Added all files

5 files changed, 1594 insertions, 0 deletions

diff --git a/mod_glusterfs/lighttpd/1.5/Makefile.am b/mod_glusterfs/lighttpd/1.5/Makefile.am
new file mode 100644
index 000000000..eda329111
--- /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 000000000..375696b5d
--- /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="\"$(sbindir)\""
+ 
diff --git a/mod_glusterfs/lighttpd/1.5/README.txt b/mod_glusterfs/lighttpd/1.5/README.txt
new file mode 100644
index 000000000..bdbdfffbc
--- /dev/null
+++ b/mod_glusterfs/lighttpd/1.5/README.txt
@@ -0,0 +1,57 @@
+Introduction
+============
+mod_glusterfs is a module written for lighttpd to speed up the access of files present on glusterfs. mod_glusterfs uses libglusterfsclient library provided for glusterfs and hence can be used without fuse (File System in User Space).
+
+Usage
+=====
+To use mod_glusterfs with lighttpd-1.5, copy mod_glusterfs.c and mod_glusterfs.h into src/ of lighttpd-1.5 source tree, and apply the Makefile.am.diff to src/Makefile.am. Re-run ./autogen.sh on the top level of the lighttpd-1.5 build tree and recompile.
+
+# cp mod_glusterfs.[ch] /home/glusterfs/lighttpd-1.5/src/
+# cp Makefile.am.diff /home/glusterfs/lighttpd-1.5/
+# cd /home/glusterfs/lighttpd-1.5
+# patch -p1 < Makefile.am.diff 
+# ./autogen.sh
+# ./configure
+# make
+# make install
+
+Configuration
+=============
+* mod_glusterfs should be listed at the begining of the list server.modules in lighttpd.conf. 
+
+Below is a snippet from lighttpd.conf concerning to mod_glusterfs.
+
+$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 000000000..4329640e2
--- /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 000000000..b765936d6
--- /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