1 /* Copyright 2001-2004 The Apache Software Foundation
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
17 * http_request.c: functions to get and process requests
21 * Thoroughly revamped by rst for Apache. NB this file reads
22 * best from the bottom up.
26 #include "apr_strings.h"
27 #include "apr_file_io.h"
28 #include "apr_fnmatch.h"
30 #define APR_WANT_STRFUNC
34 #include "ap_config.h"
36 #include "http_config.h"
37 #include "http_request.h"
38 #include "http_core.h"
39 #include "http_protocol.h"
41 #include "http_main.h"
42 #include "util_filter.h"
43 #include "util_charset.h"
44 #include "util_script.h"
53 APR_HOOK_LINK(translate_name)
54 APR_HOOK_LINK(map_to_storage)
55 APR_HOOK_LINK(check_user_id)
57 APR_HOOK_LINK(type_checker)
58 APR_HOOK_LINK(access_checker)
59 APR_HOOK_LINK(auth_checker)
60 APR_HOOK_LINK(insert_filter)
61 APR_HOOK_LINK(create_request)
64 AP_IMPLEMENT_HOOK_RUN_FIRST(int,translate_name,
65 (request_rec *r), (r), DECLINED)
66 AP_IMPLEMENT_HOOK_RUN_FIRST(int,map_to_storage,
67 (request_rec *r), (r), DECLINED)
68 AP_IMPLEMENT_HOOK_RUN_FIRST(int,check_user_id,
69 (request_rec *r), (r), DECLINED)
70 AP_IMPLEMENT_HOOK_RUN_ALL(int,fixups,
71 (request_rec *r), (r), OK, DECLINED)
72 AP_IMPLEMENT_HOOK_RUN_FIRST(int,type_checker,
73 (request_rec *r), (r), DECLINED)
74 AP_IMPLEMENT_HOOK_RUN_ALL(int,access_checker,
75 (request_rec *r), (r), OK, DECLINED)
76 AP_IMPLEMENT_HOOK_RUN_FIRST(int,auth_checker,
77 (request_rec *r), (r), DECLINED)
78 AP_IMPLEMENT_HOOK_VOID(insert_filter, (request_rec *r), (r))
79 AP_IMPLEMENT_HOOK_RUN_ALL(int, create_request,
80 (request_rec *r), (r), OK, DECLINED)
83 static int decl_die(int status, char *phase, request_rec *r)
85 if (status == DECLINED) {
86 ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r,
87 "configuration error: couldn't %s: %s", phase, r->uri);
88 return HTTP_INTERNAL_SERVER_ERROR;
95 /* This is the master logic for processing requests. Do NOT duplicate
96 * this logic elsewhere, or the security model will be broken by future
97 * API changes. Each phase must be individually optimized to pick up
98 * redundant/duplicate calls by subrequests, and redirects.
100 AP_DECLARE(int) ap_process_request_internal(request_rec *r)
102 int file_req = (r->main && r->filename);
105 /* Ignore embedded %2F's in path for proxy requests */
106 if (!r->proxyreq && r->parsed_uri.path) {
108 d = ap_get_module_config(r->per_dir_config, &core_module);
109 if (d->allow_encoded_slashes) {
110 access_status = ap_unescape_url_keep2f(r->parsed_uri.path);
113 access_status = ap_unescape_url(r->parsed_uri.path);
116 if (access_status == HTTP_NOT_FOUND) {
117 if (! d->allow_encoded_slashes) {
118 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
119 "found %%2f (encoded '/') in URI "
120 "(decoded='%s'), returning 404",
124 return access_status;
128 ap_getparents(r->uri); /* OK --- shrinking transformations... */
130 /* All file subrequests are a huge pain... they cannot bubble through the
131 * next several steps. Only file subrequests are allowed an empty uri,
132 * otherwise let translate_name kill the request.
135 if ((access_status = ap_location_walk(r))) {
136 return access_status;
139 if ((access_status = ap_run_translate_name(r))) {
140 return decl_die(access_status, "translate", r);
144 /* Reset to the server default config prior to running map_to_storage
146 r->per_dir_config = r->server->lookup_defaults;
148 if ((access_status = ap_run_map_to_storage(r))) {
149 /* This request wasn't in storage (e.g. TRACE) */
150 return access_status;
153 /* Excluding file-specific requests with no 'true' URI...
156 /* Rerun the location walk, which overrides any map_to_storage config.
158 if ((access_status = ap_location_walk(r))) {
159 return access_status;
163 /* Only on the main request! */
164 if (r->main == NULL) {
165 if ((access_status = ap_run_header_parser(r))) {
166 return access_status;
170 /* Skip authn/authz if the parent or prior request passed the authn/authz,
171 * and that configuration didn't change (this requires optimized _walk()
172 * functions in map_to_storage that use the same merge results given
173 * identical input.) If the config changes, we must re-auth.
175 if (r->main && (r->main->per_dir_config == r->per_dir_config)) {
176 r->user = r->main->user;
177 r->ap_auth_type = r->main->ap_auth_type;
179 else if (r->prev && (r->prev->per_dir_config == r->per_dir_config)) {
180 r->user = r->prev->user;
181 r->ap_auth_type = r->prev->ap_auth_type;
184 switch (ap_satisfies(r)) {
187 if ((access_status = ap_run_access_checker(r)) != 0) {
188 return decl_die(access_status, "check access", r);
191 if (ap_some_auth_required(r)) {
192 if (((access_status = ap_run_check_user_id(r)) != 0)
193 || !ap_auth_type(r)) {
194 return decl_die(access_status, ap_auth_type(r)
195 ? "check user. No user file?"
196 : "perform authentication. AuthType not set!",
200 if (((access_status = ap_run_auth_checker(r)) != 0)
201 || !ap_auth_type(r)) {
202 return decl_die(access_status, ap_auth_type(r)
203 ? "check access. No groups file?"
204 : "perform authentication. AuthType not set!",
211 if (((access_status = ap_run_access_checker(r)) != 0)) {
212 if (!ap_some_auth_required(r)) {
213 return decl_die(access_status, "check access", r);
216 if (((access_status = ap_run_check_user_id(r)) != 0)
217 || !ap_auth_type(r)) {
218 return decl_die(access_status, ap_auth_type(r)
219 ? "check user. No user file?"
220 : "perform authentication. AuthType not set!",
224 if (((access_status = ap_run_auth_checker(r)) != 0)
225 || !ap_auth_type(r)) {
226 return decl_die(access_status, ap_auth_type(r)
227 ? "check access. No groups file?"
228 : "perform authentication. AuthType not set!",
235 /* XXX Must make certain the ap_run_type_checker short circuits mime
236 * in mod-proxy for r->proxyreq && r->parsed_uri.scheme
237 * && !strcmp(r->parsed_uri.scheme, "http")
239 if ((access_status = ap_run_type_checker(r)) != 0) {
240 return decl_die(access_status, "find types", r);
243 if ((access_status = ap_run_fixups(r)) != 0) {
244 return access_status;
251 /* Useful caching structures to repeat _walk/merge sequences as required
252 * when a subrequest or redirect reuses substantially the same config.
254 * Directive order in the httpd.conf file and its Includes significantly
255 * impact this optimization. Grouping common blocks at the front of the
256 * config that are less likely to change between a request and
257 * its subrequests, or between a request and its redirects reduced
258 * the work of these functions significantly.
261 typedef struct walk_walked_t {
262 ap_conf_vector_t *matched; /* A dir_conf sections we matched */
263 ap_conf_vector_t *merged; /* The dir_conf merged result */
266 typedef struct walk_cache_t {
267 const char *cached; /* The identifier we matched */
268 ap_conf_vector_t **dir_conf_tested; /* The sections we matched against */
269 ap_conf_vector_t *dir_conf_merged; /* Base per_dir_config */
270 ap_conf_vector_t *per_dir_result; /* per_dir_config += walked result */
271 apr_array_header_t *walked; /* The list of walk_walked_t results */
274 static walk_cache_t *prep_walk_cache(apr_size_t t, request_rec *r)
279 /* Find the most relevant, recent entry to work from. That would be
280 * this request (on the second call), or the parent request of a
281 * subrequest, or the prior request of an internal redirect. Provide
282 * this _walk()er with a copy it is allowed to munge. If there is no
283 * parent or prior cached request, then create a new walk cache.
285 note = ap_get_request_note(r, t);
290 if (!(cache = *note)) {
294 && ((inherit_note = ap_get_request_note(r->main, t)))
297 && ((inherit_note = ap_get_request_note(r->prev, t)))
299 cache = apr_pmemdup(r->pool, *inherit_note,
301 cache->walked = apr_array_copy(r->pool, cache->walked);
304 cache = apr_pcalloc(r->pool, sizeof(*cache));
305 cache->walked = apr_array_make(r->pool, 4, sizeof(walk_walked_t));
313 /*****************************************************************
315 * Getting and checking directory configuration. Also checks the
316 * FollowSymlinks and FollowSymOwner stuff, since this is really the
317 * only place that can happen (barring a new mid_dir_walk callout).
319 * We can't do it as an access_checker module function which gets
320 * called with the final per_dir_config, since we could have a directory
321 * with FollowSymLinks disabled, which contains a symlink to another
322 * with a .htaccess file which turns FollowSymLinks back on --- and
323 * access in such a case must be denied. So, whatever it is that
324 * checks FollowSymLinks needs to know the state of the options as
325 * they change, all the way down.
330 * resolve_symlink must _always_ be called on an APR_LNK file type!
331 * It will resolve the actual target file type, modification date, etc,
332 * and provide any processing required for symlink evaluation.
333 * Path must already be cleaned, no trailing slash, no multi-slashes,
334 * and don't call this on the root!
336 * Simply, the number of times we deref a symlink are minimal compared
337 * to the number of times we had an extra lstat() since we 'weren't sure'.
339 * To optimize, we stat() anything when given (opts & OPT_SYM_LINKS), otherwise
340 * we start off with an lstat(). Every lstat() must be dereferenced in case
341 * it points at a 'nasty' - we must always rerun check_safe_file (or similar.)
343 static int resolve_symlink(char *d, apr_finfo_t *lfi, int opts, apr_pool_t *p)
347 const char *savename;
349 if (!(opts & (OPT_SYM_OWNER | OPT_SYM_LINKS))) {
350 return HTTP_FORBIDDEN;
353 /* Save the name from the valid bits. */
354 savename = (lfi->valid & APR_FINFO_NAME) ? lfi->name : NULL;
356 if (opts & OPT_SYM_LINKS) {
357 if ((res = apr_stat(&fi, d, lfi->valid & ~(APR_FINFO_NAME
358 | APR_FINFO_LINK), p))
360 return HTTP_FORBIDDEN;
363 /* Give back the target */
364 memcpy(lfi, &fi, sizeof(fi));
366 lfi->name = savename;
367 lfi->valid |= APR_FINFO_NAME;
373 /* OPT_SYM_OWNER only works if we can get the owner of
374 * both the file and symlink. First fill in a missing
375 * owner of the symlink, then get the info of the target.
377 if (!(lfi->valid & APR_FINFO_OWNER)) {
378 if ((res = apr_stat(&fi, d,
379 lfi->valid | APR_FINFO_LINK | APR_FINFO_OWNER, p))
381 return HTTP_FORBIDDEN;
385 if ((res = apr_stat(&fi, d, lfi->valid & ~(APR_FINFO_NAME), p))
387 return HTTP_FORBIDDEN;
390 if (apr_uid_compare(fi.user, lfi->user) != APR_SUCCESS) {
391 return HTTP_FORBIDDEN;
394 /* Give back the target */
395 memcpy(lfi, &fi, sizeof(fi));
397 lfi->name = savename;
398 lfi->valid |= APR_FINFO_NAME;
406 * As we walk the directory configuration, the merged config won't
407 * be 'rooted' to a specific vhost until the very end of the merge.
409 * We need a very fast mini-merge to a real, vhost-rooted merge
410 * of core.opts and core.override, the only options tested within
411 * directory_walk itself.
413 * See core.c::merge_core_dir_configs() for explanation.
416 typedef struct core_opts_t {
417 allow_options_t opts;
419 allow_options_t remove;
420 overrides_t override;
421 overrides_t override_opts;
424 static void core_opts_merge(const ap_conf_vector_t *sec, core_opts_t *opts)
426 core_dir_config *this_dir = ap_get_module_config(sec, &core_module);
432 if (this_dir->opts & OPT_UNSET) {
433 opts->add = (opts->add & ~this_dir->opts_remove)
434 | this_dir->opts_add;
435 opts->remove = (opts->remove & ~this_dir->opts_add)
436 | this_dir->opts_remove;
437 opts->opts = (opts->opts & ~opts->remove) | opts->add;
440 opts->opts = this_dir->opts;
441 opts->add = this_dir->opts_add;
442 opts->remove = this_dir->opts_remove;
445 if (!(this_dir->override & OR_UNSET)) {
446 opts->override = this_dir->override;
448 if (!(this_dir->override_opts & OR_UNSET)) {
449 opts->override_opts = this_dir->override_opts;
454 /*****************************************************************
456 * Getting and checking directory configuration. Also checks the
457 * FollowSymlinks and FollowSymOwner stuff, since this is really the
458 * only place that can happen (barring a new mid_dir_walk callout).
460 * We can't do it as an access_checker module function which gets
461 * called with the final per_dir_config, since we could have a directory
462 * with FollowSymLinks disabled, which contains a symlink to another
463 * with a .htaccess file which turns FollowSymLinks back on --- and
464 * access in such a case must be denied. So, whatever it is that
465 * checks FollowSymLinks needs to know the state of the options as
466 * they change, all the way down.
469 AP_DECLARE(int) ap_directory_walk(request_rec *r)
471 ap_conf_vector_t *now_merged = NULL;
472 core_server_config *sconf = ap_get_module_config(r->server->module_config,
474 ap_conf_vector_t **sec_ent = (ap_conf_vector_t **) sconf->sec_dir->elts;
475 int num_sec = sconf->sec_dir->nelts;
480 /* XXX: Better (faster) tests needed!!!
482 * "OK" as a response to a real problem is not _OK_, but to allow broken
483 * modules to proceed, we will permit the not-a-path filename to pass the
484 * following two tests. This behavior may be revoked in future versions
485 * of Apache. We still must catch it later if it's heading for the core
486 * handler. Leave INFO notes here for module debugging.
488 if (r->filename == NULL) {
489 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
490 "Module bug? Request filename is missing for URI %s",
495 /* Canonicalize the file path without resolving filename case or aliases
496 * so we can begin by checking the cache for a recent directory walk.
497 * This call will ensure we have an absolute path in the same pass.
499 if ((rv = apr_filepath_merge(&entry_dir, NULL, r->filename,
500 APR_FILEPATH_NOTRELATIVE, r->pool))
502 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
503 "Module bug? Request filename path %s is invalid or "
504 "or not absolute for uri %s",
505 r->filename, r->uri);
509 /* XXX Notice that this forces path_info to be canonical. That might
510 * not be desired by all apps. However, some of those same apps likely
511 * have significant security holes.
513 r->filename = entry_dir;
515 cache = prep_walk_cache(AP_NOTE_DIRECTORY_WALK, r);
517 /* If this is not a dirent subrequest with a preconstructed
518 * r->finfo value, then we can simply stat the filename to
519 * save burning mega-cycles with unneeded stats - if this is
520 * an exact file match. We don't care about failure... we
521 * will stat by component failing this meager attempt.
523 * It would be nice to distinguish APR_ENOENT from other
524 * types of failure, such as APR_ENOTDIR. We can do something
525 * with APR_ENOENT, knowing that the path is good.
527 if (!r->finfo.filetype || r->finfo.filetype == APR_LNK) {
528 rv = apr_stat(&r->finfo, r->filename, APR_FINFO_MIN, r->pool);
530 /* some OSs will return APR_SUCCESS/APR_REG if we stat
531 * a regular file but we have '/' at the end of the name;
533 * other OSs will return APR_ENOTDIR for that situation;
535 * handle it the same everywhere by simulating a failure
536 * if it looks like a directory but really isn't
538 * Also reset if the stat failed, just for safety.
540 if ((rv != APR_SUCCESS) ||
541 (r->finfo.filetype &&
542 (r->finfo.filetype != APR_DIR) &&
543 (r->filename[strlen(r->filename) - 1] == '/'))) {
544 r->finfo.filetype = 0; /* forget what we learned */
548 if (r->finfo.filetype == APR_REG) {
549 entry_dir = ap_make_dirstr_parent(r->pool, entry_dir);
551 else if (r->filename[strlen(r->filename) - 1] != '/') {
552 entry_dir = apr_pstrcat(r->pool, r->filename, "/", NULL);
555 /* If we have a file already matches the path of r->filename,
556 * and the vhost's list of directory sections hasn't changed,
557 * we can skip rewalking the directory_walk entries.
560 && ((r->finfo.filetype == APR_REG)
561 || ((r->finfo.filetype == APR_DIR)
562 && (!r->path_info || !*r->path_info)))
563 && (cache->dir_conf_tested == sec_ent)
564 && (strcmp(entry_dir, cache->cached) == 0)) {
565 /* Well this looks really familiar! If our end-result (per_dir_result)
566 * didn't change, we have absolutely nothing to do :)
567 * Otherwise (as is the case with most dir_merged/file_merged requests)
568 * we must merge our dir_conf_merged onto this new r->per_dir_config.
570 if (r->per_dir_config == cache->per_dir_result) {
574 if (r->per_dir_config == cache->dir_conf_merged) {
575 r->per_dir_config = cache->per_dir_result;
579 if (cache->walked->nelts) {
580 now_merged = ((walk_walked_t*)cache->walked->elts)
581 [cache->walked->nelts - 1].merged;
585 /* We start now_merged from NULL since we want to build
586 * a locations list that can be merged to any vhost.
589 int matches = cache->walked->nelts;
590 walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
591 core_dir_config *this_dir;
593 apr_finfo_t thisinfo;
594 char *save_path_info;
597 unsigned int seg, startseg;
599 /* Invariant: from the first time filename_len is set until
600 * it goes out of scope, filename_len==strlen(r->filename)
602 apr_size_t filename_len;
603 #ifdef CASE_BLIND_FILESYSTEM
604 apr_size_t canonical_len;
608 * We must play our own mini-merge game here, for the few
609 * running dir_config values we care about within dir_walk.
610 * We didn't start the merge from r->per_dir_config, so we
611 * accumulate opts and override as we merge, from the globals.
613 this_dir = ap_get_module_config(r->per_dir_config, &core_module);
614 opts.opts = this_dir->opts;
615 opts.add = this_dir->opts_add;
616 opts.remove = this_dir->opts_remove;
617 opts.override = this_dir->override;
619 /* Set aside path_info to merge back onto path_info later.
620 * If r->filename is a directory, we must remerge the path_info,
621 * before we continue! [Directories cannot, by defintion, have
622 * path info. Either the next segment is not-found, or a file.]
624 * r->path_info tracks the unconsumed source path.
625 * r->filename tracks the path as we process it
627 if ((r->finfo.filetype == APR_DIR) && r->path_info && *r->path_info)
629 if ((rv = apr_filepath_merge(&r->path_info, r->filename,
631 APR_FILEPATH_NOTABOVEROOT, r->pool))
633 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
634 "dir_walk error, path_info %s is not relative "
635 "to the filename path %s for uri %s",
636 r->path_info, r->filename, r->uri);
637 return HTTP_INTERNAL_SERVER_ERROR;
640 save_path_info = NULL;
643 save_path_info = r->path_info;
644 r->path_info = r->filename;
647 #ifdef CASE_BLIND_FILESYSTEM
650 while (r->canonical_filename && r->canonical_filename[canonical_len]
651 && (r->canonical_filename[canonical_len]
652 == r->path_info[canonical_len])) {
657 && ((r->canonical_filename[canonical_len - 1] != '/'
658 && r->canonical_filename[canonical_len - 1])
659 || (r->path_info[canonical_len - 1] != '/'
660 && r->path_info[canonical_len - 1]))) {
665 * Now build r->filename component by component, starting
666 * with the root (on Unix, simply "/"). We will make a huge
667 * assumption here for efficiency, that any canonical path
668 * already given included a canonical root.
670 rv = apr_filepath_root((const char **)&r->filename,
671 (const char **)&r->path_info,
672 canonical_len ? 0 : APR_FILEPATH_TRUENAME,
674 filename_len = strlen(r->filename);
677 * Bad assumption above? If the root's length is longer
678 * than the canonical length, then it cannot be trusted as
679 * a truename. So try again, this time more seriously.
681 if ((rv == APR_SUCCESS) && canonical_len
682 && (filename_len > canonical_len)) {
683 rv = apr_filepath_root((const char **)&r->filename,
684 (const char **)&r->path_info,
685 APR_FILEPATH_TRUENAME, r->pool);
686 filename_len = strlen(r->filename);
690 #else /* ndef CASE_BLIND_FILESYSTEM, really this simple for Unix today; */
692 rv = apr_filepath_root((const char **)&r->filename,
693 (const char **)&r->path_info,
695 filename_len = strlen(r->filename);
699 if (rv != APR_SUCCESS) {
700 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
701 "dir_walk error, could not determine the root "
702 "path of filename %s%s for uri %s",
703 r->filename, r->path_info, r->uri);
704 return HTTP_INTERNAL_SERVER_ERROR;
707 /* Working space for terminating null and an extra / is required.
709 buflen = filename_len + strlen(r->path_info) + 2;
710 buf = apr_palloc(r->pool, buflen);
711 memcpy(buf, r->filename, filename_len + 1);
713 thisinfo.valid = APR_FINFO_TYPE;
714 thisinfo.filetype = APR_DIR; /* It's the root, of course it's a dir */
717 * seg keeps track of which segment we've copied.
718 * sec_idx keeps track of which section we're on, since sections are
719 * ordered by number of segments. See core_reorder_directories
720 * startseg tells us how many segments describe the root path
721 * e.g. the complete path "//host/foo/" to a UNC share (4)
723 startseg = seg = ap_count_dirs(r->filename);
727 * Go down the directory hierarchy. Where we have to check for
728 * symlinks, do so. Where a .htaccess file has permission to
729 * override anything, try to find one.
737 /* We have no trailing slash, but we sure would appreciate one.
738 * However, we don't want to append a / our first time through.
740 if ((seg > startseg) && r->filename[filename_len-1] != '/') {
741 r->filename[filename_len++] = '/';
742 r->filename[filename_len] = 0;
746 /* Begin *this* level by looking for matching <Directory> sections
747 * from the server config.
749 for (; sec_idx < num_sec; ++sec_idx) {
751 ap_conf_vector_t *entry_config = sec_ent[sec_idx];
752 core_dir_config *entry_core;
753 entry_core = ap_get_module_config(entry_config, &core_module);
755 /* No more possible matches for this many segments?
756 * We are done when we find relative/regex/longer components.
758 if (entry_core->r || entry_core->d_components > seg) {
762 /* We will never skip '0' element components, e.g. plain old
763 * <Directory >, and <Directory "/"> are classified as zero
764 * so that Win32/Netware/OS2 etc all pick them up.
765 * Otherwise, skip over the mismatches.
767 if (entry_core->d_components
768 && ((entry_core->d_components < seg)
769 || (entry_core->d_is_fnmatch
770 ? (apr_fnmatch(entry_core->d, r->filename,
771 APR_FNM_PATHNAME) != APR_SUCCESS)
772 : (strcmp(r->filename, entry_core->d) != 0)))) {
776 /* If we haven't continue'd above, we have a match.
778 * Calculate our full-context core opts & override.
780 core_opts_merge(sec_ent[sec_idx], &opts);
782 /* If we merged this same section last time, reuse it
785 if (last_walk->matched == sec_ent[sec_idx]) {
786 now_merged = last_walk->merged;
792 /* We fell out of sync. This is our own copy of walked,
793 * so truncate the remaining matches and reset remaining.
795 cache->walked->nelts -= matches;
800 now_merged = ap_merge_per_dir_configs(r->pool,
805 now_merged = sec_ent[sec_idx];
808 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
809 last_walk->matched = sec_ent[sec_idx];
810 last_walk->merged = now_merged;
813 /* If .htaccess files are enabled, check for one, provided we
814 * have reached a real path.
816 do { /* Not really a loop, just a break'able code block */
818 ap_conf_vector_t *htaccess_conf = NULL;
820 /* No htaccess in an incomplete root path,
821 * nor if it's disabled
823 if (seg < startseg || !opts.override) {
827 res = ap_parse_htaccess(&htaccess_conf, r, opts.override,
829 apr_pstrdup(r->pool, r->filename),
835 if (!htaccess_conf) {
839 /* If we are still here, we found our htaccess.
841 * Calculate our full-context core opts & override.
843 core_opts_merge(htaccess_conf, &opts);
845 /* If we merged this same htaccess last time, reuse it...
846 * this wouldn't work except that we cache the htaccess
847 * sections for the lifetime of the request, so we match
848 * the same conf. Good planning (no, pure luck ;)
851 if (last_walk->matched == htaccess_conf) {
852 now_merged = last_walk->merged;
858 /* We fell out of sync. This is our own copy of walked,
859 * so truncate the remaining matches and reset
862 cache->walked->nelts -= matches;
867 now_merged = ap_merge_per_dir_configs(r->pool,
872 now_merged = htaccess_conf;
875 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
876 last_walk->matched = htaccess_conf;
877 last_walk->merged = now_merged;
879 } while (0); /* Only one htaccess, not a real loop */
881 /* That temporary trailing slash was useful, now drop it.
884 r->filename[--filename_len] = '\0';
887 /* Time for all good things to come to an end?
889 if (!r->path_info || !*r->path_info) {
893 /* Now it's time for the next segment...
894 * We will assume the next element is an end node, and fix it up
895 * below as necessary...
898 seg_name = r->filename + filename_len;
899 delim = strchr(r->path_info + (*r->path_info == '/' ? 1 : 0), '/');
901 size_t path_info_len = delim - r->path_info;
903 memcpy(seg_name, r->path_info, path_info_len + 1);
904 filename_len += path_info_len;
905 r->path_info = delim;
909 size_t path_info_len = strlen(r->path_info);
910 memcpy(seg_name, r->path_info, path_info_len + 1);
911 filename_len += path_info_len;
912 r->path_info += path_info_len;
914 if (*seg_name == '/')
917 /* If nothing remained but a '/' string, we are finished
918 * XXX: NO WE ARE NOT!!! Now process this puppy!!! */
923 /* First optimization;
924 * If...we knew r->filename was a file, and
925 * if...we have strict (case-sensitive) filenames, or
926 * we know the canonical_filename matches to _this_ name, and
927 * if...we have allowed symlinks
928 * skip the lstat and dummy up an APR_DIR value for thisinfo.
930 if (r->finfo.filetype
931 #ifdef CASE_BLIND_FILESYSTEM
932 && (filename_len <= canonical_len)
934 && ((opts.opts & (OPT_SYM_OWNER | OPT_SYM_LINKS)) == OPT_SYM_LINKS))
937 thisinfo.filetype = APR_DIR;
942 /* We choose apr_stat with flag APR_FINFO_LINK here, rather that
943 * plain apr_stat, so that we capture this path object rather than
944 * its target. We will replace the info with our target's info
945 * below. We especially want the name of this 'link' object, not
946 * the name of its target, if we are fixing the filename
947 * case/resolving aliases.
949 rv = apr_stat(&thisinfo, r->filename,
950 APR_FINFO_MIN | APR_FINFO_NAME | APR_FINFO_LINK,
953 if (APR_STATUS_IS_ENOENT(rv)) {
954 /* Nothing? That could be nice. But our directory
957 thisinfo.filetype = APR_NOFILE;
960 else if (APR_STATUS_IS_EACCES(rv)) {
961 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
962 "access to %s denied", r->uri);
963 return r->status = HTTP_FORBIDDEN;
965 else if ((rv != APR_SUCCESS && rv != APR_INCOMPLETE)
966 || !(thisinfo.valid & APR_FINFO_TYPE)) {
967 /* If we hit ENOTDIR, we must have over-optimized, deny
968 * rather than assume not found.
970 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
971 "access to %s failed", r->uri);
972 return r->status = HTTP_FORBIDDEN;
975 /* Fix up the path now if we have a name, and they don't agree
977 if ((thisinfo.valid & APR_FINFO_NAME)
978 && strcmp(seg_name, thisinfo.name)) {
979 /* TODO: provide users an option that an internal/external
980 * redirect is required here? We need to walk the URI and
981 * filename in tandem to properly correlate these.
983 strcpy(seg_name, thisinfo.name);
984 filename_len = strlen(r->filename);
987 if (thisinfo.filetype == APR_LNK) {
988 /* Is this a possibly acceptable symlink?
990 if ((res = resolve_symlink(r->filename, &thisinfo,
991 opts.opts, r->pool)) != OK) {
992 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
993 "Symbolic link not allowed: %s",
995 return r->status = res;
999 /* Ok, we are done with the link's info, test the real target
1001 if (thisinfo.filetype == APR_REG ||
1002 thisinfo.filetype == APR_NOFILE) {
1003 /* That was fun, nothing left for us here
1007 else if (thisinfo.filetype != APR_DIR) {
1008 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
1009 "Forbidden: %s doesn't point to "
1010 "a file or directory",
1012 return r->status = HTTP_FORBIDDEN;
1016 } while (thisinfo.filetype == APR_DIR);
1018 /* If we have _not_ optimized, this is the time to recover
1019 * the final stat result.
1021 if (!r->finfo.filetype || r->finfo.filetype == APR_LNK) {
1022 r->finfo = thisinfo;
1025 /* Now splice the saved path_info back onto any new path_info
1027 if (save_path_info) {
1028 if (r->path_info && *r->path_info) {
1029 r->path_info = ap_make_full_path(r->pool, r->path_info,
1033 r->path_info = save_path_info;
1038 * Now we'll deal with the regexes, note we pick up sec_idx
1039 * where we left off (we gave up after we hit entry_core->r)
1041 for (; sec_idx < num_sec; ++sec_idx) {
1043 core_dir_config *entry_core;
1044 entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
1046 if (!entry_core->r) {
1050 if (ap_regexec(entry_core->r, r->filename, 0, NULL, REG_NOTEOL)) {
1054 /* If we haven't already continue'd above, we have a match.
1056 * Calculate our full-context core opts & override.
1058 core_opts_merge(sec_ent[sec_idx], &opts);
1060 /* If we merged this same section last time, reuse it
1063 if (last_walk->matched == sec_ent[sec_idx]) {
1064 now_merged = last_walk->merged;
1070 /* We fell out of sync. This is our own copy of walked,
1071 * so truncate the remaining matches and reset remaining.
1073 cache->walked->nelts -= matches;
1078 now_merged = ap_merge_per_dir_configs(r->pool,
1083 now_merged = sec_ent[sec_idx];
1086 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
1087 last_walk->matched = sec_ent[sec_idx];
1088 last_walk->merged = now_merged;
1091 /* Whoops - everything matched in sequence, but the original walk
1092 * found some additional matches. Truncate them.
1095 cache->walked->nelts -= matches;
1099 /* It seems this shouldn't be needed anymore. We translated the
1100 x symlink above into a real resource, and should have died up there.
1101 x Even if we keep this, it needs more thought (maybe an r->file_is_symlink)
1102 x perhaps it should actually happen in file_walk, so we catch more
1103 x obscure cases in autoindex subrequests, etc.
1105 x * Symlink permissions are determined by the parent. If the request is
1106 x * for a directory then applying the symlink test here would use the
1107 x * permissions of the directory as opposed to its parent. Consider a
1108 x * symlink pointing to a dir with a .htaccess disallowing symlinks. If
1109 x * you access /symlink (or /symlink/) you would get a 403 without this
1110 x * APR_DIR test. But if you accessed /symlink/index.html, for example,
1111 x * you would *not* get the 403.
1113 x if (r->finfo.filetype != APR_DIR
1114 x && (res = resolve_symlink(r->filename, r->info, ap_allow_options(r),
1116 x ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
1117 x "Symbolic link not allowed: %s", r->filename);
1122 /* Save future sub-requestors much angst in processing
1123 * this subrequest. If dir_walk couldn't canonicalize
1124 * the file path, nothing can.
1126 r->canonical_filename = r->filename;
1128 if (r->finfo.filetype == APR_DIR) {
1129 cache->cached = r->filename;
1132 cache->cached = ap_make_dirstr_parent(r->pool, r->filename);
1135 cache->dir_conf_tested = sec_ent;
1136 cache->dir_conf_merged = r->per_dir_config;
1138 /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
1139 * and note the end result to (potentially) skip this step next time.
1142 r->per_dir_config = ap_merge_per_dir_configs(r->pool,
1146 cache->per_dir_result = r->per_dir_config;
1152 AP_DECLARE(int) ap_location_walk(request_rec *r)
1154 ap_conf_vector_t *now_merged = NULL;
1155 core_server_config *sconf = ap_get_module_config(r->server->module_config,
1157 ap_conf_vector_t **sec_ent = (ap_conf_vector_t **)sconf->sec_url->elts;
1158 int num_sec = sconf->sec_url->nelts;
1159 walk_cache_t *cache;
1160 const char *entry_uri;
1162 /* No tricks here, there are no <Locations > to parse in this vhost.
1163 * We won't destroy the cache, just in case _this_ redirect is later
1164 * redirected again to a vhost with <Location > blocks to optimize.
1170 cache = prep_walk_cache(AP_NOTE_LOCATION_WALK, r);
1172 /* Location and LocationMatch differ on their behaviour w.r.t. multiple
1173 * slashes. Location matches multiple slashes with a single slash,
1174 * LocationMatch doesn't. An exception, for backwards brokenness is
1175 * absoluteURIs... in which case neither match multiple slashes.
1177 if (r->uri[0] != '/') {
1181 char *uri = apr_pstrdup(r->pool, r->uri);
1186 /* If we have an cache->cached location that matches r->uri,
1187 * and the vhost's list of locations hasn't changed, we can skip
1188 * rewalking the location_walk entries.
1191 && (cache->dir_conf_tested == sec_ent)
1192 && (strcmp(entry_uri, cache->cached) == 0)) {
1193 /* Well this looks really familiar! If our end-result (per_dir_result)
1194 * didn't change, we have absolutely nothing to do :)
1195 * Otherwise (as is the case with most dir_merged/file_merged requests)
1196 * we must merge our dir_conf_merged onto this new r->per_dir_config.
1198 if (r->per_dir_config == cache->per_dir_result) {
1202 if (r->per_dir_config == cache->dir_conf_merged) {
1203 r->per_dir_config = cache->per_dir_result;
1207 if (cache->walked->nelts) {
1208 now_merged = ((walk_walked_t*)cache->walked->elts)
1209 [cache->walked->nelts - 1].merged;
1213 /* We start now_merged from NULL since we want to build
1214 * a locations list that can be merged to any vhost.
1217 int matches = cache->walked->nelts;
1218 walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
1219 cache->cached = entry_uri;
1221 /* Go through the location entries, and check for matches.
1222 * We apply the directive sections in given order, we should
1223 * really try them with the most general first.
1225 for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) {
1227 core_dir_config *entry_core;
1228 entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
1230 /* ### const strlen can be optimized in location config parsing */
1231 len = strlen(entry_core->d);
1233 /* Test the regex, fnmatch or string as appropriate.
1234 * If it's a strcmp, and the <Location > pattern was
1235 * not slash terminated, then this uri must be slash
1236 * terminated (or at the end of the string) to match.
1239 ? ap_regexec(entry_core->r, r->uri, 0, NULL, 0)
1240 : (entry_core->d_is_fnmatch
1241 ? apr_fnmatch(entry_core->d, cache->cached, APR_FNM_PATHNAME)
1242 : (strncmp(entry_core->d, cache->cached, len)
1243 || (entry_core->d[len - 1] != '/'
1244 && cache->cached[len] != '/'
1245 && cache->cached[len] != '\0')))) {
1249 /* If we merged this same section last time, reuse it
1252 if (last_walk->matched == sec_ent[sec_idx]) {
1253 now_merged = last_walk->merged;
1259 /* We fell out of sync. This is our own copy of walked,
1260 * so truncate the remaining matches and reset remaining.
1262 cache->walked->nelts -= matches;
1267 now_merged = ap_merge_per_dir_configs(r->pool,
1272 now_merged = sec_ent[sec_idx];
1275 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
1276 last_walk->matched = sec_ent[sec_idx];
1277 last_walk->merged = now_merged;
1280 /* Whoops - everything matched in sequence, but the original walk
1281 * found some additional matches. Truncate them.
1284 cache->walked->nelts -= matches;
1288 cache->dir_conf_tested = sec_ent;
1289 cache->dir_conf_merged = r->per_dir_config;
1291 /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
1292 * and note the end result to (potentially) skip this step next time.
1295 r->per_dir_config = ap_merge_per_dir_configs(r->pool,
1299 cache->per_dir_result = r->per_dir_config;
1304 AP_DECLARE(int) ap_file_walk(request_rec *r)
1306 ap_conf_vector_t *now_merged = NULL;
1307 core_dir_config *dconf = ap_get_module_config(r->per_dir_config,
1309 ap_conf_vector_t **sec_ent = (ap_conf_vector_t **)dconf->sec_file->elts;
1310 int num_sec = dconf->sec_file->nelts;
1311 walk_cache_t *cache;
1312 const char *test_file;
1314 /* To allow broken modules to proceed, we allow missing filenames to pass.
1315 * We will catch it later if it's heading for the core handler.
1316 * directory_walk already posted an INFO note for module debugging.
1318 if (r->filename == NULL) {
1322 cache = prep_walk_cache(AP_NOTE_FILE_WALK, r);
1324 /* No tricks here, there are just no <Files > to parse in this context.
1325 * We won't destroy the cache, just in case _this_ redirect is later
1326 * redirected again to a context containing the same or similar <Files >.
1332 /* Get the basename .. and copy for the cache just
1333 * in case r->filename is munged by another module
1335 test_file = strrchr(r->filename, '/');
1336 if (test_file == NULL) {
1337 test_file = apr_pstrdup(r->pool, r->filename);
1340 test_file = apr_pstrdup(r->pool, ++test_file);
1343 /* If we have an cache->cached file name that matches test_file,
1344 * and the directory's list of file sections hasn't changed, we
1345 * can skip rewalking the file_walk entries.
1348 && (cache->dir_conf_tested == sec_ent)
1349 && (strcmp(test_file, cache->cached) == 0)) {
1350 /* Well this looks really familiar! If our end-result (per_dir_result)
1351 * didn't change, we have absolutely nothing to do :)
1352 * Otherwise (as is the case with most dir_merged requests)
1353 * we must merge our dir_conf_merged onto this new r->per_dir_config.
1355 if (r->per_dir_config == cache->per_dir_result) {
1359 if (r->per_dir_config == cache->dir_conf_merged) {
1360 r->per_dir_config = cache->per_dir_result;
1364 if (cache->walked->nelts) {
1365 now_merged = ((walk_walked_t*)cache->walked->elts)
1366 [cache->walked->nelts - 1].merged;
1370 /* We start now_merged from NULL since we want to build
1371 * a file section list that can be merged to any dir_walk.
1374 int matches = cache->walked->nelts;
1375 walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
1376 cache->cached = test_file;
1378 /* Go through the location entries, and check for matches.
1379 * We apply the directive sections in given order, we should
1380 * really try them with the most general first.
1382 for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) {
1384 core_dir_config *entry_core;
1385 entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
1388 ? ap_regexec(entry_core->r, cache->cached , 0, NULL, 0)
1389 : (entry_core->d_is_fnmatch
1390 ? apr_fnmatch(entry_core->d, cache->cached, APR_FNM_PATHNAME)
1391 : strcmp(entry_core->d, cache->cached))) {
1395 /* If we merged this same section last time, reuse it
1398 if (last_walk->matched == sec_ent[sec_idx]) {
1399 now_merged = last_walk->merged;
1405 /* We fell out of sync. This is our own copy of walked,
1406 * so truncate the remaining matches and reset remaining.
1408 cache->walked->nelts -= matches;
1413 now_merged = ap_merge_per_dir_configs(r->pool,
1418 now_merged = sec_ent[sec_idx];
1421 last_walk = (walk_walked_t*)apr_array_push(cache->walked);
1422 last_walk->matched = sec_ent[sec_idx];
1423 last_walk->merged = now_merged;
1426 /* Whoops - everything matched in sequence, but the original walk
1427 * found some additional matches. Truncate them.
1430 cache->walked->nelts -= matches;
1434 cache->dir_conf_tested = sec_ent;
1435 cache->dir_conf_merged = r->per_dir_config;
1437 /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
1438 * and note the end result to (potentially) skip this step next time.
1441 r->per_dir_config = ap_merge_per_dir_configs(r->pool,
1445 cache->per_dir_result = r->per_dir_config;
1450 /*****************************************************************
1452 * The sub_request mechanism.
1454 * Fns to look up a relative URI from, e.g., a map file or SSI document.
1455 * These do all access checks, etc., but don't actually run the transaction
1456 * ... use run_sub_req below for that. Also, be sure to use destroy_sub_req
1457 * as appropriate if you're likely to be creating more than a few of these.
1458 * (An early Apache version didn't destroy the sub_reqs used in directory
1459 * indexing. The result, when indexing a directory with 800-odd files in
1460 * it, was massively excessive storage allocation).
1462 * Note more manipulation of protocol-specific vars in the request
1466 static request_rec *make_sub_request(const request_rec *r,
1467 ap_filter_t *next_filter)
1472 apr_pool_create(&rrp, r->pool);
1473 apr_pool_tag(rrp, "subrequest");
1474 rnew = apr_pcalloc(rrp, sizeof(request_rec));
1477 rnew->hostname = r->hostname;
1478 rnew->request_time = r->request_time;
1479 rnew->connection = r->connection;
1480 rnew->server = r->server;
1482 rnew->request_config = ap_create_request_config(rnew->pool);
1484 /* Start a clean config from this subrequest's vhost. Optimization in
1485 * Location/File/Dir walks from the parent request assure that if the
1486 * config blocks of the subrequest match the parent request, no merges
1487 * will actually occur (and generally a minimal number of merges are
1488 * required, even if the parent and subrequest aren't quite identical.)
1490 rnew->per_dir_config = r->server->lookup_defaults;
1492 rnew->htaccess = r->htaccess;
1493 rnew->allowed_methods = ap_make_method_list(rnew->pool, 2);
1495 /* make a copy of the allowed-methods list */
1496 ap_copy_method_list(rnew->allowed_methods, r->allowed_methods);
1498 /* start with the same set of output filters */
1500 /* while there are no input filters for a subrequest, we will
1501 * try to insert some, so if we don't have valid data, the code
1504 rnew->input_filters = r->input_filters;
1505 rnew->proto_input_filters = r->proto_input_filters;
1506 rnew->output_filters = next_filter;
1507 rnew->proto_output_filters = r->proto_output_filters;
1508 ap_add_output_filter_handle(ap_subreq_core_filter_handle,
1509 NULL, rnew, rnew->connection);
1512 /* If NULL - we are expecting to be internal_fast_redirect'ed
1513 * to this subrequest - or this request will never be invoked.
1514 * Ignore the original request filter stack entirely, and
1515 * drill the input and output stacks back to the connection.
1517 rnew->proto_input_filters = r->proto_input_filters;
1518 rnew->proto_output_filters = r->proto_output_filters;
1520 rnew->input_filters = r->proto_input_filters;
1521 rnew->output_filters = r->proto_output_filters;
1524 /* no input filters for a subrequest */
1526 ap_set_sub_req_protocol(rnew, r);
1528 /* We have to run this after we fill in sub req vars,
1529 * or the r->main pointer won't be setup
1531 ap_run_create_request(rnew);
1536 AP_CORE_DECLARE_NONSTD(apr_status_t) ap_sub_req_output_filter(ap_filter_t *f,
1537 apr_bucket_brigade *bb)
1539 apr_bucket *e = APR_BRIGADE_LAST(bb);
1541 if (APR_BUCKET_IS_EOS(e)) {
1542 apr_bucket_delete(e);
1545 if (!APR_BRIGADE_EMPTY(bb)) {
1546 return ap_pass_brigade(f->next, bb);
1553 AP_DECLARE(int) ap_some_auth_required(request_rec *r)
1555 /* Is there a require line configured for the type of *this* req? */
1557 const apr_array_header_t *reqs_arr = ap_requires(r);
1565 reqs = (require_line *) reqs_arr->elts;
1567 for (i = 0; i < reqs_arr->nelts; ++i) {
1568 if (reqs[i].method_mask & (AP_METHOD_BIT << r->method_number)) {
1577 AP_DECLARE(request_rec *) ap_sub_req_method_uri(const char *method,
1578 const char *new_uri,
1579 const request_rec *r,
1580 ap_filter_t *next_filter)
1586 rnew = make_sub_request(r, next_filter);
1588 /* would be nicer to pass "method" to ap_set_sub_req_protocol */
1589 rnew->method = method;
1590 rnew->method_number = ap_method_number_of(method);
1592 if (new_uri[0] == '/') {
1593 ap_parse_uri(rnew, new_uri);
1596 udir = ap_make_dirstr_parent(rnew->pool, r->uri);
1597 udir = ap_escape_uri(rnew->pool, udir); /* re-escape it */
1598 ap_parse_uri(rnew, ap_make_full_path(rnew->pool, udir, new_uri));
1601 /* We cannot return NULL without violating the API. So just turn this
1602 * subrequest into a 500 to indicate the failure. */
1603 if (ap_is_recursion_limit_exceeded(r)) {
1604 rnew->status = HTTP_INTERNAL_SERVER_ERROR;
1609 * If the content can be served by the quick_handler, we can
1610 * safely bypass request_internal processing.
1612 res = ap_run_quick_handler(rnew, 1);
1615 if ((res = ap_process_request_internal(rnew))) {
1623 AP_DECLARE(request_rec *) ap_sub_req_lookup_uri(const char *new_uri,
1624 const request_rec *r,
1625 ap_filter_t *next_filter)
1627 return ap_sub_req_method_uri("GET", new_uri, r, next_filter);
1630 AP_DECLARE(request_rec *) ap_sub_req_lookup_dirent(const apr_finfo_t *dirent,
1631 const request_rec *r,
1633 ap_filter_t *next_filter)
1640 rnew = make_sub_request(r, next_filter);
1642 /* Special case: we are looking at a relative lookup in the same directory.
1643 * This is 100% safe, since dirent->name just came from the filesystem.
1645 if (r->path_info && *r->path_info) {
1646 /* strip path_info off the end of the uri to keep it in sync
1647 * with r->filename, which has already been stripped by directory_walk,
1648 * merge the dirent->name, and then, if the caller wants us to remerge
1649 * the original path info, do so. Note we never fix the path_info back
1650 * to r->filename, since dir_walk would do so (but we don't expect it
1651 * to happen in the usual cases)
1653 udir = apr_pstrdup(rnew->pool, r->uri);
1654 udir[ap_find_path_info(udir, r->path_info)] = '\0';
1655 udir = ap_make_dirstr_parent(rnew->pool, udir);
1657 rnew->uri = ap_make_full_path(rnew->pool, udir, dirent->name);
1658 if (subtype == AP_SUBREQ_MERGE_ARGS) {
1659 rnew->uri = ap_make_full_path(rnew->pool, rnew->uri, r->path_info + 1);
1660 rnew->path_info = apr_pstrdup(rnew->pool, r->path_info);
1662 rnew->uri = ap_escape_uri(rnew->pool, rnew->uri);
1665 udir = ap_make_dirstr_parent(rnew->pool, r->uri);
1666 rnew->uri = ap_escape_uri(rnew->pool, ap_make_full_path(rnew->pool,
1671 fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
1672 rnew->filename = ap_make_full_path(rnew->pool, fdir, dirent->name);
1673 if (r->canonical_filename == r->filename) {
1674 rnew->canonical_filename = rnew->filename;
1677 /* XXX This is now less relevant; we will do a full location walk
1678 * these days for this case. Preserve the apr_stat results, and
1679 * perhaps we also tag that symlinks were tested and/or found for
1682 rnew->per_dir_config = r->server->lookup_defaults;
1684 if ((dirent->valid & APR_FINFO_MIN) != APR_FINFO_MIN) {
1686 * apr_dir_read isn't very complete on this platform, so
1687 * we need another apr_stat (with or without APR_FINFO_LINK
1688 * depending on whether we allow all symlinks here.) If this
1689 * is an APR_LNK that resolves to an APR_DIR, then we will rerun
1690 * everything anyways... this should be safe.
1693 if (ap_allow_options(rnew) & OPT_SYM_LINKS) {
1694 if (((rv = apr_stat(&rnew->finfo, rnew->filename,
1695 APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
1696 && (rv != APR_INCOMPLETE)) {
1697 rnew->finfo.filetype = 0;
1701 if (((rv = apr_stat(&rnew->finfo, rnew->filename,
1702 APR_FINFO_LINK | APR_FINFO_MIN,
1703 rnew->pool)) != APR_SUCCESS)
1704 && (rv != APR_INCOMPLETE)) {
1705 rnew->finfo.filetype = 0;
1710 memcpy(&rnew->finfo, dirent, sizeof(apr_finfo_t));
1713 if (rnew->finfo.filetype == APR_LNK) {
1715 * Resolve this symlink. We should tie this back to dir_walk's cache
1717 if ((res = resolve_symlink(rnew->filename, &rnew->finfo,
1718 ap_allow_options(rnew), rnew->pool))
1725 if (rnew->finfo.filetype == APR_DIR) {
1726 /* ap_make_full_path overallocated the buffers
1727 * by one character to help us out here.
1729 strcpy(rnew->filename + strlen(rnew->filename), "/");
1730 if (!rnew->path_info || !*rnew->path_info) {
1731 strcpy(rnew->uri + strlen(rnew->uri ), "/");
1735 /* fill in parsed_uri values
1737 if (r->args && *r->args && (subtype == AP_SUBREQ_MERGE_ARGS)) {
1738 ap_parse_uri(rnew, apr_pstrcat(r->pool, rnew->uri, "?",
1742 ap_parse_uri(rnew, rnew->uri);
1745 /* We cannot return NULL without violating the API. So just turn this
1746 * subrequest into a 500. */
1747 if (ap_is_recursion_limit_exceeded(r)) {
1748 rnew->status = HTTP_INTERNAL_SERVER_ERROR;
1752 if ((res = ap_process_request_internal(rnew))) {
1759 AP_DECLARE(request_rec *) ap_sub_req_lookup_file(const char *new_file,
1760 const request_rec *r,
1761 ap_filter_t *next_filter)
1768 rnew = make_sub_request(r, next_filter);
1770 fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
1771 fdirlen = strlen(fdir);
1773 /* Translate r->filename, if it was canonical, it stays canonical
1775 if (r->canonical_filename == r->filename) {
1776 rnew->canonical_filename = (char*)(1);
1779 if (apr_filepath_merge(&rnew->filename, fdir, new_file,
1780 APR_FILEPATH_TRUENAME, rnew->pool) != APR_SUCCESS) {
1781 rnew->status = HTTP_FORBIDDEN;
1785 if (rnew->canonical_filename) {
1786 rnew->canonical_filename = rnew->filename;
1790 * Check for a special case... if there are no '/' characters in new_file
1791 * at all, and the path was the same, then we are looking at a relative
1792 * lookup in the same directory. Fixup the URI to match.
1795 if (strncmp(rnew->filename, fdir, fdirlen) == 0
1796 && rnew->filename[fdirlen]
1797 && ap_strchr_c(rnew->filename + fdirlen, '/') == NULL) {
1799 if (ap_allow_options(rnew) & OPT_SYM_LINKS) {
1800 if (((rv = apr_stat(&rnew->finfo, rnew->filename,
1801 APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
1802 && (rv != APR_INCOMPLETE)) {
1803 rnew->finfo.filetype = 0;
1807 if (((rv = apr_stat(&rnew->finfo, rnew->filename,
1808 APR_FINFO_LINK | APR_FINFO_MIN,
1809 rnew->pool)) != APR_SUCCESS)
1810 && (rv != APR_INCOMPLETE)) {
1811 rnew->finfo.filetype = 0;
1815 if (r->uri && *r->uri) {
1816 char *udir = ap_make_dirstr_parent(rnew->pool, r->uri);
1817 rnew->uri = ap_make_full_path(rnew->pool, udir,
1818 rnew->filename + fdirlen);
1819 ap_parse_uri(rnew, rnew->uri); /* fill in parsed_uri values */
1822 ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */
1823 rnew->uri = apr_pstrdup(rnew->pool, "");
1827 /* XXX: @@@: What should be done with the parsed_uri values?
1828 * We would be better off stripping down to the 'common' elements
1829 * of the path, then reassembling the URI as best as we can.
1831 ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */
1833 * XXX: this should be set properly like it is in the same-dir case
1834 * but it's actually sometimes to impossible to do it... because the
1835 * file may not have a uri associated with it -djg
1837 rnew->uri = apr_pstrdup(rnew->pool, "");
1840 /* We cannot return NULL without violating the API. So just turn this
1841 * subrequest into a 500. */
1842 if (ap_is_recursion_limit_exceeded(r)) {
1843 rnew->status = HTTP_INTERNAL_SERVER_ERROR;
1847 if ((res = ap_process_request_internal(rnew))) {
1854 AP_DECLARE(int) ap_run_sub_req(request_rec *r)
1856 int retval = DECLINED;
1857 /* Run the quick handler if the subrequest is not a dirent or file
1860 if (!(r->filename && r->finfo.filetype)) {
1861 retval = ap_run_quick_handler(r, 0);
1864 retval = ap_invoke_handler(r);
1865 if (retval == DONE) {
1869 ap_finalize_sub_req_protocol(r);
1873 AP_DECLARE(void) ap_destroy_sub_req(request_rec *r)
1875 /* Reclaim the space */
1876 apr_pool_destroy(r->pool);
1880 * Function to set the r->mtime field to the specified value if it's later
1881 * than what's already there.
1883 AP_DECLARE(void) ap_update_mtime(request_rec *r, apr_time_t dependency_mtime)
1885 if (r->mtime < dependency_mtime) {
1886 r->mtime = dependency_mtime;
1891 * Is it the initial main request, which we only get *once* per HTTP request?
1893 AP_DECLARE(int) ap_is_initial_req(request_rec *r)
1895 return (r->main == NULL) /* otherwise, this is a sub-request */
1896 && (r->prev == NULL); /* otherwise, this is an internal redirect */