diff options
Diffstat (limited to 'rubbos/app/httpd-2.0.64/server/request.c')
| -rw-r--r-- | rubbos/app/httpd-2.0.64/server/request.c | 1888 |
1 files changed, 0 insertions, 1888 deletions
diff --git a/rubbos/app/httpd-2.0.64/server/request.c b/rubbos/app/httpd-2.0.64/server/request.c deleted file mode 100644 index ef3a3042..00000000 --- a/rubbos/app/httpd-2.0.64/server/request.c +++ /dev/null @@ -1,1888 +0,0 @@ -/* Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -/* - * http_request.c: functions to get and process requests - * - * Rob McCool 3/21/93 - * - * Thoroughly revamped by rst for Apache. NB this file reads - * best from the bottom up. - * - */ - -#include "apr_strings.h" -#include "apr_file_io.h" -#include "apr_fnmatch.h" - -#define APR_WANT_STRFUNC -#include "apr_want.h" - -#define CORE_PRIVATE -#include "ap_config.h" -#include "httpd.h" -#include "http_config.h" -#include "http_request.h" -#include "http_core.h" -#include "http_protocol.h" -#include "http_log.h" -#include "http_main.h" -#include "util_filter.h" -#include "util_charset.h" -#include "util_script.h" - -#include "mod_core.h" - -#if APR_HAVE_STDARG_H -#include <stdarg.h> -#endif - -APR_HOOK_STRUCT( - APR_HOOK_LINK(translate_name) - APR_HOOK_LINK(map_to_storage) - APR_HOOK_LINK(check_user_id) - APR_HOOK_LINK(fixups) - APR_HOOK_LINK(type_checker) - APR_HOOK_LINK(access_checker) - APR_HOOK_LINK(auth_checker) - APR_HOOK_LINK(insert_filter) - APR_HOOK_LINK(create_request) -) - -AP_IMPLEMENT_HOOK_RUN_FIRST(int,translate_name, - (request_rec *r), (r), DECLINED) -AP_IMPLEMENT_HOOK_RUN_FIRST(int,map_to_storage, - (request_rec *r), (r), DECLINED) -AP_IMPLEMENT_HOOK_RUN_FIRST(int,check_user_id, - (request_rec *r), (r), DECLINED) -AP_IMPLEMENT_HOOK_RUN_ALL(int,fixups, - (request_rec *r), (r), OK, DECLINED) -AP_IMPLEMENT_HOOK_RUN_FIRST(int,type_checker, - (request_rec *r), (r), DECLINED) -AP_IMPLEMENT_HOOK_RUN_ALL(int,access_checker, - (request_rec *r), (r), OK, DECLINED) -AP_IMPLEMENT_HOOK_RUN_FIRST(int,auth_checker, - (request_rec *r), (r), DECLINED) -AP_IMPLEMENT_HOOK_VOID(insert_filter, (request_rec *r), (r)) -AP_IMPLEMENT_HOOK_RUN_ALL(int, create_request, - (request_rec *r), (r), OK, DECLINED) - - -static int decl_die(int status, char *phase, request_rec *r) -{ - if (status == DECLINED) { - ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, - "configuration error: couldn't %s: %s", phase, r->uri); - return HTTP_INTERNAL_SERVER_ERROR; - } - else { - return status; - } -} - -/* This is the master logic for processing requests. Do NOT duplicate - * this logic elsewhere, or the security model will be broken by future - * API changes. Each phase must be individually optimized to pick up - * redundant/duplicate calls by subrequests, and redirects. - */ -AP_DECLARE(int) ap_process_request_internal(request_rec *r) -{ - int file_req = (r->main && r->filename); - int access_status; - - /* Ignore embedded %2F's in path for proxy requests */ - if (!r->proxyreq && r->parsed_uri.path) { - core_dir_config *d; - d = ap_get_module_config(r->per_dir_config, &core_module); - if (d->allow_encoded_slashes) { - access_status = ap_unescape_url_keep2f(r->parsed_uri.path); - } - else { - access_status = ap_unescape_url(r->parsed_uri.path); - } - if (access_status) { - if (access_status == HTTP_NOT_FOUND) { - if (! d->allow_encoded_slashes) { - ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, - "found %%2f (encoded '/') in URI " - "(decoded='%s'), returning 404", - r->parsed_uri.path); - } - } - return access_status; - } - } - - ap_getparents(r->uri); /* OK --- shrinking transformations... */ - - /* All file subrequests are a huge pain... they cannot bubble through the - * next several steps. Only file subrequests are allowed an empty uri, - * otherwise let translate_name kill the request. - */ - if (!file_req) { - if ((access_status = ap_location_walk(r))) { - return access_status; - } - - if ((access_status = ap_run_translate_name(r))) { - return decl_die(access_status, "translate", r); - } - } - - /* Reset to the server default config prior to running map_to_storage - */ - r->per_dir_config = r->server->lookup_defaults; - - if ((access_status = ap_run_map_to_storage(r))) { - /* This request wasn't in storage (e.g. TRACE) */ - return access_status; - } - - /* Excluding file-specific requests with no 'true' URI... - */ - if (!file_req) { - /* Rerun the location walk, which overrides any map_to_storage config. - */ - if ((access_status = ap_location_walk(r))) { - return access_status; - } - } - - /* Only on the main request! */ - if (r->main == NULL) { - if ((access_status = ap_run_header_parser(r))) { - return access_status; - } - } - - /* Skip authn/authz if the parent or prior request passed the authn/authz, - * and that configuration didn't change (this requires optimized _walk() - * functions in map_to_storage that use the same merge results given - * identical input.) If the config changes, we must re-auth. - */ - if (r->main && (r->main->per_dir_config == r->per_dir_config)) { - r->user = r->main->user; - r->ap_auth_type = r->main->ap_auth_type; - } - else if (r->prev && (r->prev->per_dir_config == r->per_dir_config)) { - r->user = r->prev->user; - r->ap_auth_type = r->prev->ap_auth_type; - } - else { - switch (ap_satisfies(r)) { - case SATISFY_ALL: - case SATISFY_NOSPEC: - if ((access_status = ap_run_access_checker(r)) != 0) { - return decl_die(access_status, "check access", r); - } - - if (ap_some_auth_required(r)) { - if (((access_status = ap_run_check_user_id(r)) != 0) - || !ap_auth_type(r)) { - return decl_die(access_status, ap_auth_type(r) - ? "check user. No user file?" - : "perform authentication. AuthType not set!", - r); - } - - if (((access_status = ap_run_auth_checker(r)) != 0) - || !ap_auth_type(r)) { - return decl_die(access_status, ap_auth_type(r) - ? "check access. No groups file?" - : "perform authentication. AuthType not set!", - r); - } - } - break; - - case SATISFY_ANY: - if (((access_status = ap_run_access_checker(r)) != 0)) { - if (!ap_some_auth_required(r)) { - return decl_die(access_status, "check access", r); - } - - if (((access_status = ap_run_check_user_id(r)) != 0) - || !ap_auth_type(r)) { - return decl_die(access_status, ap_auth_type(r) - ? "check user. No user file?" - : "perform authentication. AuthType not set!", - r); - } - - if (((access_status = ap_run_auth_checker(r)) != 0) - || !ap_auth_type(r)) { - return decl_die(access_status, ap_auth_type(r) - ? "check access. No groups file?" - : "perform authentication. AuthType not set!", - r); - } - } - break; - } - } - /* XXX Must make certain the ap_run_type_checker short circuits mime - * in mod-proxy for r->proxyreq && r->parsed_uri.scheme - * && !strcmp(r->parsed_uri.scheme, "http") - */ - if ((access_status = ap_run_type_checker(r)) != 0) { - return decl_die(access_status, "find types", r); - } - - if ((access_status = ap_run_fixups(r)) != 0) { - return access_status; - } - - return OK; -} - - -/* Useful caching structures to repeat _walk/merge sequences as required - * when a subrequest or redirect reuses substantially the same config. - * - * Directive order in the httpd.conf file and its Includes significantly - * impact this optimization. Grouping common blocks at the front of the - * config that are less likely to change between a request and - * its subrequests, or between a request and its redirects reduced - * the work of these functions significantly. - */ - -typedef struct walk_walked_t { - ap_conf_vector_t *matched; /* A dir_conf sections we matched */ - ap_conf_vector_t *merged; /* The dir_conf merged result */ -} walk_walked_t; - -typedef struct walk_cache_t { - const char *cached; /* The identifier we matched */ - ap_conf_vector_t **dir_conf_tested; /* The sections we matched against */ - ap_conf_vector_t *dir_conf_merged; /* Base per_dir_config */ - ap_conf_vector_t *per_dir_result; /* per_dir_config += walked result */ - apr_array_header_t *walked; /* The list of walk_walked_t results */ -} walk_cache_t; - -static walk_cache_t *prep_walk_cache(apr_size_t t, request_rec *r) -{ - walk_cache_t *cache; - void **note; - - /* Find the most relevant, recent entry to work from. That would be - * this request (on the second call), or the parent request of a - * subrequest, or the prior request of an internal redirect. Provide - * this _walk()er with a copy it is allowed to munge. If there is no - * parent or prior cached request, then create a new walk cache. - */ - note = ap_get_request_note(r, t); - if (!note) { - return NULL; - } - - if (!(cache = *note)) { - void **inherit_note; - - if ((r->main - && ((inherit_note = ap_get_request_note(r->main, t))) - && *inherit_note) - || (r->prev - && ((inherit_note = ap_get_request_note(r->prev, t))) - && *inherit_note)) { - cache = apr_pmemdup(r->pool, *inherit_note, - sizeof(*cache)); - cache->walked = apr_array_copy(r->pool, cache->walked); - } - else { - cache = apr_pcalloc(r->pool, sizeof(*cache)); - cache->walked = apr_array_make(r->pool, 4, sizeof(walk_walked_t)); - } - - *note = cache; - } - return cache; -} - -/***************************************************************** - * - * Getting and checking directory configuration. Also checks the - * FollowSymlinks and FollowSymOwner stuff, since this is really the - * only place that can happen (barring a new mid_dir_walk callout). - * - * We can't do it as an access_checker module function which gets - * called with the final per_dir_config, since we could have a directory - * with FollowSymLinks disabled, which contains a symlink to another - * with a .htaccess file which turns FollowSymLinks back on --- and - * access in such a case must be denied. So, whatever it is that - * checks FollowSymLinks needs to know the state of the options as - * they change, all the way down. - */ - - -/* - * resolve_symlink must _always_ be called on an APR_LNK file type! - * It will resolve the actual target file type, modification date, etc, - * and provide any processing required for symlink evaluation. - * Path must already be cleaned, no trailing slash, no multi-slashes, - * and don't call this on the root! - * - * Simply, the number of times we deref a symlink are minimal compared - * to the number of times we had an extra lstat() since we 'weren't sure'. - * - * To optimize, we stat() anything when given (opts & OPT_SYM_LINKS), otherwise - * we start off with an lstat(). Every lstat() must be dereferenced in case - * it points at a 'nasty' - we must always rerun check_safe_file (or similar.) - */ -static int resolve_symlink(char *d, apr_finfo_t *lfi, int opts, apr_pool_t *p) -{ - apr_finfo_t fi; - int res; - const char *savename; - - if (!(opts & (OPT_SYM_OWNER | OPT_SYM_LINKS))) { - return HTTP_FORBIDDEN; - } - - /* Save the name from the valid bits. */ - savename = (lfi->valid & APR_FINFO_NAME) ? lfi->name : NULL; - - if (opts & OPT_SYM_LINKS) { - if ((res = apr_stat(&fi, d, lfi->valid & ~(APR_FINFO_NAME - | APR_FINFO_LINK), p)) - != APR_SUCCESS) { - return HTTP_FORBIDDEN; - } - - /* Give back the target */ - memcpy(lfi, &fi, sizeof(fi)); - if (savename) { - lfi->name = savename; - lfi->valid |= APR_FINFO_NAME; - } - - return OK; - } - - /* OPT_SYM_OWNER only works if we can get the owner of - * both the file and symlink. First fill in a missing - * owner of the symlink, then get the info of the target. - */ - if (!(lfi->valid & APR_FINFO_OWNER)) { - if ((res = apr_lstat(&fi, d, lfi->valid | APR_FINFO_OWNER, p)) - != APR_SUCCESS) { - return HTTP_FORBIDDEN; - } - } - - if ((res = apr_stat(&fi, d, lfi->valid & ~(APR_FINFO_NAME), p)) - != APR_SUCCESS) { - return HTTP_FORBIDDEN; - } - - if (apr_compare_users(fi.user, lfi->user) != APR_SUCCESS) { - return HTTP_FORBIDDEN; - } - - /* Give back the target */ - memcpy(lfi, &fi, sizeof(fi)); - if (savename) { - lfi->name = savename; - lfi->valid |= APR_FINFO_NAME; - } - - return OK; -} - - -/* - * As we walk the directory configuration, the merged config won't - * be 'rooted' to a specific vhost until the very end of the merge. - * - * We need a very fast mini-merge to a real, vhost-rooted merge - * of core.opts and core.override, the only options tested within - * directory_walk itself. - * - * See core.c::merge_core_dir_configs() for explanation. - */ - -typedef struct core_opts_t { - allow_options_t opts; - allow_options_t add; - allow_options_t remove; - overrides_t override; -} core_opts_t; - -static void core_opts_merge(const ap_conf_vector_t *sec, core_opts_t *opts) -{ - core_dir_config *this_dir = ap_get_module_config(sec, &core_module); - - if (!this_dir) { - return; - } - - if (this_dir->opts & OPT_UNSET) { - opts->add = (opts->add & ~this_dir->opts_remove) - | this_dir->opts_add; - opts->remove = (opts->remove & ~this_dir->opts_add) - | this_dir->opts_remove; - opts->opts = (opts->opts & ~opts->remove) | opts->add; - } - else { - opts->opts = this_dir->opts; - opts->add = this_dir->opts_add; - opts->remove = this_dir->opts_remove; - } - - if (!(this_dir->override & OR_UNSET)) { - opts->override = this_dir->override; - } -} - - -/***************************************************************** - * - * Getting and checking directory configuration. Also checks the - * FollowSymlinks and FollowSymOwner stuff, since this is really the - * only place that can happen (barring a new mid_dir_walk callout). - * - * We can't do it as an access_checker module function which gets - * called with the final per_dir_config, since we could have a directory - * with FollowSymLinks disabled, which contains a symlink to another - * with a .htaccess file which turns FollowSymLinks back on --- and - * access in such a case must be denied. So, whatever it is that - * checks FollowSymLinks needs to know the state of the options as - * they change, all the way down. - */ - -AP_DECLARE(int) ap_directory_walk(request_rec *r) -{ - ap_conf_vector_t *now_merged = NULL; - core_server_config *sconf = ap_get_module_config(r->server->module_config, - &core_module); - ap_conf_vector_t **sec_ent = (ap_conf_vector_t **) sconf->sec_dir->elts; - int num_sec = sconf->sec_dir->nelts; - walk_cache_t *cache; - char *entry_dir; - apr_status_t rv; - - /* XXX: Better (faster) tests needed!!! - * - * "OK" as a response to a real problem is not _OK_, but to allow broken - * modules to proceed, we will permit the not-a-path filename to pass the - * following two tests. This behavior may be revoked in future versions - * of Apache. We still must catch it later if it's heading for the core - * handler. Leave INFO notes here for module debugging. - */ - if (r->filename == NULL) { - ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, - "Module bug? Request filename is missing for URI %s", - r->uri); - return OK; - } - - /* Canonicalize the file path without resolving filename case or aliases - * so we can begin by checking the cache for a recent directory walk. - * This call will ensure we have an absolute path in the same pass. - */ - if ((rv = apr_filepath_merge(&entry_dir, NULL, r->filename, - APR_FILEPATH_NOTRELATIVE, r->pool)) - != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, - "Module bug? Request filename path %s is invalid or " - "or not absolute for uri %s", - r->filename, r->uri); - return OK; - } - - /* XXX Notice that this forces path_info to be canonical. That might - * not be desired by all apps. However, some of those same apps likely - * have significant security holes. - */ - r->filename = entry_dir; - - cache = prep_walk_cache(AP_NOTE_DIRECTORY_WALK, r); - - /* If this is not a dirent subrequest with a preconstructed - * r->finfo value, then we can simply stat the filename to - * save burning mega-cycles with unneeded stats - if this is - * an exact file match. We don't care about failure... we - * will stat by component failing this meager attempt. - * - * It would be nice to distinguish APR_ENOENT from other - * types of failure, such as APR_ENOTDIR. We can do something - * with APR_ENOENT, knowing that the path is good. - */ - if (!r->finfo.filetype || r->finfo.filetype == APR_LNK) { - rv = apr_stat(&r->finfo, r->filename, APR_FINFO_MIN, r->pool); - - /* some OSs will return APR_SUCCESS/APR_REG if we stat - * a regular file but we have '/' at the end of the name; - * - * other OSs will return APR_ENOTDIR for that situation; - * - * handle it the same everywhere by simulating a failure - * if it looks like a directory but really isn't - * - * Also reset if the stat failed, just for safety. - */ - if ((rv != APR_SUCCESS) || - (r->finfo.filetype && - (r->finfo.filetype != APR_DIR) && - (r->filename[strlen(r->filename) - 1] == '/'))) { - r->finfo.filetype = 0; /* forget what we learned */ - } - } - - if (r->finfo.filetype == APR_REG) { - entry_dir = ap_make_dirstr_parent(r->pool, entry_dir); - } - else if (r->filename[strlen(r->filename) - 1] != '/') { - entry_dir = apr_pstrcat(r->pool, r->filename, "/", NULL); - } - - /* If we have a file already matches the path of r->filename, - * and the vhost's list of directory sections hasn't changed, - * we can skip rewalking the directory_walk entries. - */ - if (cache->cached - && ((r->finfo.filetype == APR_REG) - || ((r->finfo.filetype == APR_DIR) - && (!r->path_info || !*r->path_info))) - && (cache->dir_conf_tested == sec_ent) - && (strcmp(entry_dir, cache->cached) == 0)) { - /* Well this looks really familiar! If our end-result (per_dir_result) - * didn't change, we have absolutely nothing to do :) - * Otherwise (as is the case with most dir_merged/file_merged requests) - * we must merge our dir_conf_merged onto this new r->per_dir_config. - */ - if (r->per_dir_config == cache->per_dir_result) { - return OK; - } - - if (r->per_dir_config == cache->dir_conf_merged) { - r->per_dir_config = cache->per_dir_result; - return OK; - } - - if (cache->walked->nelts) { - now_merged = ((walk_walked_t*)cache->walked->elts) - [cache->walked->nelts - 1].merged; - } - } - else { - /* We start now_merged from NULL since we want to build - * a locations list that can be merged to any vhost. - */ - int sec_idx; - int matches = cache->walked->nelts; - walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts; - core_dir_config *this_dir; - core_opts_t opts; - apr_finfo_t thisinfo; - char *save_path_info; - apr_size_t buflen; - char *buf; - unsigned int seg, startseg; - - /* Invariant: from the first time filename_len is set until - * it goes out of scope, filename_len==strlen(r->filename) - */ - apr_size_t filename_len; -#ifdef CASE_BLIND_FILESYSTEM - apr_size_t canonical_len; -#endif - - /* - * We must play our own mini-merge game here, for the few - * running dir_config values we care about within dir_walk. - * We didn't start the merge from r->per_dir_config, so we - * accumulate opts and override as we merge, from the globals. - */ - this_dir = ap_get_module_config(r->per_dir_config, &core_module); - opts.opts = this_dir->opts; - opts.add = this_dir->opts_add; - opts.remove = this_dir->opts_remove; - opts.override = this_dir->override; - - /* Set aside path_info to merge back onto path_info later. - * If r->filename is a directory, we must remerge the path_info, - * before we continue! [Directories cannot, by defintion, have - * path info. Either the next segment is not-found, or a file.] - * - * r->path_info tracks the unconsumed source path. - * r->filename tracks the path as we process it - */ - if ((r->finfo.filetype == APR_DIR) && r->path_info && *r->path_info) - { - if ((rv = apr_filepath_merge(&r->path_info, r->filename, - r->path_info, - APR_FILEPATH_NOTABOVEROOT, r->pool)) - != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "dir_walk error, path_info %s is not relative " - "to the filename path %s for uri %s", - r->path_info, r->filename, r->uri); - return HTTP_INTERNAL_SERVER_ERROR; - } - - save_path_info = NULL; - } - else { - save_path_info = r->path_info; - r->path_info = r->filename; - } - -#ifdef CASE_BLIND_FILESYSTEM - - canonical_len = 0; - while (r->canonical_filename && r->canonical_filename[canonical_len] - && (r->canonical_filename[canonical_len] - == r->path_info[canonical_len])) { - ++canonical_len; - } - - while (canonical_len - && ((r->canonical_filename[canonical_len - 1] != '/' - && r->canonical_filename[canonical_len - 1]) - || (r->path_info[canonical_len - 1] != '/' - && r->path_info[canonical_len - 1]))) { - --canonical_len; - } - - /* - * Now build r->filename component by component, starting - * with the root (on Unix, simply "/"). We will make a huge - * assumption here for efficiency, that any canonical path - * already given included a canonical root. - */ - rv = apr_filepath_root((const char **)&r->filename, - (const char **)&r->path_info, - canonical_len ? 0 : APR_FILEPATH_TRUENAME, - r->pool); - filename_len = strlen(r->filename); - - /* - * Bad assumption above? If the root's length is longer - * than the canonical length, then it cannot be trusted as - * a truename. So try again, this time more seriously. - */ - if ((rv == APR_SUCCESS) && canonical_len - && (filename_len > canonical_len)) { - rv = apr_filepath_root((const char **)&r->filename, - (const char **)&r->path_info, - APR_FILEPATH_TRUENAME, r->pool); - filename_len = strlen(r->filename); - canonical_len = 0; - } - -#else /* ndef CASE_BLIND_FILESYSTEM, really this simple for Unix today; */ - - rv = apr_filepath_root((const char **)&r->filename, - (const char **)&r->path_info, - 0, r->pool); - filename_len = strlen(r->filename); - -#endif - - if (rv != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "dir_walk error, could not determine the root " - "path of filename %s%s for uri %s", - r->filename, r->path_info, r->uri); - return HTTP_INTERNAL_SERVER_ERROR; - } - - /* Working space for terminating null and an extra / is required. - */ - buflen = filename_len + strlen(r->path_info) + 2; - buf = apr_palloc(r->pool, buflen); - memcpy(buf, r->filename, filename_len + 1); - r->filename = buf; - thisinfo.valid = APR_FINFO_TYPE; - thisinfo.filetype = APR_DIR; /* It's the root, of course it's a dir */ - - /* - * seg keeps track of which segment we've copied. - * sec_idx keeps track of which section we're on, since sections are - * ordered by number of segments. See core_reorder_directories - * startseg tells us how many segments describe the root path - * e.g. the complete path "//host/foo/" to a UNC share (4) - */ - startseg = seg = ap_count_dirs(r->filename); - sec_idx = 0; - - /* - * Go down the directory hierarchy. Where we have to check for - * symlinks, do so. Where a .htaccess file has permission to - * override anything, try to find one. - */ - do { - int res; - char *seg_name; - char *delim; - int temp_slash=0; - - /* We have no trailing slash, but we sure would appreciate one. - * However, we don't want to append a / our first time through. - */ - if ((seg > startseg) && r->filename[filename_len-1] != '/') { - r->filename[filename_len++] = '/'; - r->filename[filename_len] = 0; - temp_slash=1; - } - - /* Begin *this* level by looking for matching <Directory> sections - * from the server config. - */ - for (; sec_idx < num_sec; ++sec_idx) { - - ap_conf_vector_t *entry_config = sec_ent[sec_idx]; - core_dir_config *entry_core; - entry_core = ap_get_module_config(entry_config, &core_module); - - /* No more possible matches for this many segments? - * We are done when we find relative/regex/longer components. - */ - if (entry_core->r || entry_core->d_components > seg) { - break; - } - - /* We will never skip '0' element components, e.g. plain old - * <Directory >, and <Directory "/"> are classified as zero - * so that Win32/Netware/OS2 etc all pick them up. - * Otherwise, skip over the mismatches. - */ - if (entry_core->d_components - && ((entry_core->d_components < seg) - || (entry_core->d_is_fnmatch - ? (apr_fnmatch(entry_core->d, r->filename, - FNM_PATHNAME) != APR_SUCCESS) - : (strcmp(r->filename, entry_core->d) != 0)))) { - continue; - } - - /* If we haven't continue'd above, we have a match. - * - * Calculate our full-context core opts & override. - */ - core_opts_merge(sec_ent[sec_idx], &opts); - - /* If we merged this same section last time, reuse it - */ - if (matches) { - if (last_walk->matched == sec_ent[sec_idx]) { - now_merged = last_walk->merged; - ++last_walk; - --matches; - continue; - } - - /* We fell out of sync. This is our own copy of walked, - * so truncate the remaining matches and reset remaining. - */ - cache->walked->nelts -= matches; - matches = 0; - } - - if (now_merged) { - now_merged = ap_merge_per_dir_configs(r->pool, - now_merged, - sec_ent[sec_idx]); - } - else { - now_merged = sec_ent[sec_idx]; - } - - last_walk = (walk_walked_t*)apr_array_push(cache->walked); - last_walk->matched = sec_ent[sec_idx]; - last_walk->merged = now_merged; - } - - /* If .htaccess files are enabled, check for one, provided we - * have reached a real path. - */ - do { /* Not really a loop, just a break'able code block */ - - ap_conf_vector_t *htaccess_conf = NULL; - - /* No htaccess in an incomplete root path, - * nor if it's disabled - */ - if (seg < startseg || !opts.override) { - break; - } - - res = ap_parse_htaccess(&htaccess_conf, r, opts.override, - apr_pstrdup(r->pool, r->filename), - sconf->access_name); - if (res) { - return res; - } - - if (!htaccess_conf) { - break; - } - - /* If we are still here, we found our htaccess. - * - * Calculate our full-context core opts & override. - */ - core_opts_merge(htaccess_conf, &opts); - - /* If we merged this same htaccess last time, reuse it... - * this wouldn't work except that we cache the htaccess - * sections for the lifetime of the request, so we match - * the same conf. Good planning (no, pure luck ;) - */ - if (matches) { - if (last_walk->matched == htaccess_conf) { - now_merged = last_walk->merged; - ++last_walk; - --matches; - break; - } - - /* We fell out of sync. This is our own copy of walked, - * so truncate the remaining matches and reset - * remaining. - */ - cache->walked->nelts -= matches; - matches = 0; - } - - if (now_merged) { - now_merged = ap_merge_per_dir_configs(r->pool, - now_merged, - htaccess_conf); - } - else { - now_merged = htaccess_conf; - } - - last_walk = (walk_walked_t*)apr_array_push(cache->walked); - last_walk->matched = htaccess_conf; - last_walk->merged = now_merged; - - } while (0); /* Only one htaccess, not a real loop */ - - /* That temporary trailing slash was useful, now drop it. - */ - if (temp_slash) { - r->filename[--filename_len] = '\0'; - } - - /* Time for all good things to come to an end? - */ - if (!r->path_info || !*r->path_info) { - break; - } - - /* Now it's time for the next segment... - * We will assume the next element is an end node, and fix it up - * below as necessary... - */ - - seg_name = r->filename + filename_len; - delim = strchr(r->path_info + (*r->path_info == '/' ? 1 : 0), '/'); - if (delim) { - size_t path_info_len = delim - r->path_info; - *delim = '\0'; - memcpy(seg_name, r->path_info, path_info_len + 1); - filename_len += path_info_len; - r->path_info = delim; - *delim = '/'; - } - else { - size_t path_info_len = strlen(r->path_info); - memcpy(seg_name, r->path_info, path_info_len + 1); - filename_len += path_info_len; - r->path_info += path_info_len; - } - if (*seg_name == '/') - ++seg_name; - - /* If nothing remained but a '/' string, we are finished - */ - if (!*seg_name) { - break; - } - - /* First optimization; - * If...we knew r->filename was a file, and - * if...we have strict (case-sensitive) filenames, or - * we know the canonical_filename matches to _this_ name, and - * if...we have allowed symlinks - * skip the lstat and dummy up an APR_DIR value for thisinfo. - */ - if (r->finfo.filetype -#ifdef CASE_BLIND_FILESYSTEM - && (filename_len <= canonical_len) -#endif - && ((opts.opts & (OPT_SYM_OWNER | OPT_SYM_LINKS)) == OPT_SYM_LINKS)) - { - - thisinfo.filetype = APR_DIR; - ++seg; - continue; - } - - /* We choose apr_lstat here, rather that apr_stat, so that we - * capture this path object rather than its target. We will - * replace the info with our target's info below. We especially - * want the name of this 'link' object, not the name of its - * target, if we are fixing the filename case/resolving aliases. - */ - rv = apr_lstat(&thisinfo, r->filename, - APR_FINFO_MIN | APR_FINFO_NAME, r->pool); - - if (APR_STATUS_IS_ENOENT(rv)) { - /* Nothing? That could be nice. But our directory - * walk is done. - */ - thisinfo.filetype = APR_NOFILE; - break; - } - else if (APR_STATUS_IS_EACCES(rv)) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "access to %s denied", r->uri); - return r->status = HTTP_FORBIDDEN; - } - else if ((rv != APR_SUCCESS && rv != APR_INCOMPLETE) - || !(thisinfo.valid & APR_FINFO_TYPE)) { - /* If we hit ENOTDIR, we must have over-optimized, deny - * rather than assume not found. - */ - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "access to %s failed", r->uri); - return r->status = HTTP_FORBIDDEN; - } - - /* Fix up the path now if we have a name, and they don't agree - */ - if ((thisinfo.valid & APR_FINFO_NAME) - && strcmp(seg_name, thisinfo.name)) { - /* TODO: provide users an option that an internal/external - * redirect is required here? We need to walk the URI and - * filename in tandem to properly correlate these. - */ - strcpy(seg_name, thisinfo.name); - filename_len = strlen(r->filename); - } - - if (thisinfo.filetype == APR_LNK) { - /* Is this a possibly acceptable symlink? - */ - if ((res = resolve_symlink(r->filename, &thisinfo, - opts.opts, r->pool)) != OK) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, - "Symbolic link not allowed: %s", - r->filename); - return r->status = res; - } - } - - /* Ok, we are done with the link's info, test the real target - */ - if (thisinfo.filetype == APR_REG || - thisinfo.filetype == APR_NOFILE) { - /* That was fun, nothing left for us here - */ - break; - } - else if (thisinfo.filetype != APR_DIR) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, - "Forbidden: %s doesn't point to " - "a file or directory", - r->filename); - return r->status = HTTP_FORBIDDEN; - } - - ++seg; - } while (thisinfo.filetype == APR_DIR); - - /* If we have _not_ optimized, this is the time to recover - * the final stat result. - */ - if (!r->finfo.filetype || r->finfo.filetype == APR_LNK) { - r->finfo = thisinfo; - } - - /* Now splice the saved path_info back onto any new path_info - */ - if (save_path_info) { - if (r->path_info && *r->path_info) { - r->path_info = ap_make_full_path(r->pool, r->path_info, - save_path_info); - } - else { - r->path_info = save_path_info; - } - } - - /* - * Now we'll deal with the regexes, note we pick up sec_idx - * where we left off (we gave up after we hit entry_core->r) - */ - for (; sec_idx < num_sec; ++sec_idx) { - - core_dir_config *entry_core; - entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module); - - if (!entry_core->r) { - continue; - } - - if (ap_regexec(entry_core->r, r->filename, 0, NULL, REG_NOTEOL)) { - continue; - } - - /* If we haven't already continue'd above, we have a match. - * - * Calculate our full-context core opts & override. - */ - core_opts_merge(sec_ent[sec_idx], &opts); - - /* If we merged this same section last time, reuse it - */ - if (matches) { - if (last_walk->matched == sec_ent[sec_idx]) { - now_merged = last_walk->merged; - ++last_walk; - --matches; - continue; - } - - /* We fell out of sync. This is our own copy of walked, - * so truncate the remaining matches and reset remaining. - */ - cache->walked->nelts -= matches; - matches = 0; - } - - if (now_merged) { - now_merged = ap_merge_per_dir_configs(r->pool, - now_merged, - sec_ent[sec_idx]); - } - else { - now_merged = sec_ent[sec_idx]; - } - - last_walk = (walk_walked_t*)apr_array_push(cache->walked); - last_walk->matched = sec_ent[sec_idx]; - last_walk->merged = now_merged; - } - - /* Whoops - everything matched in sequence, but the original walk - * found some additional matches. Truncate them. - */ - if (matches) { - cache->walked->nelts -= matches; - } - } - -/* It seems this shouldn't be needed anymore. We translated the - x symlink above into a real resource, and should have died up there. - x Even if we keep this, it needs more thought (maybe an r->file_is_symlink) - x perhaps it should actually happen in file_walk, so we catch more - x obscure cases in autoindex subrequests, etc. - x - x * Symlink permissions are determined by the parent. If the request is - x * for a directory then applying the symlink test here would use the - x * permissions of the directory as opposed to its parent. Consider a - x * symlink pointing to a dir with a .htaccess disallowing symlinks. If - x * you access /symlink (or /symlink/) you would get a 403 without this - x * APR_DIR test. But if you accessed /symlink/index.html, for example, - x * you would *not* get the 403. - x - x if (r->finfo.filetype != APR_DIR - x && (res = resolve_symlink(r->filename, r->info, ap_allow_options(r), - x r->pool))) { - x ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, - x "Symbolic link not allowed: %s", r->filename); - x return res; - x } - */ - - /* Save future sub-requestors much angst in processing - * this subrequest. If dir_walk couldn't canonicalize - * the file path, nothing can. - */ - r->canonical_filename = r->filename; - - if (r->finfo.filetype == APR_DIR) { - cache->cached = r->filename; - } - else { - cache->cached = ap_make_dirstr_parent(r->pool, r->filename); - } - - cache->dir_conf_tested = sec_ent; - cache->dir_conf_merged = r->per_dir_config; - - /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs, - * and note the end result to (potentially) skip this step next time. - */ - if (now_merged) { - r->per_dir_config = ap_merge_per_dir_configs(r->pool, - r->per_dir_config, - now_merged); - } - cache->per_dir_result = r->per_dir_config; - - return OK; -} - - -AP_DECLARE(int) ap_location_walk(request_rec *r) -{ - ap_conf_vector_t *now_merged = NULL; - core_server_config *sconf = ap_get_module_config(r->server->module_config, - &core_module); - ap_conf_vector_t **sec_ent = (ap_conf_vector_t **)sconf->sec_url->elts; - int num_sec = sconf->sec_url->nelts; - walk_cache_t *cache; - const char *entry_uri; - - /* No tricks here, there are no <Locations > to parse in this vhost. - * We won't destroy the cache, just in case _this_ redirect is later - * redirected again to a vhost with <Location > blocks to optimize. - */ - if (!num_sec) { - return OK; - } - - cache = prep_walk_cache(AP_NOTE_LOCATION_WALK, r); - - /* Location and LocationMatch differ on their behaviour w.r.t. multiple - * slashes. Location matches multiple slashes with a single slash, - * LocationMatch doesn't. An exception, for backwards brokenness is - * absoluteURIs... in which case neither match multiple slashes. - */ - if (r->uri[0] != '/') { - entry_uri = r->uri; - } - else { - char *uri = apr_pstrdup(r->pool, r->uri); - ap_no2slash(uri); - entry_uri = uri; - } - - /* If we have an cache->cached location that matches r->uri, - * and the vhost's list of locations hasn't changed, we can skip - * rewalking the location_walk entries. - */ - if (cache->cached - && (cache->dir_conf_tested == sec_ent) - && (strcmp(entry_uri, cache->cached) == 0)) { - /* Well this looks really familiar! If our end-result (per_dir_result) - * didn't change, we have absolutely nothing to do :) - * Otherwise (as is the case with most dir_merged/file_merged requests) - * we must merge our dir_conf_merged onto this new r->per_dir_config. - */ - if (r->per_dir_config == cache->per_dir_result) { - return OK; - } - - if (r->per_dir_config == cache->dir_conf_merged) { - r->per_dir_config = cache->per_dir_result; - return OK; - } - - if (cache->walked->nelts) { - now_merged = ((walk_walked_t*)cache->walked->elts) - [cache->walked->nelts - 1].merged; - } - } - else { - /* We start now_merged from NULL since we want to build - * a locations list that can be merged to any vhost. - */ - int len, sec_idx; - int matches = cache->walked->nelts; - walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts; - cache->cached = entry_uri; - - /* Go through the location entries, and check for matches. - * We apply the directive sections in given order, we should - * really try them with the most general first. - */ - for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) { - - core_dir_config *entry_core; - entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module); - - /* ### const strlen can be optimized in location config parsing */ - len = strlen(entry_core->d); - - /* Test the regex, fnmatch or string as appropriate. - * If it's a strcmp, and the <Location > pattern was - * not slash terminated, then this uri must be slash - * terminated (or at the end of the string) to match. - */ - if (entry_core->r - ? ap_regexec(entry_core->r, r->uri, 0, NULL, 0) - : (entry_core->d_is_fnmatch - ? apr_fnmatch(entry_core->d, cache->cached, FNM_PATHNAME) - : (strncmp(entry_core->d, cache->cached, len) - || (entry_core->d[len - 1] != '/' - && cache->cached[len] != '/' - && cache->cached[len] != '\0')))) { - continue; - } - - /* If we merged this same section last time, reuse it - */ - if (matches) { - if (last_walk->matched == sec_ent[sec_idx]) { - now_merged = last_walk->merged; - ++last_walk; - --matches; - continue; - } - - /* We fell out of sync. This is our own copy of walked, - * so truncate the remaining matches and reset remaining. - */ - cache->walked->nelts -= matches; - matches = 0; - } - - if (now_merged) { - now_merged = ap_merge_per_dir_configs(r->pool, - now_merged, - sec_ent[sec_idx]); - } - else { - now_merged = sec_ent[sec_idx]; - } - - last_walk = (walk_walked_t*)apr_array_push(cache->walked); - last_walk->matched = sec_ent[sec_idx]; - last_walk->merged = now_merged; - } - - /* Whoops - everything matched in sequence, but the original walk - * found some additional matches. Truncate them. - */ - if (matches) { - cache->walked->nelts -= matches; - } - } - - cache->dir_conf_tested = sec_ent; - cache->dir_conf_merged = r->per_dir_config; - - /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs, - * and note the end result to (potentially) skip this step next time. - */ - if (now_merged) { - r->per_dir_config = ap_merge_per_dir_configs(r->pool, - r->per_dir_config, - now_merged); - } - cache->per_dir_result = r->per_dir_config; - - return OK; -} - -AP_DECLARE(int) ap_file_walk(request_rec *r) -{ - ap_conf_vector_t *now_merged = NULL; - core_dir_config *dconf = ap_get_module_config(r->per_dir_config, - &core_module); - ap_conf_vector_t **sec_ent = (ap_conf_vector_t **)dconf->sec_file->elts; - int num_sec = dconf->sec_file->nelts; - walk_cache_t *cache; - const char *test_file; - - /* To allow broken modules to proceed, we allow missing filenames to pass. - * We will catch it later if it's heading for the core handler. - * directory_walk already posted an INFO note for module debugging. - */ - if (r->filename == NULL) { - return OK; - } - - cache = prep_walk_cache(AP_NOTE_FILE_WALK, r); - - /* No tricks here, there are just no <Files > to parse in this context. - * We won't destroy the cache, just in case _this_ redirect is later - * redirected again to a context containing the same or similar <Files >. - */ - if (!num_sec) { - return OK; - } - - /* Get the basename .. and copy for the cache just - * in case r->filename is munged by another module - */ - test_file = strrchr(r->filename, '/'); - if (test_file == NULL) { - test_file = apr_pstrdup(r->pool, r->filename); - } - else { - test_file = apr_pstrdup(r->pool, ++test_file); - } - - /* If we have an cache->cached file name that matches test_file, - * and the directory's list of file sections hasn't changed, we - * can skip rewalking the file_walk entries. - */ - if (cache->cached - && (cache->dir_conf_tested == sec_ent) - && (strcmp(test_file, cache->cached) == 0)) { - /* Well this looks really familiar! If our end-result (per_dir_result) - * didn't change, we have absolutely nothing to do :) - * Otherwise (as is the case with most dir_merged requests) - * we must merge our dir_conf_merged onto this new r->per_dir_config. - */ - if (r->per_dir_config == cache->per_dir_result) { - return OK; - } - - if (r->per_dir_config == cache->dir_conf_merged) { - r->per_dir_config = cache->per_dir_result; - return OK; - } - - if (cache->walked->nelts) { - now_merged = ((walk_walked_t*)cache->walked->elts) - [cache->walked->nelts - 1].merged; - } - } - else { - /* We start now_merged from NULL since we want to build - * a file section list that can be merged to any dir_walk. - */ - int sec_idx; - int matches = cache->walked->nelts; - walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts; - cache->cached = test_file; - - /* Go through the location entries, and check for matches. - * We apply the directive sections in given order, we should - * really try them with the most general first. - */ - for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) { - - core_dir_config *entry_core; - entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module); - - if (entry_core->r - ? ap_regexec(entry_core->r, cache->cached , 0, NULL, 0) - : (entry_core->d_is_fnmatch - ? apr_fnmatch(entry_core->d, cache->cached, FNM_PATHNAME) - : strcmp(entry_core->d, cache->cached))) { - continue; - } - - /* If we merged this same section last time, reuse it - */ - if (matches) { - if (last_walk->matched == sec_ent[sec_idx]) { - now_merged = last_walk->merged; - ++last_walk; - --matches; - continue; - } - - /* We fell out of sync. This is our own copy of walked, - * so truncate the remaining matches and reset remaining. - */ - cache->walked->nelts -= matches; - matches = 0; - } - - if (now_merged) { - now_merged = ap_merge_per_dir_configs(r->pool, - now_merged, - sec_ent[sec_idx]); - } - else { - now_merged = sec_ent[sec_idx]; - } - - last_walk = (walk_walked_t*)apr_array_push(cache->walked); - last_walk->matched = sec_ent[sec_idx]; - last_walk->merged = now_merged; - } - - /* Whoops - everything matched in sequence, but the original walk - * found some additional matches. Truncate them. - */ - if (matches) { - cache->walked->nelts -= matches; - } - } - - cache->dir_conf_tested = sec_ent; - cache->dir_conf_merged = r->per_dir_config; - - /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs, - * and note the end result to (potentially) skip this step next time. - */ - if (now_merged) { - r->per_dir_config = ap_merge_per_dir_configs(r->pool, - r->per_dir_config, - now_merged); - } - cache->per_dir_result = r->per_dir_config; - - return OK; -} - -/***************************************************************** - * - * The sub_request mechanism. - * - * Fns to look up a relative URI from, e.g., a map file or SSI document. - * These do all access checks, etc., but don't actually run the transaction - * ... use run_sub_req below for that. Also, be sure to use destroy_sub_req - * as appropriate if you're likely to be creating more than a few of these. - * (An early Apache version didn't destroy the sub_reqs used in directory - * indexing. The result, when indexing a directory with 800-odd files in - * it, was massively excessive storage allocation). - * - * Note more manipulation of protocol-specific vars in the request - * structure... - */ - -static request_rec *make_sub_request(const request_rec *r, - ap_filter_t *next_filter) -{ - apr_pool_t *rrp; - request_rec *rnew; - - apr_pool_create(&rrp, r->pool); - apr_pool_tag(rrp, "subrequest"); - rnew = apr_pcalloc(rrp, sizeof(request_rec)); - rnew->pool = rrp; - - rnew->hostname = r->hostname; - rnew->request_time = r->request_time; - rnew->connection = r->connection; - rnew->server = r->server; - - rnew->request_config = ap_create_request_config(rnew->pool); - - /* Start a clean config from this subrequest's vhost. Optimization in - * Location/File/Dir walks from the parent request assure that if the - * config blocks of the subrequest match the parent request, no merges - * will actually occur (and generally a minimal number of merges are - * required, even if the parent and subrequest aren't quite identical.) - */ - rnew->per_dir_config = r->server->lookup_defaults; - - rnew->htaccess = r->htaccess; - rnew->allowed_methods = ap_make_method_list(rnew->pool, 2); - - /* make a copy of the allowed-methods list */ - ap_copy_method_list(rnew->allowed_methods, r->allowed_methods); - - /* start with the same set of output filters */ - if (next_filter) { - /* while there are no input filters for a subrequest, we will - * try to insert some, so if we don't have valid data, the code - * will seg fault. - */ - rnew->input_filters = r->input_filters; - rnew->proto_input_filters = r->proto_input_filters; - rnew->output_filters = next_filter; - rnew->proto_output_filters = r->proto_output_filters; - ap_add_output_filter_handle(ap_subreq_core_filter_handle, - NULL, rnew, rnew->connection); - } - else { - /* If NULL - we are expecting to be internal_fast_redirect'ed - * to this subrequest - or this request will never be invoked. - * Ignore the original request filter stack entirely, and - * drill the input and output stacks back to the connection. - */ - rnew->proto_input_filters = r->proto_input_filters; - rnew->proto_output_filters = r->proto_output_filters; - - rnew->input_filters = r->proto_input_filters; - rnew->output_filters = r->proto_output_filters; - } - - /* no input filters for a subrequest */ - - ap_set_sub_req_protocol(rnew, r); - - /* We have to run this after we fill in sub req vars, - * or the r->main pointer won't be setup - */ - ap_run_create_request(rnew); - - return rnew; -} - -AP_CORE_DECLARE_NONSTD(apr_status_t) ap_sub_req_output_filter(ap_filter_t *f, - apr_bucket_brigade *bb) -{ - apr_bucket *e = APR_BRIGADE_LAST(bb); - - if (APR_BUCKET_IS_EOS(e)) { - apr_bucket_delete(e); - } - - if (!APR_BRIGADE_EMPTY(bb)) { - return ap_pass_brigade(f->next, bb); - } - - return APR_SUCCESS; -} - - -AP_DECLARE(int) ap_some_auth_required(request_rec *r) -{ - /* Is there a require line configured for the type of *this* req? */ - - const apr_array_header_t *reqs_arr = ap_requires(r); - require_line *reqs; - int i; - - if (!reqs_arr) { - return 0; - } - - reqs = (require_line *) reqs_arr->elts; - - for (i = 0; i < reqs_arr->nelts; ++i) { - if (reqs[i].method_mask & (AP_METHOD_BIT << r->method_number)) { - return 1; - } - } - - return 0; -} - - -AP_DECLARE(request_rec *) ap_sub_req_method_uri(const char *method, - const char *new_uri, - const request_rec *r, - ap_filter_t *next_filter) -{ - request_rec *rnew; - int res; - char *udir; - - rnew = make_sub_request(r, next_filter); - - /* would be nicer to pass "method" to ap_set_sub_req_protocol */ - rnew->method = method; - rnew->method_number = ap_method_number_of(method); - - if (new_uri[0] == '/') { - ap_parse_uri(rnew, new_uri); - } - else { - udir = ap_make_dirstr_parent(rnew->pool, r->uri); - udir = ap_escape_uri(rnew->pool, udir); /* re-escape it */ - ap_parse_uri(rnew, ap_make_full_path(rnew->pool, udir, new_uri)); - } - - /* We cannot return NULL without violating the API. So just turn this - * subrequest into a 500 to indicate the failure. */ - if (ap_is_recursion_limit_exceeded(r)) { - rnew->status = HTTP_INTERNAL_SERVER_ERROR; - return rnew; - } - - /* lookup_uri - * If the content can be served by the quick_handler, we can - * safely bypass request_internal processing. - */ - res = ap_run_quick_handler(rnew, 1); - - if (res != OK) { - if ((res = ap_process_request_internal(rnew))) { - rnew->status = res; - } - } - - return rnew; -} - -AP_DECLARE(request_rec *) ap_sub_req_lookup_uri(const char *new_uri, - const request_rec *r, - ap_filter_t *next_filter) -{ - return ap_sub_req_method_uri("GET", new_uri, r, next_filter); -} - -AP_DECLARE(request_rec *) ap_sub_req_lookup_dirent(const apr_finfo_t *dirent, - const request_rec *r, - int subtype, - ap_filter_t *next_filter) -{ - request_rec *rnew; - int res; - char *fdir; - char *udir; - - rnew = make_sub_request(r, next_filter); - - /* Special case: we are looking at a relative lookup in the same directory. - * This is 100% safe, since dirent->name just came from the filesystem. - */ - if (r->path_info && *r->path_info) { - /* strip path_info off the end of the uri to keep it in sync - * with r->filename, which has already been stripped by directory_walk, - * merge the dirent->name, and then, if the caller wants us to remerge - * the original path info, do so. Note we never fix the path_info back - * to r->filename, since dir_walk would do so (but we don't expect it - * to happen in the usual cases) - */ - udir = apr_pstrdup(rnew->pool, r->uri); - udir[ap_find_path_info(udir, r->path_info)] = '\0'; - udir = ap_make_dirstr_parent(rnew->pool, udir); - - rnew->uri = ap_make_full_path(rnew->pool, udir, dirent->name); - if (subtype == AP_SUBREQ_MERGE_ARGS) { - rnew->uri = ap_make_full_path(rnew->pool, rnew->uri, r->path_info + 1); - rnew->path_info = apr_pstrdup(rnew->pool, r->path_info); - } - rnew->uri = ap_escape_uri(rnew->pool, rnew->uri); - } - else { - udir = ap_make_dirstr_parent(rnew->pool, r->uri); - rnew->uri = ap_escape_uri(rnew->pool, ap_make_full_path(rnew->pool, - udir, - dirent->name)); - } - - fdir = ap_make_dirstr_parent(rnew->pool, r->filename); - rnew->filename = ap_make_full_path(rnew->pool, fdir, dirent->name); - if (r->canonical_filename == r->filename) { - rnew->canonical_filename = rnew->filename; - } - - /* XXX This is now less relevant; we will do a full location walk - * these days for this case. Preserve the apr_stat results, and - * perhaps we also tag that symlinks were tested and/or found for - * r->filename. - */ - rnew->per_dir_config = r->server->lookup_defaults; - - if ((dirent->valid & APR_FINFO_MIN) != APR_FINFO_MIN) { - /* - * apr_dir_read isn't very complete on this platform, so - * we need another apr_lstat (or simply apr_stat if we allow - * all symlinks here.) If this is an APR_LNK that resolves - * to an APR_DIR, then we will rerun everything anyways... - * this should be safe. - */ - apr_status_t rv; - if (ap_allow_options(rnew) & OPT_SYM_LINKS) { - if (((rv = apr_stat(&rnew->finfo, rnew->filename, - APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS) - && (rv != APR_INCOMPLETE)) { - rnew->finfo.filetype = 0; - } - } - else { - if (((rv = apr_lstat(&rnew->finfo, rnew->filename, - APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS) - && (rv != APR_INCOMPLETE)) { - rnew->finfo.filetype = 0; - } - } - } - else { - memcpy(&rnew->finfo, dirent, sizeof(apr_finfo_t)); - } - - if (rnew->finfo.filetype == APR_LNK) { - /* - * Resolve this symlink. We should tie this back to dir_walk's cache - */ - if ((res = resolve_symlink(rnew->filename, &rnew->finfo, - ap_allow_options(rnew), rnew->pool)) - != OK) { - rnew->status = res; - return rnew; - } - } - - if (rnew->finfo.filetype == APR_DIR) { - /* ap_make_full_path overallocated the buffers - * by one character to help us out here. - */ - strcpy(rnew->filename + strlen(rnew->filename), "/"); - if (!rnew->path_info || !*rnew->path_info) { - strcpy(rnew->uri + strlen(rnew->uri ), "/"); - } - } - - /* fill in parsed_uri values - */ - if (r->args && *r->args && (subtype == AP_SUBREQ_MERGE_ARGS)) { - ap_parse_uri(rnew, apr_pstrcat(r->pool, rnew->uri, "?", - r->args, NULL)); - } - else { - ap_parse_uri(rnew, rnew->uri); - } - - /* We cannot return NULL without violating the API. So just turn this - * subrequest into a 500. */ - if (ap_is_recursion_limit_exceeded(r)) { - rnew->status = HTTP_INTERNAL_SERVER_ERROR; - return rnew; - } - - if ((res = ap_process_request_internal(rnew))) { - rnew->status = res; - } - - return rnew; -} - -AP_DECLARE(request_rec *) ap_sub_req_lookup_file(const char *new_file, - const request_rec *r, - ap_filter_t *next_filter) -{ - request_rec *rnew; - int res; - char *fdir; - apr_size_t fdirlen; - - rnew = make_sub_request(r, next_filter); - - fdir = ap_make_dirstr_parent(rnew->pool, r->filename); - fdirlen = strlen(fdir); - - /* Translate r->filename, if it was canonical, it stays canonical - */ - if (r->canonical_filename == r->filename) { - rnew->canonical_filename = (char*)(1); - } - - if (apr_filepath_merge(&rnew->filename, fdir, new_file, - APR_FILEPATH_TRUENAME, rnew->pool) != APR_SUCCESS) { - rnew->status = HTTP_FORBIDDEN; - return rnew; - } - - if (rnew->canonical_filename) { - rnew->canonical_filename = rnew->filename; - } - - /* - * Check for a special case... if there are no '/' characters in new_file - * at all, and the path was the same, then we are looking at a relative - * lookup in the same directory. Fixup the URI to match. - */ - - if (strncmp(rnew->filename, fdir, fdirlen) == 0 - && rnew->filename[fdirlen] - && ap_strchr_c(rnew->filename + fdirlen, '/') == NULL) { - apr_status_t rv; - if (ap_allow_options(rnew) & OPT_SYM_LINKS) { - if (((rv = apr_stat(&rnew->finfo, rnew->filename, - APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS) - && (rv != APR_INCOMPLETE)) { - rnew->finfo.filetype = 0; - } - } - else { - if (((rv = apr_lstat(&rnew->finfo, rnew->filename, - APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS) - && (rv != APR_INCOMPLETE)) { - rnew->finfo.filetype = 0; - } - } - - if (r->uri && *r->uri) { - char *udir = ap_make_dirstr_parent(rnew->pool, r->uri); - rnew->uri = ap_make_full_path(rnew->pool, udir, - rnew->filename + fdirlen); - ap_parse_uri(rnew, rnew->uri); /* fill in parsed_uri values */ - } - else { - ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */ - rnew->uri = apr_pstrdup(rnew->pool, ""); - } - } - else { - /* XXX: @@@: What should be done with the parsed_uri values? - * We would be better off stripping down to the 'common' elements - * of the path, then reassembling the URI as best as we can. - */ - ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */ - /* - * XXX: this should be set properly like it is in the same-dir case - * but it's actually sometimes to impossible to do it... because the - * file may not have a uri associated with it -djg - */ - rnew->uri = apr_pstrdup(rnew->pool, ""); - } - - /* We cannot return NULL without violating the API. So just turn this - * subrequest into a 500. */ - if (ap_is_recursion_limit_exceeded(r)) { - rnew->status = HTTP_INTERNAL_SERVER_ERROR; - return rnew; - } - - if ((res = ap_process_request_internal(rnew))) { - rnew->status = res; - } - - return rnew; -} - -AP_DECLARE(int) ap_run_sub_req(request_rec *r) -{ - int retval = DECLINED; - /* Run the quick handler if the subrequest is not a dirent or file - * subrequest - */ - if (!(r->filename && r->finfo.filetype)) { - retval = ap_run_quick_handler(r, 0); - } - if (retval != OK) { - retval = ap_invoke_handler(r); - if (retval == DONE) { - retval = OK; - } - } - ap_finalize_sub_req_protocol(r); - return retval; -} - -AP_DECLARE(void) ap_destroy_sub_req(request_rec *r) -{ - /* Reclaim the space */ - apr_pool_destroy(r->pool); -} - -/* - * Function to set the r->mtime field to the specified value if it's later - * than what's already there. - */ -AP_DECLARE(void) ap_update_mtime(request_rec *r, apr_time_t dependency_mtime) -{ - if (r->mtime < dependency_mtime) { - r->mtime = dependency_mtime; - } -} - -/* - * Is it the initial main request, which we only get *once* per HTTP request? - */ -AP_DECLARE(int) ap_is_initial_req(request_rec *r) -{ - return (r->main == NULL) /* otherwise, this is a sub-request */ - && (r->prev == NULL); /* otherwise, this is an internal redirect */ -} |