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.
19 * @brief functions to get and process requests
21 * @author Rob McCool 3/21/93
23 * Thoroughly revamped by rst for Apache. NB this file reads
24 * best from the bottom up.
28 #include "apr_strings.h"
29 #include "apr_file_io.h"
30 #include "apr_fnmatch.h"
32 #define APR_WANT_STRFUNC
36 #include "ap_config.h"
38 #include "http_config.h"
39 #include "http_request.h"
40 #include "http_core.h"
41 #include "http_protocol.h"
43 #include "http_main.h"
44 #include "util_filter.h"
45 #include "util_charset.h"
46 #include "util_script.h"
55 APR_HOOK_LINK(translate_name)
56 APR_HOOK_LINK(map_to_storage)
57 APR_HOOK_LINK(check_user_id)
59 APR_HOOK_LINK(type_checker)
60 APR_HOOK_LINK(access_checker)
61 APR_HOOK_LINK(auth_checker)
62 APR_HOOK_LINK(insert_filter)
63 APR_HOOK_LINK(create_request)
66 AP_IMPLEMENT_HOOK_RUN_FIRST(int,translate_name,
67 (request_rec *r), (r), DECLINED)
68 AP_IMPLEMENT_HOOK_RUN_FIRST(int,map_to_storage,
69 (request_rec *r), (r), DECLINED)
70 AP_IMPLEMENT_HOOK_RUN_FIRST(int,check_user_id,
71 (request_rec *r), (r), DECLINED)
72 AP_IMPLEMENT_HOOK_RUN_ALL(int,fixups,
73 (request_rec *r), (r), OK, DECLINED)
74 AP_IMPLEMENT_HOOK_RUN_FIRST(int,type_checker,
75 (request_rec *r), (r), DECLINED)
76 AP_IMPLEMENT_HOOK_RUN_ALL(int,access_checker,
77 (request_rec *r), (r), OK, DECLINED)
78 AP_IMPLEMENT_HOOK_RUN_FIRST(int,auth_checker,
79 (request_rec *r), (r), DECLINED)
80 AP_IMPLEMENT_HOOK_VOID(insert_filter, (request_rec *r), (r))
81 AP_IMPLEMENT_HOOK_RUN_ALL(int, create_request,
82 (request_rec *r), (r), OK, DECLINED)
85 static int decl_die(int status, char *phase, request_rec *r)
87 if (status == DECLINED) {
88 ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r,
89 "configuration error: couldn't %s: %s", phase, r->uri);
90 return HTTP_INTERNAL_SERVER_ERROR;
97 /* This is the master logic for processing requests. Do NOT duplicate
98 * this logic elsewhere, or the security model will be broken by future
99 * API changes. Each phase must be individually optimized to pick up
100 * redundant/duplicate calls by subrequests, and redirects.
102 AP_DECLARE(int) ap_process_request_internal(request_rec *r)
104 int file_req = (r->main && r->filename);
107 /* Ignore embedded %2F's in path for proxy requests */
108 if (!r->proxyreq && r->parsed_uri.path) {
110 d = ap_get_module_config(r->per_dir_config, &core_module);
111 if (d->allow_encoded_slashes) {
112 access_status = ap_unescape_url_keep2f(r->parsed_uri.path);
115 access_status = ap_unescape_url(r->parsed_uri.path);
118 if (access_status == HTTP_NOT_FOUND) {
119 if (! d->allow_encoded_slashes) {
120 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
121 "found %%2f (encoded '/') in URI "
122 "(decoded='%s'), returning 404",
126 return access_status;
130 ap_getparents(r->uri); /* OK --- shrinking transformations... */
132 /* All file subrequests are a huge pain... they cannot bubble through the
133 * next several steps. Only file subrequests are allowed an empty uri,
134 * otherwise let translate_name kill the request.
137 if ((access_status = ap_location_walk(r))) {
138 return access_status;
141 if ((access_status = ap_run_translate_name(r))) {
142 return decl_die(access_status, "translate", r);
146 /* Reset to the server default config prior to running map_to_storage
148 r->per_dir_config = r->server->lookup_defaults;
150 if ((access_status = ap_run_map_to_storage(r))) {
151 /* This request wasn't in storage (e.g. TRACE) */
152 return access_status;
155 /* Excluding file-specific requests with no 'true' URI...
158 /* Rerun the location walk, which overrides any map_to_storage config.
160 if ((access_status = ap_location_walk(r))) {
161 return access_status;
165 /* Only on the main request! */
166 if (r->main == NULL) {
167 if ((access_status = ap_run_header_parser(r))) {
168 return access_status;
172 /* Skip authn/authz if the parent or prior request passed the authn/authz,
173 * and that configuration didn't change (this requires optimized _walk()
174 * functions in map_to_storage that use the same merge results given
175 * identical input.) If the config changes, we must re-auth.
177 if (r->main && (r->main->per_dir_config == r->per_dir_config)) {
178 r->user = r->main->user;
179 r->ap_auth_type = r->main->ap_auth_type;
181 else if (r->prev && (r->prev->per_dir_config == r->per_dir_config)) {
182 r->user = r->prev->user;
183 r->ap_auth_type = r->prev->ap_auth_type;
186 switch (ap_satisfies(r)) {
189 if ((access_status = ap_run_access_checker(r)) != 0) {
190 return decl_die(access_status, "check access", r);
193 if (ap_some_auth_required(r)) {
194 if (((access_status = ap_run_check_user_id(r)) != 0)
195 || !ap_auth_type(r)) {
196 return decl_die(access_status, ap_auth_type(r)
197 ? "check user. No user file?"
198 : "perform authentication. AuthType not set!",
202 if (((access_status = ap_run_auth_checker(r)) != 0)
203 || !ap_auth_type(r)) {
204 return decl_die(access_status, ap_auth_type(r)
205 ? "check access. No groups file?"
206 : "perform authentication. AuthType not set!",
213 if (((access_status = ap_run_access_checker(r)) != 0)) {
214 if (!ap_some_auth_required(r)) {
215 return decl_die(access_status, "check access", r);
218 if (((access_status = ap_run_check_user_id(r)) != 0)
219 || !ap_auth_type(r)) {
220 return decl_die(access_status, ap_auth_type(r)
221 ? "check user. No user file?"
222 : "perform authentication. AuthType not set!",
226 if (((access_status = ap_run_auth_checker(r)) != 0)
227 || !ap_auth_type(r)) {
228 return decl_die(access_status, ap_auth_type(r)
229 ? "check access. No groups file?"
230 : "perform authentication. AuthType not set!",
237 /* XXX Must make certain the ap_run_type_checker short circuits mime
238 * in mod-proxy for r->proxyreq && r->parsed_uri.scheme
239 * && !strcmp(r->parsed_uri.scheme, "http")
241 if ((access_status = ap_run_type_checker(r)) != 0) {
242 return decl_die(access_status, "find types", r);
245 if ((access_status = ap_run_fixups(r)) != 0) {
246 return access_status;
253 /* Useful caching structures to repeat _walk/merge sequences as required
254 * when a subrequest or redirect reuses substantially the same config.
256 * Directive order in the httpd.conf file and its Includes significantly
257 * impact this optimization. Grouping common blocks at the front of the
258 * config that are less likely to change between a request and
259 * its subrequests, or between a request and its redirects reduced
260 * the work of these functions significantly.
263 typedef struct walk_walked_t {
264 ap_conf_vector_t *matched; /* A dir_conf sections we matched */
265 ap_conf_vector_t *merged; /* The dir_conf merged result */
268 typedef struct walk_cache_t {
269 const char *cached; /* The identifier we matched */
270 ap_conf_vector_t **dir_conf_tested; /* The sections we matched against */
271 ap_conf_vector_t *dir_conf_merged; /* Base per_dir_config */
272 ap_conf_vector_t *per_dir_result; /* per_dir_config += walked result */
273 apr_array_header_t *walked; /* The list of walk_walked_t results */
276 static walk_cache_t *prep_walk_cache(apr_size_t t, request_rec *r)
281 /* Find the most relevant, recent entry to work from. That would be
282 * this request (on the second call), or the parent request of a
283 * subrequest, or the prior request of an internal redirect. Provide
284 * this _walk()er with a copy it is allowed to munge. If there is no
285 * parent or prior cached request, then create a new walk cache.
287 note = ap_get_request_note(r, t);
292 if (!(cache = *note)) {
296 && ((inherit_note = ap_get_request_note(r->main, t)))
299 && ((inherit_note = ap_get_request_note(r->prev, t)))
301 cache = apr_pmemdup(r->pool, *inherit_note,
303 cache->walked = apr_array_copy(r->pool, cache->walked);
306 cache = apr_pcalloc(r->pool, sizeof(*cache));
307 cache->walked = apr_array_make(r->pool, 4, sizeof(walk_walked_t));
315 /*****************************************************************
317 * Getting and checking directory configuration. Also checks the
318 * FollowSymlinks and FollowSymOwner stuff, since this is really the
319 * only place that can happen (barring a new mid_dir_walk callout).
321 * We can't do it as an access_checker module function which gets
322 * called with the final per_dir_config, since we could have a directory
323 * with FollowSymLinks disabled, which contains a symlink to another
324 * with a .htaccess file which turns FollowSymLinks back on --- and
325 * access in such a case must be denied. So, whatever it is that
326 * checks FollowSymLinks needs to know the state of the options as
327 * they change, all the way down.
332 * resolve_symlink must _always_ be called on an APR_LNK file type!
333 * It will resolve the actual target file type, modification date, etc,
334 * and provide any processing required for symlink evaluation.
335 * Path must already be cleaned, no trailing slash, no multi-slashes,
336 * and don't call this on the root!
338 * Simply, the number of times we deref a symlink are minimal compared
339 * to the number of times we had an extra lstat() since we 'weren't sure'.
341 * To optimize, we stat() anything when given (opts & OPT_SYM_LINKS), otherwise
342 * we start off with an lstat(). Every lstat() must be dereferenced in case
343 * it points at a 'nasty' - we must always rerun check_safe_file (or similar.)
345 static int resolve_symlink(char *d, apr_finfo_t *lfi, int opts, apr_pool_t *p)
349 const char *savename;
351 if (!(opts & (OPT_SYM_OWNER | OPT_SYM_LINKS))) {
352 return HTTP_FORBIDDEN;
355 /* Save the name from the valid bits. */
356 savename = (lfi->valid & APR_FINFO_NAME) ? lfi->name : NULL;
358 if (opts & OPT_SYM_LINKS) {
359 if ((res = apr_stat(&fi, d, lfi->valid & ~(APR_FINFO_NAME
360 | APR_FINFO_LINK), p))
362 return HTTP_FORBIDDEN;
365 /* Give back the target */
366 memcpy(lfi, &fi, sizeof(fi));
368 lfi->name = savename;
369 lfi->valid |= APR_FINFO_NAME;
375 /* OPT_SYM_OWNER only works if we can get the owner of
376 * both the file and symlink. First fill in a missing
377 * owner of the symlink, then get the info of the target.
379 if (!(lfi->valid & APR_FINFO_OWNER)) {
380 if ((res = apr_stat(&fi, d,
381 lfi->valid | APR_FINFO_LINK | APR_FINFO_OWNER, p))
383 return HTTP_FORBIDDEN;
387 if ((res = apr_stat(&fi, d, lfi->valid & ~(APR_FINFO_NAME), p))
389 return HTTP_FORBIDDEN;
392 if (apr_uid_compare(fi.user, lfi->user) != APR_SUCCESS) {
393 return HTTP_FORBIDDEN;
396 /* Give back the target */
397 memcpy(lfi, &fi, sizeof(fi));
399 lfi->name = savename;
400 lfi->valid |= APR_FINFO_NAME;
408 * As we walk the directory configuration, the merged config won't
409 * be 'rooted' to a specific vhost until the very end of the merge.
411 * We need a very fast mini-merge to a real, vhost-rooted merge
412 * of core.opts and core.override, the only options tested within
413 * directory_walk itself.
415 * See core.c::merge_core_dir_configs() for explanation.
418 typedef struct core_opts_t {
419 allow_options_t opts;
421 allow_options_t remove;
422 overrides_t override;
423 overrides_t override_opts;
426 static void core_opts_merge(const ap_conf_vector_t *sec, core_opts_t *opts)
428 core_dir_config *this_dir = ap_get_module_config(sec, &core_module);
434 if (this_dir->opts & OPT_UNSET) {
435 opts->add = (opts->add & ~this_dir->opts_remove)
436 | this_dir->opts_add;
437 opts->remove = (opts->remove & ~this_dir->opts_add)
438 | this_dir->opts_remove;
439 opts->opts = (opts->opts & ~opts->remove) | opts->add;
442 opts->opts = this_dir->opts;
443 opts->add = this_dir->opts_add;
444 opts->remove = this_dir->opts_remove;
447 if (!(this_dir->override & OR_UNSET)) {
448 opts->override = this_dir->override;
450 if (!(this_dir->override_opts & OR_UNSET)) {
451 opts->override_opts = this_dir->override_opts;
456 /*****************************************************************
458 * Getting and checking directory configuration. Also checks the
459 * FollowSymlinks and FollowSymOwner stuff, since this is really the
460 * only place that can happen (barring a new mid_dir_walk callout).
462 * We can't do it as an access_checker module function which gets
463 * called with the final per_dir_config, since we could have a directory
464 * with FollowSymLinks disabled, which contains a symlink to another
465 * with a .htaccess file which turns FollowSymLinks back on --- and
466 * access in such a case must be denied. So, whatever it is that
467 * checks FollowSymLinks needs to know the state of the options as
468 * they change, all the way down.
471 AP_DECLARE(int) ap_directory_walk(request_rec *r)
473 ap_conf_vector_t *now_merged = NULL;
474 core_server_config *sconf = ap_get_module_config(r->server->module_config,
476 ap_conf_vector_t **sec_ent = (ap_conf_vector_t **) sconf->sec_dir->elts;
477 int num_sec = sconf->sec_dir->nelts;
482 /* XXX: Better (faster) tests needed!!!
484 * "OK" as a response to a real problem is not _OK_, but to allow broken
485 * modules to proceed, we will permit the not-a-path filename to pass the
486 * following two tests. This behavior may be revoked in future versions
487 * of Apache. We still must catch it later if it's heading for the core
488 * handler. Leave INFO notes here for module debugging.
490 if (r->filename == NULL) {
491 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
492 "Module bug? Request filename is missing for URI %s",
497 /* Canonicalize the file path without resolving filename case or aliases
498 * so we can begin by checking the cache for a recent directory walk.
499 * This call will ensure we have an absolute path in the same pass.
501 if ((rv = apr_filepath_merge(&entry_dir, NULL, r->filename,
502 APR_FILEPATH_NOTRELATIVE, r->pool))
504 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
505 "Module bug? Request filename path %s is invalid or "
506 "or not absolute for uri %s",
507 r->filename, r->uri);
511 /* XXX Notice that this forces path_info to be canonical. That might
512 * not be desired by all apps. However, some of those same apps likely
513 * have significant security holes.
515 r->filename = entry_dir;
517 cache = prep_walk_cache(AP_NOTE_DIRECTORY_WALK, r);
519 /* If this is not a dirent subrequest with a preconstructed
520 * r->finfo value, then we can simply stat the filename to
521 * save burning mega-cycles with unneeded stats - if this is
522 * an exact file match. We don't care about failure... we
523 * will stat by component failing this meager attempt.
525 * It would be nice to distinguish APR_ENOENT from other
526 * types of failure, such as APR_ENOTDIR. We can do something
527 * with APR_ENOENT, knowing that the path is good.
529 if (!r->finfo.filetype || r->finfo.filetype == APR_LNK) {
530 rv = apr_stat(&r->finfo, r->filename, APR_FINFO_MIN, r->pool);
532 /* some OSs will return APR_SUCCESS/APR_REG if we stat
533 * a regular file but we have '/' at the end of the name;
535 * other OSs will return APR_ENOTDIR for that situation;
537 * handle it the same everywhere by simulating a failure
538 * if it looks like a directory but really isn't
540 * Also reset if the stat failed, just for safety.
542 if ((rv != APR_SUCCESS) ||
543 (r->finfo.filetype &&
544 (r->finfo.filetype != APR_DIR) &&
545 (r->filename[strlen(r->filename) - 1] == '/'))) {
546 r->finfo.filetype = 0; /* forget what we learned */
550 if (r->finfo.filetype == APR_REG) {
551 entry_dir = ap_make_dirstr_parent(r->pool, entry_dir);
553 else if (r->filename[strlen(r->filename) - 1] != '/') {
554 entry_dir = apr_pstrcat(r->pool, r->filename, "/", NULL);
557 /* If we have a file already matches the path of r->filename,
558 * and the vhost's list of directory sections hasn't changed,
559 * we can skip rewalking the directory_walk entries.
562 && ((r->finfo.filetype == APR_REG)
563 || ((r->finfo.filetype == APR_DIR)
564 && (!r->path_info || !*r->path_info)))
565 && (cache->dir_conf_tested == sec_ent)
566 && (strcmp(entry_dir, cache->cached) == 0)) {
567 /* Well this looks really familiar! If our end-result (per_dir_result)
568 * didn't change, we have absolutely nothing to do :)
569 * Otherwise (as is the case with most dir_merged/file_merged requests)
570 * we must merge our dir_conf_merged onto this new r->per_dir_config.
572 if (r->per_dir_config == cache->per_dir_result) {
576 if (r->per_dir_config == cache->dir_conf_merged) {
577 r->per_dir_config = cache->per_dir_result;
581 if (cache->walked->nelts) {
582 now_merged = ((walk_walked_t*)cache->walked->elts)
583 [cache->walked->nelts - 1].merged;
587 /* We start now_merged from NULL since we want to build
588 * a locations list that can be merged to any vhost.
591 int matches = cache->walked->nelts;
592 walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
593 core_dir_config *this_dir;
595 apr_finfo_t thisinfo;
596 char *save_path_info;
599 unsigned int seg, startseg;
601 /* Invariant: from the first time filename_len is set until
602 * it goes out of scope, filename_len==strlen(r->filename)
604 apr_size_t filename_len;
605 #ifdef CASE_BLIND_FILESYSTEM
606 apr_size_t canonical_len;
610 * We must play our own mini-merge game here, for the few
611 * running dir_config values we care about within dir_walk.
612 * We didn't start the merge from r->per_dir_config, so we
613 * accumulate opts and override as we merge, from the globals.
615 this_dir = ap_get_module_config(r->per_dir_config, &core_module);
616 opts.opts = this_dir->opts;
617 opts.add = this_dir->opts_add;
618 opts.remove = this_dir->opts_remove;
619 opts.override = this_dir->override;
621 /* Set aside path_info to merge back onto path_info later.
622 * If r->filename is a directory, we must remerge the path_info,
623 * before we continue! [Directories cannot, by defintion, have
624 * path info. Either the next segment is not-found, or a file.]
626 * r->path_info tracks the unconsumed source path.
627 * r->filename tracks the path as we process it
629 if ((r->finfo.filetype == APR_DIR) && r->path_info && *r->path_info)
631 if ((rv = apr_filepath_merge(&r->path_info, r->filename,
633 APR_FILEPATH_NOTABOVEROOT, r->pool))
635 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
636 "dir_walk error, path_info %s is not relative "
637 "to the filename path %s for uri %s",
638 r->path_info, r->filename, r->uri);
639 return HTTP_INTERNAL_SERVER_ERROR;
642 save_path_info = NULL;
645 save_path_info = r->path_info;
646 r->path_info = r->filename;
649 #ifdef CASE_BLIND_FILESYSTEM
652 while (r->canonical_filename && r->canonical_filename[canonical_len]
653 && (r->canonical_filename[canonical_len]
654 == r->path_info[canonical_len])) {
659 && ((r->canonical_filename[canonical_len - 1] != '/'
660 && r->canonical_filename[canonical_len - 1])
661 || (r->path_info[canonical_len - 1] != '/'
662 && r->path_info[canonical_len - 1]))) {
667 * Now build r->filename component by component, starting
668 * with the root (on Unix, simply "/"). We will make a huge
669 * assumption here for efficiency, that any canonical path
670 * already given included a canonical root.
672 rv = apr_filepath_root((const char **)&r->filename,
673 (const char **)&r->path_info,
674 canonical_len ? 0 : APR_FILEPATH_TRUENAME,
676 filename_len = strlen(r->filename);
679 * Bad assumption above? If the root's length is longer
680 * than the canonical length, then it cannot be trusted as
681 * a truename. So try again, this time more seriously.
683 if ((rv == APR_SUCCESS) && canonical_len
684 && (filename_len > canonical_len)) {
685 rv = apr_filepath_root((const char **)&r->filename,
686 (const char **)&r->path_info,
687 APR_FILEPATH_TRUENAME, r->pool);
688 filename_len = strlen(r->filename);
692 #else /* ndef CASE_BLIND_FILESYSTEM, really this simple for Unix today; */
694 rv = apr_filepath_root((const char **)&r->filename,
695 (const char **)&r->path_info,
697 filename_len = strlen(r->filename);
701 if (rv != APR_SUCCESS) {
702 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
703 "dir_walk error, could not determine the root "
704 "path of filename %s%s for uri %s",
705 r->filename, r->path_info, r->uri);
706 return HTTP_INTERNAL_SERVER_ERROR;
709 /* Working space for terminating null and an extra / is required.
711 buflen = filename_len + strlen(r->path_info) + 2;
712 buf = apr_palloc(r->pool, buflen);
713 memcpy(buf, r->filename, filename_len + 1);
715 thisinfo.valid = APR_FINFO_TYPE;
716 thisinfo.filetype = APR_DIR; /* It's the root, of course it's a dir */
719 * seg keeps track of which segment we've copied.
720 * sec_idx keeps track of which section we're on, since sections are
721 * ordered by number of segments. See core_reorder_directories
722 * startseg tells us how many segments describe the root path
723 * e.g. the complete path "//host/foo/" to a UNC share (4)
725 startseg = seg = ap_count_dirs(r->filename);
729 * Go down the directory hierarchy. Where we have to check for
730 * symlinks, do so. Where a .htaccess file has permission to
731 * override anything, try to find one.
739 /* We have no trailing slash, but we sure would appreciate one.
740 * However, we don't want to append a / our first time through.
742 if ((seg > startseg) && r->filename[filename_len-1] != '/') {
743 r->filename[filename_len++] = '/';
744 r->filename[filename_len] = 0;
748 /* Begin *this* level by looking for matching <Directory> sections
749 * from the server config.
751 for (; sec_idx < num_sec; ++sec_idx) {
753 ap_conf_vector_t *entry_config = sec_ent[sec_idx];
754 core_dir_config *entry_core;
755 entry_core = ap_get_module_config(entry_config, &core_module);
757 /* No more possible matches for this many segments?
758 * We are done when we find relative/regex/longer components.
760 if (entry_core->r || entry_core->d_components > seg) {
764 /* We will never skip '0' element components, e.g. plain old
765 * <Directory >, and <Directory "/"> are classified as zero
766 * so that Win32/Netware/OS2 etc all pick them up.
767 * Otherwise, skip over the mismatches.
769 if (entry_core->d_components
770 && ((entry_core->d_components < seg)
771 || (entry_core->d_is_fnmatch
772 ? (apr_fnmatch(entry_core->d, r->filename,
773 APR_FNM_PATHNAME) != APR_SUCCESS)
774 : (strcmp(r->filename, entry_core->d) != 0)))) {
778 /* If we haven't continue'd above, we have a match.
780 * Calculate our full-context core opts & override.
782 core_opts_merge(sec_ent[sec_idx], &opts);
784 /* If we merged this same section last time, reuse it
787 if (last_walk->matched == sec_ent[sec_idx]) {
788 now_merged = last_walk->merged;
794 /* We fell out of sync. This is our own copy of walked,
795 * so truncate the remaining matches and reset remaining.
797 cache->walked->nelts -= matches;
802 now_merged = ap_merge_per_dir_configs(r->pool,
807 now_merged = sec_ent[sec_idx];
810 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
811 last_walk->matched = sec_ent[sec_idx];
812 last_walk->merged = now_merged;
815 /* If .htaccess files are enabled, check for one, provided we
816 * have reached a real path.
818 do { /* Not really a loop, just a break'able code block */
820 ap_conf_vector_t *htaccess_conf = NULL;
822 /* No htaccess in an incomplete root path,
823 * nor if it's disabled
825 if (seg < startseg || !opts.override) {
829 res = ap_parse_htaccess(&htaccess_conf, r, opts.override,
831 apr_pstrdup(r->pool, r->filename),
837 if (!htaccess_conf) {
841 /* If we are still here, we found our htaccess.
843 * Calculate our full-context core opts & override.
845 core_opts_merge(htaccess_conf, &opts);
847 /* If we merged this same htaccess last time, reuse it...
848 * this wouldn't work except that we cache the htaccess
849 * sections for the lifetime of the request, so we match
850 * the same conf. Good planning (no, pure luck ;)
853 if (last_walk->matched == htaccess_conf) {
854 now_merged = last_walk->merged;
860 /* We fell out of sync. This is our own copy of walked,
861 * so truncate the remaining matches and reset
864 cache->walked->nelts -= matches;
869 now_merged = ap_merge_per_dir_configs(r->pool,
874 now_merged = htaccess_conf;
877 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
878 last_walk->matched = htaccess_conf;
879 last_walk->merged = now_merged;
881 } while (0); /* Only one htaccess, not a real loop */
883 /* That temporary trailing slash was useful, now drop it.
886 r->filename[--filename_len] = '\0';
889 /* Time for all good things to come to an end?
891 if (!r->path_info || !*r->path_info) {
895 /* Now it's time for the next segment...
896 * We will assume the next element is an end node, and fix it up
897 * below as necessary...
900 seg_name = r->filename + filename_len;
901 delim = strchr(r->path_info + (*r->path_info == '/' ? 1 : 0), '/');
903 size_t path_info_len = delim - r->path_info;
905 memcpy(seg_name, r->path_info, path_info_len + 1);
906 filename_len += path_info_len;
907 r->path_info = delim;
911 size_t path_info_len = strlen(r->path_info);
912 memcpy(seg_name, r->path_info, path_info_len + 1);
913 filename_len += path_info_len;
914 r->path_info += path_info_len;
916 if (*seg_name == '/')
919 /* If nothing remained but a '/' string, we are finished
920 * XXX: NO WE ARE NOT!!! Now process this puppy!!! */
925 /* First optimization;
926 * If...we knew r->filename was a file, and
927 * if...we have strict (case-sensitive) filenames, or
928 * we know the canonical_filename matches to _this_ name, and
929 * if...we have allowed symlinks
930 * skip the lstat and dummy up an APR_DIR value for thisinfo.
932 if (r->finfo.filetype
933 #ifdef CASE_BLIND_FILESYSTEM
934 && (filename_len <= canonical_len)
936 && ((opts.opts & (OPT_SYM_OWNER | OPT_SYM_LINKS)) == OPT_SYM_LINKS))
939 thisinfo.filetype = APR_DIR;
944 /* We choose apr_stat with flag APR_FINFO_LINK here, rather that
945 * plain apr_stat, so that we capture this path object rather than
946 * its target. We will replace the info with our target's info
947 * below. We especially want the name of this 'link' object, not
948 * the name of its target, if we are fixing the filename
949 * case/resolving aliases.
951 rv = apr_stat(&thisinfo, r->filename,
952 APR_FINFO_MIN | APR_FINFO_NAME | APR_FINFO_LINK,
955 if (APR_STATUS_IS_ENOENT(rv)) {
956 /* Nothing? That could be nice. But our directory
959 thisinfo.filetype = APR_NOFILE;
962 else if (APR_STATUS_IS_EACCES(rv)) {
963 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
964 "access to %s denied", r->uri);
965 return r->status = HTTP_FORBIDDEN;
967 else if ((rv != APR_SUCCESS && rv != APR_INCOMPLETE)
968 || !(thisinfo.valid & APR_FINFO_TYPE)) {
969 /* If we hit ENOTDIR, we must have over-optimized, deny
970 * rather than assume not found.
972 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
973 "access to %s failed", r->uri);
974 return r->status = HTTP_FORBIDDEN;
977 /* Fix up the path now if we have a name, and they don't agree
979 if ((thisinfo.valid & APR_FINFO_NAME)
980 && strcmp(seg_name, thisinfo.name)) {
981 /* TODO: provide users an option that an internal/external
982 * redirect is required here? We need to walk the URI and
983 * filename in tandem to properly correlate these.
985 strcpy(seg_name, thisinfo.name);
986 filename_len = strlen(r->filename);
989 if (thisinfo.filetype == APR_LNK) {
990 /* Is this a possibly acceptable symlink?
992 if ((res = resolve_symlink(r->filename, &thisinfo,
993 opts.opts, r->pool)) != OK) {
994 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
995 "Symbolic link not allowed: %s",
997 return r->status = res;
1001 /* Ok, we are done with the link's info, test the real target
1003 if (thisinfo.filetype == APR_REG ||
1004 thisinfo.filetype == APR_NOFILE) {
1005 /* That was fun, nothing left for us here
1009 else if (thisinfo.filetype != APR_DIR) {
1010 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
1011 "Forbidden: %s doesn't point to "
1012 "a file or directory",
1014 return r->status = HTTP_FORBIDDEN;
1018 } while (thisinfo.filetype == APR_DIR);
1020 /* If we have _not_ optimized, this is the time to recover
1021 * the final stat result.
1023 if (!r->finfo.filetype || r->finfo.filetype == APR_LNK) {
1024 r->finfo = thisinfo;
1027 /* Now splice the saved path_info back onto any new path_info
1029 if (save_path_info) {
1030 if (r->path_info && *r->path_info) {
1031 r->path_info = ap_make_full_path(r->pool, r->path_info,
1035 r->path_info = save_path_info;
1040 * Now we'll deal with the regexes, note we pick up sec_idx
1041 * where we left off (we gave up after we hit entry_core->r)
1043 for (; sec_idx < num_sec; ++sec_idx) {
1045 core_dir_config *entry_core;
1046 entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
1048 if (!entry_core->r) {
1052 if (ap_regexec(entry_core->r, r->filename, 0, NULL, AP_REG_NOTEOL)) {
1056 /* If we haven't already continue'd above, we have a match.
1058 * Calculate our full-context core opts & override.
1060 core_opts_merge(sec_ent[sec_idx], &opts);
1062 /* If we merged this same section last time, reuse it
1065 if (last_walk->matched == sec_ent[sec_idx]) {
1066 now_merged = last_walk->merged;
1072 /* We fell out of sync. This is our own copy of walked,
1073 * so truncate the remaining matches and reset remaining.
1075 cache->walked->nelts -= matches;
1080 now_merged = ap_merge_per_dir_configs(r->pool,
1085 now_merged = sec_ent[sec_idx];
1088 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
1089 last_walk->matched = sec_ent[sec_idx];
1090 last_walk->merged = now_merged;
1093 /* Whoops - everything matched in sequence, but the original walk
1094 * found some additional matches. Truncate them.
1097 cache->walked->nelts -= matches;
1101 /* It seems this shouldn't be needed anymore. We translated the
1102 x symlink above into a real resource, and should have died up there.
1103 x Even if we keep this, it needs more thought (maybe an r->file_is_symlink)
1104 x perhaps it should actually happen in file_walk, so we catch more
1105 x obscure cases in autoindex subrequests, etc.
1107 x * Symlink permissions are determined by the parent. If the request is
1108 x * for a directory then applying the symlink test here would use the
1109 x * permissions of the directory as opposed to its parent. Consider a
1110 x * symlink pointing to a dir with a .htaccess disallowing symlinks. If
1111 x * you access /symlink (or /symlink/) you would get a 403 without this
1112 x * APR_DIR test. But if you accessed /symlink/index.html, for example,
1113 x * you would *not* get the 403.
1115 x if (r->finfo.filetype != APR_DIR
1116 x && (res = resolve_symlink(r->filename, r->info, ap_allow_options(r),
1118 x ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
1119 x "Symbolic link not allowed: %s", r->filename);
1124 /* Save future sub-requestors much angst in processing
1125 * this subrequest. If dir_walk couldn't canonicalize
1126 * the file path, nothing can.
1128 r->canonical_filename = r->filename;
1130 if (r->finfo.filetype == APR_DIR) {
1131 cache->cached = r->filename;
1134 cache->cached = ap_make_dirstr_parent(r->pool, r->filename);
1137 cache->dir_conf_tested = sec_ent;
1138 cache->dir_conf_merged = r->per_dir_config;
1140 /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
1141 * and note the end result to (potentially) skip this step next time.
1144 r->per_dir_config = ap_merge_per_dir_configs(r->pool,
1148 cache->per_dir_result = r->per_dir_config;
1154 AP_DECLARE(int) ap_location_walk(request_rec *r)
1156 ap_conf_vector_t *now_merged = NULL;
1157 core_server_config *sconf = ap_get_module_config(r->server->module_config,
1159 ap_conf_vector_t **sec_ent = (ap_conf_vector_t **)sconf->sec_url->elts;
1160 int num_sec = sconf->sec_url->nelts;
1161 walk_cache_t *cache;
1162 const char *entry_uri;
1164 /* No tricks here, there are no <Locations > to parse in this vhost.
1165 * We won't destroy the cache, just in case _this_ redirect is later
1166 * redirected again to a vhost with <Location > blocks to optimize.
1172 cache = prep_walk_cache(AP_NOTE_LOCATION_WALK, r);
1174 /* Location and LocationMatch differ on their behaviour w.r.t. multiple
1175 * slashes. Location matches multiple slashes with a single slash,
1176 * LocationMatch doesn't. An exception, for backwards brokenness is
1177 * absoluteURIs... in which case neither match multiple slashes.
1179 if (r->uri[0] != '/') {
1183 char *uri = apr_pstrdup(r->pool, r->uri);
1188 /* If we have an cache->cached location that matches r->uri,
1189 * and the vhost's list of locations hasn't changed, we can skip
1190 * rewalking the location_walk entries.
1193 && (cache->dir_conf_tested == sec_ent)
1194 && (strcmp(entry_uri, cache->cached) == 0)) {
1195 /* Well this looks really familiar! If our end-result (per_dir_result)
1196 * didn't change, we have absolutely nothing to do :)
1197 * Otherwise (as is the case with most dir_merged/file_merged requests)
1198 * we must merge our dir_conf_merged onto this new r->per_dir_config.
1200 if (r->per_dir_config == cache->per_dir_result) {
1204 if (r->per_dir_config == cache->dir_conf_merged) {
1205 r->per_dir_config = cache->per_dir_result;
1209 if (cache->walked->nelts) {
1210 now_merged = ((walk_walked_t*)cache->walked->elts)
1211 [cache->walked->nelts - 1].merged;
1215 /* We start now_merged from NULL since we want to build
1216 * a locations list that can be merged to any vhost.
1219 int matches = cache->walked->nelts;
1220 walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
1221 cache->cached = entry_uri;
1223 /* Go through the location entries, and check for matches.
1224 * We apply the directive sections in given order, we should
1225 * really try them with the most general first.
1227 for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) {
1229 core_dir_config *entry_core;
1230 entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
1232 /* ### const strlen can be optimized in location config parsing */
1233 len = strlen(entry_core->d);
1235 /* Test the regex, fnmatch or string as appropriate.
1236 * If it's a strcmp, and the <Location > pattern was
1237 * not slash terminated, then this uri must be slash
1238 * terminated (or at the end of the string) to match.
1241 ? ap_regexec(entry_core->r, r->uri, 0, NULL, 0)
1242 : (entry_core->d_is_fnmatch
1243 ? apr_fnmatch(entry_core->d, cache->cached, APR_FNM_PATHNAME)
1244 : (strncmp(entry_core->d, cache->cached, len)
1245 || (entry_core->d[len - 1] != '/'
1246 && cache->cached[len] != '/'
1247 && cache->cached[len] != '\0')))) {
1251 /* If we merged this same section last time, reuse it
1254 if (last_walk->matched == sec_ent[sec_idx]) {
1255 now_merged = last_walk->merged;
1261 /* We fell out of sync. This is our own copy of walked,
1262 * so truncate the remaining matches and reset remaining.
1264 cache->walked->nelts -= matches;
1269 now_merged = ap_merge_per_dir_configs(r->pool,
1274 now_merged = sec_ent[sec_idx];
1277 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
1278 last_walk->matched = sec_ent[sec_idx];
1279 last_walk->merged = now_merged;
1282 /* Whoops - everything matched in sequence, but the original walk
1283 * found some additional matches. Truncate them.
1286 cache->walked->nelts -= matches;
1290 cache->dir_conf_tested = sec_ent;
1291 cache->dir_conf_merged = r->per_dir_config;
1293 /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
1294 * and note the end result to (potentially) skip this step next time.
1297 r->per_dir_config = ap_merge_per_dir_configs(r->pool,
1301 cache->per_dir_result = r->per_dir_config;
1306 AP_DECLARE(int) ap_file_walk(request_rec *r)
1308 ap_conf_vector_t *now_merged = NULL;
1309 core_dir_config *dconf = ap_get_module_config(r->per_dir_config,
1311 ap_conf_vector_t **sec_ent = (ap_conf_vector_t **)dconf->sec_file->elts;
1312 int num_sec = dconf->sec_file->nelts;
1313 walk_cache_t *cache;
1314 const char *test_file;
1316 /* To allow broken modules to proceed, we allow missing filenames to pass.
1317 * We will catch it later if it's heading for the core handler.
1318 * directory_walk already posted an INFO note for module debugging.
1320 if (r->filename == NULL) {
1324 cache = prep_walk_cache(AP_NOTE_FILE_WALK, r);
1326 /* No tricks here, there are just no <Files > to parse in this context.
1327 * We won't destroy the cache, just in case _this_ redirect is later
1328 * redirected again to a context containing the same or similar <Files >.
1334 /* Get the basename .. and copy for the cache just
1335 * in case r->filename is munged by another module
1337 test_file = strrchr(r->filename, '/');
1338 if (test_file == NULL) {
1339 test_file = apr_pstrdup(r->pool, r->filename);
1342 test_file = apr_pstrdup(r->pool, ++test_file);
1345 /* If we have an cache->cached file name that matches test_file,
1346 * and the directory's list of file sections hasn't changed, we
1347 * can skip rewalking the file_walk entries.
1350 && (cache->dir_conf_tested == sec_ent)
1351 && (strcmp(test_file, cache->cached) == 0)) {
1352 /* Well this looks really familiar! If our end-result (per_dir_result)
1353 * didn't change, we have absolutely nothing to do :)
1354 * Otherwise (as is the case with most dir_merged requests)
1355 * we must merge our dir_conf_merged onto this new r->per_dir_config.
1357 if (r->per_dir_config == cache->per_dir_result) {
1361 if (r->per_dir_config == cache->dir_conf_merged) {
1362 r->per_dir_config = cache->per_dir_result;
1366 if (cache->walked->nelts) {
1367 now_merged = ((walk_walked_t*)cache->walked->elts)
1368 [cache->walked->nelts - 1].merged;
1372 /* We start now_merged from NULL since we want to build
1373 * a file section list that can be merged to any dir_walk.
1376 int matches = cache->walked->nelts;
1377 walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
1378 cache->cached = test_file;
1380 /* Go through the location entries, and check for matches.
1381 * We apply the directive sections in given order, we should
1382 * really try them with the most general first.
1384 for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) {
1386 core_dir_config *entry_core;
1387 entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
1390 ? ap_regexec(entry_core->r, cache->cached , 0, NULL, 0)
1391 : (entry_core->d_is_fnmatch
1392 ? apr_fnmatch(entry_core->d, cache->cached, APR_FNM_PATHNAME)
1393 : strcmp(entry_core->d, cache->cached))) {
1397 /* If we merged this same section last time, reuse it
1400 if (last_walk->matched == sec_ent[sec_idx]) {
1401 now_merged = last_walk->merged;
1407 /* We fell out of sync. This is our own copy of walked,
1408 * so truncate the remaining matches and reset remaining.
1410 cache->walked->nelts -= matches;
1415 now_merged = ap_merge_per_dir_configs(r->pool,
1420 now_merged = sec_ent[sec_idx];
1423 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
1424 last_walk->matched = sec_ent[sec_idx];
1425 last_walk->merged = now_merged;
1428 /* Whoops - everything matched in sequence, but the original walk
1429 * found some additional matches. Truncate them.
1432 cache->walked->nelts -= matches;
1436 cache->dir_conf_tested = sec_ent;
1437 cache->dir_conf_merged = r->per_dir_config;
1439 /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
1440 * and note the end result to (potentially) skip this step next time.
1443 r->per_dir_config = ap_merge_per_dir_configs(r->pool,
1447 cache->per_dir_result = r->per_dir_config;
1452 /*****************************************************************
1454 * The sub_request mechanism.
1456 * Fns to look up a relative URI from, e.g., a map file or SSI document.
1457 * These do all access checks, etc., but don't actually run the transaction
1458 * ... use run_sub_req below for that. Also, be sure to use destroy_sub_req
1459 * as appropriate if you're likely to be creating more than a few of these.
1460 * (An early Apache version didn't destroy the sub_reqs used in directory
1461 * indexing. The result, when indexing a directory with 800-odd files in
1462 * it, was massively excessive storage allocation).
1464 * Note more manipulation of protocol-specific vars in the request
1468 static request_rec *make_sub_request(const request_rec *r,
1469 ap_filter_t *next_filter)
1474 apr_pool_create(&rrp, r->pool);
1475 apr_pool_tag(rrp, "subrequest");
1476 rnew = apr_pcalloc(rrp, sizeof(request_rec));
1479 rnew->hostname = r->hostname;
1480 rnew->request_time = r->request_time;
1481 rnew->connection = r->connection;
1482 rnew->server = r->server;
1484 rnew->request_config = ap_create_request_config(rnew->pool);
1486 /* Start a clean config from this subrequest's vhost. Optimization in
1487 * Location/File/Dir walks from the parent request assure that if the
1488 * config blocks of the subrequest match the parent request, no merges
1489 * will actually occur (and generally a minimal number of merges are
1490 * required, even if the parent and subrequest aren't quite identical.)
1492 rnew->per_dir_config = r->server->lookup_defaults;
1494 rnew->htaccess = r->htaccess;
1495 rnew->allowed_methods = ap_make_method_list(rnew->pool, 2);
1497 /* make a copy of the allowed-methods list */
1498 ap_copy_method_list(rnew->allowed_methods, r->allowed_methods);
1500 /* start with the same set of output filters */
1502 /* while there are no input filters for a subrequest, we will
1503 * try to insert some, so if we don't have valid data, the code
1506 rnew->input_filters = r->input_filters;
1507 rnew->proto_input_filters = r->proto_input_filters;
1508 rnew->output_filters = next_filter;
1509 rnew->proto_output_filters = r->proto_output_filters;
1510 ap_add_output_filter_handle(ap_subreq_core_filter_handle,
1511 NULL, rnew, rnew->connection);
1514 /* If NULL - we are expecting to be internal_fast_redirect'ed
1515 * to this subrequest - or this request will never be invoked.
1516 * Ignore the original request filter stack entirely, and
1517 * drill the input and output stacks back to the connection.
1519 rnew->proto_input_filters = r->proto_input_filters;
1520 rnew->proto_output_filters = r->proto_output_filters;
1522 rnew->input_filters = r->proto_input_filters;
1523 rnew->output_filters = r->proto_output_filters;
1526 /* no input filters for a subrequest */
1528 ap_set_sub_req_protocol(rnew, r);
1530 /* We have to run this after we fill in sub req vars,
1531 * or the r->main pointer won't be setup
1533 ap_run_create_request(rnew);
1538 AP_CORE_DECLARE_NONSTD(apr_status_t) ap_sub_req_output_filter(ap_filter_t *f,
1539 apr_bucket_brigade *bb)
1541 apr_bucket *e = APR_BRIGADE_LAST(bb);
1543 if (APR_BUCKET_IS_EOS(e)) {
1544 apr_bucket_delete(e);
1547 if (!APR_BRIGADE_EMPTY(bb)) {
1548 return ap_pass_brigade(f->next, bb);
1555 AP_DECLARE(int) ap_some_auth_required(request_rec *r)
1557 /* Is there a require line configured for the type of *this* req? */
1559 const apr_array_header_t *reqs_arr = ap_requires(r);
1567 reqs = (require_line *) reqs_arr->elts;
1569 for (i = 0; i < reqs_arr->nelts; ++i) {
1570 if (reqs[i].method_mask & (AP_METHOD_BIT << r->method_number)) {
1579 AP_DECLARE(request_rec *) ap_sub_req_method_uri(const char *method,
1580 const char *new_uri,
1581 const request_rec *r,
1582 ap_filter_t *next_filter)
1588 rnew = make_sub_request(r, next_filter);
1590 /* would be nicer to pass "method" to ap_set_sub_req_protocol */
1591 rnew->method = method;
1592 rnew->method_number = ap_method_number_of(method);
1594 if (new_uri[0] == '/') {
1595 ap_parse_uri(rnew, new_uri);
1598 udir = ap_make_dirstr_parent(rnew->pool, r->uri);
1599 udir = ap_escape_uri(rnew->pool, udir); /* re-escape it */
1600 ap_parse_uri(rnew, ap_make_full_path(rnew->pool, udir, new_uri));
1603 /* We cannot return NULL without violating the API. So just turn this
1604 * subrequest into a 500 to indicate the failure. */
1605 if (ap_is_recursion_limit_exceeded(r)) {
1606 rnew->status = HTTP_INTERNAL_SERVER_ERROR;
1611 * If the content can be served by the quick_handler, we can
1612 * safely bypass request_internal processing.
1614 res = ap_run_quick_handler(rnew, 1);
1617 if ((res = ap_process_request_internal(rnew))) {
1625 AP_DECLARE(request_rec *) ap_sub_req_lookup_uri(const char *new_uri,
1626 const request_rec *r,
1627 ap_filter_t *next_filter)
1629 return ap_sub_req_method_uri("GET", new_uri, r, next_filter);
1632 AP_DECLARE(request_rec *) ap_sub_req_lookup_dirent(const apr_finfo_t *dirent,
1633 const request_rec *r,
1635 ap_filter_t *next_filter)
1642 rnew = make_sub_request(r, next_filter);
1644 /* Special case: we are looking at a relative lookup in the same directory.
1645 * This is 100% safe, since dirent->name just came from the filesystem.
1647 if (r->path_info && *r->path_info) {
1648 /* strip path_info off the end of the uri to keep it in sync
1649 * with r->filename, which has already been stripped by directory_walk,
1650 * merge the dirent->name, and then, if the caller wants us to remerge
1651 * the original path info, do so. Note we never fix the path_info back
1652 * to r->filename, since dir_walk would do so (but we don't expect it
1653 * to happen in the usual cases)
1655 udir = apr_pstrdup(rnew->pool, r->uri);
1656 udir[ap_find_path_info(udir, r->path_info)] = '\0';
1657 udir = ap_make_dirstr_parent(rnew->pool, udir);
1659 rnew->uri = ap_make_full_path(rnew->pool, udir, dirent->name);
1660 if (subtype == AP_SUBREQ_MERGE_ARGS) {
1661 rnew->uri = ap_make_full_path(rnew->pool, rnew->uri, r->path_info + 1);
1662 rnew->path_info = apr_pstrdup(rnew->pool, r->path_info);
1664 rnew->uri = ap_escape_uri(rnew->pool, rnew->uri);
1667 udir = ap_make_dirstr_parent(rnew->pool, r->uri);
1668 rnew->uri = ap_escape_uri(rnew->pool, ap_make_full_path(rnew->pool,
1673 fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
1674 rnew->filename = ap_make_full_path(rnew->pool, fdir, dirent->name);
1675 if (r->canonical_filename == r->filename) {
1676 rnew->canonical_filename = rnew->filename;
1679 /* XXX This is now less relevant; we will do a full location walk
1680 * these days for this case. Preserve the apr_stat results, and
1681 * perhaps we also tag that symlinks were tested and/or found for
1684 rnew->per_dir_config = r->server->lookup_defaults;
1686 if ((dirent->valid & APR_FINFO_MIN) != APR_FINFO_MIN) {
1688 * apr_dir_read isn't very complete on this platform, so
1689 * we need another apr_stat (with or without APR_FINFO_LINK
1690 * depending on whether we allow all symlinks here.) If this
1691 * is an APR_LNK that resolves to an APR_DIR, then we will rerun
1692 * everything anyways... this should be safe.
1695 if (ap_allow_options(rnew) & OPT_SYM_LINKS) {
1696 if (((rv = apr_stat(&rnew->finfo, rnew->filename,
1697 APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
1698 && (rv != APR_INCOMPLETE)) {
1699 rnew->finfo.filetype = 0;
1703 if (((rv = apr_stat(&rnew->finfo, rnew->filename,
1704 APR_FINFO_LINK | APR_FINFO_MIN,
1705 rnew->pool)) != APR_SUCCESS)
1706 && (rv != APR_INCOMPLETE)) {
1707 rnew->finfo.filetype = 0;
1712 memcpy(&rnew->finfo, dirent, sizeof(apr_finfo_t));
1715 if (rnew->finfo.filetype == APR_LNK) {
1717 * Resolve this symlink. We should tie this back to dir_walk's cache
1719 if ((res = resolve_symlink(rnew->filename, &rnew->finfo,
1720 ap_allow_options(rnew), rnew->pool))
1727 if (rnew->finfo.filetype == APR_DIR) {
1728 /* ap_make_full_path overallocated the buffers
1729 * by one character to help us out here.
1731 strcpy(rnew->filename + strlen(rnew->filename), "/");
1732 if (!rnew->path_info || !*rnew->path_info) {
1733 strcpy(rnew->uri + strlen(rnew->uri ), "/");
1737 /* fill in parsed_uri values
1739 if (r->args && *r->args && (subtype == AP_SUBREQ_MERGE_ARGS)) {
1740 ap_parse_uri(rnew, apr_pstrcat(r->pool, rnew->uri, "?",
1744 ap_parse_uri(rnew, rnew->uri);
1747 /* We cannot return NULL without violating the API. So just turn this
1748 * subrequest into a 500. */
1749 if (ap_is_recursion_limit_exceeded(r)) {
1750 rnew->status = HTTP_INTERNAL_SERVER_ERROR;
1754 if ((res = ap_process_request_internal(rnew))) {
1761 AP_DECLARE(request_rec *) ap_sub_req_lookup_file(const char *new_file,
1762 const request_rec *r,
1763 ap_filter_t *next_filter)
1770 rnew = make_sub_request(r, next_filter);
1772 fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
1773 fdirlen = strlen(fdir);
1775 /* Translate r->filename, if it was canonical, it stays canonical
1777 if (r->canonical_filename == r->filename) {
1778 rnew->canonical_filename = (char*)(1);
1781 if (apr_filepath_merge(&rnew->filename, fdir, new_file,
1782 APR_FILEPATH_TRUENAME, rnew->pool) != APR_SUCCESS) {
1783 rnew->status = HTTP_FORBIDDEN;
1787 if (rnew->canonical_filename) {
1788 rnew->canonical_filename = rnew->filename;
1792 * Check for a special case... if there are no '/' characters in new_file
1793 * at all, and the path was the same, then we are looking at a relative
1794 * lookup in the same directory. Fixup the URI to match.
1797 if (strncmp(rnew->filename, fdir, fdirlen) == 0
1798 && rnew->filename[fdirlen]
1799 && ap_strchr_c(rnew->filename + fdirlen, '/') == NULL) {
1801 if (ap_allow_options(rnew) & OPT_SYM_LINKS) {
1802 if (((rv = apr_stat(&rnew->finfo, rnew->filename,
1803 APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
1804 && (rv != APR_INCOMPLETE)) {
1805 rnew->finfo.filetype = 0;
1809 if (((rv = apr_stat(&rnew->finfo, rnew->filename,
1810 APR_FINFO_LINK | APR_FINFO_MIN,
1811 rnew->pool)) != APR_SUCCESS)
1812 && (rv != APR_INCOMPLETE)) {
1813 rnew->finfo.filetype = 0;
1817 if (r->uri && *r->uri) {
1818 char *udir = ap_make_dirstr_parent(rnew->pool, r->uri);
1819 rnew->uri = ap_make_full_path(rnew->pool, udir,
1820 rnew->filename + fdirlen);
1821 ap_parse_uri(rnew, rnew->uri); /* fill in parsed_uri values */
1824 ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */
1825 rnew->uri = apr_pstrdup(rnew->pool, "");
1829 /* XXX: @@@: What should be done with the parsed_uri values?
1830 * We would be better off stripping down to the 'common' elements
1831 * of the path, then reassembling the URI as best as we can.
1833 ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */
1835 * XXX: this should be set properly like it is in the same-dir case
1836 * but it's actually sometimes to impossible to do it... because the
1837 * file may not have a uri associated with it -djg
1839 rnew->uri = apr_pstrdup(rnew->pool, "");
1842 /* We cannot return NULL without violating the API. So just turn this
1843 * subrequest into a 500. */
1844 if (ap_is_recursion_limit_exceeded(r)) {
1845 rnew->status = HTTP_INTERNAL_SERVER_ERROR;
1849 if ((res = ap_process_request_internal(rnew))) {
1856 AP_DECLARE(int) ap_run_sub_req(request_rec *r)
1858 int retval = DECLINED;
1859 /* Run the quick handler if the subrequest is not a dirent or file
1862 if (!(r->filename && r->finfo.filetype)) {
1863 retval = ap_run_quick_handler(r, 0);
1866 retval = ap_invoke_handler(r);
1867 if (retval == DONE) {
1871 ap_finalize_sub_req_protocol(r);
1875 AP_DECLARE(void) ap_destroy_sub_req(request_rec *r)
1877 /* Reclaim the space */
1878 apr_pool_destroy(r->pool);
1882 * Function to set the r->mtime field to the specified value if it's later
1883 * than what's already there.
1885 AP_DECLARE(void) ap_update_mtime(request_rec *r, apr_time_t dependency_mtime)
1887 if (r->mtime < dependency_mtime) {
1888 r->mtime = dependency_mtime;
1893 * Is it the initial main request, which we only get *once* per HTTP request?
1895 AP_DECLARE(int) ap_is_initial_req(request_rec *r)
1897 return (r->main == NULL) /* otherwise, this is a sub-request */
1898 && (r->prev == NULL); /* otherwise, this is an internal redirect */