1 /* Copyright 2001-2005 The Apache Software Foundation or its licensors, as
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 * http_request.c: functions to get and process requests
22 * Thoroughly revamped by rst for Apache. NB this file reads
23 * best from the bottom up.
27 #include "apr_strings.h"
28 #include "apr_file_io.h"
29 #include "apr_fnmatch.h"
31 #define APR_WANT_STRFUNC
35 #include "ap_config.h"
37 #include "http_config.h"
38 #include "http_request.h"
39 #include "http_core.h"
40 #include "http_protocol.h"
42 #include "http_main.h"
43 #include "util_filter.h"
44 #include "util_charset.h"
45 #include "util_script.h"
54 APR_HOOK_LINK(translate_name)
55 APR_HOOK_LINK(map_to_storage)
56 APR_HOOK_LINK(check_user_id)
58 APR_HOOK_LINK(type_checker)
59 APR_HOOK_LINK(access_checker)
60 APR_HOOK_LINK(auth_checker)
61 APR_HOOK_LINK(insert_filter)
62 APR_HOOK_LINK(create_request)
65 AP_IMPLEMENT_HOOK_RUN_FIRST(int,translate_name,
66 (request_rec *r), (r), DECLINED)
67 AP_IMPLEMENT_HOOK_RUN_FIRST(int,map_to_storage,
68 (request_rec *r), (r), DECLINED)
69 AP_IMPLEMENT_HOOK_RUN_FIRST(int,check_user_id,
70 (request_rec *r), (r), DECLINED)
71 AP_IMPLEMENT_HOOK_RUN_ALL(int,fixups,
72 (request_rec *r), (r), OK, DECLINED)
73 AP_IMPLEMENT_HOOK_RUN_FIRST(int,type_checker,
74 (request_rec *r), (r), DECLINED)
75 AP_IMPLEMENT_HOOK_RUN_ALL(int,access_checker,
76 (request_rec *r), (r), OK, DECLINED)
77 AP_IMPLEMENT_HOOK_RUN_FIRST(int,auth_checker,
78 (request_rec *r), (r), DECLINED)
79 AP_IMPLEMENT_HOOK_VOID(insert_filter, (request_rec *r), (r))
80 AP_IMPLEMENT_HOOK_RUN_ALL(int, create_request,
81 (request_rec *r), (r), OK, DECLINED)
84 static int decl_die(int status, char *phase, request_rec *r)
86 if (status == DECLINED) {
87 ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r,
88 "configuration error: couldn't %s: %s", phase, r->uri);
89 return HTTP_INTERNAL_SERVER_ERROR;
96 /* This is the master logic for processing requests. Do NOT duplicate
97 * this logic elsewhere, or the security model will be broken by future
98 * API changes. Each phase must be individually optimized to pick up
99 * redundant/duplicate calls by subrequests, and redirects.
101 AP_DECLARE(int) ap_process_request_internal(request_rec *r)
103 int file_req = (r->main && r->filename);
106 /* Ignore embedded %2F's in path for proxy requests */
107 if (!r->proxyreq && r->parsed_uri.path) {
109 d = ap_get_module_config(r->per_dir_config, &core_module);
110 if (d->allow_encoded_slashes) {
111 access_status = ap_unescape_url_keep2f(r->parsed_uri.path);
114 access_status = ap_unescape_url(r->parsed_uri.path);
117 if (access_status == HTTP_NOT_FOUND) {
118 if (! d->allow_encoded_slashes) {
119 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
120 "found %%2f (encoded '/') in URI "
121 "(decoded='%s'), returning 404",
125 return access_status;
129 ap_getparents(r->uri); /* OK --- shrinking transformations... */
131 /* All file subrequests are a huge pain... they cannot bubble through the
132 * next several steps. Only file subrequests are allowed an empty uri,
133 * otherwise let translate_name kill the request.
136 if ((access_status = ap_location_walk(r))) {
137 return access_status;
140 if ((access_status = ap_run_translate_name(r))) {
141 return decl_die(access_status, "translate", r);
145 /* Reset to the server default config prior to running map_to_storage
147 r->per_dir_config = r->server->lookup_defaults;
149 if ((access_status = ap_run_map_to_storage(r))) {
150 /* This request wasn't in storage (e.g. TRACE) */
151 return access_status;
154 /* Excluding file-specific requests with no 'true' URI...
157 /* Rerun the location walk, which overrides any map_to_storage config.
159 if ((access_status = ap_location_walk(r))) {
160 return access_status;
164 /* Only on the main request! */
165 if (r->main == NULL) {
166 if ((access_status = ap_run_header_parser(r))) {
167 return access_status;
171 /* Skip authn/authz if the parent or prior request passed the authn/authz,
172 * and that configuration didn't change (this requires optimized _walk()
173 * functions in map_to_storage that use the same merge results given
174 * identical input.) If the config changes, we must re-auth.
176 if (r->main && (r->main->per_dir_config == r->per_dir_config)) {
177 r->user = r->main->user;
178 r->ap_auth_type = r->main->ap_auth_type;
180 else if (r->prev && (r->prev->per_dir_config == r->per_dir_config)) {
181 r->user = r->prev->user;
182 r->ap_auth_type = r->prev->ap_auth_type;
185 switch (ap_satisfies(r)) {
188 if ((access_status = ap_run_access_checker(r)) != 0) {
189 return decl_die(access_status, "check access", r);
192 if (ap_some_auth_required(r)) {
193 if (((access_status = ap_run_check_user_id(r)) != 0)
194 || !ap_auth_type(r)) {
195 return decl_die(access_status, ap_auth_type(r)
196 ? "check user. No user file?"
197 : "perform authentication. AuthType not set!",
201 if (((access_status = ap_run_auth_checker(r)) != 0)
202 || !ap_auth_type(r)) {
203 return decl_die(access_status, ap_auth_type(r)
204 ? "check access. No groups file?"
205 : "perform authentication. AuthType not set!",
212 if (((access_status = ap_run_access_checker(r)) != 0)) {
213 if (!ap_some_auth_required(r)) {
214 return decl_die(access_status, "check access", r);
217 if (((access_status = ap_run_check_user_id(r)) != 0)
218 || !ap_auth_type(r)) {
219 return decl_die(access_status, ap_auth_type(r)
220 ? "check user. No user file?"
221 : "perform authentication. AuthType not set!",
225 if (((access_status = ap_run_auth_checker(r)) != 0)
226 || !ap_auth_type(r)) {
227 return decl_die(access_status, ap_auth_type(r)
228 ? "check access. No groups file?"
229 : "perform authentication. AuthType not set!",
236 /* XXX Must make certain the ap_run_type_checker short circuits mime
237 * in mod-proxy for r->proxyreq && r->parsed_uri.scheme
238 * && !strcmp(r->parsed_uri.scheme, "http")
240 if ((access_status = ap_run_type_checker(r)) != 0) {
241 return decl_die(access_status, "find types", r);
244 if ((access_status = ap_run_fixups(r)) != 0) {
245 return access_status;
252 /* Useful caching structures to repeat _walk/merge sequences as required
253 * when a subrequest or redirect reuses substantially the same config.
255 * Directive order in the httpd.conf file and its Includes significantly
256 * impact this optimization. Grouping common blocks at the front of the
257 * config that are less likely to change between a request and
258 * its subrequests, or between a request and its redirects reduced
259 * the work of these functions significantly.
262 typedef struct walk_walked_t {
263 ap_conf_vector_t *matched; /* A dir_conf sections we matched */
264 ap_conf_vector_t *merged; /* The dir_conf merged result */
267 typedef struct walk_cache_t {
268 const char *cached; /* The identifier we matched */
269 ap_conf_vector_t **dir_conf_tested; /* The sections we matched against */
270 ap_conf_vector_t *dir_conf_merged; /* Base per_dir_config */
271 ap_conf_vector_t *per_dir_result; /* per_dir_config += walked result */
272 apr_array_header_t *walked; /* The list of walk_walked_t results */
275 static walk_cache_t *prep_walk_cache(apr_size_t t, request_rec *r)
280 /* Find the most relevant, recent entry to work from. That would be
281 * this request (on the second call), or the parent request of a
282 * subrequest, or the prior request of an internal redirect. Provide
283 * this _walk()er with a copy it is allowed to munge. If there is no
284 * parent or prior cached request, then create a new walk cache.
286 note = ap_get_request_note(r, t);
291 if (!(cache = *note)) {
295 && ((inherit_note = ap_get_request_note(r->main, t)))
298 && ((inherit_note = ap_get_request_note(r->prev, t)))
300 cache = apr_pmemdup(r->pool, *inherit_note,
302 cache->walked = apr_array_copy(r->pool, cache->walked);
305 cache = apr_pcalloc(r->pool, sizeof(*cache));
306 cache->walked = apr_array_make(r->pool, 4, sizeof(walk_walked_t));
314 /*****************************************************************
316 * Getting and checking directory configuration. Also checks the
317 * FollowSymlinks and FollowSymOwner stuff, since this is really the
318 * only place that can happen (barring a new mid_dir_walk callout).
320 * We can't do it as an access_checker module function which gets
321 * called with the final per_dir_config, since we could have a directory
322 * with FollowSymLinks disabled, which contains a symlink to another
323 * with a .htaccess file which turns FollowSymLinks back on --- and
324 * access in such a case must be denied. So, whatever it is that
325 * checks FollowSymLinks needs to know the state of the options as
326 * they change, all the way down.
331 * resolve_symlink must _always_ be called on an APR_LNK file type!
332 * It will resolve the actual target file type, modification date, etc,
333 * and provide any processing required for symlink evaluation.
334 * Path must already be cleaned, no trailing slash, no multi-slashes,
335 * and don't call this on the root!
337 * Simply, the number of times we deref a symlink are minimal compared
338 * to the number of times we had an extra lstat() since we 'weren't sure'.
340 * To optimize, we stat() anything when given (opts & OPT_SYM_LINKS), otherwise
341 * we start off with an lstat(). Every lstat() must be dereferenced in case
342 * it points at a 'nasty' - we must always rerun check_safe_file (or similar.)
344 static int resolve_symlink(char *d, apr_finfo_t *lfi, int opts, apr_pool_t *p)
348 const char *savename;
350 if (!(opts & (OPT_SYM_OWNER | OPT_SYM_LINKS))) {
351 return HTTP_FORBIDDEN;
354 /* Save the name from the valid bits. */
355 savename = (lfi->valid & APR_FINFO_NAME) ? lfi->name : NULL;
357 if (opts & OPT_SYM_LINKS) {
358 if ((res = apr_stat(&fi, d, lfi->valid & ~(APR_FINFO_NAME
359 | APR_FINFO_LINK), p))
361 return HTTP_FORBIDDEN;
364 /* Give back the target */
365 memcpy(lfi, &fi, sizeof(fi));
367 lfi->name = savename;
368 lfi->valid |= APR_FINFO_NAME;
374 /* OPT_SYM_OWNER only works if we can get the owner of
375 * both the file and symlink. First fill in a missing
376 * owner of the symlink, then get the info of the target.
378 if (!(lfi->valid & APR_FINFO_OWNER)) {
379 if ((res = apr_stat(&fi, d,
380 lfi->valid | APR_FINFO_LINK | APR_FINFO_OWNER, p))
382 return HTTP_FORBIDDEN;
386 if ((res = apr_stat(&fi, d, lfi->valid & ~(APR_FINFO_NAME), p))
388 return HTTP_FORBIDDEN;
391 if (apr_uid_compare(fi.user, lfi->user) != APR_SUCCESS) {
392 return HTTP_FORBIDDEN;
395 /* Give back the target */
396 memcpy(lfi, &fi, sizeof(fi));
398 lfi->name = savename;
399 lfi->valid |= APR_FINFO_NAME;
407 * As we walk the directory configuration, the merged config won't
408 * be 'rooted' to a specific vhost until the very end of the merge.
410 * We need a very fast mini-merge to a real, vhost-rooted merge
411 * of core.opts and core.override, the only options tested within
412 * directory_walk itself.
414 * See core.c::merge_core_dir_configs() for explanation.
417 typedef struct core_opts_t {
418 allow_options_t opts;
420 allow_options_t remove;
421 overrides_t override;
422 overrides_t override_opts;
425 static void core_opts_merge(const ap_conf_vector_t *sec, core_opts_t *opts)
427 core_dir_config *this_dir = ap_get_module_config(sec, &core_module);
433 if (this_dir->opts & OPT_UNSET) {
434 opts->add = (opts->add & ~this_dir->opts_remove)
435 | this_dir->opts_add;
436 opts->remove = (opts->remove & ~this_dir->opts_add)
437 | this_dir->opts_remove;
438 opts->opts = (opts->opts & ~opts->remove) | opts->add;
441 opts->opts = this_dir->opts;
442 opts->add = this_dir->opts_add;
443 opts->remove = this_dir->opts_remove;
446 if (!(this_dir->override & OR_UNSET)) {
447 opts->override = this_dir->override;
449 if (!(this_dir->override_opts & OR_UNSET)) {
450 opts->override_opts = this_dir->override_opts;
455 /*****************************************************************
457 * Getting and checking directory configuration. Also checks the
458 * FollowSymlinks and FollowSymOwner stuff, since this is really the
459 * only place that can happen (barring a new mid_dir_walk callout).
461 * We can't do it as an access_checker module function which gets
462 * called with the final per_dir_config, since we could have a directory
463 * with FollowSymLinks disabled, which contains a symlink to another
464 * with a .htaccess file which turns FollowSymLinks back on --- and
465 * access in such a case must be denied. So, whatever it is that
466 * checks FollowSymLinks needs to know the state of the options as
467 * they change, all the way down.
470 AP_DECLARE(int) ap_directory_walk(request_rec *r)
472 ap_conf_vector_t *now_merged = NULL;
473 core_server_config *sconf = ap_get_module_config(r->server->module_config,
475 ap_conf_vector_t **sec_ent = (ap_conf_vector_t **) sconf->sec_dir->elts;
476 int num_sec = sconf->sec_dir->nelts;
481 /* XXX: Better (faster) tests needed!!!
483 * "OK" as a response to a real problem is not _OK_, but to allow broken
484 * modules to proceed, we will permit the not-a-path filename to pass the
485 * following two tests. This behavior may be revoked in future versions
486 * of Apache. We still must catch it later if it's heading for the core
487 * handler. Leave INFO notes here for module debugging.
489 if (r->filename == NULL) {
490 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
491 "Module bug? Request filename is missing for URI %s",
496 /* Canonicalize the file path without resolving filename case or aliases
497 * so we can begin by checking the cache for a recent directory walk.
498 * This call will ensure we have an absolute path in the same pass.
500 if ((rv = apr_filepath_merge(&entry_dir, NULL, r->filename,
501 APR_FILEPATH_NOTRELATIVE, r->pool))
503 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
504 "Module bug? Request filename path %s is invalid or "
505 "or not absolute for uri %s",
506 r->filename, r->uri);
510 /* XXX Notice that this forces path_info to be canonical. That might
511 * not be desired by all apps. However, some of those same apps likely
512 * have significant security holes.
514 r->filename = entry_dir;
516 cache = prep_walk_cache(AP_NOTE_DIRECTORY_WALK, r);
518 /* If this is not a dirent subrequest with a preconstructed
519 * r->finfo value, then we can simply stat the filename to
520 * save burning mega-cycles with unneeded stats - if this is
521 * an exact file match. We don't care about failure... we
522 * will stat by component failing this meager attempt.
524 * It would be nice to distinguish APR_ENOENT from other
525 * types of failure, such as APR_ENOTDIR. We can do something
526 * with APR_ENOENT, knowing that the path is good.
528 if (!r->finfo.filetype || r->finfo.filetype == APR_LNK) {
529 rv = apr_stat(&r->finfo, r->filename, APR_FINFO_MIN, r->pool);
531 /* some OSs will return APR_SUCCESS/APR_REG if we stat
532 * a regular file but we have '/' at the end of the name;
534 * other OSs will return APR_ENOTDIR for that situation;
536 * handle it the same everywhere by simulating a failure
537 * if it looks like a directory but really isn't
539 * Also reset if the stat failed, just for safety.
541 if ((rv != APR_SUCCESS) ||
542 (r->finfo.filetype &&
543 (r->finfo.filetype != APR_DIR) &&
544 (r->filename[strlen(r->filename) - 1] == '/'))) {
545 r->finfo.filetype = 0; /* forget what we learned */
549 if (r->finfo.filetype == APR_REG) {
550 entry_dir = ap_make_dirstr_parent(r->pool, entry_dir);
552 else if (r->filename[strlen(r->filename) - 1] != '/') {
553 entry_dir = apr_pstrcat(r->pool, r->filename, "/", NULL);
556 /* If we have a file already matches the path of r->filename,
557 * and the vhost's list of directory sections hasn't changed,
558 * we can skip rewalking the directory_walk entries.
561 && ((r->finfo.filetype == APR_REG)
562 || ((r->finfo.filetype == APR_DIR)
563 && (!r->path_info || !*r->path_info)))
564 && (cache->dir_conf_tested == sec_ent)
565 && (strcmp(entry_dir, cache->cached) == 0)) {
566 /* Well this looks really familiar! If our end-result (per_dir_result)
567 * didn't change, we have absolutely nothing to do :)
568 * Otherwise (as is the case with most dir_merged/file_merged requests)
569 * we must merge our dir_conf_merged onto this new r->per_dir_config.
571 if (r->per_dir_config == cache->per_dir_result) {
575 if (r->per_dir_config == cache->dir_conf_merged) {
576 r->per_dir_config = cache->per_dir_result;
580 if (cache->walked->nelts) {
581 now_merged = ((walk_walked_t*)cache->walked->elts)
582 [cache->walked->nelts - 1].merged;
586 /* We start now_merged from NULL since we want to build
587 * a locations list that can be merged to any vhost.
590 int matches = cache->walked->nelts;
591 walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
592 core_dir_config *this_dir;
594 apr_finfo_t thisinfo;
595 char *save_path_info;
598 unsigned int seg, startseg;
600 /* Invariant: from the first time filename_len is set until
601 * it goes out of scope, filename_len==strlen(r->filename)
603 apr_size_t filename_len;
604 #ifdef CASE_BLIND_FILESYSTEM
605 apr_size_t canonical_len;
609 * We must play our own mini-merge game here, for the few
610 * running dir_config values we care about within dir_walk.
611 * We didn't start the merge from r->per_dir_config, so we
612 * accumulate opts and override as we merge, from the globals.
614 this_dir = ap_get_module_config(r->per_dir_config, &core_module);
615 opts.opts = this_dir->opts;
616 opts.add = this_dir->opts_add;
617 opts.remove = this_dir->opts_remove;
618 opts.override = this_dir->override;
620 /* Set aside path_info to merge back onto path_info later.
621 * If r->filename is a directory, we must remerge the path_info,
622 * before we continue! [Directories cannot, by defintion, have
623 * path info. Either the next segment is not-found, or a file.]
625 * r->path_info tracks the unconsumed source path.
626 * r->filename tracks the path as we process it
628 if ((r->finfo.filetype == APR_DIR) && r->path_info && *r->path_info)
630 if ((rv = apr_filepath_merge(&r->path_info, r->filename,
632 APR_FILEPATH_NOTABOVEROOT, r->pool))
634 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
635 "dir_walk error, path_info %s is not relative "
636 "to the filename path %s for uri %s",
637 r->path_info, r->filename, r->uri);
638 return HTTP_INTERNAL_SERVER_ERROR;
641 save_path_info = NULL;
644 save_path_info = r->path_info;
645 r->path_info = r->filename;
648 #ifdef CASE_BLIND_FILESYSTEM
651 while (r->canonical_filename && r->canonical_filename[canonical_len]
652 && (r->canonical_filename[canonical_len]
653 == r->path_info[canonical_len])) {
658 && ((r->canonical_filename[canonical_len - 1] != '/'
659 && r->canonical_filename[canonical_len - 1])
660 || (r->path_info[canonical_len - 1] != '/'
661 && r->path_info[canonical_len - 1]))) {
666 * Now build r->filename component by component, starting
667 * with the root (on Unix, simply "/"). We will make a huge
668 * assumption here for efficiency, that any canonical path
669 * already given included a canonical root.
671 rv = apr_filepath_root((const char **)&r->filename,
672 (const char **)&r->path_info,
673 canonical_len ? 0 : APR_FILEPATH_TRUENAME,
675 filename_len = strlen(r->filename);
678 * Bad assumption above? If the root's length is longer
679 * than the canonical length, then it cannot be trusted as
680 * a truename. So try again, this time more seriously.
682 if ((rv == APR_SUCCESS) && canonical_len
683 && (filename_len > canonical_len)) {
684 rv = apr_filepath_root((const char **)&r->filename,
685 (const char **)&r->path_info,
686 APR_FILEPATH_TRUENAME, r->pool);
687 filename_len = strlen(r->filename);
691 #else /* ndef CASE_BLIND_FILESYSTEM, really this simple for Unix today; */
693 rv = apr_filepath_root((const char **)&r->filename,
694 (const char **)&r->path_info,
696 filename_len = strlen(r->filename);
700 if (rv != APR_SUCCESS) {
701 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
702 "dir_walk error, could not determine the root "
703 "path of filename %s%s for uri %s",
704 r->filename, r->path_info, r->uri);
705 return HTTP_INTERNAL_SERVER_ERROR;
708 /* Working space for terminating null and an extra / is required.
710 buflen = filename_len + strlen(r->path_info) + 2;
711 buf = apr_palloc(r->pool, buflen);
712 memcpy(buf, r->filename, filename_len + 1);
714 thisinfo.valid = APR_FINFO_TYPE;
715 thisinfo.filetype = APR_DIR; /* It's the root, of course it's a dir */
718 * seg keeps track of which segment we've copied.
719 * sec_idx keeps track of which section we're on, since sections are
720 * ordered by number of segments. See core_reorder_directories
721 * startseg tells us how many segments describe the root path
722 * e.g. the complete path "//host/foo/" to a UNC share (4)
724 startseg = seg = ap_count_dirs(r->filename);
728 * Go down the directory hierarchy. Where we have to check for
729 * symlinks, do so. Where a .htaccess file has permission to
730 * override anything, try to find one.
738 /* We have no trailing slash, but we sure would appreciate one.
739 * However, we don't want to append a / our first time through.
741 if ((seg > startseg) && r->filename[filename_len-1] != '/') {
742 r->filename[filename_len++] = '/';
743 r->filename[filename_len] = 0;
747 /* Begin *this* level by looking for matching <Directory> sections
748 * from the server config.
750 for (; sec_idx < num_sec; ++sec_idx) {
752 ap_conf_vector_t *entry_config = sec_ent[sec_idx];
753 core_dir_config *entry_core;
754 entry_core = ap_get_module_config(entry_config, &core_module);
756 /* No more possible matches for this many segments?
757 * We are done when we find relative/regex/longer components.
759 if (entry_core->r || entry_core->d_components > seg) {
763 /* We will never skip '0' element components, e.g. plain old
764 * <Directory >, and <Directory "/"> are classified as zero
765 * so that Win32/Netware/OS2 etc all pick them up.
766 * Otherwise, skip over the mismatches.
768 if (entry_core->d_components
769 && ((entry_core->d_components < seg)
770 || (entry_core->d_is_fnmatch
771 ? (apr_fnmatch(entry_core->d, r->filename,
772 APR_FNM_PATHNAME) != APR_SUCCESS)
773 : (strcmp(r->filename, entry_core->d) != 0)))) {
777 /* If we haven't continue'd above, we have a match.
779 * Calculate our full-context core opts & override.
781 core_opts_merge(sec_ent[sec_idx], &opts);
783 /* If we merged this same section last time, reuse it
786 if (last_walk->matched == sec_ent[sec_idx]) {
787 now_merged = last_walk->merged;
793 /* We fell out of sync. This is our own copy of walked,
794 * so truncate the remaining matches and reset remaining.
796 cache->walked->nelts -= matches;
801 now_merged = ap_merge_per_dir_configs(r->pool,
806 now_merged = sec_ent[sec_idx];
809 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
810 last_walk->matched = sec_ent[sec_idx];
811 last_walk->merged = now_merged;
814 /* If .htaccess files are enabled, check for one, provided we
815 * have reached a real path.
817 do { /* Not really a loop, just a break'able code block */
819 ap_conf_vector_t *htaccess_conf = NULL;
821 /* No htaccess in an incomplete root path,
822 * nor if it's disabled
824 if (seg < startseg || !opts.override) {
828 res = ap_parse_htaccess(&htaccess_conf, r, opts.override,
830 apr_pstrdup(r->pool, r->filename),
836 if (!htaccess_conf) {
840 /* If we are still here, we found our htaccess.
842 * Calculate our full-context core opts & override.
844 core_opts_merge(htaccess_conf, &opts);
846 /* If we merged this same htaccess last time, reuse it...
847 * this wouldn't work except that we cache the htaccess
848 * sections for the lifetime of the request, so we match
849 * the same conf. Good planning (no, pure luck ;)
852 if (last_walk->matched == htaccess_conf) {
853 now_merged = last_walk->merged;
859 /* We fell out of sync. This is our own copy of walked,
860 * so truncate the remaining matches and reset
863 cache->walked->nelts -= matches;
868 now_merged = ap_merge_per_dir_configs(r->pool,
873 now_merged = htaccess_conf;
876 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
877 last_walk->matched = htaccess_conf;
878 last_walk->merged = now_merged;
880 } while (0); /* Only one htaccess, not a real loop */
882 /* That temporary trailing slash was useful, now drop it.
885 r->filename[--filename_len] = '\0';
888 /* Time for all good things to come to an end?
890 if (!r->path_info || !*r->path_info) {
894 /* Now it's time for the next segment...
895 * We will assume the next element is an end node, and fix it up
896 * below as necessary...
899 seg_name = r->filename + filename_len;
900 delim = strchr(r->path_info + (*r->path_info == '/' ? 1 : 0), '/');
902 size_t path_info_len = delim - r->path_info;
904 memcpy(seg_name, r->path_info, path_info_len + 1);
905 filename_len += path_info_len;
906 r->path_info = delim;
910 size_t path_info_len = strlen(r->path_info);
911 memcpy(seg_name, r->path_info, path_info_len + 1);
912 filename_len += path_info_len;
913 r->path_info += path_info_len;
915 if (*seg_name == '/')
918 /* If nothing remained but a '/' string, we are finished
919 * XXX: NO WE ARE NOT!!! Now process this puppy!!! */
924 /* First optimization;
925 * If...we knew r->filename was a file, and
926 * if...we have strict (case-sensitive) filenames, or
927 * we know the canonical_filename matches to _this_ name, and
928 * if...we have allowed symlinks
929 * skip the lstat and dummy up an APR_DIR value for thisinfo.
931 if (r->finfo.filetype
932 #ifdef CASE_BLIND_FILESYSTEM
933 && (filename_len <= canonical_len)
935 && ((opts.opts & (OPT_SYM_OWNER | OPT_SYM_LINKS)) == OPT_SYM_LINKS))
938 thisinfo.filetype = APR_DIR;
943 /* We choose apr_stat with flag APR_FINFO_LINK here, rather that
944 * plain apr_stat, so that we capture this path object rather than
945 * its target. We will replace the info with our target's info
946 * below. We especially want the name of this 'link' object, not
947 * the name of its target, if we are fixing the filename
948 * case/resolving aliases.
950 rv = apr_stat(&thisinfo, r->filename,
951 APR_FINFO_MIN | APR_FINFO_NAME | APR_FINFO_LINK,
954 if (APR_STATUS_IS_ENOENT(rv)) {
955 /* Nothing? That could be nice. But our directory
958 thisinfo.filetype = APR_NOFILE;
961 else if (APR_STATUS_IS_EACCES(rv)) {
962 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
963 "access to %s denied", r->uri);
964 return r->status = HTTP_FORBIDDEN;
966 else if ((rv != APR_SUCCESS && rv != APR_INCOMPLETE)
967 || !(thisinfo.valid & APR_FINFO_TYPE)) {
968 /* If we hit ENOTDIR, we must have over-optimized, deny
969 * rather than assume not found.
971 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
972 "access to %s failed", r->uri);
973 return r->status = HTTP_FORBIDDEN;
976 /* Fix up the path now if we have a name, and they don't agree
978 if ((thisinfo.valid & APR_FINFO_NAME)
979 && strcmp(seg_name, thisinfo.name)) {
980 /* TODO: provide users an option that an internal/external
981 * redirect is required here? We need to walk the URI and
982 * filename in tandem to properly correlate these.
984 strcpy(seg_name, thisinfo.name);
985 filename_len = strlen(r->filename);
988 if (thisinfo.filetype == APR_LNK) {
989 /* Is this a possibly acceptable symlink?
991 if ((res = resolve_symlink(r->filename, &thisinfo,
992 opts.opts, r->pool)) != OK) {
993 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
994 "Symbolic link not allowed: %s",
996 return r->status = res;
1000 /* Ok, we are done with the link's info, test the real target
1002 if (thisinfo.filetype == APR_REG ||
1003 thisinfo.filetype == APR_NOFILE) {
1004 /* That was fun, nothing left for us here
1008 else if (thisinfo.filetype != APR_DIR) {
1009 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
1010 "Forbidden: %s doesn't point to "
1011 "a file or directory",
1013 return r->status = HTTP_FORBIDDEN;
1017 } while (thisinfo.filetype == APR_DIR);
1019 /* If we have _not_ optimized, this is the time to recover
1020 * the final stat result.
1022 if (!r->finfo.filetype || r->finfo.filetype == APR_LNK) {
1023 r->finfo = thisinfo;
1026 /* Now splice the saved path_info back onto any new path_info
1028 if (save_path_info) {
1029 if (r->path_info && *r->path_info) {
1030 r->path_info = ap_make_full_path(r->pool, r->path_info,
1034 r->path_info = save_path_info;
1039 * Now we'll deal with the regexes, note we pick up sec_idx
1040 * where we left off (we gave up after we hit entry_core->r)
1042 for (; sec_idx < num_sec; ++sec_idx) {
1044 core_dir_config *entry_core;
1045 entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
1047 if (!entry_core->r) {
1051 if (ap_regexec(entry_core->r, r->filename, 0, NULL, AP_REG_NOTEOL)) {
1055 /* If we haven't already continue'd above, we have a match.
1057 * Calculate our full-context core opts & override.
1059 core_opts_merge(sec_ent[sec_idx], &opts);
1061 /* If we merged this same section last time, reuse it
1064 if (last_walk->matched == sec_ent[sec_idx]) {
1065 now_merged = last_walk->merged;
1071 /* We fell out of sync. This is our own copy of walked,
1072 * so truncate the remaining matches and reset remaining.
1074 cache->walked->nelts -= matches;
1079 now_merged = ap_merge_per_dir_configs(r->pool,
1084 now_merged = sec_ent[sec_idx];
1087 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
1088 last_walk->matched = sec_ent[sec_idx];
1089 last_walk->merged = now_merged;
1092 /* Whoops - everything matched in sequence, but the original walk
1093 * found some additional matches. Truncate them.
1096 cache->walked->nelts -= matches;
1100 /* It seems this shouldn't be needed anymore. We translated the
1101 x symlink above into a real resource, and should have died up there.
1102 x Even if we keep this, it needs more thought (maybe an r->file_is_symlink)
1103 x perhaps it should actually happen in file_walk, so we catch more
1104 x obscure cases in autoindex subrequests, etc.
1106 x * Symlink permissions are determined by the parent. If the request is
1107 x * for a directory then applying the symlink test here would use the
1108 x * permissions of the directory as opposed to its parent. Consider a
1109 x * symlink pointing to a dir with a .htaccess disallowing symlinks. If
1110 x * you access /symlink (or /symlink/) you would get a 403 without this
1111 x * APR_DIR test. But if you accessed /symlink/index.html, for example,
1112 x * you would *not* get the 403.
1114 x if (r->finfo.filetype != APR_DIR
1115 x && (res = resolve_symlink(r->filename, r->info, ap_allow_options(r),
1117 x ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
1118 x "Symbolic link not allowed: %s", r->filename);
1123 /* Save future sub-requestors much angst in processing
1124 * this subrequest. If dir_walk couldn't canonicalize
1125 * the file path, nothing can.
1127 r->canonical_filename = r->filename;
1129 if (r->finfo.filetype == APR_DIR) {
1130 cache->cached = r->filename;
1133 cache->cached = ap_make_dirstr_parent(r->pool, r->filename);
1136 cache->dir_conf_tested = sec_ent;
1137 cache->dir_conf_merged = r->per_dir_config;
1139 /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
1140 * and note the end result to (potentially) skip this step next time.
1143 r->per_dir_config = ap_merge_per_dir_configs(r->pool,
1147 cache->per_dir_result = r->per_dir_config;
1153 AP_DECLARE(int) ap_location_walk(request_rec *r)
1155 ap_conf_vector_t *now_merged = NULL;
1156 core_server_config *sconf = ap_get_module_config(r->server->module_config,
1158 ap_conf_vector_t **sec_ent = (ap_conf_vector_t **)sconf->sec_url->elts;
1159 int num_sec = sconf->sec_url->nelts;
1160 walk_cache_t *cache;
1161 const char *entry_uri;
1163 /* No tricks here, there are no <Locations > to parse in this vhost.
1164 * We won't destroy the cache, just in case _this_ redirect is later
1165 * redirected again to a vhost with <Location > blocks to optimize.
1171 cache = prep_walk_cache(AP_NOTE_LOCATION_WALK, r);
1173 /* Location and LocationMatch differ on their behaviour w.r.t. multiple
1174 * slashes. Location matches multiple slashes with a single slash,
1175 * LocationMatch doesn't. An exception, for backwards brokenness is
1176 * absoluteURIs... in which case neither match multiple slashes.
1178 if (r->uri[0] != '/') {
1182 char *uri = apr_pstrdup(r->pool, r->uri);
1187 /* If we have an cache->cached location that matches r->uri,
1188 * and the vhost's list of locations hasn't changed, we can skip
1189 * rewalking the location_walk entries.
1192 && (cache->dir_conf_tested == sec_ent)
1193 && (strcmp(entry_uri, cache->cached) == 0)) {
1194 /* Well this looks really familiar! If our end-result (per_dir_result)
1195 * didn't change, we have absolutely nothing to do :)
1196 * Otherwise (as is the case with most dir_merged/file_merged requests)
1197 * we must merge our dir_conf_merged onto this new r->per_dir_config.
1199 if (r->per_dir_config == cache->per_dir_result) {
1203 if (r->per_dir_config == cache->dir_conf_merged) {
1204 r->per_dir_config = cache->per_dir_result;
1208 if (cache->walked->nelts) {
1209 now_merged = ((walk_walked_t*)cache->walked->elts)
1210 [cache->walked->nelts - 1].merged;
1214 /* We start now_merged from NULL since we want to build
1215 * a locations list that can be merged to any vhost.
1218 int matches = cache->walked->nelts;
1219 walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
1220 cache->cached = entry_uri;
1222 /* Go through the location entries, and check for matches.
1223 * We apply the directive sections in given order, we should
1224 * really try them with the most general first.
1226 for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) {
1228 core_dir_config *entry_core;
1229 entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
1231 /* ### const strlen can be optimized in location config parsing */
1232 len = strlen(entry_core->d);
1234 /* Test the regex, fnmatch or string as appropriate.
1235 * If it's a strcmp, and the <Location > pattern was
1236 * not slash terminated, then this uri must be slash
1237 * terminated (or at the end of the string) to match.
1240 ? ap_regexec(entry_core->r, r->uri, 0, NULL, 0)
1241 : (entry_core->d_is_fnmatch
1242 ? apr_fnmatch(entry_core->d, cache->cached, APR_FNM_PATHNAME)
1243 : (strncmp(entry_core->d, cache->cached, len)
1244 || (entry_core->d[len - 1] != '/'
1245 && cache->cached[len] != '/'
1246 && cache->cached[len] != '\0')))) {
1250 /* If we merged this same section last time, reuse it
1253 if (last_walk->matched == sec_ent[sec_idx]) {
1254 now_merged = last_walk->merged;
1260 /* We fell out of sync. This is our own copy of walked,
1261 * so truncate the remaining matches and reset remaining.
1263 cache->walked->nelts -= matches;
1268 now_merged = ap_merge_per_dir_configs(r->pool,
1273 now_merged = sec_ent[sec_idx];
1276 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
1277 last_walk->matched = sec_ent[sec_idx];
1278 last_walk->merged = now_merged;
1281 /* Whoops - everything matched in sequence, but the original walk
1282 * found some additional matches. Truncate them.
1285 cache->walked->nelts -= matches;
1289 cache->dir_conf_tested = sec_ent;
1290 cache->dir_conf_merged = r->per_dir_config;
1292 /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
1293 * and note the end result to (potentially) skip this step next time.
1296 r->per_dir_config = ap_merge_per_dir_configs(r->pool,
1300 cache->per_dir_result = r->per_dir_config;
1305 AP_DECLARE(int) ap_file_walk(request_rec *r)
1307 ap_conf_vector_t *now_merged = NULL;
1308 core_dir_config *dconf = ap_get_module_config(r->per_dir_config,
1310 ap_conf_vector_t **sec_ent = (ap_conf_vector_t **)dconf->sec_file->elts;
1311 int num_sec = dconf->sec_file->nelts;
1312 walk_cache_t *cache;
1313 const char *test_file;
1315 /* To allow broken modules to proceed, we allow missing filenames to pass.
1316 * We will catch it later if it's heading for the core handler.
1317 * directory_walk already posted an INFO note for module debugging.
1319 if (r->filename == NULL) {
1323 cache = prep_walk_cache(AP_NOTE_FILE_WALK, r);
1325 /* No tricks here, there are just no <Files > to parse in this context.
1326 * We won't destroy the cache, just in case _this_ redirect is later
1327 * redirected again to a context containing the same or similar <Files >.
1333 /* Get the basename .. and copy for the cache just
1334 * in case r->filename is munged by another module
1336 test_file = strrchr(r->filename, '/');
1337 if (test_file == NULL) {
1338 test_file = apr_pstrdup(r->pool, r->filename);
1341 test_file = apr_pstrdup(r->pool, ++test_file);
1344 /* If we have an cache->cached file name that matches test_file,
1345 * and the directory's list of file sections hasn't changed, we
1346 * can skip rewalking the file_walk entries.
1349 && (cache->dir_conf_tested == sec_ent)
1350 && (strcmp(test_file, cache->cached) == 0)) {
1351 /* Well this looks really familiar! If our end-result (per_dir_result)
1352 * didn't change, we have absolutely nothing to do :)
1353 * Otherwise (as is the case with most dir_merged requests)
1354 * we must merge our dir_conf_merged onto this new r->per_dir_config.
1356 if (r->per_dir_config == cache->per_dir_result) {
1360 if (r->per_dir_config == cache->dir_conf_merged) {
1361 r->per_dir_config = cache->per_dir_result;
1365 if (cache->walked->nelts) {
1366 now_merged = ((walk_walked_t*)cache->walked->elts)
1367 [cache->walked->nelts - 1].merged;
1371 /* We start now_merged from NULL since we want to build
1372 * a file section list that can be merged to any dir_walk.
1375 int matches = cache->walked->nelts;
1376 walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
1377 cache->cached = test_file;
1379 /* Go through the location entries, and check for matches.
1380 * We apply the directive sections in given order, we should
1381 * really try them with the most general first.
1383 for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) {
1385 core_dir_config *entry_core;
1386 entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
1389 ? ap_regexec(entry_core->r, cache->cached , 0, NULL, 0)
1390 : (entry_core->d_is_fnmatch
1391 ? apr_fnmatch(entry_core->d, cache->cached, APR_FNM_PATHNAME)
1392 : strcmp(entry_core->d, cache->cached))) {
1396 /* If we merged this same section last time, reuse it
1399 if (last_walk->matched == sec_ent[sec_idx]) {
1400 now_merged = last_walk->merged;
1406 /* We fell out of sync. This is our own copy of walked,
1407 * so truncate the remaining matches and reset remaining.
1409 cache->walked->nelts -= matches;
1414 now_merged = ap_merge_per_dir_configs(r->pool,
1419 now_merged = sec_ent[sec_idx];
1422 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
1423 last_walk->matched = sec_ent[sec_idx];
1424 last_walk->merged = now_merged;
1427 /* Whoops - everything matched in sequence, but the original walk
1428 * found some additional matches. Truncate them.
1431 cache->walked->nelts -= matches;
1435 cache->dir_conf_tested = sec_ent;
1436 cache->dir_conf_merged = r->per_dir_config;
1438 /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
1439 * and note the end result to (potentially) skip this step next time.
1442 r->per_dir_config = ap_merge_per_dir_configs(r->pool,
1446 cache->per_dir_result = r->per_dir_config;
1451 /*****************************************************************
1453 * The sub_request mechanism.
1455 * Fns to look up a relative URI from, e.g., a map file or SSI document.
1456 * These do all access checks, etc., but don't actually run the transaction
1457 * ... use run_sub_req below for that. Also, be sure to use destroy_sub_req
1458 * as appropriate if you're likely to be creating more than a few of these.
1459 * (An early Apache version didn't destroy the sub_reqs used in directory
1460 * indexing. The result, when indexing a directory with 800-odd files in
1461 * it, was massively excessive storage allocation).
1463 * Note more manipulation of protocol-specific vars in the request
1467 static request_rec *make_sub_request(const request_rec *r,
1468 ap_filter_t *next_filter)
1473 apr_pool_create(&rrp, r->pool);
1474 apr_pool_tag(rrp, "subrequest");
1475 rnew = apr_pcalloc(rrp, sizeof(request_rec));
1478 rnew->hostname = r->hostname;
1479 rnew->request_time = r->request_time;
1480 rnew->connection = r->connection;
1481 rnew->server = r->server;
1483 rnew->request_config = ap_create_request_config(rnew->pool);
1485 /* Start a clean config from this subrequest's vhost. Optimization in
1486 * Location/File/Dir walks from the parent request assure that if the
1487 * config blocks of the subrequest match the parent request, no merges
1488 * will actually occur (and generally a minimal number of merges are
1489 * required, even if the parent and subrequest aren't quite identical.)
1491 rnew->per_dir_config = r->server->lookup_defaults;
1493 rnew->htaccess = r->htaccess;
1494 rnew->allowed_methods = ap_make_method_list(rnew->pool, 2);
1496 /* make a copy of the allowed-methods list */
1497 ap_copy_method_list(rnew->allowed_methods, r->allowed_methods);
1499 /* start with the same set of output filters */
1501 /* while there are no input filters for a subrequest, we will
1502 * try to insert some, so if we don't have valid data, the code
1505 rnew->input_filters = r->input_filters;
1506 rnew->proto_input_filters = r->proto_input_filters;
1507 rnew->output_filters = next_filter;
1508 rnew->proto_output_filters = r->proto_output_filters;
1509 ap_add_output_filter_handle(ap_subreq_core_filter_handle,
1510 NULL, rnew, rnew->connection);
1513 /* If NULL - we are expecting to be internal_fast_redirect'ed
1514 * to this subrequest - or this request will never be invoked.
1515 * Ignore the original request filter stack entirely, and
1516 * drill the input and output stacks back to the connection.
1518 rnew->proto_input_filters = r->proto_input_filters;
1519 rnew->proto_output_filters = r->proto_output_filters;
1521 rnew->input_filters = r->proto_input_filters;
1522 rnew->output_filters = r->proto_output_filters;
1525 /* no input filters for a subrequest */
1527 ap_set_sub_req_protocol(rnew, r);
1529 /* We have to run this after we fill in sub req vars,
1530 * or the r->main pointer won't be setup
1532 ap_run_create_request(rnew);
1537 AP_CORE_DECLARE_NONSTD(apr_status_t) ap_sub_req_output_filter(ap_filter_t *f,
1538 apr_bucket_brigade *bb)
1540 apr_bucket *e = APR_BRIGADE_LAST(bb);
1542 if (APR_BUCKET_IS_EOS(e)) {
1543 apr_bucket_delete(e);
1546 if (!APR_BRIGADE_EMPTY(bb)) {
1547 return ap_pass_brigade(f->next, bb);
1554 AP_DECLARE(int) ap_some_auth_required(request_rec *r)
1556 /* Is there a require line configured for the type of *this* req? */
1558 const apr_array_header_t *reqs_arr = ap_requires(r);
1566 reqs = (require_line *) reqs_arr->elts;
1568 for (i = 0; i < reqs_arr->nelts; ++i) {
1569 if (reqs[i].method_mask & (AP_METHOD_BIT << r->method_number)) {
1578 AP_DECLARE(request_rec *) ap_sub_req_method_uri(const char *method,
1579 const char *new_uri,
1580 const request_rec *r,
1581 ap_filter_t *next_filter)
1587 rnew = make_sub_request(r, next_filter);
1589 /* would be nicer to pass "method" to ap_set_sub_req_protocol */
1590 rnew->method = method;
1591 rnew->method_number = ap_method_number_of(method);
1593 if (new_uri[0] == '/') {
1594 ap_parse_uri(rnew, new_uri);
1597 udir = ap_make_dirstr_parent(rnew->pool, r->uri);
1598 udir = ap_escape_uri(rnew->pool, udir); /* re-escape it */
1599 ap_parse_uri(rnew, ap_make_full_path(rnew->pool, udir, new_uri));
1602 /* We cannot return NULL without violating the API. So just turn this
1603 * subrequest into a 500 to indicate the failure. */
1604 if (ap_is_recursion_limit_exceeded(r)) {
1605 rnew->status = HTTP_INTERNAL_SERVER_ERROR;
1610 * If the content can be served by the quick_handler, we can
1611 * safely bypass request_internal processing.
1613 res = ap_run_quick_handler(rnew, 1);
1616 if ((res = ap_process_request_internal(rnew))) {
1624 AP_DECLARE(request_rec *) ap_sub_req_lookup_uri(const char *new_uri,
1625 const request_rec *r,
1626 ap_filter_t *next_filter)
1628 return ap_sub_req_method_uri("GET", new_uri, r, next_filter);
1631 AP_DECLARE(request_rec *) ap_sub_req_lookup_dirent(const apr_finfo_t *dirent,
1632 const request_rec *r,
1634 ap_filter_t *next_filter)
1641 rnew = make_sub_request(r, next_filter);
1643 /* Special case: we are looking at a relative lookup in the same directory.
1644 * This is 100% safe, since dirent->name just came from the filesystem.
1646 if (r->path_info && *r->path_info) {
1647 /* strip path_info off the end of the uri to keep it in sync
1648 * with r->filename, which has already been stripped by directory_walk,
1649 * merge the dirent->name, and then, if the caller wants us to remerge
1650 * the original path info, do so. Note we never fix the path_info back
1651 * to r->filename, since dir_walk would do so (but we don't expect it
1652 * to happen in the usual cases)
1654 udir = apr_pstrdup(rnew->pool, r->uri);
1655 udir[ap_find_path_info(udir, r->path_info)] = '\0';
1656 udir = ap_make_dirstr_parent(rnew->pool, udir);
1658 rnew->uri = ap_make_full_path(rnew->pool, udir, dirent->name);
1659 if (subtype == AP_SUBREQ_MERGE_ARGS) {
1660 rnew->uri = ap_make_full_path(rnew->pool, rnew->uri, r->path_info + 1);
1661 rnew->path_info = apr_pstrdup(rnew->pool, r->path_info);
1663 rnew->uri = ap_escape_uri(rnew->pool, rnew->uri);
1666 udir = ap_make_dirstr_parent(rnew->pool, r->uri);
1667 rnew->uri = ap_escape_uri(rnew->pool, ap_make_full_path(rnew->pool,
1672 fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
1673 rnew->filename = ap_make_full_path(rnew->pool, fdir, dirent->name);
1674 if (r->canonical_filename == r->filename) {
1675 rnew->canonical_filename = rnew->filename;
1678 /* XXX This is now less relevant; we will do a full location walk
1679 * these days for this case. Preserve the apr_stat results, and
1680 * perhaps we also tag that symlinks were tested and/or found for
1683 rnew->per_dir_config = r->server->lookup_defaults;
1685 if ((dirent->valid & APR_FINFO_MIN) != APR_FINFO_MIN) {
1687 * apr_dir_read isn't very complete on this platform, so
1688 * we need another apr_stat (with or without APR_FINFO_LINK
1689 * depending on whether we allow all symlinks here.) If this
1690 * is an APR_LNK that resolves to an APR_DIR, then we will rerun
1691 * everything anyways... this should be safe.
1694 if (ap_allow_options(rnew) & OPT_SYM_LINKS) {
1695 if (((rv = apr_stat(&rnew->finfo, rnew->filename,
1696 APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
1697 && (rv != APR_INCOMPLETE)) {
1698 rnew->finfo.filetype = 0;
1702 if (((rv = apr_stat(&rnew->finfo, rnew->filename,
1703 APR_FINFO_LINK | APR_FINFO_MIN,
1704 rnew->pool)) != APR_SUCCESS)
1705 && (rv != APR_INCOMPLETE)) {
1706 rnew->finfo.filetype = 0;
1711 memcpy(&rnew->finfo, dirent, sizeof(apr_finfo_t));
1714 if (rnew->finfo.filetype == APR_LNK) {
1716 * Resolve this symlink. We should tie this back to dir_walk's cache
1718 if ((res = resolve_symlink(rnew->filename, &rnew->finfo,
1719 ap_allow_options(rnew), rnew->pool))
1726 if (rnew->finfo.filetype == APR_DIR) {
1727 /* ap_make_full_path overallocated the buffers
1728 * by one character to help us out here.
1730 strcpy(rnew->filename + strlen(rnew->filename), "/");
1731 if (!rnew->path_info || !*rnew->path_info) {
1732 strcpy(rnew->uri + strlen(rnew->uri ), "/");
1736 /* fill in parsed_uri values
1738 if (r->args && *r->args && (subtype == AP_SUBREQ_MERGE_ARGS)) {
1739 ap_parse_uri(rnew, apr_pstrcat(r->pool, rnew->uri, "?",
1743 ap_parse_uri(rnew, rnew->uri);
1746 /* We cannot return NULL without violating the API. So just turn this
1747 * subrequest into a 500. */
1748 if (ap_is_recursion_limit_exceeded(r)) {
1749 rnew->status = HTTP_INTERNAL_SERVER_ERROR;
1753 if ((res = ap_process_request_internal(rnew))) {
1760 AP_DECLARE(request_rec *) ap_sub_req_lookup_file(const char *new_file,
1761 const request_rec *r,
1762 ap_filter_t *next_filter)
1769 rnew = make_sub_request(r, next_filter);
1771 fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
1772 fdirlen = strlen(fdir);
1774 /* Translate r->filename, if it was canonical, it stays canonical
1776 if (r->canonical_filename == r->filename) {
1777 rnew->canonical_filename = (char*)(1);
1780 if (apr_filepath_merge(&rnew->filename, fdir, new_file,
1781 APR_FILEPATH_TRUENAME, rnew->pool) != APR_SUCCESS) {
1782 rnew->status = HTTP_FORBIDDEN;
1786 if (rnew->canonical_filename) {
1787 rnew->canonical_filename = rnew->filename;
1791 * Check for a special case... if there are no '/' characters in new_file
1792 * at all, and the path was the same, then we are looking at a relative
1793 * lookup in the same directory. Fixup the URI to match.
1796 if (strncmp(rnew->filename, fdir, fdirlen) == 0
1797 && rnew->filename[fdirlen]
1798 && ap_strchr_c(rnew->filename + fdirlen, '/') == NULL) {
1800 if (ap_allow_options(rnew) & OPT_SYM_LINKS) {
1801 if (((rv = apr_stat(&rnew->finfo, rnew->filename,
1802 APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
1803 && (rv != APR_INCOMPLETE)) {
1804 rnew->finfo.filetype = 0;
1808 if (((rv = apr_stat(&rnew->finfo, rnew->filename,
1809 APR_FINFO_LINK | APR_FINFO_MIN,
1810 rnew->pool)) != APR_SUCCESS)
1811 && (rv != APR_INCOMPLETE)) {
1812 rnew->finfo.filetype = 0;
1816 if (r->uri && *r->uri) {
1817 char *udir = ap_make_dirstr_parent(rnew->pool, r->uri);
1818 rnew->uri = ap_make_full_path(rnew->pool, udir,
1819 rnew->filename + fdirlen);
1820 ap_parse_uri(rnew, rnew->uri); /* fill in parsed_uri values */
1823 ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */
1824 rnew->uri = apr_pstrdup(rnew->pool, "");
1828 /* XXX: @@@: What should be done with the parsed_uri values?
1829 * We would be better off stripping down to the 'common' elements
1830 * of the path, then reassembling the URI as best as we can.
1832 ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */
1834 * XXX: this should be set properly like it is in the same-dir case
1835 * but it's actually sometimes to impossible to do it... because the
1836 * file may not have a uri associated with it -djg
1838 rnew->uri = apr_pstrdup(rnew->pool, "");
1841 /* We cannot return NULL without violating the API. So just turn this
1842 * subrequest into a 500. */
1843 if (ap_is_recursion_limit_exceeded(r)) {
1844 rnew->status = HTTP_INTERNAL_SERVER_ERROR;
1848 if ((res = ap_process_request_internal(rnew))) {
1855 AP_DECLARE(int) ap_run_sub_req(request_rec *r)
1857 int retval = DECLINED;
1858 /* Run the quick handler if the subrequest is not a dirent or file
1861 if (!(r->filename && r->finfo.filetype)) {
1862 retval = ap_run_quick_handler(r, 0);
1865 retval = ap_invoke_handler(r);
1866 if (retval == DONE) {
1870 ap_finalize_sub_req_protocol(r);
1874 AP_DECLARE(void) ap_destroy_sub_req(request_rec *r)
1876 /* Reclaim the space */
1877 apr_pool_destroy(r->pool);
1881 * Function to set the r->mtime field to the specified value if it's later
1882 * than what's already there.
1884 AP_DECLARE(void) ap_update_mtime(request_rec *r, apr_time_t dependency_mtime)
1886 if (r->mtime < dependency_mtime) {
1887 r->mtime = dependency_mtime;
1892 * Is it the initial main request, which we only get *once* per HTTP request?
1894 AP_DECLARE(int) ap_is_initial_req(request_rec *r)
1896 return (r->main == NULL) /* otherwise, this is a sub-request */
1897 && (r->prev == NULL); /* otherwise, this is an internal redirect */