request.c revision 59513b1275fdc2021d4949ee03ae8229469abb86
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb/* ====================================================================
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * The Apache Software License, Version 1.1
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * Copyright (c) 2000-2001 The Apache Software Foundation. All rights
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * reserved.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * Redistribution and use in source and binary forms, with or without
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * modification, are permitted provided that the following conditions
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * are met:
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * 1. Redistributions of source code must retain the above copyright
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * notice, this list of conditions and the following disclaimer.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * 2. Redistributions in binary form must reproduce the above copyright
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * notice, this list of conditions and the following disclaimer in
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * the documentation and/or other materials provided with the
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * distribution.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * 3. The end-user documentation included with the redistribution,
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * if any, must include the following acknowledgment:
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * "This product includes software developed by the
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * Apache Software Foundation (http://www.apache.org/)."
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * Alternately, this acknowledgment may appear in the software itself,
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * if and wherever such third-party acknowledgments normally appear.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * 4. The names "Apache" and "Apache Software Foundation" must
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * not be used to endorse or promote products derived from this
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * software without prior written permission. For written
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * permission, please contact apache@apache.org.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * 5. Products derived from this software may not be called "Apache",
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * nor may "Apache" appear in their name, without prior written
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * permission of the Apache Software Foundation.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * SUCH DAMAGE.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * ====================================================================
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * This software consists of voluntary contributions made by many
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * individuals on behalf of the Apache Software Foundation. For more
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * information on the Apache Software Foundation, please see
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * Portions of this software are based upon public domain software
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * originally written at the National Center for Supercomputing Applications,
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * University of Illinois, Urbana-Champaign.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * http_request.c: functions to get and process requests
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * Rob McCool 3/21/93
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * Thoroughly revamped by rst for Apache. NB this file reads
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * best from the bottom up.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbbAP_IMPLEMENT_HOOK_VOID(insert_filter, (request_rec *r), (r))
c3e342e5b0b9fea6617ee16d2da02c3ef2108126dougmAP_IMPLEMENT_HOOK_RUN_ALL(int,create_request,(request_rec *r),(r),OK,DECLINED)
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowestatic int decl_die(int status, char *phase, request_rec *r)
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_CRIT, 0, r,
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe "configuration error: couldn't %s: %s", phase, r->uri);
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe/* This is the master logic for processing requests. Do NOT duplicate
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe * this logic elsewhere, or the security model will be broken by future
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe * API changes. Each phase must be individually optimized to pick up
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe * redundant/duplicate calls by subrequests, and redirects.
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewroweAP_DECLARE(int) ap_process_request_internal(request_rec *r)
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe /* Ignore embedded %2F's in path for proxy requests */
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe ap_getparents(r->uri); /* OK --- shrinking transformations... */
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe /* File-specific requests with no 'true' URI are a huge pain... they
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe * cannot bubble through the next several steps. Only subrequests may
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe * have an empty uri, otherwise let translate_name kill the request.
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe /* Reset to the server default config prior to running map_to_storage
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe /* This request wasn't in storage (e.g. TRACE) */
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe /* Excluding file-specific requests with no 'true' URI...
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe /* Rerun the location walk, which overrides any map_to_storage config.
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe /* Only on the main request! */
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe /* Skip authn/authz if the parent or prior request passed the authn/authz,
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe * and that configuration didn't change (this requires optimized _walk()
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe * functions in map_to_storage that use the same merge results given
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe * identical input.) If the config changes, we must re-auth.
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe if (r->main && (r->main->per_dir_config == r->per_dir_config)) {
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe else if (r->prev && (r->prev->per_dir_config == r->per_dir_config)) {
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe switch (ap_satisfies(r)) {
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe if ((access_status = ap_run_access_checker(r)) != 0) {
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe if (((access_status = ap_run_check_user_id(r)) != 0) || !ap_auth_type(r)) {
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe ? "check user. No user file?"
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe : "perform authentication. AuthType not set!", r);
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe if (((access_status = ap_run_auth_checker(r)) != 0) || !ap_auth_type(r)) {
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe ? "check access. No groups file?"
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe : "perform authentication. AuthType not set!", r);
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe if (((access_status = ap_run_access_checker(r)) != 0) || !ap_auth_type(r)) {
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe ? "check access"
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe : "perform authentication. AuthType not set!", r);
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe if (((access_status = ap_run_check_user_id(r)) != 0) || !ap_auth_type(r)) {
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe ? "check user. No user file?"
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe : "perform authentication. AuthType not set!", r);
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe if (((access_status = ap_run_auth_checker(r)) != 0) || !ap_auth_type(r)) {
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe ? "check access. No groups file?"
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe : "perform authentication. AuthType not set!", r);
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe /* XXX Must make certain the ap_run_type_checker short circuits mime
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe * in mod-proxy for r->proxyreq && r->parsed_uri.scheme
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe * && !strcmp(r->parsed_uri.scheme, "http")
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe /* The new insert_filter stage makes sense here IMHO. We are sure that
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe * we are going to run the request now, so we may as well insert filters
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe * if any are available. Since the goal of this phase is to allow all
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe * modules to insert a filter if they want to, this filter returns
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe * void. I just can't see any way that this filter can reasonably
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe * fail, either your modules inserts something or it doesn't. rbb
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe/* Useful caching structures to repeat _walk/merge sequences as required
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe * when a subrequest or redirect reuses substantially the same config.
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe * Directive order in the httpd.conf file and its Includes significantly
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe * impact this optimization. Grouping common blocks at the front of the
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe * config that are less likely to change between a request and
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe * its subrequests, or between a request and its redirects reduced
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe * the work of these functions significantly.
0540a0b469147b52e858587270dba31c2aaa9e09wrowetypedef struct walk_walked_t {
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe ap_conf_vector_t *matched; /* A dir_conf sections we matched */
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe ap_conf_vector_t *merged; /* The dir_conf merged result */
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowetypedef struct walk_cache_t {
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe ap_conf_vector_t **dir_conf_tested;/* The sections we matched against */
0f6fdc73136a064819585afe03bc3503826ee592wrowe ap_conf_vector_t *dir_conf_merged;/* Base per_dir_config */
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe ap_conf_vector_t *per_dir_result; /* per_dir_config += walked result */
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe apr_array_header_t *walked; /* The list of walk_walked_t results */
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowestatic walk_cache_t *prep_walk_cache(const char *cache_name, request_rec *r)
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe /* Find the most relevant, recent entry to work from. That would be
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe * this request (on the second call), or the parent request of a
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe * subrequest, or the prior request of an internal redirect. Provide
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe * this _walk()er with a copy it is allowed to munge. If there is no
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe * parent or prior cached request, then create a new walk cache.
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe if ((r->main && (apr_pool_userdata_get((void **)&cache,
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe || (r->prev && (apr_pool_userdata_get((void **)&cache,
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe cache->walked = apr_array_copy(r->pool, cache->walked);
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe cache->walked = apr_array_make(r->pool, 4, sizeof(walk_walked_t));
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb/*****************************************************************
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * Getting and checking directory configuration. Also checks the
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * FollowSymlinks and FollowSymOwner stuff, since this is really the
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * only place that can happen (barring a new mid_dir_walk callout).
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * We can't do it as an access_checker module function which gets
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * called with the final per_dir_config, since we could have a directory
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * with FollowSymLinks disabled, which contains a symlink to another
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * with a .htaccess file which turns FollowSymLinks back on --- and
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * access in such a case must be denied. So, whatever it is that
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * checks FollowSymLinks needs to know the state of the options as
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * they change, all the way down.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * We don't want people able to serve up pipes, or unix sockets, or other
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * scary things. Note that symlink tests are performed later.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r,
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb "object is not a file, directory or symlink: %s",
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe * resolve_symlink must _always_ be called on an APR_LNK file type!
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe * It will resolve the actual target file type, modification date, etc,
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe * and provide any processing required for symlink evaluation.
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe * Path must already be cleaned, no trailing slash, no multi-slashes,
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe * and don't call this on the root!
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe * Simply, the number of times we deref a symlink are minimal compared
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe * to the number of times we had an extra lstat() since we 'weren't sure'.
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe * To optimize, we stat() anything when given (opts & OPT_SYM_LINKS), otherwise
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe * we start off with an lstat(). Every lstat() must be dereferenced in case
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe * it points at a 'nasty' - we must always rerun check_safe_file (or similar.)
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowestatic int resolve_symlink(char *d, apr_finfo_t *lfi, int opts, apr_pool_t *p)
2f1949bb0e3c209db94c8d521cba7380b9d11421trawick if ((res = apr_stat(&fi, d, lfi->valid, p)) != APR_SUCCESS)
11fb2f3611e6ff9a541e10b13e3108934f828141gregames /* Give back the target */
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe /* OPT_SYM_OWNER only works if we can get the owner of
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe * both the file and symlink. First fill in a missing
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe * owner of the symlink, then get the info of the target.
2f1949bb0e3c209db94c8d521cba7380b9d11421trawick if ((res = apr_lstat(&fi, d, lfi->valid | APR_FINFO_OWNER, p))
2f1949bb0e3c209db94c8d521cba7380b9d11421trawick if ((res = apr_stat(&fi, d, lfi->valid, p)) != APR_SUCCESS)
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe if (apr_compare_users(fi.user, lfi->user) != APR_SUCCESS)
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe /* Give back the target */
8aefbd756763807188d2e3ce336a8680e4893066wrowe/*****************************************************************
8aefbd756763807188d2e3ce336a8680e4893066wrowe * Getting and checking directory configuration. Also checks the
8aefbd756763807188d2e3ce336a8680e4893066wrowe * FollowSymlinks and FollowSymOwner stuff, since this is really the
8aefbd756763807188d2e3ce336a8680e4893066wrowe * only place that can happen (barring a new mid_dir_walk callout).
8aefbd756763807188d2e3ce336a8680e4893066wrowe * We can't do it as an access_checker module function which gets
8aefbd756763807188d2e3ce336a8680e4893066wrowe * called with the final per_dir_config, since we could have a directory
8aefbd756763807188d2e3ce336a8680e4893066wrowe * with FollowSymLinks disabled, which contains a symlink to another
8aefbd756763807188d2e3ce336a8680e4893066wrowe * with a .htaccess file which turns FollowSymLinks back on --- and
8aefbd756763807188d2e3ce336a8680e4893066wrowe * access in such a case must be denied. So, whatever it is that
8aefbd756763807188d2e3ce336a8680e4893066wrowe * checks FollowSymLinks needs to know the state of the options as
8aefbd756763807188d2e3ce336a8680e4893066wrowe * they change, all the way down.
8aefbd756763807188d2e3ce336a8680e4893066wrowe core_server_config *sconf = ap_get_module_config(r->server->module_config,
2fa5b5878e7567e2875807c3e2a2b3b0d3ef74bewrowe ap_conf_vector_t **sec_ent = (ap_conf_vector_t **) sconf->sec_dir->elts;
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe /* XXX: Better (faster) tests needed!!!
8aa5ca8ff2a4d8e56f62ea3d461e2799136da085trawick * "OK" as a response to a real problem is not _OK_, but to allow broken
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe * modules to proceed, we will permit the not-a-path filename to pass here.
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe * We must catch it later if it's heading for the core handler. Leave an
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe * INFO note here for module debugging.
a8d11d78181478da6a672f7fbc58b8d523351f49wrowe if (r->filename == NULL || !ap_os_is_path_absolute(r->pool, r->filename)) {
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, 0, r,
ac06e54654494445fd3d39e90bd23b436b4f84ccwrowe "Module bug? Request filename path %s is missing or "
ac06e54654494445fd3d39e90bd23b436b4f84ccwrowe "or not absolute for uri %s",
8aefbd756763807188d2e3ce336a8680e4893066wrowe * r->path_info tracks the remaining source path.
8aefbd756763807188d2e3ce336a8680e4893066wrowe * r->filename tracks the path as we build it.
8aefbd756763807188d2e3ce336a8680e4893066wrowe * we begin our adventure at the root...
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe if ((rv = apr_filepath_merge(&entry_dir, NULL, r->filename,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, 0, r,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe "Module bug? Request filename path %s is invalid or "
a8d11d78181478da6a672f7fbc58b8d523351f49wrowe "or not absolute for uri %s",
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * Go down the directory hierarchy. Where we have to check for symlinks,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * do so. Where a .htaccess file has permission to override anything,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * try to find one.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe cache = prep_walk_cache("ap_directory_walk::cache", r);
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe entry_dir = ap_make_dirstr_parent(r->pool, entry_dir);
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe entry_dir = apr_pstrcat(r->pool, r->filename, "/", NULL);
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* If we have a file already matches the path of r->filename,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * and the vhost's list of directory sections hasn't changed,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * we can skip rewalking the directory_walk entries.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* Well this looks really familiar! If our end-result (per_dir_result)
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * didn't change, we have absolutely nothing to do :)
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * Otherwise (as is the case with most dir_merged/file_merged requests)
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * we must merge our dir_conf_merged onto this new r->per_dir_config.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* We start now_merged from NULL since we want to build
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * a locations list that can be merged to any vhost.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * We must play our own mimi-merge game here, for the few
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * running dir_config values we care about within dir_walk.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * We didn't start the merge from r->per_dir_config, so we
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * accumulate opts and override as we merge, from the globals.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe this_dir = ap_get_module_config(r->per_dir_config, &core_module);
59513b1275fdc2021d4949ee03ae8229469abb86wrowe /* XXX: Remerge path_info, or we are broken. Needs more thought.
59513b1275fdc2021d4949ee03ae8229469abb86wrowe r->path_info = ap_make_full_path(r->pool, r->filename,
38bcc87d9a06e8ba81165421403f275eca4e313btrawick (const char **)&r->path_info,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe buflen = strlen(r->filename) + strlen(r->path_info) + 1;
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe r->finfo.filetype = APR_DIR; /* It's the root, of course it's a dir */
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * seg keeps track of which segment we've copied.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * sec_idx keeps track of which section we're on, since sections are
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * ordered by number of segments. See core_reorder_directories
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* We have no trailing slash, but we sure would appreciate one...
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe if (sec_idx && r->filename[strlen(r->filename)-1] != '/')
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* Begin *this* level by looking for matching <Directory> sections
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * from the server config.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe entry_core = ap_get_module_config(entry_config, &core_module);
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* No more possible matches for this many segments?
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * We are done when we find relative/regex/longer components.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* We will never skip '0' element components, e.g. plain old
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * <Directory >, and <Directory "/"> are classified as zero
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * so that Win32/Netware/OS2 etc all pick them up.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * Otherwise, skip over the mismatches.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe ? (apr_fnmatch(entry_core->d, r->filename, FNM_PATHNAME) != APR_SUCCESS)
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* If we merged this same section last time, reuse it
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* We fell out of sync. This is our own copy of walked,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * so truncate the remaining matches and reset remaining.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe last_walk = (walk_walked_t*)apr_array_push(cache->walked);
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* Do a mini-merge to our globally-based running calculations of
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * core_dir->override and core_dir->opts, since now_merged
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * never considered the global config. Of course, if there is no
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * core config at this level, continue without a thought.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * See core.c::merge_core_dir_configs() for explanation.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe this_dir = ap_get_module_config(sec_ent[sec_idx], &core_module);
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe opts_add = (opts_add & ~this_dir->opts_remove) | this_dir->opts_add;
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* If .htaccess files are enabled, check for one, provided we
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * have reached a real path.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* If we merged this same htaccess last time, reuse it...
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * this wouldn't work except that we cache the htaccess
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * sections for the lifetime of the request, so we match
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * the same conf. Good planning (no, pure luck ;)
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* We fell out of sync. This is our own copy of walked,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * so truncate the remaining matches and reset remaining.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe last_walk = (walk_walked_t*)apr_array_push(cache->walked);
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* Do a mini-merge to our globally-based running calculations of
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * core_dir->override and core_dir->opts, since now_merged
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * never considered the global config. Of course, if there is no
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * core config at this level, continue without a thought.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * See core.c::merge_core_dir_configs() for explanation.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe this_dir = ap_get_module_config(htaccess_conf, &core_module);
2787ef5edc27fa4f6777ba8d51aa48fd9fdf54bbwrowe opts_add = (opts_add & ~this_dir->opts_remove) | this_dir->opts_add;
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* That temporary trailing slash was useful, now drop it.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* Time for all good things to come to an end?
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* Now it's time for the next segment...
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * We will assume the next element is an end node, and fix it up
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * below as necessary...
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe delim = strchr(r->path_info + (*r->path_info == '/' ? 1 : 0), '/');
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* If nothing remained but a '/' string, we are finished
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* XXX: Optimization required:
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * If...we have allowed symlinks, and
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * if...we find the segment exists in the directory list
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * skip the lstat and dummy up an APR_DIR value for r->finfo
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * this means case sensitive platforms go quite quickly.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * Case insensitive platforms might be given the wrong path,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * but if it's not found in the cache, then we know we have
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * something to test (the misspelling is never cached.)
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* We choose apr_lstat here, rather that apr_stat, so that we
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * capture this path object rather than its target. We will
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * replace the info with our target's info below. We especially
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * want the name of this 'link' object, not the name of its
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * target, if we are fixing case.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe rv = apr_lstat(&r->finfo, r->filename, APR_FINFO_MIN | APR_FINFO_NAME, r->pool);
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* Nothing? That could be nice. But our directory walk is done.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* If we hit ENOTDIR, we must have over-optimized, deny
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * rather than assume not found.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* Fix up the path now if we have a name, and they don't agree
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* TODO: provide users an option that an internal/external
cadddb2c31d24d48f4017db4df0a29687432326cwrowe * redirect is required here? We need to walk the URI and
cadddb2c31d24d48f4017db4df0a29687432326cwrowe * filename in tandem to properly correlate these.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* Is this an possibly acceptable symlink?
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* Ok, we are done with the link's info, test the real target
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* That was fun, nothing left for us here
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe "symlink doesn't point to a file or directory: %s",
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * Now we'll deal with the regexes, note we pick up sec_idx
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * where we left off (we gave up after we hit entry_core->r)
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe if (ap_regexec(entry_core->r, r->filename, 0, NULL, REG_NOTEOL))
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* If we merged this same section last time, reuse it
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* We fell out of sync. This is our own copy of walked,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * so truncate the remaining matches and reset remaining.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe last_walk = (walk_walked_t*)apr_array_push(cache->walked);
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe /* Whoops - everything matched in sequence, but the original walk
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe * found some additional matches. Truncate them.
8aefbd756763807188d2e3ce336a8680e4893066wrowe/* It seems this shouldn't be needed anymore. We translated the symlink above
8aefbd756763807188d2e3ce336a8680e4893066wrowe x into a real resource, and should have died up there. Even if we keep this,
8aefbd756763807188d2e3ce336a8680e4893066wrowe x it needs more thought (maybe an r->file_is_symlink) perhaps it should actually
8aefbd756763807188d2e3ce336a8680e4893066wrowe x happen in file_walk, so we catch more obscure cases in autoindex sub requests, etc.
8aefbd756763807188d2e3ce336a8680e4893066wrowe x * Symlink permissions are determined by the parent. If the request is
8aefbd756763807188d2e3ce336a8680e4893066wrowe x * for a directory then applying the symlink test here would use the
8aefbd756763807188d2e3ce336a8680e4893066wrowe x * permissions of the directory as opposed to its parent. Consider a
8aefbd756763807188d2e3ce336a8680e4893066wrowe x * symlink pointing to a dir with a .htaccess disallowing symlinks. If
8aefbd756763807188d2e3ce336a8680e4893066wrowe x * you access /symlink (or /symlink/) you would get a 403 without this
5bb29f57ae0184d2b3c1cdf35132f8ceb011f882wrowe x * APR_DIR test. But if you accessed /symlink/index.html, for example,
8aefbd756763807188d2e3ce336a8680e4893066wrowe x * you would *not* get the 403.
8aefbd756763807188d2e3ce336a8680e4893066wrowe x if (r->finfo.filetype != APR_DIR
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe x && (res = resolve_symlink(r->filename, r->info, ap_allow_options(r), r->pool))) {
8aefbd756763807188d2e3ce336a8680e4893066wrowe x ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r,
8aefbd756763807188d2e3ce336a8680e4893066wrowe x "Symbolic link not allowed: %s", r->filename);
8aefbd756763807188d2e3ce336a8680e4893066wrowe x return res;
0540a0b469147b52e858587270dba31c2aaa9e09wrowe cache->cached = ap_make_dirstr_parent(r->pool, r->filename);
0540a0b469147b52e858587270dba31c2aaa9e09wrowe /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
0540a0b469147b52e858587270dba31c2aaa9e09wrowe * and note the end result to (potentially) skip this step next time.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb core_server_config *sconf = ap_get_module_config(r->server->module_config,
0540a0b469147b52e858587270dba31c2aaa9e09wrowe ap_conf_vector_t **sec_ent = (ap_conf_vector_t **) sconf->sec_url->elts;
948096a99010fccf648814fecf38f75c689172d7wrowe const char *entry_uri;
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe cache = prep_walk_cache("ap_location_walk::cache", r);
948096a99010fccf648814fecf38f75c689172d7wrowe /* No tricks here, there are no <Locations > to parse in this vhost.
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe * We won't destroy the cache, just in case _this_ redirect is later
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe * redirected again to a vhost with <Location > blocks to optimize.
948096a99010fccf648814fecf38f75c689172d7wrowe /* Location and LocationMatch differ on their behaviour w.r.t. multiple
948096a99010fccf648814fecf38f75c689172d7wrowe * slashes. Location matches multiple slashes with a single slash,
948096a99010fccf648814fecf38f75c689172d7wrowe * LocationMatch doesn't. An exception, for backwards brokenness is
948096a99010fccf648814fecf38f75c689172d7wrowe * absoluteURIs... in which case neither match multiple slashes.
948096a99010fccf648814fecf38f75c689172d7wrowe /* If we have an cache->cached location that matches r->uri,
948096a99010fccf648814fecf38f75c689172d7wrowe * and the vhost's list of locations hasn't changed, we can skip
948096a99010fccf648814fecf38f75c689172d7wrowe * rewalking the location_walk entries.
0540a0b469147b52e858587270dba31c2aaa9e09wrowe if (cache->cached && (cache->dir_conf_tested == sec_ent)
948096a99010fccf648814fecf38f75c689172d7wrowe /* Well this looks really familiar! If our end-result (per_dir_result)
948096a99010fccf648814fecf38f75c689172d7wrowe * didn't change, we have absolutely nothing to do :)
948096a99010fccf648814fecf38f75c689172d7wrowe * Otherwise (as is the case with most dir_merged/file_merged requests)
948096a99010fccf648814fecf38f75c689172d7wrowe * we must merge our dir_conf_merged onto this new r->per_dir_config.
948096a99010fccf648814fecf38f75c689172d7wrowe /* We start now_merged from NULL since we want to build
948096a99010fccf648814fecf38f75c689172d7wrowe * a locations list that can be merged to any vhost.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
948096a99010fccf648814fecf38f75c689172d7wrowe /* Go through the location entries, and check for matches.
948096a99010fccf648814fecf38f75c689172d7wrowe * We apply the directive sections in given order, we should
948096a99010fccf648814fecf38f75c689172d7wrowe * really try them with the most general first.
0540a0b469147b52e858587270dba31c2aaa9e09wrowe entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
aa047239dedf0d26e8efecfade32e7337f35df19wrowe /* ### const strlen can be optimized in location config parsing */
053497224246c4dbef9af594cacf5c00ed271e6cwrowe /* Test the regex, fnmatch or string as appropriate.
053497224246c4dbef9af594cacf5c00ed271e6cwrowe * If it's a strcmp, and the <Location > pattern was
053497224246c4dbef9af594cacf5c00ed271e6cwrowe * not slash terminated, then this uri must be slash
053497224246c4dbef9af594cacf5c00ed271e6cwrowe * terminated (or at the end of the string) to match.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe ? apr_fnmatch(entry_core->d, cache->cached, FNM_PATHNAME)
948096a99010fccf648814fecf38f75c689172d7wrowe /* If we merged this same section last time, reuse it
948096a99010fccf648814fecf38f75c689172d7wrowe /* We fell out of sync. This is our own copy of walked,
948096a99010fccf648814fecf38f75c689172d7wrowe * so truncate the remaining matches and reset remaining.
948096a99010fccf648814fecf38f75c689172d7wrowe last_walk = (walk_walked_t*)apr_array_push(cache->walked);
948096a99010fccf648814fecf38f75c689172d7wrowe /* Whoops - everything matched in sequence, but the original walk
948096a99010fccf648814fecf38f75c689172d7wrowe * found some additional matches. Truncate them.
948096a99010fccf648814fecf38f75c689172d7wrowe /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
948096a99010fccf648814fecf38f75c689172d7wrowe * and note the end result to (potentially) skip this step next time.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe core_dir_config *dconf = ap_get_module_config(r->per_dir_config,
0540a0b469147b52e858587270dba31c2aaa9e09wrowe ap_conf_vector_t **sec_ent = (ap_conf_vector_t **) dconf->sec_file->elts;
aa047239dedf0d26e8efecfade32e7337f35df19wrowe const char *test_file;
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe /* To allow broken modules to proceed, we allow missing filenames to pass.
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe * We will catch it later if it's heading for the core handler.
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe * directory_walk already posted an INFO note for module debugging.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe /* No tricks here, there are just no <Files > to parse in this context.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * We won't destroy the cache, just in case _this_ redirect is later
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * redirected again to a context containing the same or similar <Files >.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe /* Get the basename .. and copy for the cache just
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * in case r->filename is munged by another module
aa047239dedf0d26e8efecfade32e7337f35df19wrowe /* If we have an cache->cached file name that matches test_file,
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * and the directory's list of file sections hasn't changed, we
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * can skip rewalking the file_walk entries.
0540a0b469147b52e858587270dba31c2aaa9e09wrowe if (cache->cached && (cache->dir_conf_tested == sec_ent)
aa047239dedf0d26e8efecfade32e7337f35df19wrowe /* Well this looks really familiar! If our end-result (per_dir_result)
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * didn't change, we have absolutely nothing to do :)
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * Otherwise (as is the case with most dir_merged requests)
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * we must merge our dir_conf_merged onto this new r->per_dir_config.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe /* We start now_merged from NULL since we want to build
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * a file section list that can be merged to any dir_walk.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
aa047239dedf0d26e8efecfade32e7337f35df19wrowe /* Go through the location entries, and check for matches.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * We apply the directive sections in given order, we should
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * really try them with the most general first.
0540a0b469147b52e858587270dba31c2aaa9e09wrowe entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
aa047239dedf0d26e8efecfade32e7337f35df19wrowe ? ap_regexec(entry_core->r, cache->cached , 0, NULL, 0)
aa047239dedf0d26e8efecfade32e7337f35df19wrowe ? apr_fnmatch(entry_core->d, cache->cached, FNM_PATHNAME)
aa047239dedf0d26e8efecfade32e7337f35df19wrowe /* If we merged this same section last time, reuse it
aa047239dedf0d26e8efecfade32e7337f35df19wrowe /* We fell out of sync. This is our own copy of walked,
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * so truncate the remaining matches and reset remaining.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe last_walk = (walk_walked_t*)apr_array_push(cache->walked);
aa047239dedf0d26e8efecfade32e7337f35df19wrowe /* Whoops - everything matched in sequence, but the original walk
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * found some additional matches. Truncate them.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
aa047239dedf0d26e8efecfade32e7337f35df19wrowe * and note the end result to (potentially) skip this step next time.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb/*****************************************************************
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * The sub_request mechanism.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * Fns to look up a relative URI from, e.g., a map file or SSI document.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * These do all access checks, etc., but don't actually run the transaction
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * ... use run_sub_req below for that. Also, be sure to use destroy_sub_req
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * as appropriate if you're likely to be creating more than a few of these.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * (An early Apache version didn't destroy the sub_reqs used in directory
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * indexing. The result, when indexing a directory with 800-odd files in
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * it, was massively excessive storage allocation).
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * Note more manipulation of protocol-specific vars in the request
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * structure...
b38846b15c8891c6dec44dcc4f96ca40721bf663rbbstatic request_rec *make_sub_request(const request_rec *r)
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowestatic void fill_in_sub_req_vars(request_rec *rnew, const request_rec *r,
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe rnew->request_config = ap_create_request_config(rnew->pool);
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe /* Start a clean config from this subrequest's vhost. Optimization in
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe * Location/File/Dir walks from the parent request assure that if the
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe * config blocks of the subrequest match the parent request, no merges
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe * will actually occur (and generally a minimal number of merges are
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe * required, even if the parent and subrequest aren't quite identical.)
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe rnew->allowed_methods = ap_make_method_list(rnew->pool, 2);
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe /* make a copy of the allowed-methods list */
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe ap_copy_method_list(rnew->allowed_methods, r->allowed_methods);
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe /* start with the same set of output filters */
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe ap_add_output_filter("SUBREQ_CORE", NULL, rnew, rnew->connection);
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe /* no input filters for a subrequest */
b38846b15c8891c6dec44dcc4f96ca40721bf663rbbAP_CORE_DECLARE_NONSTD(apr_status_t) ap_sub_req_output_filter(ap_filter_t *f,
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb /* Is there a require line configured for the type of *this* req? */
48d2edbfb84e5559b5da0f8d614ccab805cc67a8rbb if (reqs[i].method_mask & (AP_METHOD_BIT << r->method_number))
b67fb549910fa0faf4cdd8aeaf9aeab51d4b6a92wroweAP_DECLARE(request_rec *) ap_sub_req_method_uri(const char *method,
b67fb549910fa0faf4cdd8aeaf9aeab51d4b6a92wrowe const char *new_file,
1ab995011876f631740d68d960a6d729ddff5bfawrowe /* We have to run this after fill_in_sub_req_vars, or the r->main
b45c1c292ff1fa635004ae81fa691f8cb3cdda85rbb * pointer won't be setup
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb /* would be nicer to pass "method" to ap_set_sub_req_protocol */
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb udir = ap_escape_uri(rnew->pool, udir); /* re-escape it */
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb ap_parse_uri(rnew, ap_make_full_path(rnew->pool, udir, new_file));
b38846b15c8891c6dec44dcc4f96ca40721bf663rbbAP_DECLARE(request_rec *) ap_sub_req_lookup_uri(const char *new_file,
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb return ap_sub_req_method_uri("GET", new_file, r, next_filter);
efa1a34b0a7785fc72863eff175b0cfc1ecb0e38wroweAP_DECLARE(request_rec *) ap_sub_req_lookup_dirent(const apr_finfo_t *dirent,
1ab995011876f631740d68d960a6d729ddff5bfawrowe /* We have to run this after fill_in_sub_req_vars, or the r->main
117026201e6d8fe7d82416b8a7324830f5a87292wrowe * pointer won't be setup
cadddb2c31d24d48f4017db4df0a29687432326cwrowe /* Special case: we are looking at a relative lookup in the same directory.
cadddb2c31d24d48f4017db4df0a29687432326cwrowe * This is 100% safe, since dirent->name just came from the filesystem.
6c24fd6cfe148639988d5b335185ffb215662801wrowe rnew->uri = ap_make_full_path(rnew->pool, udir, dirent->name);
cadddb2c31d24d48f4017db4df0a29687432326cwrowe fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
117026201e6d8fe7d82416b8a7324830f5a87292wrowe rnew->filename = ap_make_full_path(rnew->pool, fdir, dirent->name);
cadddb2c31d24d48f4017db4df0a29687432326cwrowe /* XXX This is now less relevant; we will do a full location walk
cadddb2c31d24d48f4017db4df0a29687432326cwrowe * these days for this case. Preserve the apr_stat results, and
cadddb2c31d24d48f4017db4df0a29687432326cwrowe * perhaps we also tag that symlinks were tested and/or found for
cadddb2c31d24d48f4017db4df0a29687432326cwrowe * r->filename.
efa1a34b0a7785fc72863eff175b0cfc1ecb0e38wrowe if ((dirent->valid & APR_FINFO_MIN) != APR_FINFO_MIN) {
beda1fb2f11c52ca4612460a5d5ba47398143efbwrowe * apr_dir_read isn't very complete on this platform, so
beda1fb2f11c52ca4612460a5d5ba47398143efbwrowe * we need another apr_lstat (or simply apr_stat if we allow
beda1fb2f11c52ca4612460a5d5ba47398143efbwrowe * all symlinks here.) If this is an APR_LNK that resolves
beda1fb2f11c52ca4612460a5d5ba47398143efbwrowe * to an APR_DIR, then we will rerun everything anyways...
beda1fb2f11c52ca4612460a5d5ba47398143efbwrowe * this should be safe.
cadddb2c31d24d48f4017db4df0a29687432326cwrowe * Resolve this symlink. We should tie this back to dir_walk's cache
cadddb2c31d24d48f4017db4df0a29687432326cwrowe if (!(res = resolve_symlink(rnew->filename, &rnew->finfo,
cadddb2c31d24d48f4017db4df0a29687432326cwrowe /* ### Would be real nice if apr_make_full_path overallocated
cadddb2c31d24d48f4017db4df0a29687432326cwrowe * the buffer by one character instead of a complete copy.
cadddb2c31d24d48f4017db4df0a29687432326cwrowe rnew->filename = apr_pstrcat(rnew->pool, rnew->filename, "/", NULL);
cadddb2c31d24d48f4017db4df0a29687432326cwrowe rnew->uri = ap_make_full_path(rnew->pool, rnew->uri, "/", NULL);
cadddb2c31d24d48f4017db4df0a29687432326cwrowe ap_parse_uri(rnew, rnew->uri); /* fill in parsed_uri values */
b67fb549910fa0faf4cdd8aeaf9aeab51d4b6a92wroweAP_DECLARE(request_rec *) ap_sub_req_lookup_file(const char *new_file,
1ab995011876f631740d68d960a6d729ddff5bfawrowe /* We have to run this after fill_in_sub_req_vars, or the r->main
b67fb549910fa0faf4cdd8aeaf9aeab51d4b6a92wrowe * pointer won't be setup
ecc4a080f07af3fbc1b91bbd00997ec1d592c6f9wrowe /* Translate r->filename, if it was canonical, it stays canonical
5bb29f57ae0184d2b3c1cdf35132f8ceb011f882wrowe if (apr_filepath_merge(&rnew->filename, fdir, new_file,
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * Check for a special case... if there are no '/' characters in new_file
5bb29f57ae0184d2b3c1cdf35132f8ceb011f882wrowe * at all, and the path was the same, then we are looking at a relative
5b3abd2fecc712f08ad728114aa77137b9f67716wrowe * lookup in the same directory. Fixup the URI to match.
0540a0b469147b52e858587270dba31c2aaa9e09wrowe && ap_strchr_c(rnew->filename + fdirlen, '/') == NULL)
0540a0b469147b52e858587270dba31c2aaa9e09wrowe char *udir = ap_make_dirstr_parent(rnew->pool, r->uri);
0540a0b469147b52e858587270dba31c2aaa9e09wrowe rnew->uri = ap_make_full_path(rnew->pool, udir, rnew->filename + fdirlen);
0540a0b469147b52e858587270dba31c2aaa9e09wrowe ap_parse_uri(rnew, rnew->uri); /* fill in parsed_uri values */
0540a0b469147b52e858587270dba31c2aaa9e09wrowe ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */
5b3abd2fecc712f08ad728114aa77137b9f67716wrowe /* XXX: @@@: What should be done with the parsed_uri values?
5b3abd2fecc712f08ad728114aa77137b9f67716wrowe * We would be better off stripping down to the 'common' elements
5b3abd2fecc712f08ad728114aa77137b9f67716wrowe * of the path, then reassembling the URI as best as we can.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * XXX: this should be set properly like it is in the same-dir case
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * but it's actually sometimes to impossible to do it... because the
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * file may not have a uri associated with it -djg
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb /* Reclaim the space */
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * Function to set the r->mtime field to the specified value if it's later
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * than what's already there.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbbAP_DECLARE(void) ap_update_mtime(request_rec *r, apr_time_t dependency_mtime)
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb * Is it the initial main request, which we only get *once* per HTTP request?
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb (r->main == NULL) /* otherwise, this is a sub-request */
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb (r->prev == NULL); /* otherwise, this is an internal redirect */