.4/README.txt
@@ -0,0 +1,57 @@
+Introduction
+============
+mod_glusterfs is a module written for lighttpd to speed up the access of files present on glusterfs. mod_glusterfs uses libglusterfsclient library provided for glusterfs and hence can be used without fuse (File System in User Space).
+
+Usage
+=====
+To use mod_glusterfs with lighttpd-1.4, copy mod_glusterfs.c and mod_glusterfs.h into src/ of lighttpd-1.4 source tree, and apply the Makefile.am.diff to src/Makefile.am. Re-run ./autogen.sh on the top level of the lighttpd-1.4 build tree and recompile.
+
+# cp mod_glusterfs.[ch] /home/glusterfs/lighttpd-1.4/src/
+# cp Makefile.am.diff /home/glusterfs/lighttpd-1.4/
+# cd /home/glusterfs/lighttpd-1.4
+# patch -p1 < Makefile.am.diff 
+# ./autogen.sh
+# ./configure
+# make
+# make install
+
+Configuration
+=============
+* mod_glusterfs should be listed at the begining of the list server.modules in lighttpd.conf. 
+
+Below is a snippet from lighttpd.conf concerning to mod_glusterfs.
+
+$HTTP["url"] =~ "^/glusterfs" {
+	glusterfs.prefix = "/glusterfs" 
+	glusterfs.document-root = "/home/glusterfs/document-root"
+	glusterfs.logfile = "/var/log/glusterfs-logfile"
+	glusterfs.volume-specfile = "/etc/glusterfs/glusterfs.vol"
+	glusterfs.loglevel = "error"
+	glusterfs.cache-timeout = 300
+	glusterfs.xattr-interface-size-limit = "65536"
+}
+
+* $HTTP["url"] =~ "^/glusterfs"
+  A perl style regular expression used to match against the url. If regular expression matches the url, the url is handled by mod_glusterfs. Note that the pattern given here should match glusterfs.prefix.
+
+* glusterfs.prefix (COMPULSORY)
+  A string to be present at the starting of the file path in the url so that the file would be handled by glusterfs.
+  Eg., A GET request on the url http://www.example.com/glusterfs-prefix/some-dir/example-file will result in fetching of the file "/some-dir/example-file" from glusterfs mount if glusterfs.prefix is set to "/glusterfs-prefix".
+
+* glusterfs.volume-specfile (COMPULSORY)
+  Path to the the glusterfs volume specification file.
+
+* glusterfs.logfile (COMPULSORY)
+  Path to the glusterfs logfile.
+
+* glusterfs.loglevel (OPTIONAL, default = warning)
+  Allowed values are critical, error, warning, debug, none in the decreasing order of severity of error conditions.
+
+* glusterfs.cache-timeout (OPTIONAL, default = 0)
+  Timeout values for glusterfs stat and lookup cache.
+
+* glusterfs.document-root (COMPULSORY)
+  An absolute path, relative to which all the files are fetched from glusterfs.
+
+* glusterfs.xattr-interface-size-limit (OPTIONAL, default = 0)
+  Files with sizes upto and including this value are fetched through the extended attribute interface of glusterfs rather than the usual open-read-close set of operations. For files of small sizes, it is recommended to use extended attribute interface.
diff --git a/mod_glusterfs/lighttpd/1.4/mod_glusterfs.c b/mod_glusterfs/lighttpd/1.4/mod_glusterfs.c
new file mode 100644
index 00000000000..9de33b7c437
--- /dev/null
+++ b/mod_glusterfs/lighttpd/1.4/mod_glusterfs.c
@@ -0,0 +1,1709 @@
+/*
+  Copyright (c) 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <pthread.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <unistd.h>
+#include <assert.h>
+
+#include "base.h"
+#include "log.h"
+#include "buffer.h"
+
+#include "plugin.h"
+
+#include "stat_cache.h"
+#include "mod_glusterfs.h"
+#include "etag.h"
+#include "http_chunk.h"
+#include "response.h"
+
+#include "fdevent.h"
+#include <libglusterfsclient.h>
+
+#ifdef HAVE_ATTR_ATTRIBUTES_H
+#include <attr/attributes.h>
+#endif
+
+#ifdef HAVE_FAM_H
+# include <fam.h>
+#endif
+
+#include "sys-mmap.h"
+
+/* NetBSD 1.3.x needs it */
+#ifndef MAP_FAILED
+# define MAP_FAILED -1
+#endif
+
+#ifndef O_LARGEFILE
+# define O_LARGEFILE 0
+#endif
+
+#ifndef HAVE_LSTAT
+#define lstat stat
+#endif
+
+#if 0
+/* enables debug code for testing if all nodes in the stat-cache as accessable */
+#define DEBUG_STAT_CACHE
+#endif
+
+#ifdef HAVE_LSTAT
+#undef HAVE_LSTAT
+#endif
+
+#define GLUSTERFS_FILE_CHUNK (FILE_CHUNK + 1)
+
+/* Keep this value large. Each glusterfs_async_read of GLUSTERFS_CHUNK_SIZE results in a network_backend_write of the read data*/
+
+#define GLUSTERFS_CHUNK_SIZE 8192
+
+/**
+ * this is a staticfile for a lighttpd plugin
+ *
+ */
+
+typedef struct glusterfs_async_local {
+        int op_ret;
+        int op_errno;
+        char async_read_complete;
+        off_t length;
+        size_t read_bytes;
+        glusterfs_read_buf_t *buf;
+        pthread_mutex_t lock;
+        pthread_cond_t cond;
+} glusterfs_async_local_t;
+
+
+typedef struct {
+        unsigned long fd;
+        void *buf;
+        buffer *glusterfs_path;
+        /*  off_t response_content_length; */
+        int prefix;
+}mod_glusterfs_ctx_t;
+
+/* plugin config for all request/connections */
+typedef struct {
+        buffer *logfile;
+        buffer *loglevel;
+        buffer *specfile;
+        buffer *prefix;
+        buffer *xattr_file_size;
+        buffer *document_root;
+        array *exclude_exts;
+        unsigned short cache_timeout;
+
+        /* FIXME: its a pointer, hence cant be short */
+        unsigned long handle;
+} plugin_config;
+
+static int (*network_backend_write)(struct server *srv, connection *con, int fd, chunkqueue *cq);
+
+typedef struct {
+        PLUGIN_DATA;
+        buffer *range_buf;
+        plugin_config **config_storage;
+  
+        plugin_config conf;
+} plugin_data;
+
+typedef struct {
+        chunkqueue *cq;
+        glusterfs_read_buf_t *buf;
+        size_t length;
+}mod_glusterfs_chunkqueue;
+
+#ifdef HAVE_FAM_H
+typedef struct {
+        FAMRequest *req;
+        FAMConnection *fc;
+
+        buffer *name;
+
+        int version;
+} fam_dir_entry;
+#endif
+
+/* the directory name is too long to always compare on it
+ * - we need a hash
+ * - the hash-key is used as sorting criteria for a tree
+ * - a splay-tree is used as we can use the caching effect of it
+ */
+
+/* we want to cleanup the stat-cache every few seconds, let's say 10
+ *
+ * - remove entries which are outdated since 30s
+ * - remove entries which are fresh but havn't been used since 60s
+ * - if we don't have a stat-cache entry for a directory, release it from the monitor
+ */
+
+#ifdef DEBUG_STAT_CACHE
+typedef struct {
+        int *ptr;
+
+        size_t used;
+        size_t size;
+} fake_keys;
+
+static fake_keys ctrl;
+#endif
+
+int 
+mod_glusterfs_readv_async_cbk (glusterfs_read_buf_t *buf,
+                               void *cbk_data)
+{
+        glusterfs_async_local_t *local = cbk_data;
+        pthread_mutex_lock (&local->lock);
+        {
+                local->async_read_complete = 1;
+                local->buf = buf;
+
+                pthread_cond_signal (&local->cond);
+        }
+        pthread_mutex_unlock (&local->lock);
+
+        return 0;
+}
+
+static int
+mod_glusterfs_read_async (server *srv, connection *con, chunk *glusterfs_chunk)
+{
+        glusterfs_async_local_t local;
+        off_t end = 0;
+        int nbytes;
+        int complete;
+        chunkqueue *cq = NULL;
+        chunk *c = NULL;
+        off_t offset = glusterfs_chunk->file.start;
+        size_t length = glusterfs_chunk->file.length;
+        long fd = (long)glusterfs_chunk->file.name;
+
+        pthread_cond_init (&local.cond, NULL);
+        pthread_mutex_init (&local.lock, NULL);
+  
+        //local.fd = fd;
+        memset (&local, 0, sizeof (local));
+
+        if (length > 0)
+                end = offset + length;
+
+        cq = chunkqueue_init ();
+        if (!cq) {
+                con->http_status = 500;
+                return HANDLER_FINISHED;
+        }
+
+        do {
+                glusterfs_read_buf_t *buf;
+                int i;
+                if (length > 0) {
+                        nbytes = end - offset;
+                        if (nbytes > GLUSTERFS_CHUNK_SIZE)
+                                nbytes = GLUSTERFS_CHUNK_SIZE;
+                } else
+                        nbytes = GLUSTERFS_CHUNK_SIZE;
+
+                glusterfs_read_async(fd, 
+                                     nbytes,
+                                     offset,
+                                     mod_glusterfs_readv_async_cbk,
+                                     (void *)&local);
+
+                pthread_mutex_lock (&local.lock);
+                {
+                        while (!local.async_read_complete) {
+                                pthread_cond_wait (&local.cond, &local.lock);
+                        }
+
+                        local.op_ret = local.buf->op_ret;
+                        local.op_errno = local.buf->op_errno;
+
+                        local.async_read_complete = 0;
+                        buf = local.buf;
+
+                        if ((int)length < 0)
+                                complete = (local.buf->op_ret <= 0);
+                        else {
+                                local.read_bytes += local.buf->op_ret;
+                                complete = ((local.read_bytes == length) || (local.buf->op_ret <= 0));
+                        }
+                }
+                pthread_mutex_unlock (&local.lock);
+
+                if (local.op_ret > 0) {
+                        unsigned long check = 0;
+                        for (i = 0; i < buf->count; i++) {
+                                buffer *nw_write_buf = buffer_init ();
+
+                                check += buf->vector[i].iov_len;        
+
+                                nw_write_buf->used = nw_write_buf->size = buf->vector[i].iov_len + 1;
+                                nw_write_buf->ptr = buf->vector[i].iov_base;
+
+                                //      buffer_copy_memory (nw_write_buf, buf->vector[i].iov_base, buf->vector[i].iov_len + 1);
+                                offset += local.op_ret;
+                                chunkqueue_append_buffer_weak (cq, nw_write_buf);
+                        }
+  
+                        network_backend_write (srv, con, con->fd, cq);
+  
+                        if (chunkqueue_written (cq) != local.op_ret) {
+                                mod_glusterfs_chunkqueue *gf_cq;
+                                glusterfs_chunk->file.start = offset;
+                                if ((int)glusterfs_chunk->file.length > 0)
+                                        glusterfs_chunk->file.length -= local.read_bytes;
+
+                                gf_cq = calloc (1, sizeof (*gf_cq));
+                                /* ERR_ABORT (gf_cq); */
+                                gf_cq->cq = cq;
+                                gf_cq->buf = buf;
+                                gf_cq->length = local.op_ret;
+                                glusterfs_chunk->file.mmap.start = (char *)gf_cq;
+                                return local.read_bytes;
+                        }
+      
+                        for (c = cq->first ; c; c = c->next) 
+                                c->mem->ptr = NULL;
+
+                        chunkqueue_reset (cq);
+                }
+
+                glusterfs_free (buf);
+        } while (!complete);
+
+        chunkqueue_free (cq);
+        glusterfs_close (fd);
+
+        if (local.op_ret < 0)
+                con->http_status = 500;
+
+        return (local.op_ret < 0 ? HANDLER_FINISHED : HANDLER_GO_ON);
+}
+
+int mod_glusterfs_network_backend_write(struct server *srv, connection *con, int fd, chunkqueue *cq)
+{
+        chunk *c, *prev, *first;
+        int chunks_written = 0;
+        int error = 0;
+
+        for (first = prev = c = cq->first; c; c = c->next, chunks_written++) {
+
+                if (c->type == MEM_CHUNK && c->mem->used && !c->mem->ptr) {
+                        if (cq->first != c) {
+                                prev->next = NULL;
+
+                                /* call stored network_backend_write */
+                                network_backend_write (srv, con, fd, cq);
+
+                                prev->next = c;
+                        } 
+                        cq->first = c->next;
+
+                        if (c->file.fd < 0) {
+                                error = HANDLER_ERROR;
+                                break;
+                        }
+
+                        if (c->file.mmap.start) {
+                                chunk *tmp;
+                                mod_glusterfs_chunkqueue *gf_cq = (mod_glusterfs_chunkqueue *)c->file.mmap.start;
+
+                                network_backend_write (srv, con, fd, gf_cq->cq);
+
+                                if ((size_t)chunkqueue_written (gf_cq->cq) != gf_cq->length) {
+                                        cq->first = first;
+                                        return chunks_written;
+                                }
+                                for (tmp = gf_cq->cq->first ; tmp; tmp = tmp->next)
+                                        tmp->mem->ptr = NULL;
+
+                                chunkqueue_free (gf_cq->cq);
+                                glusterfs_free (gf_cq->buf);
+                                free (gf_cq);
+                                c->file.mmap.start = NULL;
+                        }
+      
+                        mod_glusterfs_read_async (srv, con, c); //c->file.fd, c->file.start, -1);//c->file.length);
+                        if (c->file.mmap.start) {
+                                /* pending chunkqueue from mod_glusterfs_read_async to be written to network */
+                                cq->first = first;
+                                return chunks_written;
+                        }
+
+                        buffer_free (c->mem);
+                        c->mem = NULL;
+
+                        c->type = FILE_CHUNK;
+                        c->offset = c->file.length = 0;
+                        c->file.name = NULL;
+
+                        if (first == c)
+                                first = c->next;
+
+                        if (cq->last == c)
+                                cq->last = NULL;
+
+                        prev->next = c->next;
+
+                        free(c);
+                }     
+                prev = c;
+        }
+
+        network_backend_write (srv, con, fd, cq);
+
+        cq->first = first;
+
+        return chunks_written;
+}
+
+int chunkqueue_append_glusterfs_file (connection *con, long fd, off_t offset, off_t len)
+{
+        chunk *c = NULL;
+        c = chunkqueue_get_append_tempfile (con->write_queue);
+  
+        if (c->file.is_temp) {
+                close (c->file.fd);
+                unlink (c->file.name->ptr);
+        }
+
+        c->type = MEM_CHUNK;
+
+        c->mem = buffer_init ();
+        c->mem->used = len + 1;
+        c->mem->ptr = NULL;
+        c->offset = 0;
+
+        /*  buffer_copy_string_buffer (c->file.name, fn); */
+        buffer_free (c->file.name);
+
+        /* fd returned by libglusterfsclient is a pointer */
+        c->file.name = (buffer *)fd;
+        c->file.start = offset;
+        c->file.length = len;
+
+        //c->file.fd = fd;
+        c->file.mmap.start = NULL;
+        return 0;
+}
+
+/* init the plugin data */
+INIT_FUNC(mod_glusterfs_init) {
+        plugin_data *p;
+
+        p = calloc(1, sizeof(*p));
+        /* ERR_ABORT (p); */
+        network_backend_write = NULL;
+
+        return p;
+}
+
+/* detroy the plugin data */
+FREE_FUNC(mod_glusterfs_free) {
+        plugin_data *p = p_d;
+
+        UNUSED (srv);
+
+        if (!p) return HANDLER_GO_ON;
+  
+        if (p->config_storage) {
+                size_t i;
+                for (i = 0; i < srv->config_context->used; i++) {
+                        plugin_config *s = p->config_storage[i];
+      
+                        buffer_free (s->logfile);
+                        buffer_free (s->loglevel);
+                        buffer_free (s->specfile);
+                        buffer_free (s->prefix);
+                        buffer_free (s->xattr_file_size);
+                        buffer_free (s->document_root);
+                        array_free (s->exclude_exts);
+  
+                        free (s);
+                }
+                free (p->config_storage);
+        }
+        buffer_free (p->range_buf);
+
+        free (p);
+  
+        return HANDLER_GO_ON;
+}
+
+SETDEFAULTS_FUNC(mod_glusterfs_set_defaults) {
+        plugin_data *p = p_d;
+        size_t i = 0;
+  
+        config_values_t cv[] = {
+                { "glusterfs.logfile",              NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
+    
+                { "glusterfs.loglevel",             NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },    
+
+                { "glusterfs.volume-specfile",      NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, 
+
+                { "glusterfs.cache-timeout",        NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION },
+    
+                { "glusterfs.exclude-extensions",   NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION },
+    
+                /*TODO: get the prefix from config_conext and remove glusterfs.prefix from conf file */
+                { "glusterfs.prefix",               NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
+    
+                { "glusterfs.xattr-interface-size-limit", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
+
+                { "glusterfs.document-root",        NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
+    
+                { NULL,                          NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
+        };
+  
+        p->config_storage = calloc(1, srv->config_context->used * sizeof(specific_config *));
+        /* ERR_ABORT (p->config_storage);*/
+        p->range_buf = buffer_init ();
+  
+        for (i = 0; i < srv->config_context->used; i++) {
+                plugin_config *s;
+
+                s = calloc(1, sizeof(plugin_config));
+                /* ERR_ABORT (s); */
+                s->logfile = buffer_init ();
+                s->loglevel = buffer_init ();
+                s->specfile = buffer_init ();
+                s->document_root = buffer_init ();
+                s->exclude_exts = array_init ();
+                s->prefix = buffer_init ();
+                s->xattr_file_size = buffer_init ();
+    
+                cv[0].destination = s->logfile;
+                cv[1].destination = s->loglevel;
+                cv[2].destination = s->specfile;
+                cv[3].destination = &s->cache_timeout;
+                cv[4].destination = s->exclude_exts;
+                cv[5].destination = s->prefix;
+                cv[6].destination = s->xattr_file_size;
+                cv[7].destination = s->document_root;
+                p->config_storage[i] = s;
+    
+                if (0 != config_insert_values_global(srv, ((data_config *)srv->config_context->data[i])->value, cv)) {
+                        return HANDLER_FINISHED;
+                }
+        }
+  
+        return HANDLER_GO_ON;
+}
+
+#define PATCH(x)                                \
+        p->conf.x = s->x;
+
+static int mod_glusterfs_patch_connection(server *srv, connection *con, plugin_data *p) {
+        size_t i, j;
+        plugin_config *s;
+
+        /* skip the first, the global context */
+        /* glusterfs related config can only occur inside $HTTP["url"] == "<glusterfs-prefix>" */
+        p->conf.logfile = NULL;
+        p->conf.loglevel = NULL;
+        p->conf.specfile = NULL;
+        p->conf.cache_timeout = 0;
+        p->conf.exclude_exts = NULL;
+        p->conf.prefix = NULL;
+        p->conf.xattr_file_size = NULL;
+        p->conf.document_root = NULL;
+
+        for (i = 1; i < srv->config_context->used; i++) {
+                data_config *dc = (data_config *)srv->config_context->data[i];
+                s = p->config_storage[i];
+
+                /* condition didn't match */
+                if (!config_check_cond(srv, con, dc)) continue;
+    
+                /* merge config */
+                for (j = 0; j < dc->value->used; j++) {
+                        data_unset *du = dc->value->data[j];
+      
+                        if (buffer_is_equal_string (du->key, CONST_STR_LEN("glusterfs.logfile"))) {
+                                PATCH (logfile);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN("glusterfs.loglevel"))) {
+                                PATCH (loglevel);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN ("glusterfs.volume-specfile"))) {
+                                PATCH (specfile);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN("glusterfs.cache-timeout"))) {
+                                PATCH (cache_timeout);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN ("glusterfs.exclude-extensions"))) {
+                                PATCH (exclude_exts);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN ("glusterfs.prefix"))) {
+                                PATCH (prefix);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN ("glusterfs.xattr-interface-size-limit"))) {
+                                PATCH (xattr_file_size);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN ("glusterfs.document-root"))) {
+                                PATCH (document_root);
+                        }
+                }
+        }
+        return 0;
+}
+
+#undef PATCH
+
+static int http_response_parse_range(server *srv, connection *con, plugin_data *p) {
+        int multipart = 0;
+        int error;
+        off_t start, end;
+        const char *s, *minus;
+        char *boundary = "fkj49sn38dcn3";
+        data_string *ds;
+        stat_cache_entry *sce = NULL;
+        buffer *content_type = NULL;
+        size_t size = 0;
+        mod_glusterfs_ctx_t *ctx = con->plugin_ctx[p->id];
+
+        if (p->conf.xattr_file_size && p->conf.xattr_file_size->ptr) {
+                size = atoi (p->conf.xattr_file_size->ptr);
+        }
+
+        if (HANDLER_ERROR == stat_cache_get_entry(srv, con, con->physical.path, &sce)) {
+                SEGFAULT();
+        }
+  
+        start = 0;
+        end = sce->st.st_size - 1;
+  
+        con->response.content_length = 0;
+  
+        if (NULL != (ds = (data_string *)array_get_element(con->response.headers, "Content-Type"))) {
+                content_type = ds->value;
+        }
+  
+        for (s = con->request.http_range, error = 0;
+             !error && *s && NULL != (minus = strchr(s, '-')); ) {
+                char *err;
+                off_t la, le;
+    
+                if (s == minus) {
+                        /* -<stop> */
+      
+                        le = strtoll(s, &err, 10);
+      
+                        if (le == 0) {
+                                /* RFC 2616 - 14.35.1 */
+        
+                                con->http_status = 416;
+                                error = 1;
+                        } else if (*err == '\0') {
+                                /* end */
+                                s = err;
+        
+                                end = sce->st.st_size - 1;
+                                start = sce->st.st_size + le;
+                        } else if (*err == ',') {
+                                multipart = 1;
+                                s = err + 1;
+        
+                                end = sce->st.st_size - 1;
+                                start = sce->st.st_size + le;
+                        } else {
+                                error = 1;
+                        }
+      
+                } else if (*(minus+1) == '\0' || *(minus+1) == ',') {
+                        /* <start>- */
+      
+                        la = strtoll(s, &err, 10);
+      
+                        if (err == minus) {
+                                /* ok */
+        
+                                if (*(err + 1) == '\0') {
+                                        s = err + 1;
+          
+                                        end = sce->st.st_size - 1;
+                                        start = la;
+          
+                                } else if (*(err + 1) == ',') {
+                                        multipart = 1;
+                                        s = err + 2;
+          
+                                        end = sce->st.st_size - 1;
+                                        start = la;
+                                } else {
+                                        error = 1;
+                                }
+                        } else {
+                                /* error */
+                                error = 1;
+                        }
+                } else {
+                        /* <start>-<stop> */
+      
+                        la = strtoll(s, &err, 10);
+
+                        if (err == minus) {
+                                le = strtoll(minus+1, &err, 10);
+        
+                                /* RFC 2616 - 14.35.1 */
+                                if (la > le) {
+                                        error = 1;
+                                }
+        
+                                if (*err == '\0') {
+                                        /* ok, end*/
+                                        s = err;
+
+                                        end = le;
+                                        start = la;
+                                } else if (*err == ',') {
+                                        multipart = 1;
+                                        s = err + 1;
+          
+                                        end = le;
+                                        start = la;
+                                } else {
+                                        /* error */
+          
+                                        error = 1;
+                                }
+                        } else {
+                                /* error */
+        
+                                error = 1;
+                        }
+                }
+    
+                if (!error) {
+                        if (start < 0) start = 0;
+      
+                        /* RFC 2616 - 14.35.1 */
+                        if (end > sce->st.st_size - 1) end = sce->st.st_size - 1;
+      
+                        if (start > sce->st.st_size - 1) {
+                                error = 1;
+        
+                                con->http_status = 416;
+                        }
+                }
+    
+                if (!error) {
+                        if (multipart) {
+                                /* write boundary-header */
+                                buffer *b;
+        
+                                b = chunkqueue_get_append_buffer(con->write_queue);
+        
+                                buffer_copy_string(b, "\r\n--");
+                                buffer_append_string(b, boundary);
+        
+                                /* write Content-Range */
+                                buffer_append_string(b, "\r\nContent-Range: bytes ");
+                                buffer_append_off_t(b, start);
+                                buffer_append_string(b, "-");
+                                buffer_append_off_t(b, end);
+                                buffer_append_string(b, "/");
+                                buffer_append_off_t(b, sce->st.st_size);
+        
+                                buffer_append_string(b, "\r\nContent-Type: ");
+                                buffer_append_string_buffer(b, content_type);
+        
+                                /* write END-OF-HEADER */
+                                buffer_append_string(b, "\r\n\r\n");
+        
+                                con->response.content_length += b->used - 1;
+
+                        }
+
+                        /* path = con->physical.path->ptr + p->conf.prefix->used - 1 + con->physical.doc_root->used - 1;      */
+                        /*
+                          fd = glusterfs_open (p->conf.handle, path, O_RDONLY);
+                          if (fd < 0)
+                          return HANDLER_ERROR;
+                        */
+                        /*      fn = buffer_init_string (path); */
+                        if ((size_t)sce->st.st_size > size) {
+                                chunkqueue_append_glusterfs_file(con, ctx->fd, start, end - start + 1);
+                        } else {
+                                if (!start) {
+                                        buffer *mem = buffer_init ();
+                                        mem->ptr = ctx->buf;
+                                        mem->used = mem->size = sce->st.st_size + 1;
+                                        http_chunk_append_buffer (srv, con, mem);
+                                        ctx->buf = NULL;
+                                } else {
+                                        chunkqueue_append_mem (con->write_queue, ((char *)ctx->buf) + start, end - start + 1); 
+                                }
+                        }
+
+                        con->response.content_length += end - start + 1;
+                }
+        }
+
+        if (ctx->buf) {
+                free (ctx->buf);
+                ctx->buf = NULL;
+        }
+
+        /* something went wrong */
+        if (error) return -1;
+  
+        if (multipart) {
+                /* add boundary end */
+                buffer *b;
+    
+                b = chunkqueue_get_append_buffer(con->write_queue);
+    
+                buffer_copy_string_len(b, "\r\n--", 4);
+                buffer_append_string(b, boundary);
+                buffer_append_string_len(b, "--\r\n", 4);
+    
+                con->response.content_length += b->used - 1;
+    
+                /* set header-fields */
+
+                buffer_copy_string(p->range_buf, "multipart/byteranges; boundary=");
+                buffer_append_string(p->range_buf, boundary);
+
+                /* overwrite content-type */
+                response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_BUF_LEN(p->range_buf));
+        } else {
+                /* add Content-Range-header */
+    
+                buffer_copy_string(p->range_buf, "bytes ");
+                buffer_append_off_t(p->range_buf, start);
+                buffer_append_string(p->range_buf, "-");
+                buffer_append_off_t(p->range_buf, end);
+                buffer_append_string(p->range_buf, "/");
+                buffer_append_off_t(p->range_buf, sce->st.st_size);
+    
+                response_header_insert(srv, con, CONST_STR_LEN("Content-Range"), CONST_BUF_LEN(p->range_buf));
+        }
+        
+        /* ok, the file is set-up */
+        return 0;
+}
+
+PHYSICALPATH_FUNC(mod_glusterfs_handle_physical) {
+        plugin_data *p = p_d;
+        stat_cache_entry *sce;
+        mod_glusterfs_ctx_t *plugin_ctx = NULL;
+        size_t size = 0;
+
+        if (con->http_status != 0) return HANDLER_GO_ON;
+        if (con->uri.path->used == 0) return HANDLER_GO_ON;
+        if (con->physical.path->used == 0) return HANDLER_GO_ON;
+
+        if (con->mode != DIRECT) return HANDLER_GO_ON;
+
+        /*
+          network_backend_write = srv->network_backend_write;
+          srv->network_backend_write = mod_glusterfs_network_backend_write;
+        */
+
+        switch (con->request.http_method) {
+        case HTTP_METHOD_GET:
+        case HTTP_METHOD_POST:
+        case HTTP_METHOD_HEAD:
+                break;
+
+        default:
+                return HANDLER_GO_ON;
+        }
+
+        mod_glusterfs_patch_connection(srv, con, p);
+        if (!p->conf.prefix || p->conf.prefix->used == 0) {
+                return HANDLER_GO_ON;
+        }
+
+        if (!p->conf.document_root || p->conf.document_root->used == 0) {
+                log_error_write(srv, __FILE__, __LINE__, "s", "glusterfs.document-root is not specified");
+                con->http_status = 500;
+                return HANDLER_FINISHED;
+        }
+
+        if (p->conf.handle <= 0) {
+                glusterfs_init_ctx_t ctx;
+
+                if (!p->conf.specfile || p->conf.specfile->used == 0) {
+                        return HANDLER_GO_ON;
+                }
+                memset (&ctx, 0, sizeof (ctx));
+
+                ctx.specfile = p->conf.specfile->ptr;
+                ctx.logfile = p->conf.logfile->ptr;
+                ctx.loglevel = p->conf.loglevel->ptr;
+                ctx.lookup_timeout = ctx.stat_timeout = p->conf.cache_timeout;
+
+                p->conf.handle = (long)glusterfs_init (&ctx);
+
+                if (p->conf.handle <= 0) {
+                        con->http_status = 500;
+                        log_error_write(srv, __FILE__, __LINE__,  "sbs",  "glusterfs initialization failed, please check your configuration. Glusterfs logfile ", p->conf.logfile, "might contain details");
+                        return HANDLER_FINISHED;
+                }
+        }
+
+        size = 0;
+        if (p->conf.xattr_file_size && p->conf.xattr_file_size->ptr) 
+                size = atoi (p->conf.xattr_file_size->ptr);
+
+        if (!con->plugin_ctx[p->id]) {
+/* FIXME: what if multiple files are requested from a single connection? */ 
+/* TODO: check whether this works fine for HTTP protocol 1.1 */
+
+                buffer *tmp_buf = buffer_init_buffer (con->physical.basedir);
+
+                plugin_ctx = calloc (1, sizeof (*plugin_ctx));
+                /* ERR_ABORT (plugin_ctx); */
+                con->plugin_ctx[p->id] = plugin_ctx;
+    
+                buffer_append_string_buffer (tmp_buf, p->conf.prefix);
+                buffer_path_simplify (tmp_buf, tmp_buf);
+
+                plugin_ctx->prefix = tmp_buf->used - 1;
+                if (tmp_buf->ptr[plugin_ctx->prefix - 1] == '/')
+                        plugin_ctx->prefix--;
+
+                buffer_free (tmp_buf);
+        } else 
+                /*FIXME: error!! error!! */
+                plugin_ctx = con->plugin_ctx[p->id];
+
+
+        if (size) 
+        {
+                plugin_ctx->buf = MALLOC (size);
+                /* ERR_ABORT (plugin_ctx->buf); */
+        }
+
+        plugin_ctx->glusterfs_path = buffer_init ();
+        buffer_copy_string_buffer (plugin_ctx->glusterfs_path, p->conf.document_root);
+        buffer_append_string (plugin_ctx->glusterfs_path, "/");
+        buffer_append_string (plugin_ctx->glusterfs_path, con->physical.path->ptr + plugin_ctx->prefix);
+        buffer_path_simplify (plugin_ctx->glusterfs_path, plugin_ctx->glusterfs_path);
+ 
+        if (glusterfs_stat_cache_get_entry (srv, con, (libglusterfs_handle_t )p->conf.handle, plugin_ctx->glusterfs_path, con->physical.path, plugin_ctx->buf, size, &sce) == HANDLER_ERROR) {
+                if (errno == ENOENT)
+                        con->http_status = 404;
+                else 
+                        con->http_status = 403;
+
+                free (plugin_ctx->buf);
+                buffer_free (plugin_ctx->glusterfs_path);
+                plugin_ctx->glusterfs_path = NULL;
+                plugin_ctx->buf = NULL;
+
+                free (plugin_ctx);
+                con->plugin_ctx[p->id] = NULL;
+
+                return HANDLER_FINISHED;
+        }
+
+        if (!(S_ISREG (sce->st.st_mode) && (size_t)sce->st.st_size <= size)) {
+                free (plugin_ctx->buf);
+                plugin_ctx->buf = NULL;
+        }
+
+        return HANDLER_GO_ON;
+}
+
+static int http_chunk_append_len(server *srv, connection *con, size_t len) {
+        size_t i, olen = len, j;
+        buffer *b;
+
+        b = srv->tmp_chunk_len;
+
+        if (len == 0) {
+                buffer_copy_string(b, "0");
+        } else {
+                for (i = 0; i < 8 && len; i++) {
+                        len >>= 4;
+                }
+    
+                /* i is the number of hex digits we have */
+                buffer_prepare_copy(b, i + 1);
+    
+                for (j = i-1, len = olen; j+1 > 0; j--) {
+                        b->ptr[j] = (len & 0xf) + (((len & 0xf) <= 9) ? '0' : 'a' - 10);
+                        len >>= 4;
+                }
+                b->used = i;
+                b->ptr[b->used++] = '\0';
+        }
+  
+        buffer_append_string(b, "\r\n");
+        chunkqueue_append_buffer(con->write_queue, b);
+  
+        return 0;
+}
+
+int http_chunk_append_glusterfs_file_chunk(server *srv, connection *con, long fd, off_t offset, off_t len) {
+        chunkqueue *cq;
+
+        if (!con) return -1;
+
+        cq = con->write_queue;
+
+        if (con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED) {
+                http_chunk_append_len(srv, con, len);
+        }
+
+        chunkqueue_append_glusterfs_file (con, fd, offset, len);
+
+        if (con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED && len > 0) {
+                chunkqueue_append_mem(cq, "\r\n", 2 + 1);
+        }
+
+        return 0;
+}
+
+int http_chunk_append_glusterfs_mem(server *srv, connection *con, const char * mem, size_t len) {
+        chunkqueue *cq = NULL;
+        buffer *buf = NULL;
+ 
+        if (!con) return -1;
+  
+        cq = con->write_queue;
+  
+        if (len == 0) {
+                if (con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED) {
+                        chunkqueue_append_mem(cq, "0\r\n\r\n", 5 + 1);
+                } else {
+                        chunkqueue_append_mem(cq, "", 1);
+                }
+                return 0;
+        }
+
+        if (con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED) {
+                http_chunk_append_len(srv, con, len - 1);
+        }
+  
+        buf = buffer_init ();
+
+        buf->used = len + 1;
+        buf->ptr = (char *)mem;
+        chunkqueue_append_buffer_weak (cq, buf);
+
+        if (con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED) {
+                chunkqueue_append_mem(cq, "\r\n", 2 + 1);
+        }
+
+        return 0;
+}
+
+
+
+URIHANDLER_FUNC(mod_glusterfs_subrequest) {
+        plugin_data *p = p_d;
+        stat_cache_entry *sce = NULL;
+        int s_len;
+        char allow_caching = 1;
+        size_t size = 0;
+        mod_glusterfs_ctx_t *ctx = con->plugin_ctx[p->id];
+
+        /* someone else has done a decision for us */
+        if (con->http_status != 0) return HANDLER_GO_ON;
+        if (con->uri.path->used == 0) return HANDLER_GO_ON;
+        if (con->physical.path->used == 0) return HANDLER_GO_ON;
+  
+        /* someone else has handled this request */
+        if (con->mode != DIRECT) return HANDLER_GO_ON;
+  
+        /* we only handle GET, POST and HEAD */
+        switch(con->request.http_method) {
+        case HTTP_METHOD_GET:
+        case HTTP_METHOD_POST:
+        case HTTP_METHOD_HEAD:
+                break;
+        default:
+                return HANDLER_GO_ON;
+        }
+  
+        mod_glusterfs_patch_connection(srv, con, p);
+  
+        if (!p->conf.prefix || !p->conf.prefix->used)
+                return HANDLER_GO_ON;
+
+        s_len = con->uri.path->used - 1;
+        /* ignore certain extensions */
+        /*
+          for (k = 0; k < p->conf.exclude_exts->used; k++) {
+          data_string *ds;
+          ds = (data_string *)p->conf.exclude_exts->data[k];
+          
+          if (ds->value->used == 0) continue;
+    
+          if (!strncmp (ds->value->ptr, con->uri.path->ptr, strlen (ds->value->ptr)))
+          break;
+          }
+  
+          if (k == p->conf.exclude_exts->used) {
+          return HANDLER_GO_ON;
+          }
+        */
+
+        if (con->conf.log_request_handling) {
+                log_error_write(srv, __FILE__, __LINE__,  "s",  "-- serving file from glusterfs");
+        }
+
+        if (HANDLER_ERROR == stat_cache_get_entry(srv, con, con->physical.path, &sce)) {
+                con->http_status = 403;
+                
+                log_error_write(srv, __FILE__, __LINE__, "sbsb",
+                                "not a regular file:", con->uri.path,
+                                "->", con->physical.path);
+    
+                free (ctx);
+                con->plugin_ctx[p->id] = NULL;
+
+                return HANDLER_FINISHED;
+        }
+
+        if (con->uri.path->ptr[s_len] == '/' || !S_ISREG(sce->st.st_mode)) {
+                free (ctx);
+                con->plugin_ctx[p->id] = NULL;
+                return HANDLER_FINISHED;
+        }
+
+        if (p->conf.xattr_file_size && p->conf.xattr_file_size->ptr)
+                size = atoi (p->conf.xattr_file_size->ptr);
+
+        if ((size_t)sce->st.st_size > size) {
+                ctx->fd = glusterfs_open ((libglusterfs_handle_t ) ((unsigned long)p->conf.handle), ctx->glusterfs_path->ptr, O_RDONLY, 0);
+    
+                if (((long)ctx->fd) == 0) {
+                        con->http_status = 403;
+                        free (ctx);
+                        con->plugin_ctx[p->id] = NULL;
+                        return HANDLER_FINISHED;
+                }
+        }
+
+        buffer_free (ctx->glusterfs_path);
+        ctx->glusterfs_path = NULL;
+
+        /* we only handline regular files */
+#ifdef HAVE_LSTAT
+        if ((sce->is_symlink == 1) && !con->conf.follow_symlink) {
+                con->http_status = 403;
+          
+                if (con->conf.log_request_handling) {
+                        log_error_write(srv, __FILE__, __LINE__,  "s",  "-- access denied due symlink restriction");
+                        log_error_write(srv, __FILE__, __LINE__,  "sb", "Path         :", con->physical.path);
+                }
+    
+                buffer_reset(con->physical.path);
+                free (ctx);
+                con->plugin_ctx[p->id] = NULL;
+                return HANDLER_FINISHED;
+        }
+#endif
+        if (!S_ISREG(sce->st.st_mode)) {
+                con->http_status = 404;
+    
+                if (con->conf.log_file_not_found) {
+                        log_error_write(srv, __FILE__, __LINE__, "sbsb",
+                                        "not a regular file:", con->uri.path,
+                                        "->", sce->name);
+                }
+    
+                free (ctx);
+                con->plugin_ctx[p->id] = NULL;
+
+                return HANDLER_FINISHED;
+        }
+
+        /* mod_compress might set several data directly, don't overwrite them */
+
+        /* set response content-type, if not set already */
+  
+        if (NULL == array_get_element(con->response.headers, "Content-Type")) {
+                if (buffer_is_empty(sce->content_type)) {
+                        /* we are setting application/octet-stream, but also announce that
+                         * this header field might change in the seconds few requests 
+                         *
+                         * This should fix the aggressive caching of FF and the script download
+                         * seen by the first installations
+                         */
+                        response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("application/octet-stream"));
+      
+                        allow_caching = 0;
+                } else {
+                        response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_BUF_LEN(sce->content_type));
+                }
+        }
+  
+        if (con->conf.range_requests) {
+                response_header_overwrite(srv, con, CONST_STR_LEN("Accept-Ranges"), CONST_STR_LEN("bytes"));
+        }
+
+        /* TODO: Allow Cachable requests */     
+#if 0
+        if (allow_caching) {
+                if (p->conf.etags_used && con->etag_flags != 0 && !buffer_is_empty(sce->etag)) {
+                        if (NULL == array_get_element(con->response.headers, "ETag")) {
+                                /* generate e-tag */
+                                etag_mutate(con->physical.etag, sce->etag);
+        
+                                response_header_overwrite(srv, con, CONST_STR_LEN("ETag"), CONST_BUF_LEN(con->physical.etag));
+                        }
+                }
+    
+                /* prepare header */
+                if (NULL == (ds = (data_string *)array_get_element(con->response.headers, "Last-Modified"))) {
+                        mtime = strftime_cache_get(srv, sce->st.st_mtime);
+                        response_header_overwrite(srv, con, CONST_STR_LEN("Last-Modified"), CONST_BUF_LEN(mtime));
+                } else {
+                        mtime = ds->value;
+                }
+    
+                if (HANDLER_FINISHED == http_response_handle_cachable(srv, con, mtime)) {
+                        free (ctx);
+                        con->plugin_ctx[p->id] = NULL;
+                        return HANDLER_FINISHED;
+                }
+        }
+#endif 
+  
+        /*TODO: Read about etags */
+        if (con->request.http_range && con->conf.range_requests) {
+                int do_range_request = 1;
+                data_string *ds = NULL;
+                buffer *mtime = NULL;
+                /* check if we have a conditional GET */
+    
+                /* prepare header */
+                if (NULL == (ds = (data_string *)array_get_element(con->response.headers, "Last-Modified"))) {
+                        mtime = strftime_cache_get(srv, sce->st.st_mtime);
+                        response_header_overwrite(srv, con, CONST_STR_LEN("Last-Modified"), CONST_BUF_LEN(mtime));
+                } else {
+                        mtime = ds->value;
+                }
+
+                if (NULL != (ds = (data_string *)array_get_element(con->request.headers, "If-Range"))) {
+                        /* if the value is the same as our ETag, we do a Range-request,
+                         * otherwise a full 200 */
+            
+                        if (ds->value->ptr[0] == '"') {
+                                /**
+                                 * client wants a ETag
+                                 */
+                                if (!con->physical.etag) {
+                                        do_range_request = 0;
+                                } else if (!buffer_is_equal(ds->value, con->physical.etag)) {
+                                        do_range_request = 0;
+                                }
+                        } else if (!mtime) {
+                                /**
+                                 * we don't have a Last-Modified and can match the If-Range: 
+                                 *
+                                 * sending all
+                                 */
+                                do_range_request = 0;
+                        } else if (!buffer_is_equal(ds->value, mtime)) {
+                                do_range_request = 0;
+                        }
+                }
+    
+                if (do_range_request) {
+                        /* content prepared, I'm done */
+                        con->file_finished = 1;
+            
+                        if (0 == http_response_parse_range(srv, con, p)) {
+                                con->http_status = 206;
+                        }
+
+                        free (ctx);
+                        con->plugin_ctx[p->id] = NULL;
+                        return HANDLER_FINISHED;
+                }
+        }
+  
+        /* if we are still here, prepare body */
+
+        /* we add it here for all requests
+         * the HEAD request will drop it afterwards again
+         */
+        /*TODO check whether 1 should be subtracted */
+
+        if (p->conf.xattr_file_size && p->conf.xattr_file_size->ptr)
+                size = atoi (p->conf.xattr_file_size->ptr);
+
+        if (size < (size_t)sce->st.st_size) {
+                http_chunk_append_glusterfs_file_chunk (srv, con, ctx->fd, 0, sce->st.st_size);
+        } else {
+                http_chunk_append_glusterfs_mem (srv, con, ctx->buf, sce->st.st_size);
+        }
+        
+        con->http_status = 200;
+        con->file_finished = 1;
+  
+        free (ctx);
+        con->plugin_ctx[p->id] = NULL;
+
+        return HANDLER_FINISHED;
+}
+
+#if 0
+URIHANDLER_FUNC(mod_glusterfs_request_done)
+{
+        mod_glusterfs_read_buf_t *cur = first, *prev;
+        while (cur) {
+                prev =  cur;
+                glusterfs_free (cur->buf);
+                cur = cur->next;
+                free (prev);
+        }
+        first = NULL
+                }
+#endif
+
+/* this function is called at dlopen() time and inits the callbacks */
+CONNECTION_FUNC(mod_glusterfs_connection_reset) 
+{
+        (void) p_d;
+        (void) con;
+        if (!network_backend_write)
+                network_backend_write = srv->network_backend_write;
+
+        srv->network_backend_write = mod_glusterfs_network_backend_write;
+
+        return HANDLER_GO_ON;
+}
+
+int mod_glusterfs_plugin_init(plugin *p) {
+        p->version     = LIGHTTPD_VERSION_ID;
+        p->name        = buffer_init_string("glusterfs");
+        p->init        = mod_glusterfs_init;
+        p->handle_physical = mod_glusterfs_handle_physical;
+        p->handle_subrequest_start = mod_glusterfs_subrequest;
+        //      p->handle_request_done = mod_glusterfs_request_done;
+        p->set_defaults  = mod_glusterfs_set_defaults;
+        p->connection_reset = mod_glusterfs_connection_reset;
+        p->cleanup     = mod_glusterfs_free;
+  
+        p->data        = NULL;
+  
+        return 0;
+}
+
+
+/* mod_glusterfs_stat_cache */
+static stat_cache_entry * stat_cache_entry_init(void) {
+        stat_cache_entry *sce = NULL;
+  
+        sce = calloc(1, sizeof(*sce));
+        /* ERR_ABORT (sce); */
+  
+        sce->name = buffer_init();
+        sce->etag = buffer_init();
+        sce->content_type = buffer_init();
+
+        return sce;
+}
+
+#ifdef HAVE_FAM_H
+static fam_dir_entry * fam_dir_entry_init(void) {
+        fam_dir_entry *fam_dir = NULL;
+  
+        fam_dir = calloc(1, sizeof(*fam_dir));
+        /* ERR_ABORT (fam_dir); */
+  
+        fam_dir->name = buffer_init();
+  
+        return fam_dir;
+}
+
+static void fam_dir_entry_free(void *data) {
+        fam_dir_entry *fam_dir = data;
+
+        if (!fam_dir) return;
+
+        FAMCancelMonitor(fam_dir->fc, fam_dir->req);
+
+        buffer_free(fam_dir->name);
+        free(fam_dir->req);
+
+        free(fam_dir);
+}
+#endif
+
+#ifdef HAVE_XATTR
+static int stat_cache_attr_get(buffer *buf, char *name) {
+        int attrlen;
+        int ret;
+  
+        attrlen = 1024;
+        buffer_prepare_copy(buf, attrlen);
+        attrlen--;
+        if(0 == (ret = attr_get(name, "Content-Type", buf->ptr, &attrlen, 0))) {
+                buf->used = attrlen + 1;
+                buf->ptr[attrlen] = '\0';
+        }
+        return ret;
+}
+#endif
+
+/* the famous DJB hash function for strings */
+static uint32_t hashme(buffer *str) {
+        uint32_t hash = 5381;
+        const char *s;
+        for (s = str->ptr; *s; s++) {
+                hash = ((hash << 5) + hash) + *s;
+        }
+  
+        hash &= ~(1 << 31); /* strip the highest bit */
+  
+        return hash;
+}
+
+
+#ifdef HAVE_LSTAT
+static int stat_cache_lstat(server *srv, buffer *dname, struct stat *lst) {
+        if (lstat(dname->ptr, lst) == 0) {
+                return S_ISLNK(lst->st_mode) ? 0 : 1;
+        }
+        else {
+                log_error_write(srv, __FILE__, __LINE__, "sbs",
+                                "lstat failed for:",
+                                dname, strerror(errno));
+        };
+        return -1;
+}
+#endif
+
+/***
+ *
+ *
+ *
+ * returns:
+ *  - HANDLER_FINISHED on cache-miss (don't forget to reopen the file)
+ *  - HANDLER_ERROR on stat() failed -> see errno for problem
+ */
+
+handler_t glusterfs_stat_cache_get_entry(server *srv, 
+                                         connection *con, 
+                                         libglusterfs_handle_t handle, 
+                                         buffer *glusterfs_path,
+                                         buffer *name, 
+                                         void *buf, 
+                                         size_t size, 
+                                         stat_cache_entry **ret_sce) 
+{
+#ifdef HAVE_FAM_H
+        fam_dir_entry *fam_dir = NULL;
+        int dir_ndx = -1;
+        splay_tree *dir_node = NULL;
+#endif
+        stat_cache_entry *sce = NULL;
+        stat_cache *sc;
+        struct stat st; 
+        size_t k;
+#ifdef DEBUG_STAT_CACHE
+        size_t i;
+#endif
+        int file_ndx;
+        splay_tree *file_node = NULL;
+
+        *ret_sce = NULL;
+        memset (&st, 0, sizeof (st));
+
+        /*
+         * check if the directory for this file has changed
+         */
+
+        sc = srv->stat_cache;
+
+        buffer_copy_string_buffer(sc->hash_key, name);
+        buffer_append_long(sc->hash_key, con->conf.follow_symlink);
+
+        file_ndx = hashme(sc->hash_key);
+        sc->files = splaytree_splay(sc->files, file_ndx);
+
+#ifdef DEBUG_STAT_CACHE
+        for (i = 0; i < ctrl.used; i++) {
+                if (ctrl.ptr[i] == file_ndx) break;
+        }
+#endif
+
+        if (sc->files && (sc->files->key == file_ndx)) {
+#ifdef DEBUG_STAT_CACHE
+                /* it was in the cache */
+                assert(i < ctrl.used);
+#endif
+
+                /* we have seen this file already and
+                 * don't stat() it again in the same second */
+
+                file_node = sc->files;
+
+                sce = file_node->data;
+
+                /* check if the name is the same, we might have a collision */
+
+                if (buffer_is_equal(name, sce->name)) {
+                        if (srv->srvconf.stat_cache_engine == STAT_CACHE_ENGINE_SIMPLE) {
+                                if (sce->stat_ts == srv->cur_ts && !buf) {
+                                        *ret_sce = sce;
+                                        return HANDLER_GO_ON;
+                                }
+                        }
+                } else {
+                        /* oops, a collision,
+                         *
+                         * file_node is used by the FAM check below to see if we know this file
+                         * and if we can save a stat().
+                         *
+                         * BUT, the sce is not reset here as the entry into the cache is ok, we
+                         * it is just not pointing to our requested file.
+                         *
+                         *  */
+
+                        file_node = NULL;
+                }
+        } else {
+#ifdef DEBUG_STAT_CACHE
+                if (i != ctrl.used) {
+                        fprintf(stderr, "%s.%d: %08x was already inserted but not found in cache, %s\n", __FILE__, __LINE__, file_ndx, name->ptr);
+                }
+                assert(i == ctrl.used);
+#endif
+        }
+        /*
+         * *lol*
+         * - open() + fstat() on a named-pipe results in a (intended) hang.
+         * - stat() if regular file + open() to see if we can read from it is better
+         *
+         * */
+        if (-1 == glusterfs_lookup(handle, glusterfs_path->ptr, buf, size, &st)) {
+                return HANDLER_ERROR;
+        }
+
+        if (NULL == sce) {
+                int osize = 0;
+
+                if (sc->files) {
+                        osize = sc->files->size;
+                }
+
+                sce = stat_cache_entry_init();
+                buffer_copy_string_buffer(sce->name, name);
+
+                sc->files = splaytree_insert(sc->files, file_ndx, sce);
+#ifdef DEBUG_STAT_CACHE
+                if (ctrl.size == 0) {
+                        ctrl.size = 16;
+                        ctrl.used = 0;
+                        ctrl.ptr = MALLOC(ctrl.size * sizeof(*ctrl.ptr));
+                        /* ERR_ABORT (ctrl.ptr); */
+                } else if (ctrl.size == ctrl.used) {
+                        ctrl.size += 16;
+                        ctrl.ptr = realloc(ctrl.ptr, ctrl.size * sizeof(*ctrl.ptr));
+                        /* ERR_ABORT (ctrl.ptr); */
+                }
+
+                ctrl.ptr[ctrl.used++] = file_ndx;
+
+                assert(sc->files);
+                assert(sc->files->data == sce);
+                assert(osize + 1 == splaytree_size(sc->files));
+#endif
+        }
+
+        sce->st = st;
+        sce->stat_ts = srv->cur_ts;
+
+        /* catch the obvious symlinks
+         *
+         * this is not a secure check as we still have a race-condition between
+         * the stat() and the open. We can only solve this by
+         * 1. open() the file
+         * 2. fstat() the fd
+         *
+         * and keeping the file open for the rest of the time. But this can
+         * only be done at network level.
+         *
+         * per default it is not a symlink
+         * */
+#ifdef HAVE_LSTAT
+        sce->is_symlink = 0;
+
+        /* we want to only check for symlinks if we should block symlinks.
+         */
+        if (!con->conf.follow_symlink) {
+                if (stat_cache_lstat(srv, name, &lst)  == 0) {
+#ifdef DEBUG_STAT_CACHE
+                        log_error_write(srv, __FILE__, __LINE__, "sb",
+                                        "found symlink", name);
+#endif
+                        sce->is_symlink = 1;
+                }
+
+                /*
+                 * we assume "/" can not be symlink, so
+                 * skip the symlink stuff if our path is /
+                 **/
+                else if ((name->used > 2)) {
+                        buffer *dname;
+                        char *s_cur;
+
+                        dname = buffer_init();
+                        buffer_copy_string_buffer(dname, name);
+
+                        while ((s_cur = strrchr(dname->ptr,'/'))) {
+                                *s_cur = '\0';
+                                dname->used = s_cur - dname->ptr + 1;
+                                if (dname->ptr == s_cur) {
+#ifdef DEBUG_STAT_CACHE
+                                        log_error_write(srv, __FILE__, __LINE__, "s", "reached /");
+#endif
+                                        break;
+                                }
+#ifdef DEBUG_STAT_CACHE
+                                log_error_write(srv, __FILE__, __LINE__, "sbs",
+                                                "checking if", dname, "is a symlink");
+#endif
+                                if (stat_cache_lstat(srv, dname, &lst)  == 0) {
+                                        sce->is_symlink = 1;
+#ifdef DEBUG_STAT_CACHE
+                                        log_error_write(srv, __FILE__, __LINE__, "sb",
+                                                        "found symlink", dname);
+#endif
+                                        break;
+                                };
+                        };
+                        buffer_free(dname);
+                };
+        };
+#endif
+
+        if (S_ISREG(st.st_mode)) {
+                /* determine mimetype */
+                buffer_reset(sce->content_type);
+
+                for (k = 0; k < con->conf.mimetypes->used; k++) {
+                        data_string *ds = (data_string *)con->conf.mimetypes->data[k];
+                        buffer *type = ds->key;
+
+                        if (type->used == 0) continue;
+
+                        /* check if the right side is the same */
+                        if (type->used > name->used) continue;
+
+                        if (0 == strncasecmp(name->ptr + name->used - type->used, type->ptr, type->used - 1)) {
+                                buffer_copy_string_buffer(sce->content_type, ds->value);
+                                break;
+                        }
+                }
+                etag_create(sce->etag, &(sce->st), con->etag_flags);
+#ifdef HAVE_XATTR
+                if (con->conf.use_xattr && buffer_is_empty(sce->content_type)) {
+                        stat_cache_attr_get(sce->content_type, name->ptr);
+                }
+#endif
+        } else if (S_ISDIR(st.st_mode)) {
+                etag_create(sce->etag, &(sce->st), con->etag_flags);
+        }
+
+#ifdef HAVE_FAM_H
+        if (sc->fam &&
+            (srv->srvconf.stat_cache_engine == STAT_CACHE_ENGINE_FAM)) {
+                /* is this directory already registered ? */
+                if (!dir_node) {
+                        fam_dir = fam_dir_entry_init();
+                        fam_dir->fc = sc->fam;
+
+                        buffer_copy_string_buffer(fam_dir->name, sc->dir_name);
+
+                        fam_dir->version = 1;
+
+                        fam_dir->req = calloc(1, sizeof(FAMRequest));
+                        /* ERR_ABORT (fam_dir->req); */
+
+                        if (0 != FAMMonitorDirectory(sc->fam, fam_dir->name->ptr,
+                                                     fam_dir->req, fam_dir)) {
+
+                                log_error_write(srv, __FILE__, __LINE__, "sbsbs",
+                                                "monitoring dir failed:",
+                                                fam_dir->name, 
+                                                "file:", name,
+                                                FamErrlist[FAMErrno]);
+
+                                fam_dir_entry_free(fam_dir);
+                        } else {
+                                int osize = 0;
+
+                                if (sc->dirs) {
+                                        osize = sc->dirs->size;
+                                }
+
+                                sc->dirs = splaytree_insert(sc->dirs, dir_ndx, fam_dir);
+                                assert(sc->dirs);
+                                assert(sc->dirs->data == fam_dir);
+                                assert(osize == (sc->dirs->size - 1));
+                        }
+                } else {
+                        fam_dir = dir_node->data;
+                }
+
+                /* bind the fam_fc to the stat() cache entry */
+
+                if (fam_dir) {
+                        sce->dir_version = fam_dir->version;
+                        sce->dir_ndx     = dir_ndx;
+                }
+        }
+#endif
+
+        *ret_sce = sce;
+
+        return HANDLER_GO_ON;
+}
+
+/**
+ * remove stat() from cache which havn't been stat()ed for
+ * more than 10 seconds
+ *
+ *
+ * walk though the stat-cache, collect the ids which are too old
+ * and remove them in a second loop
+ */
+
+static int stat_cache_tag_old_entries(server *srv, splay_tree *t, int *keys, size_t *ndx) {
+        stat_cache_entry *sce;
+
+        if (!t) return 0;
+
+        stat_cache_tag_old_entries(srv, t->left, keys, ndx);
+        stat_cache_tag_old_entries(srv, t->right, keys, ndx);
+
+        sce = t->data;
+
+        if (srv->cur_ts - sce->stat_ts > 2) {
+                keys[(*ndx)++] = t->key;
+        }
+
+        return 0;
+}
diff --git a/mod_glusterfs/lighttpd/1.4/mod_glusterfs.h b/mod_glusterfs/lighttpd/1.4/mod_glusterfs.h
new file mode 100644
index 00000000000..5dc65cbcf4e
--- /dev/null
+++ b/mod_glusterfs/lighttpd/1.4/mod_glusterfs.h
@@ -0,0 +1,29 @@
+/*
+  Copyright (c) 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _MOD_GLUSTERFS_FILE_CACHE_H_
+#define _MOD_GLUSTERFS_FILE_CACHE_H_
+
+#include "stat_cache.h"
+#include <libglusterfsclient.h>
+#include "base.h"
+
+handler_t glusterfs_stat_cache_get_entry(server *srv, connection *con, libglusterfs_handle_t handle, buffer *glusterfs_path, buffer *name, void *buf, size_t size, stat_cache_entry **fce);
+
+#endif
diff --git a/mod_glusterfs/lighttpd/1.5/Makefile.am b/mod_glusterfs/lighttpd/1.5/Makefile.am
new file mode 100644
index 00000000000..eda329111dc
--- /dev/null
+++ b/mod_glusterfs/lighttpd/1.5/Makefile.am
@@ -0,0 +1,3 @@
+EXTRA_DIST = Makefile.am.diff mod_glusterfs.c mod_glusterfs.h README.txt
+
+CLEANFILES = 
diff --git a/mod_glusterfs/lighttpd/1.5/Makefile.am.diff b/mod_glusterfs/lighttpd/1.5/Makefile.am.diff
new file mode 100644
index 00000000000..375696b5d8f
--- /dev/null
+++ b/mod_glusterfs/lighttpd/1.5/Makefile.am.diff
@@ -0,0 +1,29 @@
+--- lighttpd-1.4.19/src/Makefile.am	2008-04-16 18:42:18.000000000 +0400
++++ lighttpd-1.4.19.mod/src/Makefile.am	2008-04-16 18:41:11.000000000 +0400
+@@ -1,4 +1,4 @@
+-AM_CFLAGS = $(FAM_CFLAGS)
++AM_CFLAGS = $(FAM_CFLAGS)  -D_FILE_OFFSET_BITS=64 -D__USE_FILE_OFFSET64
+ 
+ noinst_PROGRAMS=proc_open lemon # simple-fcgi #graphic evalo bench ajp ssl error_test adserver gen-license
+ sbin_PROGRAMS=lighttpd lighttpd-angel
+@@ -241,6 +241,11 @@
+ mod_accesslog_la_LDFLAGS = -module -export-dynamic -avoid-version -no-undefined
+ mod_accesslog_la_LIBADD = $(common_libadd)
+ 
++lib_LTLIBRARIES += mod_glusterfs.la
++mod_glusterfs_la_SOURCES = mod_glusterfs.c
++mod_glusterfs_la_CFLAGS = $(AM_CFLAGS) 
++mod_glusterfs_la_LDFLAGS = -module -export-dynamic -avoid-version -no-undefined -lglusterfsclient -lpthread
++mod_glusterfs_la_LIBADD = $(common_libadd) 
+ 
+ hdr = server.h buffer.h network.h log.h keyvalue.h \
+       response.h request.h fastcgi.h chunk.h \
+@@ -254,7 +259,7 @@
+       configparser.h mod_ssi_exprparser.h \
+       sys-mmap.h sys-socket.h mod_cml.h mod_cml_funcs.h \
+       splaytree.h proc_open.h status_counter.h \
+-      mod_magnet_cache.h
++      mod_magnet_cache.h mod_glusterfs.h
+ 
+ DEFS= @DEFS@ -DLIBRARY_DIR="\"$(libdir)\"" -DSBIN_DIR="\"$(sbindir)\""
+ 
diff --git a/mod_glusterfs/lighttpd/1.5/README.txt b/mod_glusterfs/lighttpd/1.5/README.txt
new file mode 100644
index 00000000000..bdbdfffbc50
--- /dev/null
+++ b/mod_glusterfs/lighttpd/1.5/README.txt
@@ -0,0 +1,57 @@
+Introduction
+============
+mod_glusterfs is a module written for lighttpd to speed up the access of files present on glusterfs. mod_glusterfs uses libglusterfsclient library provided for glusterfs and hence can be used without fuse (File System in User Space).
+
+Usage
+=====
+To use mod_glusterfs with lighttpd-1.5, copy mod_glusterfs.c and mod_glusterfs.h into src/ of lighttpd-1.5 source tree, and apply the Makefile.am.diff to src/Makefile.am. Re-run ./autogen.sh on the top level of the lighttpd-1.5 build tree and recompile.
+
+# cp mod_glusterfs.[ch] /home/glusterfs/lighttpd-1.5/src/
+# cp Makefile.am.diff /home/glusterfs/lighttpd-1.5/
+# cd /home/glusterfs/lighttpd-1.5
+# patch -p1 < Makefile.am.diff 
+# ./autogen.sh
+# ./configure
+# make
+# make install
+
+Configuration
+=============
+* mod_glusterfs should be listed at the begining of the list server.modules in lighttpd.conf. 
+
+Below is a snippet from lighttpd.conf concerning to mod_glusterfs.
+
+$HTTP["url"] =~ "^/glusterfs" {
+	glusterfs.prefix = "/glusterfs" 
+	glusterfs.logfile = "/var/log/glusterfs-logfile"
+	glusterfs.document-root = "/home/glusterfs/document-root"
+	glusterfs.volume-specfile = "/etc/glusterfs/glusterfs.vol"
+	glusterfs.loglevel = "error"
+	glusterfs.cache-timeout = 300
+	glusterfs.xattr-interface-size-limit = "65536"
+}
+
+* $HTTP["url"] =~ "^/glusterfs"
+  A perl style regular expression used to match against the url. If regular expression matches the url, the url is handled by mod_glusterfs. Note that the pattern given here should match glusterfs.prefix.
+
+* glusterfs.prefix (COMPULSORY)
+  A string to be present at the starting of the file path in the url so that the file would be handled by glusterfs.
+  Eg., A GET request on the url http://www.example.com/glusterfs-prefix/some-dir/example-file will result in fetching of the file "/some-dir/example-file" from glusterfs mount if glusterfs.prefix is set to "/glusterfs-prefix".
+
+* glusterfs.volume-specfile (COMPULSORY)
+  Path to the the glusterfs volume specification file.
+
+* glusterfs.logfile (COMPULSORY)
+  Path to the glusterfs logfile.
+
+* glusterfs.loglevel (OPTIONAL, default = warning)
+  Allowed values are critical, error, warning, debug, none in the decreasing order of severity of error conditions.
+
+* glusterfs.cache-timeout (OPTIONAL, default = 0)
+  Timeout values for glusterfs stat and lookup cache.
+
+* glusterfs.document-root (COMPULSORY)
+  An absolute path, relative to which all the files are fetched from glusterfs.
+
+* glusterfs.xattr-interface-size-limit (OPTIONAL, default = 0)
+  Files with sizes upto and including this value are fetched through the extended attribute interface of glusterfs rather than the usual open-read-close set of operations. For files of small sizes, it is recommended to use extended attribute interface.
diff --git a/mod_glusterfs/lighttpd/1.5/mod_glusterfs.c b/mod_glusterfs/lighttpd/1.5/mod_glusterfs.c
new file mode 100644
index 00000000000..4329640e2f4
--- /dev/null
+++ b/mod_glusterfs/lighttpd/1.5/mod_glusterfs.c
@@ -0,0 +1,1476 @@
+/*
+  Copyright (c) 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <pthread.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <unistd.h>
+#include <assert.h>
+
+#include "base.h"
+#include "log.h"
+#include "buffer.h"
+
+#include "plugin.h"
+
+#include "stat_cache.h"
+#include "mod_glusterfs.h"
+#include "etag.h"
+#include "response.h"
+
+#include "fdevent.h"
+#include "joblist.h"
+#include "http_req_range.h"
+#include "connections.h"
+#include "configfile.h"
+
+#include <libglusterfsclient.h>
+
+#ifdef HAVE_ATTR_ATTRIBUTES_H
+#include <attr/attributes.h>
+#endif
+
+#ifdef HAVE_FAM_H
+# include <fam.h>
+#endif
+
+#include "sys-mmap.h"
+
+/* NetBSD 1.3.x needs it */
+#ifndef MAP_FAILED
+# define MAP_FAILED -1
+#endif
+
+#ifndef O_LARGEFILE
+# define O_LARGEFILE 0
+#endif
+
+#ifndef HAVE_LSTAT
+#define lstat stat
+#endif
+
+#if 0
+/* enables debug code for testing if all nodes in the stat-cache as accessable */
+#define DEBUG_STAT_CACHE
+#endif
+
+#ifdef HAVE_LSTAT
+#undef HAVE_LSTAT
+#endif
+
+#define GLUSTERFS_FILE_CHUNK (FILE_CHUNK + 1)
+
+/* Keep this value large. Each glusterfs_async_read of GLUSTERFS_CHUNK_SIZE results in a network_backend_write of the read data*/
+
+#define GLUSTERFS_CHUNK_SIZE 8192
+
+/**
+ * this is a staticfile for a lighttpd plugin
+ *
+ */
+
+
+/* plugin config for all request/connections */
+
+typedef struct {
+        buffer *logfile;
+        buffer *loglevel;
+        buffer *specfile;
+        buffer *prefix;
+        buffer *xattr_file_size;
+        buffer *document_root;
+        array *exclude_exts;
+        unsigned short cache_timeout;
+
+        /* FIXME: its a pointer, hence cant be short */
+        unsigned long handle;
+} plugin_config;
+
+static network_status_t (*network_backend_write)(struct server *srv, connection *con, iosocket *sock, chunkqueue *cq);
+
+typedef struct {
+        PLUGIN_DATA;
+        buffer *range_buf;
+        plugin_config **config_storage;
+        http_req_range *ranges;
+        plugin_config conf;
+} plugin_data;
+
+typedef struct glusterfs_async_local {
+        int op_ret;
+        int op_errno;
+        pthread_mutex_t lock;
+        pthread_cond_t cond;
+        connection *con;
+        server *srv;
+        plugin_data *p;
+
+        union {
+                struct {
+                        char async_read_complete;
+                        off_t length;
+                        size_t read_bytes;
+                        glusterfs_read_buf_t *buf;
+                }readv;
+
+                struct {
+                        buffer *name;
+                        buffer *hash_key;
+                        size_t size;
+                }lookup;
+        }fop;
+} glusterfs_async_local_t;
+
+typedef struct {
+        unsigned long fd;
+        buffer *glusterfs_path;
+        void *buf;
+        off_t response_content_length;
+        int prefix;
+}mod_glusterfs_ctx_t;
+
+typedef struct {
+        chunkqueue *cq;
+        glusterfs_read_buf_t *buf;
+        size_t length;
+}mod_glusterfs_chunkqueue;
+
+#ifdef HAVE_FAM_H
+typedef struct {
+        FAMRequest *req;
+        FAMConnection *fc;
+
+        buffer *name;
+
+        int version;
+} fam_dir_entry;
+#endif
+
+/* the directory name is too long to always compare on it
+ * - we need a hash
+ * - the hash-key is used as sorting criteria for a tree
+ * - a splay-tree is used as we can use the caching effect of it
+ */
+
+/* we want to cleanup the stat-cache every few seconds, let's say 10
+ *
+ * - remove entries which are outdated since 30s
+ * - remove entries which are fresh but havn't been used since 60s
+ * - if we don't have a stat-cache entry for a directory, release it from the monitor
+ */
+
+#ifdef DEBUG_STAT_CACHE
+typedef struct {
+        int *ptr;
+
+        size_t used;
+        size_t size;
+} fake_keys;
+
+static fake_keys ctrl;
+#endif
+
+static stat_cache_entry * 
+stat_cache_entry_init(void) 
+{
+        stat_cache_entry *sce = NULL;
+
+        sce = calloc(1, sizeof(*sce));
+        /* ERR_ABORT (sce); */
+
+        sce->name = buffer_init();
+        sce->etag = buffer_init();
+        sce->content_type = buffer_init();
+
+        return sce;
+}
+
+int chunkqueue_append_glusterfs_mem (chunkqueue *cq, const char * mem, size_t len) {
+        buffer *buf = NULL;
+ 
+        buf = chunkqueue_get_append_buffer (cq);
+
+        if (buf->ptr)
+                free (buf->ptr);
+
+        buf->used = len + 1;
+        buf->ptr = (char *)mem;
+        buf->size = len;
+
+        return 0;
+}
+
+static int
+glusterfs_lookup_async_cbk (int op_ret, 
+                            int op_errno,
+                            void *buf,
+                            struct stat *st,
+                            void *cbk_data)
+{
+        glusterfs_async_local_t *local = cbk_data;
+
+        mod_glusterfs_ctx_t *ctx = NULL;
+        ctx = local->con->plugin_ctx[local->p->id];
+
+        assert (ctx->buf== buf);
+
+        if (op_ret || !(S_ISREG (st->st_mode) && (size_t)st->st_size <= local->fop.lookup.size)) {
+
+                free (ctx->buf);
+                ctx->buf = NULL;
+
+                if (op_ret) {
+                        buffer_free (ctx->glusterfs_path);
+                        ctx->glusterfs_path = NULL;
+                        free (ctx);
+                        local->con->plugin_ctx[local->p->id] = NULL;
+
+                        if (op_errno == ENOENT)
+                                local->con->http_status = 404;
+                        else 
+                                local->con->http_status = 403;
+                }
+        }
+
+        if (!op_ret) {
+                stat_cache_entry *sce = NULL;
+                stat_cache *sc = local->srv->stat_cache;
+
+                sce = (stat_cache_entry *)g_hash_table_lookup(sc->files, local->fop.lookup.hash_key);
+
+                if (!sce) {
+                        sce = stat_cache_entry_init();
+
+                        buffer_copy_string_buffer(sce->name, local->fop.lookup.name);
+                        g_hash_table_insert(sc->files, buffer_init_string(BUF_STR(local->fop.lookup.hash_key)), sce);
+                }
+
+                sce->state = STAT_CACHE_ENTRY_STAT_FINISHED;
+                sce->stat_ts = time (NULL);
+                memcpy (&sce->st, st, sizeof (*st));
+        }
+
+        g_async_queue_push (local->srv->joblist_queue, local->con);
+        /*
+          joblist_append (local->srv, local->con);
+          kill (getpid(), SIGUSR1);
+        */
+        free (local);
+        return 0;
+}
+
+static handler_t
+glusterfs_stat_cache_get_entry_async (server *srv, 
+                                      connection *con, 
+                                      plugin_data *p,
+                                      buffer *glusterfs_path,
+                                      buffer *name,
+                                      void *buf,
+                                      size_t size,
+                                      stat_cache_entry **ret_sce)
+{
+        stat_cache_entry *sce = NULL;
+        stat_cache *sc;
+        glusterfs_async_local_t *local = NULL;
+
+        *ret_sce = NULL;
+
+        /*
+         * check if the directory for this file has changed
+         */
+
+        sc = srv->stat_cache;
+
+        buffer_copy_string_buffer(sc->hash_key, name);
+        buffer_append_long(sc->hash_key, con->conf.follow_symlink);
+
+        if ((sce = (stat_cache_entry *)g_hash_table_lookup(sc->files, sc->hash_key))) {
+                /* know this entry already */
+
+                if (sce->state == STAT_CACHE_ENTRY_STAT_FINISHED && 
+                    !buf) {
+                        /* verify that this entry is still fresh */
+
+                        *ret_sce = sce;
+
+                        return HANDLER_GO_ON;
+                }
+        }
+
+
+        /*
+         * *lol*
+         * - open() + fstat() on a named-pipe results in a (intended) hang.
+         * - stat() if regular file + open() to see if we can read from it is better
+         *
+         * */
+
+        /* pass a job to the stat-queue */
+
+        local = calloc (1, sizeof (*local));
+        /* ERR_ABORT (local); */
+        local->con = con;
+        local->srv = srv;
+        local->p = p;
+        local->fop.lookup.name = buffer_init_buffer (name);
+        local->fop.lookup.hash_key = buffer_init_buffer (sc->hash_key);
+        local->fop.lookup.size = size;
+
+        if (glusterfs_lookup_async ((libglusterfs_handle_t )p->conf.handle, glusterfs_path->ptr, buf, size, glusterfs_lookup_async_cbk, (void *) local)) {
+                free (local);
+                return HANDLER_ERROR;
+        }
+
+        return HANDLER_WAIT_FOR_EVENT;
+}
+
+int 
+mod_glusterfs_readv_async_cbk (glusterfs_read_buf_t *buf,
+                               void *cbk_data)
+{
+        glusterfs_async_local_t *local = cbk_data;
+        pthread_mutex_lock (&local->lock);
+        {
+                local->fop.readv.async_read_complete = 1;
+                local->fop.readv.buf = buf;
+
+                pthread_cond_signal (&local->cond);
+        }
+        pthread_mutex_unlock (&local->lock);
+
+        return 0;
+}
+
+network_status_t 
+mod_glusterfs_read_async (server *srv, connection *con, chunk *glusterfs_chunk)
+{
+        glusterfs_async_local_t local;
+        off_t end = 0;
+        int nbytes;
+        int complete;
+        chunkqueue *cq = NULL;
+        chunk *c = NULL;
+        off_t offset = glusterfs_chunk->file.start;
+        size_t length = glusterfs_chunk->file.length;
+        unsigned long fd = (unsigned long)glusterfs_chunk->file.name;
+        network_status_t ret;
+
+        pthread_cond_init (&local.cond, NULL);
+        pthread_mutex_init (&local.lock, NULL);
+  
+        //local.fd = fd;
+        memset (&local, 0, sizeof (local));
+
+        if (length > 0)
+                end = offset + length;
+
+        cq = chunkqueue_init ();
+        if (!cq) {
+                con->http_status = 500;
+                return NETWORK_STATUS_FATAL_ERROR;
+        }
+
+        do {
+                glusterfs_read_buf_t *buf;
+                int i;
+                if (length > 0) {
+                        nbytes = end - offset;
+                        if (nbytes > GLUSTERFS_CHUNK_SIZE)
+                                nbytes = GLUSTERFS_CHUNK_SIZE;
+                } else
+                        nbytes = GLUSTERFS_CHUNK_SIZE;
+
+                glusterfs_read_async(fd, 
+                                     nbytes,
+                                     offset,
+                                     mod_glusterfs_readv_async_cbk,
+                                     (void *)&local);
+
+                pthread_mutex_lock (&local.lock);
+                {
+                        while (!local.fop.readv.async_read_complete) {
+                                pthread_cond_wait (&local.cond, &local.lock);
+                        }
+
+                        local.op_ret = local.fop.readv.buf->op_ret;
+                        local.op_errno = local.fop.readv.buf->op_errno;
+
+                        local.fop.readv.async_read_complete = 0;
+                        buf = local.fop.readv.buf;
+
+                        if ((int)length < 0)
+                                complete = (local.fop.readv.buf->op_ret <= 0);
+                        else {
+                                local.fop.readv.read_bytes += local.fop.readv.buf->op_ret;
+                                complete = ((local.fop.readv.read_bytes == length) || (local.fop.readv.buf->op_ret <= 0));
+                        }
+                }
+                pthread_mutex_unlock (&local.lock);
+
+                if (local.op_ret > 0) {
+                        for (i = 0; i < buf->count; i++) {
+                                buffer *nw_write_buf = chunkqueue_get_append_buffer (cq);
+
+                                nw_write_buf->used = nw_write_buf->size = buf->vector[i].iov_len + 1;
+                                nw_write_buf->ptr = buf->vector[i].iov_base;
+
+                                //      buffer_copy_memory (nw_write_buf, buf->vector[i].iov_base, buf->vector[i].iov_len + 1);
+                                offset += local.op_ret;
+                        }
+  
+                        ret = network_backend_write (srv, con, con->sock, cq);
+  
+                        if (chunkqueue_written (cq) != local.op_ret) {
+                                mod_glusterfs_chunkqueue *gf_cq;
+                                glusterfs_chunk->file.start = offset;
+                                if ((int)glusterfs_chunk->file.length > 0)
+                                        glusterfs_chunk->file.length -= local.fop.readv.read_bytes;
+
+                                gf_cq = calloc (1, sizeof (*gf_cq));
+                                /* ERR_ABORT (qf_cq); */
+                                gf_cq->cq = cq;
+                                gf_cq->buf = buf;
+                                gf_cq->length = local.op_ret;
+                                glusterfs_chunk->file.mmap.start = (char *)gf_cq;
+                                return ret;
+                        }
+      
+                        for (c = cq->first ; c; c = c->next) 
+                                c->mem->ptr = NULL;
+
+                        chunkqueue_reset (cq);
+                }
+
+                glusterfs_free (buf);
+        } while (!complete);
+
+        chunkqueue_free (cq);
+        glusterfs_close (fd);
+
+        if (local.op_ret < 0)
+                con->http_status = 500;
+
+        return (local.op_ret < 0 ? NETWORK_STATUS_FATAL_ERROR : NETWORK_STATUS_SUCCESS);
+}
+
+network_status_t mod_glusterfs_network_backend_write(struct server *srv, connection *con, iosocket *sock, chunkqueue *cq)
+{
+        chunk *c, *prev, *first;
+        int chunks_written = 0;
+        int error = 0;
+        network_status_t ret;
+
+        for (first = prev = c = cq->first; c; c = c->next, chunks_written++) {
+
+                if (c->type == MEM_CHUNK && c->mem->used && !c->mem->ptr) {
+                        if (cq->first != c) {
+                                prev->next = NULL;
+
+                                /* call stored network_backend_write */
+                                ret = network_backend_write (srv, con, sock, cq);
+
+                                prev->next = c;
+                                if (ret != NETWORK_STATUS_SUCCESS) {
+                                        cq->first = first;
+                                        return ret;
+                                }
+                        } 
+                        cq->first = c->next;
+
+                        if (c->file.fd < 0) {
+                                error = HANDLER_ERROR;
+                                break;
+                        }
+
+                        if (c->file.mmap.start) {
+                                chunk *tmp;
+                                size_t len;
+                                mod_glusterfs_chunkqueue *gf_cq = (mod_glusterfs_chunkqueue *)c->file.mmap.start;
+
+                                ret = network_backend_write (srv, con, sock, gf_cq->cq);
+
+                                if ((len = (size_t)chunkqueue_written (gf_cq->cq)) != gf_cq->length) {
+                                        gf_cq->length -= len;
+                                        cq->first = first;
+                                        chunkqueue_remove_finished_chunks (gf_cq->cq);
+                                        return ret;
+                                }
+
+                                for (tmp = gf_cq->cq->first ; tmp; tmp = tmp->next)
+                                        tmp->mem->ptr = NULL;
+
+                                chunkqueue_free (gf_cq->cq);
+                                glusterfs_free (gf_cq->buf);
+                                free (gf_cq);
+                                c->file.mmap.start = NULL;
+                        }
+      
+                        ret = mod_glusterfs_read_async (srv, con, c); //c->file.fd, c->file.start, -1);//c->file.length);
+                        if (c->file.mmap.start) {
+                                /* pending chunkqueue from mod_glusterfs_read_async to be written to network */
+                                cq->first = first;
+                                return ret;
+                        }
+
+                        buffer_free (c->mem);
+                        c->mem = NULL;
+
+                        c->type = FILE_CHUNK;
+                        c->offset = c->file.length = 0;
+                        c->file.name = NULL;
+
+                        if (first == c)
+                                first = c->next;
+
+                        if (cq->last == c)
+                                cq->last = NULL;
+
+                        prev->next = c->next;
+
+                        free(c);
+                }     
+                prev = c;
+        }
+
+        ret = network_backend_write (srv, con, sock, cq);
+
+        cq->first = first;
+
+        return ret;
+}
+
+#if 0
+int chunkqueue_append_glusterfs_file (chunkqueue *cq, unsigned long fd, off_t offset, off_t len)
+{
+        chunk *c = NULL;
+        c = chunkqueue_get_append_tempfile (cq);
+  
+        if (c->file.is_temp) {
+                close (c->file.fd);
+                unlink (c->file.name->ptr);
+        }
+
+        c->type = MEM_CHUNK;
+
+        c->mem = buffer_init ();
+        c->mem->used = len + 1;
+        c->mem->ptr = NULL;
+        c->offset = 0;
+
+        /*  buffer_copy_string_buffer (c->file.name, fn); */
+        c->file.start = offset;
+        c->file.length = len;
+        /*  buffer_free (c->file.name); */
+
+        /* identify chunk as glusterfs related */
+        c->file.mmap.start = MAP_FAILED;
+        /*  c->file.mmap.length = c->file.mmap.offset = len;*/
+
+        return 0;
+}
+#endif
+
+int chunkqueue_append_dummy_mem_chunk (chunkqueue *cq, off_t len)
+{
+        chunk *c = NULL;
+        c = chunkqueue_get_append_tempfile (cq);
+  
+        if (c->file.is_temp) {
+                close (c->file.fd);
+                unlink (c->file.name->ptr);
+                c->file.is_temp = 0;
+        }
+
+        c->type = MEM_CHUNK;
+
+        c->mem->used = len + 1;
+        c->offset = len;
+        c->mem->ptr = NULL;
+
+        return 0;
+}
+
+int chunkqueue_append_glusterfs_file (chunkqueue *cq, unsigned long fd, off_t offset, off_t len)
+{
+        chunk *c = NULL;
+        c = chunkqueue_get_append_tempfile (cq);
+  
+        if (c->file.is_temp) {
+                close (c->file.fd);
+                unlink (c->file.name->ptr);
+                c->file.is_temp = 0;
+        }
+
+        c->type = MEM_CHUNK;
+
+        c->mem = buffer_init ();
+        c->mem->used = len + 1;
+        c->mem->ptr = NULL;
+        c->offset = 0;
+
+        /*  buffer_copy_string_buffer (c->file.name, fn); */
+        buffer_free (c->file.name);
+
+        /* fd returned by libglusterfsclient is a pointer */
+        c->file.name = (buffer *)fd;
+        c->file.start = offset;
+        c->file.length = len;
+
+        //c->file.fd = fd;
+        c->file.mmap.start = NULL;
+        return 0;
+}
+
+/* init the plugin data */
+INIT_FUNC(mod_glusterfs_init) {
+        plugin_data *p;
+
+        UNUSED (srv);
+        p = calloc(1, sizeof(*p));
+        /* ERR_ABORT (p); */
+        network_backend_write = NULL;
+        p->ranges = http_request_range_init();
+        return p;
+}
+
+/* detroy the plugin data */
+FREE_FUNC(mod_glusterfs_free) {
+        plugin_data *p = p_d;
+
+        UNUSED (srv);
+
+        if (!p) return HANDLER_GO_ON;
+  
+        if (p->config_storage) {
+                size_t i;
+                for (i = 0; i < srv->config_context->used; i++) {
+                        plugin_config *s = p->config_storage[i];
+      
+                        buffer_free (s->logfile);
+                        buffer_free (s->loglevel);
+                        buffer_free (s->specfile);
+                        buffer_free (s->prefix);
+                        buffer_free (s->xattr_file_size);
+                        buffer_free (s->document_root);
+                        array_free (s->exclude_exts);
+  
+                        free (s);
+                }
+                free (p->config_storage);
+        }
+        buffer_free (p->range_buf);
+        http_request_range_free (p->ranges);
+
+        free (p);
+  
+        return HANDLER_GO_ON;
+}
+
+SETDEFAULTS_FUNC(mod_glusterfs_set_defaults) {
+        plugin_data *p = p_d;
+        size_t i = 0;
+  
+        config_values_t cv[] = {
+                { "glusterfs.logfile",              NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
+    
+                { "glusterfs.loglevel",             NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },         
+                { "glusterfs.volume-specfile",             NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },          
+                { "glusterfs.cache-timeout",              NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION },
+    
+                { "glusterfs.exclude-extensions",   NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION },
+    
+                /*TODO: get the prefix from config_conext and remove glusterfs.prefix from conf file */
+                { "glusterfs.prefix", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
+    
+                { "glusterfs.xattr-interface-size-limit", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
+
+                { "glusterfs.document-root", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
+    
+                { NULL,                          NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
+        };
+  
+        p->config_storage = calloc(1, srv->config_context->used * sizeof(specific_config *));
+        /* ERR_ABORT (p->config_storage); */
+        p->range_buf = buffer_init ();
+  
+        for (i = 0; i < srv->config_context->used; i++) {
+                plugin_config *s;
+
+                s = calloc(1, sizeof(plugin_config));
+                /* ERR_ABORT (s); */
+                s->logfile = buffer_init ();
+                s->loglevel = buffer_init ();
+                s->specfile = buffer_init ();
+                s->exclude_exts = array_init ();
+                s->prefix = buffer_init ();
+                s->xattr_file_size = buffer_init ();
+                s->document_root = buffer_init ();
+    
+                cv[0].destination = s->logfile;
+                cv[1].destination = s->loglevel;
+                cv[2].destination = s->specfile;
+                cv[3].destination = &s->cache_timeout;
+                cv[4].destination = s->exclude_exts;
+                cv[5].destination = s->prefix;
+                cv[6].destination = s->xattr_file_size;
+                cv[7].destination = s->document_root;
+
+                p->config_storage[i] = s;
+    
+                if (0 != config_insert_values_global(srv, ((data_config *)srv->config_context->data[i])->value, cv)) {
+                        return HANDLER_FINISHED;
+                }
+        }
+  
+        return HANDLER_GO_ON;
+}
+
+#define PATCH(x)                                \
+        p->conf.x = s->x;
+
+static int mod_glusterfs_patch_connection(server *srv, connection *con, plugin_data *p) {
+        size_t i, j;
+        plugin_config *s;
+
+        p->conf.logfile = NULL;
+        p->conf.loglevel = NULL;
+        p->conf.specfile = NULL;
+        p->conf.cache_timeout = 0;
+        p->conf.exclude_exts = NULL;
+        p->conf.prefix = NULL;
+        p->conf.xattr_file_size = NULL;
+        p->conf.exclude_exts = NULL;
+
+        /* skip the first, the global context */
+        /* glusterfs related config can only occur inside $HTTP["url"] == "<glusterfs-prefix>" */
+        for (i = 1; i < srv->config_context->used; i++) {
+                data_config *dc = (data_config *)srv->config_context->data[i];
+                s = p->config_storage[i];
+
+                /* condition didn't match */
+                if (!config_check_cond(srv, con, dc)) continue;
+    
+                /* merge config */
+                for (j = 0; j < dc->value->used; j++) {
+                        data_unset *du = dc->value->data[j];
+      
+                        if (buffer_is_equal_string (du->key, CONST_STR_LEN("glusterfs.logfile"))) {
+                                PATCH (logfile);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN("glusterfs.loglevel"))) {
+                                PATCH (loglevel);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN ("glusterfs.volume-specfile"))) {
+                                PATCH (specfile);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN("glusterfs.cache-timeout"))) {
+                                PATCH (cache_timeout);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN ("glusterfs.exclude-extensions"))) {
+                                PATCH (exclude_exts);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN ("glusterfs.prefix"))) {
+                                PATCH (prefix);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN ("glusterfs.xattr-interface-size-limit"))) {
+                                PATCH (xattr_file_size);
+                        } else if (buffer_is_equal_string (du->key, CONST_STR_LEN ("glusterfs.document-root"))) {
+                                PATCH (document_root);
+                        }
+                }
+        }
+        return 0;
+}
+
+#undef PATCH
+
+static int http_response_parse_range(server *srv, connection *con, plugin_data *p) {
+        int multipart = 0;
+        char *boundary = "fkj49sn38dcn3";
+        data_string *ds;
+        stat_cache_entry *sce = NULL;
+        buffer *content_type = NULL;
+        buffer *range = NULL;
+        http_req_range *ranges, *r;
+        mod_glusterfs_ctx_t *ctx = con->plugin_ctx[p->id];
+        size_t size = 0;
+
+        if (!ctx) {
+                return -1;
+        }
+
+        if (NULL != (ds = (data_string *)array_get_element(con->request.headers, CONST_STR_LEN("Range")))) {
+                range = ds->value;
+        } else {
+                /* we don't have a Range header */
+
+                return -1;
+        }
+
+        if (HANDLER_ERROR == stat_cache_get_entry(srv, con, con->physical.path, &sce)) {
+                SEGFAULT();
+        }
+
+        ctx->response_content_length = con->response.content_length = 0;
+
+        if (NULL != (ds = (data_string *)array_get_element(con->response.headers, CONST_STR_LEN("Content-Type")))) {
+                content_type = ds->value;
+        }
+
+        /* start the range-header parser
+         * bytes=<num>  */
+
+        ranges = p->ranges;
+        http_request_range_reset(ranges);
+        switch (http_request_range_parse(range, ranges)) {
+        case PARSE_ERROR:
+                return -1; /* no range valid Range Header */
+        case PARSE_SUCCESS:
+                break;
+        default:
+                TRACE("%s", "foobar");
+                return -1;
+        }
+
+        if (ranges->next) {
+                multipart = 1;
+        }
+
+        if (p->conf.xattr_file_size && p->conf.xattr_file_size->ptr) {
+                size = atoi (p->conf.xattr_file_size->ptr);
+        }
+
+        /* patch the '-1' */
+        for (r = ranges; r; r = r->next) {
+                if (r->start == -1) {
+                        /* -<end>
+                         *
+                         * the last <end> bytes  */
+                        r->start = sce->st.st_size - r->end;
+                        r->end = sce->st.st_size - 1;
+                }
+                if (r->end == -1) {
+                        /* <start>-
+                         * all but the first <start> bytes */
+
+                        r->end = sce->st.st_size - 1;
+                }
+
+                if (r->end > sce->st.st_size - 1) {
+                        /* RFC 2616 - 14.35.1
+                         *
+                         * if last-byte-pos not present or > size-of-file
+                         * take the size-of-file
+                         *
+                         *  */
+                        r->end = sce->st.st_size - 1;
+                }
+
+                if (r->start > sce->st.st_size - 1) {
+                        /* RFC 2616 - 14.35.1
+                         *
+                         * if first-byte-pos > file-size, 416
+                         */
+
+                        con->http_status = 416;
+                        return -1;
+                }
+
+                if (r->start > r->end) {
+                        /* RFC 2616 - 14.35.1
+                         *
+                         * if last-byte-pos is present, it has to be >= first-byte-pos
+                         *
+                         * invalid ranges have to be handle as no Range specified
+                         *  */
+
+                        return -1;
+                }
+        }
+
+        if (r) {
+                /* we ran into an range violation */
+                return -1;
+        }
+
+        if (multipart) {
+                buffer *b;
+                for (r = ranges; r; r = r->next) {
+                        /* write boundary-header */
+
+                        b = chunkqueue_get_append_buffer(con->send);
+
+                        buffer_copy_string(b, "\r\n--");
+                        buffer_append_string(b, boundary);
+
+                        /* write Content-Range */
+                        buffer_append_string(b, "\r\nContent-Range: bytes ");
+                        buffer_append_off_t(b, r->start);
+                        buffer_append_string(b, "-");
+                        buffer_append_off_t(b, r->end);
+                        buffer_append_string(b, "/");
+                        buffer_append_off_t(b, sce->st.st_size);
+
+                        buffer_append_string(b, "\r\nContent-Type: ");
+                        buffer_append_string_buffer(b, content_type);
+
+                        /* write END-OF-HEADER */
+                        buffer_append_string(b, "\r\n\r\n");
+
+                        con->response.content_length += b->used - 1;
+                        ctx->response_content_length += b->used - 1;
+                        con->send->bytes_in += b->used - 1;
+
+                        if ((size_t)sce->st.st_size > size) {
+                                chunkqueue_append_glusterfs_file(con->send_raw, ctx->fd, r->start, r->end - r->start + 1);
+                                con->send_raw->bytes_in += (r->end - r->start + 1);
+                                chunkqueue_append_dummy_mem_chunk (con->send, r->end - r->start + 1);
+                        } else {
+                                chunkqueue_append_mem (con->send, ((char *)ctx->buf) + r->start, r->end - r->start + 1); 
+                                free (ctx->buf);
+                                ctx->buf = NULL;
+                        }
+                
+                        con->response.content_length += r->end - r->start + 1;
+                        ctx->response_content_length += r->end - r->start + 1;
+                        con->send->bytes_in += r->end - r->start + 1;
+                }
+
+                /* add boundary end */
+                b = chunkqueue_get_append_buffer(con->send);
+
+                buffer_copy_string_len(b, "\r\n--", 4);
+                buffer_append_string(b, boundary);
+                buffer_append_string_len(b, "--\r\n", 4);
+
+                con->response.content_length += b->used - 1;
+                ctx->response_content_length += b->used - 1;
+                con->send->bytes_in += b->used - 1;
+
+                /* set header-fields */
+
+                buffer_copy_string(p->range_buf, "multipart/byteranges; boundary=");
+                buffer_append_string(p->range_buf, boundary);
+
+                /* overwrite content-type */
+                response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_BUF_LEN(p->range_buf));
+
+        } else {
+                r = ranges;
+
+                chunkqueue_append_glusterfs_file(con->send_raw, ctx->fd, r->start, r->end - r->start + 1);
+                con->send_raw->bytes_in += (r->end - r->start + 1);
+                chunkqueue_append_dummy_mem_chunk (con->send, r->end - r->start + 1);
+                con->response.content_length += r->end - r->start + 1;
+                ctx->response_content_length += r->end - r->start + 1;
+                con->send->bytes_in += r->end - r->start + 1;
+
+                buffer_copy_string(p->range_buf, "bytes ");
+                buffer_append_off_t(p->range_buf, r->start);
+                buffer_append_string(p->range_buf, "-");
+                buffer_append_off_t(p->range_buf, r->end);
+                buffer_append_string(p->range_buf, "/");
+                buffer_append_off_t(p->range_buf, sce->st.st_size);
+
+                response_header_insert(srv, con, CONST_STR_LEN("Content-Range"), CONST_BUF_LEN(p->range_buf));
+        }
+
+        /* ok, the file is set-up */
+        return 0;
+}
+
+PHYSICALPATH_FUNC(mod_glusterfs_handle_physical) {
+        plugin_data *p = p_d;
+        stat_cache_entry *sce;
+        size_t size = 0;
+        handler_t ret = 0;
+        mod_glusterfs_ctx_t *plugin_ctx = NULL;
+
+        if (con->http_status != 0) return HANDLER_GO_ON;
+        if (con->uri.path->used == 0) return HANDLER_GO_ON;
+        if (con->physical.path->used == 0) return HANDLER_GO_ON;
+
+        if (con->mode != DIRECT) return HANDLER_GO_ON;
+
+        /*
+          network_backend_write = srv->network_backend_write;
+          srv->network_backend_write = mod_glusterfs_network_backend_write;
+        */
+
+        switch (con->request.http_method) {
+        case HTTP_METHOD_GET:
+        case HTTP_METHOD_POST:
+        case HTTP_METHOD_HEAD:
+                break;
+
+        default:
+                return HANDLER_GO_ON;
+        }
+
+        mod_glusterfs_patch_connection(srv, con, p);
+
+        if (!p->conf.prefix || !p->conf.prefix->ptr) {
+                return HANDLER_GO_ON;
+        }
+
+        if (!p->conf.document_root || p->conf.document_root->used == 0) {
+                log_error_write(srv, __FILE__, __LINE__, "s", "glusterfs.document-root is not specified");
+                con->http_status = 500;
+                return HANDLER_FINISHED;
+        }
+
+        if (p->conf.handle <= 0) {
+                glusterfs_init_ctx_t ctx;
+
+                if (!p->conf.specfile || p->conf.specfile->used == 0) {
+                        return HANDLER_GO_ON;
+                }
+                memset (&ctx, 0, sizeof (ctx));
+
+                ctx.specfile = p->conf.specfile->ptr;
+                ctx.logfile = p->conf.logfile->ptr;
+                ctx.loglevel = p->conf.loglevel->ptr;
+                ctx.lookup_timeout = ctx.stat_timeout = p->conf.cache_timeout;
+
+                p->conf.handle = (unsigned long)glusterfs_init (&ctx);
+
+                if (p->conf.handle <= 0) {
+                        con->http_status = 500;
+                        log_error_write(srv, __FILE__, __LINE__,  "sbs",  "glusterfs initialization failed, please check your configuration. Glusterfs logfile ", p->conf.logfile, "might contain details");
+                        return HANDLER_FINISHED;
+                }
+        }
+
+        size = 0;
+        if (p->conf.xattr_file_size && p->conf.xattr_file_size->ptr) 
+                size = atoi (p->conf.xattr_file_size->ptr);
+
+        if (!con->plugin_ctx[p->id]) {
+                buffer *tmp_buf = buffer_init_buffer (con->physical.basedir);
+
+                plugin_ctx = calloc (1, sizeof (*plugin_ctx));
+                /* ERR_ABORT (plugin_ctx); */
+                con->plugin_ctx[p->id] = plugin_ctx;
+    
+                buffer_append_string_buffer (tmp_buf, p->conf.prefix);
+                buffer_path_simplify (tmp_buf, tmp_buf);
+
+                plugin_ctx->prefix = tmp_buf->used - 1;
+                if (tmp_buf->ptr[plugin_ctx->prefix - 1] == '/')
+                        plugin_ctx->prefix--;
+
+                buffer_free (tmp_buf);
+        } else 
+                /*FIXME: error!! error!! */
+                plugin_ctx = con->plugin_ctx[p->id];
+
+
+        if (size) 
+        {
+                plugin_ctx->buf = MALLOC (size);
+                /* ERR_ABORT (plugin_ctx->buf); */
+        }
+
+        plugin_ctx->glusterfs_path = buffer_init ();
+        buffer_copy_string_buffer (plugin_ctx->glusterfs_path, p->conf.document_root);
+        buffer_append_string (plugin_ctx->glusterfs_path, "/");
+        buffer_append_string (plugin_ctx->glusterfs_path, con->physical.path->ptr + plugin_ctx->prefix);
+        buffer_path_simplify (plugin_ctx->glusterfs_path, plugin_ctx->glusterfs_path);
+
+        ret = glusterfs_stat_cache_get_entry_async (srv, con, p, plugin_ctx->glusterfs_path, con->physical.path, plugin_ctx->buf, size, &sce);
+
+        if (ret == HANDLER_ERROR) {
+                free (plugin_ctx->buf);
+                plugin_ctx->buf = NULL;
+
+                buffer_free (plugin_ctx->glusterfs_path);
+                plugin_ctx->glusterfs_path = NULL;
+
+                free (plugin_ctx);
+                con->plugin_ctx[p->id] = NULL;
+
+                con->http_status = 500;
+                ret = HANDLER_FINISHED;
+        }
+
+        return ret;
+}
+
+URIHANDLER_FUNC(mod_glusterfs_subrequest) {
+        plugin_data *p = p_d;
+        stat_cache_entry *sce = NULL;
+        int s_len;
+        unsigned long fd;
+        char allow_caching = 1;
+        size_t size = 0;
+        mod_glusterfs_ctx_t *ctx = con->plugin_ctx[p->id];
+
+        /* someone else has done a decision for us */
+        if (con->http_status != 0) return HANDLER_GO_ON;
+        if (con->uri.path->used == 0) return HANDLER_GO_ON;
+        if (con->physical.path->used == 0) return HANDLER_GO_ON;
+  
+        /* someone else has handled this request */
+        if (con->mode != DIRECT) return HANDLER_GO_ON;
+  
+        /* we only handle GET, POST and HEAD */
+        switch(con->request.http_method) {
+        case HTTP_METHOD_GET:
+        case HTTP_METHOD_POST:
+        case HTTP_METHOD_HEAD:
+                break;
+        default:
+                return HANDLER_GO_ON;
+        }
+  
+        mod_glusterfs_patch_connection(srv, con, p);
+  
+        if (!p->conf.prefix || !p->conf.prefix->ptr)
+                return HANDLER_GO_ON;
+
+        if (!ctx) {
+                con->http_status = 500;
+                return HANDLER_FINISHED;
+        }
+
+        s_len = con->uri.path->used - 1;
+        /* ignore certain extensions */
+        /*
+          for (k = 0; k < p->conf.exclude_exts->used; k++) {
+          data_string *ds;
+          ds = (data_string *)p->conf.exclude_exts->data[k];
+          
+          if (ds->value->used == 0) continue;
+    
+          if (!strncmp (ds->value->ptr, con->uri.path->ptr, strlen (ds->value->ptr)))
+          break;
+          }
+  
+          if (k == p->conf.exclude_exts->used) {
+          return HANDLER_GO_ON;
+          }
+        */
+
+        if (con->conf.log_request_handling) {
+                log_error_write(srv, __FILE__, __LINE__,  "s",  "-- serving file from glusterfs");
+        }
+
+        if (HANDLER_ERROR == stat_cache_get_entry(srv, con, con->physical.path, &sce)) {
+                con->http_status = 403;
+
+                /* this might happen if the sce is removed from stat-cache after a successful glusterfs_lookup */
+                if (ctx) {
+                        if (ctx->buf) {
+                                free (ctx->buf);
+                                ctx->buf = NULL;
+                        }
+
+                        if (ctx->glusterfs_path) {
+                                buffer_free (ctx->glusterfs_path);
+                                ctx->glusterfs_path = NULL;
+                        }               
+                        free (ctx);
+                        con->plugin_ctx[p->id] = NULL;
+                }
+
+                log_error_write(srv, __FILE__, __LINE__, "sbsb",
+                                "not a regular file:", con->uri.path,
+                                "->", con->physical.path);
+    
+                return HANDLER_FINISHED;
+        }
+
+        if (con->uri.path->ptr[s_len] == '/' || !S_ISREG(sce->st.st_mode)) {
+                if (ctx) {
+                        if (ctx->glusterfs_path) {
+                                buffer_free (ctx->glusterfs_path);
+                                ctx->glusterfs_path = NULL;
+                        }
+
+                        free (ctx);
+                        con->plugin_ctx[p->id] = NULL;
+                }
+
+                return HANDLER_FINISHED;
+        }
+
+        if (p->conf.xattr_file_size && p->conf.xattr_file_size->ptr)
+                size = atoi (p->conf.xattr_file_size->ptr);
+
+        if ((size_t)sce->st.st_size > size) {
+    
+                fd = glusterfs_open ((libglusterfs_handle_t ) ((unsigned long)p->conf.handle), ctx->glusterfs_path->ptr, O_RDONLY, 0);
+    
+                if (!fd) {
+                        if (ctx) {
+                                if (ctx->glusterfs_path) {
+                                        buffer_free (ctx->glusterfs_path);
+                                        ctx->glusterfs_path = NULL;
+                                }
+
+                                free (ctx);
+                                con->plugin_ctx[p->id] = NULL;
+                        }
+
+                        con->http_status = 403;
+                        return HANDLER_FINISHED;
+                }
+                ctx->fd = fd;
+        }
+
+        /* we only handline regular files */
+#ifdef HAVE_LSTAT
+        if ((sce->is_symlink == 1) && !con->conf.follow_symlink) {
+                con->http_status = 403;
+          
+                if (con->conf.log_request_handling) {
+                        log_error_write(srv, __FILE__, __LINE__,  "s",  "-- access denied due symlink restriction");
+                        log_error_write(srv, __FILE__, __LINE__,  "sb", "Path         :", con->physical.path);
+                }
+    
+                buffer_reset(con->physical.path);
+                if (ctx) {
+                        if (ctx->glusterfs_path) {
+                                buffer_free (ctx->glusterfs_path);
+                                ctx->glusterfs_path = NULL;
+                        }
+
+                        free (ctx);
+                        con->plugin_ctx[p->id] = NULL;
+                }
+
+                return HANDLER_FINISHED;
+        }
+#endif
+        if (!S_ISREG(sce->st.st_mode)) {
+                con->http_status = 404;
+    
+                if (con->conf.log_file_not_found) {
+                        log_error_write(srv, __FILE__, __LINE__, "sbsb",
+                                        "not a regular file:", con->uri.path,
+                                        "->", sce->name);
+                }
+    
+                if (ctx) {
+                        if (ctx->glusterfs_path) {
+                                buffer_free (ctx->glusterfs_path);
+                                ctx->glusterfs_path = NULL;
+                        }
+
+                        free (ctx);
+                        con->plugin_ctx[p->id] = NULL;
+                }
+
+                return HANDLER_FINISHED;
+        }
+
+        /* mod_compress might set several data directly, don't overwrite them */
+
+        /* set response content-type, if not set already */
+  
+        if (NULL == array_get_element(con->response.headers, CONST_STR_LEN("Content-Type"))) {
+                if (buffer_is_empty(sce->content_type)) {
+                        /* we are setting application/octet-stream, but also announce that
+                         * this header field might change in the seconds few requests 
+                         *
+                         * This should fix the aggressive caching of FF and the script download
+                         * seen by the first installations
+                         */
+                        response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("application/octet-stream"));
+      
+                        allow_caching = 0;
+                } else {
+                        response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_BUF_LEN(sce->content_type));
+                }
+        }
+  
+        if (con->conf.range_requests) {
+                response_header_overwrite(srv, con, CONST_STR_LEN("Accept-Ranges"), CONST_STR_LEN("bytes"));
+        }
+
+        /* TODO: Allow Cachable requests */     
+#if 0
+        if (allow_caching) {
+                if (p->conf.etags_used && con->etag_flags != 0 && !buffer_is_empty(sce->etag)) {
+                        if (NULL == array_get_element(con->response.headers, "ETag")) {
+                                /* generate e-tag */
+                                etag_mutate(con->physical.etag, sce->etag);
+        
+                                response_header_overwrite(srv, con, CONST_STR_LEN("ETag"), CONST_BUF_LEN(con->physical.etag));
+                        }
+                }
+    
+                /* prepare header */
+                if (NULL == (ds = (data_string *)array_get_element(con->response.headers, "Last-Modified"))) {
+                        mtime = strftime_cache_get(srv, sce->st.st_mtime);
+                        response_header_overwrite(srv, con, CONST_STR_LEN("Last-Modified"), CONST_BUF_LEN(mtime));
+                } else {
+                        mtime = ds->value;
+                }
+    
+                if (HANDLER_FINISHED == http_response_handle_cachable(srv, con, mtime)) {
+                        if (ctx) {
+                                if (ctx->glusterfs_path) {
+                                        buffer_free (ctx->glusterfs_path);
+                                        ctx->glusterfs_path = NULL;
+                                }
+
+                                free (ctx);
+                                con->plugin_ctx[p->id] = NULL;
+                        }
+
+                        return HANDLER_FINISHED;
+                }
+        }
+#endif 
+  
+        /*TODO: Read about etags */
+        if (NULL != array_get_element(con->request.headers, CONST_STR_LEN("Range")) && con->conf.range_requests) {
+                int do_range_request = 1;
+                data_string *ds = NULL;
+                buffer *mtime = NULL;
+                /* check if we have a conditional GET */
+    
+                /* prepare header */
+                if (NULL == (ds = (data_string *)array_get_element(con->response.headers, CONST_STR_LEN("Last-Modified")))) {
+                        mtime = strftime_cache_get(srv, sce->st.st_mtime);
+                        response_header_overwrite(srv, con, CONST_STR_LEN("Last-Modified"), CONST_BUF_LEN(mtime));
+                } else {
+                        mtime = ds->value;
+                }
+
+                if (NULL != (ds = (data_string *)array_get_element(con->request.headers, CONST_STR_LEN("If-Range")))) {
+                        /* if the value is the same as our ETag, we do a Range-request,
+                         * otherwise a full 200 */
+            
+                        if (ds->value->ptr[0] == '"') {
+                                /**
+                                 * client wants a ETag
+                                 */
+                                if (!con->physical.etag) {
+                                        do_range_request = 0;
+                                } else if (!buffer_is_equal(ds->value, con->physical.etag)) {
+                                        do_range_request = 0;
+                                }
+                        } else if (!mtime) {
+                                /**
+                                 * we don't have a Last-Modified and can match the If-Range: 
+                                 *
+                                 * sending all
+                                 */
+                                do_range_request = 0;
+                        } else if (!buffer_is_equal(ds->value, mtime)) {
+                                do_range_request = 0;
+                        }
+                }
+    
+                if (do_range_request) {
+                        /* content prepared, I'm done */
+                        con->send->is_closed = 1; 
+            
+                        if (0 == http_response_parse_range(srv, con, p)) {
+                                con->http_status = 206;
+                        }
+                        if (ctx) {
+                                if (ctx->glusterfs_path) {
+                                        buffer_free (ctx->glusterfs_path);
+                                        ctx->glusterfs_path = NULL;
+                                }
+                                free (ctx);
+                                con->plugin_ctx[p->id] = NULL;
+                        }
+
+                        return HANDLER_FINISHED;
+                }
+        }
+  
+        /* if we are still here, prepare body */
+
+        /* we add it here for all requests
+         * the HEAD request will drop it afterwards again
+         */
+
+        if (p->conf.xattr_file_size && p->conf.xattr_file_size->ptr)
+                size = atoi (p->conf.xattr_file_size->ptr);
+
+        if (size < (size_t)sce->st.st_size) {
+                chunkqueue_append_glusterfs_file (con->send_raw, fd, 0, sce->st.st_size);
+                con->send_raw->bytes_in += sce->st.st_size;
+                chunkqueue_append_dummy_mem_chunk (con->send, sce->st.st_size);
+        } else {
+                if (!ctx->buf) {
+                        con->http_status = 404;
+                        return HANDLER_ERROR;
+                }
+                chunkqueue_append_glusterfs_mem (con->send, ctx->buf, sce->st.st_size);
+                ctx->buf = NULL;
+        }
+        ctx->response_content_length = con->response.content_length = sce->st.st_size;
+  
+        con->send->is_closed = 1;
+        con->send->bytes_in = sce->st.st_size;
+
+        return HANDLER_FINISHED;
+}
+
+/* this function is called at dlopen() time and inits the callbacks */
+CONNECTION_FUNC(mod_glusterfs_connection_reset) 
+{
+        (void) p_d;
+        (void) con;
+        if (!network_backend_write)
+                network_backend_write = srv->network_backend_write;
+
+        srv->network_backend_write = mod_glusterfs_network_backend_write;
+
+        return HANDLER_GO_ON;
+}
+
+URIHANDLER_FUNC(mod_glusterfs_response_done) {
+        plugin_data *p = p_d;
+        UNUSED (srv);
+        mod_glusterfs_ctx_t *ctx = con->plugin_ctx[p->id];
+        
+        con->plugin_ctx[p->id] = NULL;
+        if (ctx->glusterfs_path) {
+                free (ctx->glusterfs_path);
+        }
+
+        free (ctx);
+        return HANDLER_GO_ON;
+}
+
+int mod_glusterfs_plugin_init(plugin *p) {
+        p->version     = LIGHTTPD_VERSION_ID;
+        p->name        = buffer_init_string("glusterfs");
+        p->init        = mod_glusterfs_init;
+        p->handle_physical = mod_glusterfs_handle_physical;
+        p->handle_start_backend = mod_glusterfs_subrequest;
+        p->handle_response_done = mod_glusterfs_response_done;
+        p->set_defaults  = mod_glusterfs_set_defaults;
+        p->connection_reset = mod_glusterfs_connection_reset;
+        p->cleanup     = mod_glusterfs_free;
+  
+        p->data        = NULL;
+  
+        return 0;
+}
diff --git a/mod_glusterfs/lighttpd/1.5/mod_glusterfs.h b/mod_glusterfs/lighttpd/1.5/mod_glusterfs.h
new file mode 100644
index 00000000000..b765936d611
--- /dev/null
+++ b/mod_glusterfs/lighttpd/1.5/mod_glusterfs.h
@@ -0,0 +1,29 @@
+/*
+   Copyright (c) 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
+   This file is part of GlusterFS.
+
+   GlusterFS is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3 of the License,
+   or (at your option) any later version.
+
+   GlusterFS is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see
+   <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _MOD_GLUSTERFS_FILE_CACHE_H_
+#define _MOD_GLUSTERFS_FILE_CACHE_H_
+
+#include "stat_cache.h"
+#include <libglusterfsclient.h>
+#include "base.h"
+
+handler_t glusterfs_stat_cache_get_entry(server *srv, connection *con, libglusterfs_handle_t handle, buffer *glusterfs_path, buffer *name, void *buf, size_t size, stat_cache_entry **fce);
+
+#endif
diff --git a/mod_glusterfs/lighttpd/Makefile.am b/mod_glusterfs/lighttpd/Makefile.am
new file mode 100644
index 00000000000..c934412b3dc
--- /dev/null
+++ b/mod_glusterfs/lighttpd/Makefile.am
@@ -0,0 +1,3 @@
+SUBDIRS = 1.4 1.5
+
+CLEANFILES = 
-- 
cgit