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-rw-r--r--rubbos/app/httpd-2.0.64/server/request.c1888
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diff --git a/rubbos/app/httpd-2.0.64/server/request.c b/rubbos/app/httpd-2.0.64/server/request.c
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--- a/rubbos/app/httpd-2.0.64/server/request.c
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@@ -1,1888 +0,0 @@
-/* Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * http_request.c: functions to get and process requests
- *
- * Rob McCool 3/21/93
- *
- * Thoroughly revamped by rst for Apache. NB this file reads
- * best from the bottom up.
- *
- */
-
-#include "apr_strings.h"
-#include "apr_file_io.h"
-#include "apr_fnmatch.h"
-
-#define APR_WANT_STRFUNC
-#include "apr_want.h"
-
-#define CORE_PRIVATE
-#include "ap_config.h"
-#include "httpd.h"
-#include "http_config.h"
-#include "http_request.h"
-#include "http_core.h"
-#include "http_protocol.h"
-#include "http_log.h"
-#include "http_main.h"
-#include "util_filter.h"
-#include "util_charset.h"
-#include "util_script.h"
-
-#include "mod_core.h"
-
-#if APR_HAVE_STDARG_H
-#include <stdarg.h>
-#endif
-
-APR_HOOK_STRUCT(
- APR_HOOK_LINK(translate_name)
- APR_HOOK_LINK(map_to_storage)
- APR_HOOK_LINK(check_user_id)
- APR_HOOK_LINK(fixups)
- APR_HOOK_LINK(type_checker)
- APR_HOOK_LINK(access_checker)
- APR_HOOK_LINK(auth_checker)
- APR_HOOK_LINK(insert_filter)
- APR_HOOK_LINK(create_request)
-)
-
-AP_IMPLEMENT_HOOK_RUN_FIRST(int,translate_name,
- (request_rec *r), (r), DECLINED)
-AP_IMPLEMENT_HOOK_RUN_FIRST(int,map_to_storage,
- (request_rec *r), (r), DECLINED)
-AP_IMPLEMENT_HOOK_RUN_FIRST(int,check_user_id,
- (request_rec *r), (r), DECLINED)
-AP_IMPLEMENT_HOOK_RUN_ALL(int,fixups,
- (request_rec *r), (r), OK, DECLINED)
-AP_IMPLEMENT_HOOK_RUN_FIRST(int,type_checker,
- (request_rec *r), (r), DECLINED)
-AP_IMPLEMENT_HOOK_RUN_ALL(int,access_checker,
- (request_rec *r), (r), OK, DECLINED)
-AP_IMPLEMENT_HOOK_RUN_FIRST(int,auth_checker,
- (request_rec *r), (r), DECLINED)
-AP_IMPLEMENT_HOOK_VOID(insert_filter, (request_rec *r), (r))
-AP_IMPLEMENT_HOOK_RUN_ALL(int, create_request,
- (request_rec *r), (r), OK, DECLINED)
-
-
-static int decl_die(int status, char *phase, request_rec *r)
-{
- if (status == DECLINED) {
- ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r,
- "configuration error: couldn't %s: %s", phase, r->uri);
- return HTTP_INTERNAL_SERVER_ERROR;
- }
- else {
- return status;
- }
-}
-
-/* This is the master logic for processing requests. Do NOT duplicate
- * this logic elsewhere, or the security model will be broken by future
- * API changes. Each phase must be individually optimized to pick up
- * redundant/duplicate calls by subrequests, and redirects.
- */
-AP_DECLARE(int) ap_process_request_internal(request_rec *r)
-{
- int file_req = (r->main && r->filename);
- int access_status;
-
- /* Ignore embedded %2F's in path for proxy requests */
- if (!r->proxyreq && r->parsed_uri.path) {
- core_dir_config *d;
- d = ap_get_module_config(r->per_dir_config, &core_module);
- if (d->allow_encoded_slashes) {
- access_status = ap_unescape_url_keep2f(r->parsed_uri.path);
- }
- else {
- access_status = ap_unescape_url(r->parsed_uri.path);
- }
- if (access_status) {
- if (access_status == HTTP_NOT_FOUND) {
- if (! d->allow_encoded_slashes) {
- ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
- "found %%2f (encoded '/') in URI "
- "(decoded='%s'), returning 404",
- r->parsed_uri.path);
- }
- }
- return access_status;
- }
- }
-
- ap_getparents(r->uri); /* OK --- shrinking transformations... */
-
- /* All file subrequests are a huge pain... they cannot bubble through the
- * next several steps. Only file subrequests are allowed an empty uri,
- * otherwise let translate_name kill the request.
- */
- if (!file_req) {
- if ((access_status = ap_location_walk(r))) {
- return access_status;
- }
-
- if ((access_status = ap_run_translate_name(r))) {
- return decl_die(access_status, "translate", r);
- }
- }
-
- /* Reset to the server default config prior to running map_to_storage
- */
- r->per_dir_config = r->server->lookup_defaults;
-
- if ((access_status = ap_run_map_to_storage(r))) {
- /* This request wasn't in storage (e.g. TRACE) */
- return access_status;
- }
-
- /* Excluding file-specific requests with no 'true' URI...
- */
- if (!file_req) {
- /* Rerun the location walk, which overrides any map_to_storage config.
- */
- if ((access_status = ap_location_walk(r))) {
- return access_status;
- }
- }
-
- /* Only on the main request! */
- if (r->main == NULL) {
- if ((access_status = ap_run_header_parser(r))) {
- return access_status;
- }
- }
-
- /* Skip authn/authz if the parent or prior request passed the authn/authz,
- * and that configuration didn't change (this requires optimized _walk()
- * functions in map_to_storage that use the same merge results given
- * identical input.) If the config changes, we must re-auth.
- */
- if (r->main && (r->main->per_dir_config == r->per_dir_config)) {
- r->user = r->main->user;
- r->ap_auth_type = r->main->ap_auth_type;
- }
- else if (r->prev && (r->prev->per_dir_config == r->per_dir_config)) {
- r->user = r->prev->user;
- r->ap_auth_type = r->prev->ap_auth_type;
- }
- else {
- switch (ap_satisfies(r)) {
- case SATISFY_ALL:
- case SATISFY_NOSPEC:
- if ((access_status = ap_run_access_checker(r)) != 0) {
- return decl_die(access_status, "check access", r);
- }
-
- if (ap_some_auth_required(r)) {
- if (((access_status = ap_run_check_user_id(r)) != 0)
- || !ap_auth_type(r)) {
- return decl_die(access_status, ap_auth_type(r)
- ? "check user. No user file?"
- : "perform authentication. AuthType not set!",
- r);
- }
-
- if (((access_status = ap_run_auth_checker(r)) != 0)
- || !ap_auth_type(r)) {
- return decl_die(access_status, ap_auth_type(r)
- ? "check access. No groups file?"
- : "perform authentication. AuthType not set!",
- r);
- }
- }
- break;
-
- case SATISFY_ANY:
- if (((access_status = ap_run_access_checker(r)) != 0)) {
- if (!ap_some_auth_required(r)) {
- return decl_die(access_status, "check access", r);
- }
-
- if (((access_status = ap_run_check_user_id(r)) != 0)
- || !ap_auth_type(r)) {
- return decl_die(access_status, ap_auth_type(r)
- ? "check user. No user file?"
- : "perform authentication. AuthType not set!",
- r);
- }
-
- if (((access_status = ap_run_auth_checker(r)) != 0)
- || !ap_auth_type(r)) {
- return decl_die(access_status, ap_auth_type(r)
- ? "check access. No groups file?"
- : "perform authentication. AuthType not set!",
- r);
- }
- }
- break;
- }
- }
- /* XXX Must make certain the ap_run_type_checker short circuits mime
- * in mod-proxy for r->proxyreq && r->parsed_uri.scheme
- * && !strcmp(r->parsed_uri.scheme, "http")
- */
- if ((access_status = ap_run_type_checker(r)) != 0) {
- return decl_die(access_status, "find types", r);
- }
-
- if ((access_status = ap_run_fixups(r)) != 0) {
- return access_status;
- }
-
- return OK;
-}
-
-
-/* Useful caching structures to repeat _walk/merge sequences as required
- * when a subrequest or redirect reuses substantially the same config.
- *
- * Directive order in the httpd.conf file and its Includes significantly
- * impact this optimization. Grouping common blocks at the front of the
- * config that are less likely to change between a request and
- * its subrequests, or between a request and its redirects reduced
- * the work of these functions significantly.
- */
-
-typedef struct walk_walked_t {
- ap_conf_vector_t *matched; /* A dir_conf sections we matched */
- ap_conf_vector_t *merged; /* The dir_conf merged result */
-} walk_walked_t;
-
-typedef struct walk_cache_t {
- const char *cached; /* The identifier we matched */
- ap_conf_vector_t **dir_conf_tested; /* The sections we matched against */
- ap_conf_vector_t *dir_conf_merged; /* Base per_dir_config */
- ap_conf_vector_t *per_dir_result; /* per_dir_config += walked result */
- apr_array_header_t *walked; /* The list of walk_walked_t results */
-} walk_cache_t;
-
-static walk_cache_t *prep_walk_cache(apr_size_t t, request_rec *r)
-{
- walk_cache_t *cache;
- void **note;
-
- /* Find the most relevant, recent entry to work from. That would be
- * this request (on the second call), or the parent request of a
- * subrequest, or the prior request of an internal redirect. Provide
- * this _walk()er with a copy it is allowed to munge. If there is no
- * parent or prior cached request, then create a new walk cache.
- */
- note = ap_get_request_note(r, t);
- if (!note) {
- return NULL;
- }
-
- if (!(cache = *note)) {
- void **inherit_note;
-
- if ((r->main
- && ((inherit_note = ap_get_request_note(r->main, t)))
- && *inherit_note)
- || (r->prev
- && ((inherit_note = ap_get_request_note(r->prev, t)))
- && *inherit_note)) {
- cache = apr_pmemdup(r->pool, *inherit_note,
- sizeof(*cache));
- cache->walked = apr_array_copy(r->pool, cache->walked);
- }
- else {
- cache = apr_pcalloc(r->pool, sizeof(*cache));
- cache->walked = apr_array_make(r->pool, 4, sizeof(walk_walked_t));
- }
-
- *note = cache;
- }
- return cache;
-}
-
-/*****************************************************************
- *
- * Getting and checking directory configuration. Also checks the
- * FollowSymlinks and FollowSymOwner stuff, since this is really the
- * only place that can happen (barring a new mid_dir_walk callout).
- *
- * We can't do it as an access_checker module function which gets
- * called with the final per_dir_config, since we could have a directory
- * with FollowSymLinks disabled, which contains a symlink to another
- * with a .htaccess file which turns FollowSymLinks back on --- and
- * access in such a case must be denied. So, whatever it is that
- * checks FollowSymLinks needs to know the state of the options as
- * they change, all the way down.
- */
-
-
-/*
- * resolve_symlink must _always_ be called on an APR_LNK file type!
- * It will resolve the actual target file type, modification date, etc,
- * and provide any processing required for symlink evaluation.
- * Path must already be cleaned, no trailing slash, no multi-slashes,
- * and don't call this on the root!
- *
- * Simply, the number of times we deref a symlink are minimal compared
- * to the number of times we had an extra lstat() since we 'weren't sure'.
- *
- * To optimize, we stat() anything when given (opts & OPT_SYM_LINKS), otherwise
- * we start off with an lstat(). Every lstat() must be dereferenced in case
- * it points at a 'nasty' - we must always rerun check_safe_file (or similar.)
- */
-static int resolve_symlink(char *d, apr_finfo_t *lfi, int opts, apr_pool_t *p)
-{
- apr_finfo_t fi;
- int res;
- const char *savename;
-
- if (!(opts & (OPT_SYM_OWNER | OPT_SYM_LINKS))) {
- return HTTP_FORBIDDEN;
- }
-
- /* Save the name from the valid bits. */
- savename = (lfi->valid & APR_FINFO_NAME) ? lfi->name : NULL;
-
- if (opts & OPT_SYM_LINKS) {
- if ((res = apr_stat(&fi, d, lfi->valid & ~(APR_FINFO_NAME
- | APR_FINFO_LINK), p))
- != APR_SUCCESS) {
- return HTTP_FORBIDDEN;
- }
-
- /* Give back the target */
- memcpy(lfi, &fi, sizeof(fi));
- if (savename) {
- lfi->name = savename;
- lfi->valid |= APR_FINFO_NAME;
- }
-
- return OK;
- }
-
- /* OPT_SYM_OWNER only works if we can get the owner of
- * both the file and symlink. First fill in a missing
- * owner of the symlink, then get the info of the target.
- */
- if (!(lfi->valid & APR_FINFO_OWNER)) {
- if ((res = apr_lstat(&fi, d, lfi->valid | APR_FINFO_OWNER, p))
- != APR_SUCCESS) {
- return HTTP_FORBIDDEN;
- }
- }
-
- if ((res = apr_stat(&fi, d, lfi->valid & ~(APR_FINFO_NAME), p))
- != APR_SUCCESS) {
- return HTTP_FORBIDDEN;
- }
-
- if (apr_compare_users(fi.user, lfi->user) != APR_SUCCESS) {
- return HTTP_FORBIDDEN;
- }
-
- /* Give back the target */
- memcpy(lfi, &fi, sizeof(fi));
- if (savename) {
- lfi->name = savename;
- lfi->valid |= APR_FINFO_NAME;
- }
-
- return OK;
-}
-
-
-/*
- * As we walk the directory configuration, the merged config won't
- * be 'rooted' to a specific vhost until the very end of the merge.
- *
- * We need a very fast mini-merge to a real, vhost-rooted merge
- * of core.opts and core.override, the only options tested within
- * directory_walk itself.
- *
- * See core.c::merge_core_dir_configs() for explanation.
- */
-
-typedef struct core_opts_t {
- allow_options_t opts;
- allow_options_t add;
- allow_options_t remove;
- overrides_t override;
-} core_opts_t;
-
-static void core_opts_merge(const ap_conf_vector_t *sec, core_opts_t *opts)
-{
- core_dir_config *this_dir = ap_get_module_config(sec, &core_module);
-
- if (!this_dir) {
- return;
- }
-
- if (this_dir->opts & OPT_UNSET) {
- opts->add = (opts->add & ~this_dir->opts_remove)
- | this_dir->opts_add;
- opts->remove = (opts->remove & ~this_dir->opts_add)
- | this_dir->opts_remove;
- opts->opts = (opts->opts & ~opts->remove) | opts->add;
- }
- else {
- opts->opts = this_dir->opts;
- opts->add = this_dir->opts_add;
- opts->remove = this_dir->opts_remove;
- }
-
- if (!(this_dir->override & OR_UNSET)) {
- opts->override = this_dir->override;
- }
-}
-
-
-/*****************************************************************
- *
- * Getting and checking directory configuration. Also checks the
- * FollowSymlinks and FollowSymOwner stuff, since this is really the
- * only place that can happen (barring a new mid_dir_walk callout).
- *
- * We can't do it as an access_checker module function which gets
- * called with the final per_dir_config, since we could have a directory
- * with FollowSymLinks disabled, which contains a symlink to another
- * with a .htaccess file which turns FollowSymLinks back on --- and
- * access in such a case must be denied. So, whatever it is that
- * checks FollowSymLinks needs to know the state of the options as
- * they change, all the way down.
- */
-
-AP_DECLARE(int) ap_directory_walk(request_rec *r)
-{
- ap_conf_vector_t *now_merged = NULL;
- core_server_config *sconf = ap_get_module_config(r->server->module_config,
- &core_module);
- ap_conf_vector_t **sec_ent = (ap_conf_vector_t **) sconf->sec_dir->elts;
- int num_sec = sconf->sec_dir->nelts;
- walk_cache_t *cache;
- char *entry_dir;
- apr_status_t rv;
-
- /* XXX: Better (faster) tests needed!!!
- *
- * "OK" as a response to a real problem is not _OK_, but to allow broken
- * modules to proceed, we will permit the not-a-path filename to pass the
- * following two tests. This behavior may be revoked in future versions
- * of Apache. We still must catch it later if it's heading for the core
- * handler. Leave INFO notes here for module debugging.
- */
- if (r->filename == NULL) {
- ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
- "Module bug? Request filename is missing for URI %s",
- r->uri);
- return OK;
- }
-
- /* Canonicalize the file path without resolving filename case or aliases
- * so we can begin by checking the cache for a recent directory walk.
- * This call will ensure we have an absolute path in the same pass.
- */
- if ((rv = apr_filepath_merge(&entry_dir, NULL, r->filename,
- APR_FILEPATH_NOTRELATIVE, r->pool))
- != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
- "Module bug? Request filename path %s is invalid or "
- "or not absolute for uri %s",
- r->filename, r->uri);
- return OK;
- }
-
- /* XXX Notice that this forces path_info to be canonical. That might
- * not be desired by all apps. However, some of those same apps likely
- * have significant security holes.
- */
- r->filename = entry_dir;
-
- cache = prep_walk_cache(AP_NOTE_DIRECTORY_WALK, r);
-
- /* If this is not a dirent subrequest with a preconstructed
- * r->finfo value, then we can simply stat the filename to
- * save burning mega-cycles with unneeded stats - if this is
- * an exact file match. We don't care about failure... we
- * will stat by component failing this meager attempt.
- *
- * It would be nice to distinguish APR_ENOENT from other
- * types of failure, such as APR_ENOTDIR. We can do something
- * with APR_ENOENT, knowing that the path is good.
- */
- if (!r->finfo.filetype || r->finfo.filetype == APR_LNK) {
- rv = apr_stat(&r->finfo, r->filename, APR_FINFO_MIN, r->pool);
-
- /* some OSs will return APR_SUCCESS/APR_REG if we stat
- * a regular file but we have '/' at the end of the name;
- *
- * other OSs will return APR_ENOTDIR for that situation;
- *
- * handle it the same everywhere by simulating a failure
- * if it looks like a directory but really isn't
- *
- * Also reset if the stat failed, just for safety.
- */
- if ((rv != APR_SUCCESS) ||
- (r->finfo.filetype &&
- (r->finfo.filetype != APR_DIR) &&
- (r->filename[strlen(r->filename) - 1] == '/'))) {
- r->finfo.filetype = 0; /* forget what we learned */
- }
- }
-
- if (r->finfo.filetype == APR_REG) {
- entry_dir = ap_make_dirstr_parent(r->pool, entry_dir);
- }
- else if (r->filename[strlen(r->filename) - 1] != '/') {
- entry_dir = apr_pstrcat(r->pool, r->filename, "/", NULL);
- }
-
- /* If we have a file already matches the path of r->filename,
- * and the vhost's list of directory sections hasn't changed,
- * we can skip rewalking the directory_walk entries.
- */
- if (cache->cached
- && ((r->finfo.filetype == APR_REG)
- || ((r->finfo.filetype == APR_DIR)
- && (!r->path_info || !*r->path_info)))
- && (cache->dir_conf_tested == sec_ent)
- && (strcmp(entry_dir, cache->cached) == 0)) {
- /* Well this looks really familiar! If our end-result (per_dir_result)
- * didn't change, we have absolutely nothing to do :)
- * Otherwise (as is the case with most dir_merged/file_merged requests)
- * we must merge our dir_conf_merged onto this new r->per_dir_config.
- */
- if (r->per_dir_config == cache->per_dir_result) {
- return OK;
- }
-
- if (r->per_dir_config == cache->dir_conf_merged) {
- r->per_dir_config = cache->per_dir_result;
- return OK;
- }
-
- if (cache->walked->nelts) {
- now_merged = ((walk_walked_t*)cache->walked->elts)
- [cache->walked->nelts - 1].merged;
- }
- }
- else {
- /* We start now_merged from NULL since we want to build
- * a locations list that can be merged to any vhost.
- */
- int sec_idx;
- int matches = cache->walked->nelts;
- walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
- core_dir_config *this_dir;
- core_opts_t opts;
- apr_finfo_t thisinfo;
- char *save_path_info;
- apr_size_t buflen;
- char *buf;
- unsigned int seg, startseg;
-
- /* Invariant: from the first time filename_len is set until
- * it goes out of scope, filename_len==strlen(r->filename)
- */
- apr_size_t filename_len;
-#ifdef CASE_BLIND_FILESYSTEM
- apr_size_t canonical_len;
-#endif
-
- /*
- * We must play our own mini-merge game here, for the few
- * running dir_config values we care about within dir_walk.
- * We didn't start the merge from r->per_dir_config, so we
- * accumulate opts and override as we merge, from the globals.
- */
- this_dir = ap_get_module_config(r->per_dir_config, &core_module);
- opts.opts = this_dir->opts;
- opts.add = this_dir->opts_add;
- opts.remove = this_dir->opts_remove;
- opts.override = this_dir->override;
-
- /* Set aside path_info to merge back onto path_info later.
- * If r->filename is a directory, we must remerge the path_info,
- * before we continue! [Directories cannot, by defintion, have
- * path info. Either the next segment is not-found, or a file.]
- *
- * r->path_info tracks the unconsumed source path.
- * r->filename tracks the path as we process it
- */
- if ((r->finfo.filetype == APR_DIR) && r->path_info && *r->path_info)
- {
- if ((rv = apr_filepath_merge(&r->path_info, r->filename,
- r->path_info,
- APR_FILEPATH_NOTABOVEROOT, r->pool))
- != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
- "dir_walk error, path_info %s is not relative "
- "to the filename path %s for uri %s",
- r->path_info, r->filename, r->uri);
- return HTTP_INTERNAL_SERVER_ERROR;
- }
-
- save_path_info = NULL;
- }
- else {
- save_path_info = r->path_info;
- r->path_info = r->filename;
- }
-
-#ifdef CASE_BLIND_FILESYSTEM
-
- canonical_len = 0;
- while (r->canonical_filename && r->canonical_filename[canonical_len]
- && (r->canonical_filename[canonical_len]
- == r->path_info[canonical_len])) {
- ++canonical_len;
- }
-
- while (canonical_len
- && ((r->canonical_filename[canonical_len - 1] != '/'
- && r->canonical_filename[canonical_len - 1])
- || (r->path_info[canonical_len - 1] != '/'
- && r->path_info[canonical_len - 1]))) {
- --canonical_len;
- }
-
- /*
- * Now build r->filename component by component, starting
- * with the root (on Unix, simply "/"). We will make a huge
- * assumption here for efficiency, that any canonical path
- * already given included a canonical root.
- */
- rv = apr_filepath_root((const char **)&r->filename,
- (const char **)&r->path_info,
- canonical_len ? 0 : APR_FILEPATH_TRUENAME,
- r->pool);
- filename_len = strlen(r->filename);
-
- /*
- * Bad assumption above? If the root's length is longer
- * than the canonical length, then it cannot be trusted as
- * a truename. So try again, this time more seriously.
- */
- if ((rv == APR_SUCCESS) && canonical_len
- && (filename_len > canonical_len)) {
- rv = apr_filepath_root((const char **)&r->filename,
- (const char **)&r->path_info,
- APR_FILEPATH_TRUENAME, r->pool);
- filename_len = strlen(r->filename);
- canonical_len = 0;
- }
-
-#else /* ndef CASE_BLIND_FILESYSTEM, really this simple for Unix today; */
-
- rv = apr_filepath_root((const char **)&r->filename,
- (const char **)&r->path_info,
- 0, r->pool);
- filename_len = strlen(r->filename);
-
-#endif
-
- if (rv != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
- "dir_walk error, could not determine the root "
- "path of filename %s%s for uri %s",
- r->filename, r->path_info, r->uri);
- return HTTP_INTERNAL_SERVER_ERROR;
- }
-
- /* Working space for terminating null and an extra / is required.
- */
- buflen = filename_len + strlen(r->path_info) + 2;
- buf = apr_palloc(r->pool, buflen);
- memcpy(buf, r->filename, filename_len + 1);
- r->filename = buf;
- thisinfo.valid = APR_FINFO_TYPE;
- thisinfo.filetype = APR_DIR; /* It's the root, of course it's a dir */
-
- /*
- * seg keeps track of which segment we've copied.
- * sec_idx keeps track of which section we're on, since sections are
- * ordered by number of segments. See core_reorder_directories
- * startseg tells us how many segments describe the root path
- * e.g. the complete path "//host/foo/" to a UNC share (4)
- */
- startseg = seg = ap_count_dirs(r->filename);
- sec_idx = 0;
-
- /*
- * Go down the directory hierarchy. Where we have to check for
- * symlinks, do so. Where a .htaccess file has permission to
- * override anything, try to find one.
- */
- do {
- int res;
- char *seg_name;
- char *delim;
- int temp_slash=0;
-
- /* We have no trailing slash, but we sure would appreciate one.
- * However, we don't want to append a / our first time through.
- */
- if ((seg > startseg) && r->filename[filename_len-1] != '/') {
- r->filename[filename_len++] = '/';
- r->filename[filename_len] = 0;
- temp_slash=1;
- }
-
- /* Begin *this* level by looking for matching <Directory> sections
- * from the server config.
- */
- for (; sec_idx < num_sec; ++sec_idx) {
-
- ap_conf_vector_t *entry_config = sec_ent[sec_idx];
- core_dir_config *entry_core;
- entry_core = ap_get_module_config(entry_config, &core_module);
-
- /* No more possible matches for this many segments?
- * We are done when we find relative/regex/longer components.
- */
- if (entry_core->r || entry_core->d_components > seg) {
- break;
- }
-
- /* We will never skip '0' element components, e.g. plain old
- * <Directory >, and <Directory "/"> are classified as zero
- * so that Win32/Netware/OS2 etc all pick them up.
- * Otherwise, skip over the mismatches.
- */
- if (entry_core->d_components
- && ((entry_core->d_components < seg)
- || (entry_core->d_is_fnmatch
- ? (apr_fnmatch(entry_core->d, r->filename,
- FNM_PATHNAME) != APR_SUCCESS)
- : (strcmp(r->filename, entry_core->d) != 0)))) {
- continue;
- }
-
- /* If we haven't continue'd above, we have a match.
- *
- * Calculate our full-context core opts & override.
- */
- core_opts_merge(sec_ent[sec_idx], &opts);
-
- /* If we merged this same section last time, reuse it
- */
- if (matches) {
- if (last_walk->matched == sec_ent[sec_idx]) {
- now_merged = last_walk->merged;
- ++last_walk;
- --matches;
- continue;
- }
-
- /* We fell out of sync. This is our own copy of walked,
- * so truncate the remaining matches and reset remaining.
- */
- cache->walked->nelts -= matches;
- matches = 0;
- }
-
- if (now_merged) {
- now_merged = ap_merge_per_dir_configs(r->pool,
- now_merged,
- sec_ent[sec_idx]);
- }
- else {
- now_merged = sec_ent[sec_idx];
- }
-
- last_walk = (walk_walked_t*)apr_array_push(cache->walked);
- last_walk->matched = sec_ent[sec_idx];
- last_walk->merged = now_merged;
- }
-
- /* If .htaccess files are enabled, check for one, provided we
- * have reached a real path.
- */
- do { /* Not really a loop, just a break'able code block */
-
- ap_conf_vector_t *htaccess_conf = NULL;
-
- /* No htaccess in an incomplete root path,
- * nor if it's disabled
- */
- if (seg < startseg || !opts.override) {
- break;
- }
-
- res = ap_parse_htaccess(&htaccess_conf, r, opts.override,
- apr_pstrdup(r->pool, r->filename),
- sconf->access_name);
- if (res) {
- return res;
- }
-
- if (!htaccess_conf) {
- break;
- }
-
- /* If we are still here, we found our htaccess.
- *
- * Calculate our full-context core opts & override.
- */
- core_opts_merge(htaccess_conf, &opts);
-
- /* If we merged this same htaccess last time, reuse it...
- * this wouldn't work except that we cache the htaccess
- * sections for the lifetime of the request, so we match
- * the same conf. Good planning (no, pure luck ;)
- */
- if (matches) {
- if (last_walk->matched == htaccess_conf) {
- now_merged = last_walk->merged;
- ++last_walk;
- --matches;
- break;
- }
-
- /* We fell out of sync. This is our own copy of walked,
- * so truncate the remaining matches and reset
- * remaining.
- */
- cache->walked->nelts -= matches;
- matches = 0;
- }
-
- if (now_merged) {
- now_merged = ap_merge_per_dir_configs(r->pool,
- now_merged,
- htaccess_conf);
- }
- else {
- now_merged = htaccess_conf;
- }
-
- last_walk = (walk_walked_t*)apr_array_push(cache->walked);
- last_walk->matched = htaccess_conf;
- last_walk->merged = now_merged;
-
- } while (0); /* Only one htaccess, not a real loop */
-
- /* That temporary trailing slash was useful, now drop it.
- */
- if (temp_slash) {
- r->filename[--filename_len] = '\0';
- }
-
- /* Time for all good things to come to an end?
- */
- if (!r->path_info || !*r->path_info) {
- break;
- }
-
- /* Now it's time for the next segment...
- * We will assume the next element is an end node, and fix it up
- * below as necessary...
- */
-
- seg_name = r->filename + filename_len;
- delim = strchr(r->path_info + (*r->path_info == '/' ? 1 : 0), '/');
- if (delim) {
- size_t path_info_len = delim - r->path_info;
- *delim = '\0';
- memcpy(seg_name, r->path_info, path_info_len + 1);
- filename_len += path_info_len;
- r->path_info = delim;
- *delim = '/';
- }
- else {
- size_t path_info_len = strlen(r->path_info);
- memcpy(seg_name, r->path_info, path_info_len + 1);
- filename_len += path_info_len;
- r->path_info += path_info_len;
- }
- if (*seg_name == '/')
- ++seg_name;
-
- /* If nothing remained but a '/' string, we are finished
- */
- if (!*seg_name) {
- break;
- }
-
- /* First optimization;
- * If...we knew r->filename was a file, and
- * if...we have strict (case-sensitive) filenames, or
- * we know the canonical_filename matches to _this_ name, and
- * if...we have allowed symlinks
- * skip the lstat and dummy up an APR_DIR value for thisinfo.
- */
- if (r->finfo.filetype
-#ifdef CASE_BLIND_FILESYSTEM
- && (filename_len <= canonical_len)
-#endif
- && ((opts.opts & (OPT_SYM_OWNER | OPT_SYM_LINKS)) == OPT_SYM_LINKS))
- {
-
- thisinfo.filetype = APR_DIR;
- ++seg;
- continue;
- }
-
- /* We choose apr_lstat here, rather that apr_stat, so that we
- * capture this path object rather than its target. We will
- * replace the info with our target's info below. We especially
- * want the name of this 'link' object, not the name of its
- * target, if we are fixing the filename case/resolving aliases.
- */
- rv = apr_lstat(&thisinfo, r->filename,
- APR_FINFO_MIN | APR_FINFO_NAME, r->pool);
-
- if (APR_STATUS_IS_ENOENT(rv)) {
- /* Nothing? That could be nice. But our directory
- * walk is done.
- */
- thisinfo.filetype = APR_NOFILE;
- break;
- }
- else if (APR_STATUS_IS_EACCES(rv)) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
- "access to %s denied", r->uri);
- return r->status = HTTP_FORBIDDEN;
- }
- else if ((rv != APR_SUCCESS && rv != APR_INCOMPLETE)
- || !(thisinfo.valid & APR_FINFO_TYPE)) {
- /* If we hit ENOTDIR, we must have over-optimized, deny
- * rather than assume not found.
- */
- ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
- "access to %s failed", r->uri);
- return r->status = HTTP_FORBIDDEN;
- }
-
- /* Fix up the path now if we have a name, and they don't agree
- */
- if ((thisinfo.valid & APR_FINFO_NAME)
- && strcmp(seg_name, thisinfo.name)) {
- /* TODO: provide users an option that an internal/external
- * redirect is required here? We need to walk the URI and
- * filename in tandem to properly correlate these.
- */
- strcpy(seg_name, thisinfo.name);
- filename_len = strlen(r->filename);
- }
-
- if (thisinfo.filetype == APR_LNK) {
- /* Is this a possibly acceptable symlink?
- */
- if ((res = resolve_symlink(r->filename, &thisinfo,
- opts.opts, r->pool)) != OK) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "Symbolic link not allowed: %s",
- r->filename);
- return r->status = res;
- }
- }
-
- /* Ok, we are done with the link's info, test the real target
- */
- if (thisinfo.filetype == APR_REG ||
- thisinfo.filetype == APR_NOFILE) {
- /* That was fun, nothing left for us here
- */
- break;
- }
- else if (thisinfo.filetype != APR_DIR) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "Forbidden: %s doesn't point to "
- "a file or directory",
- r->filename);
- return r->status = HTTP_FORBIDDEN;
- }
-
- ++seg;
- } while (thisinfo.filetype == APR_DIR);
-
- /* If we have _not_ optimized, this is the time to recover
- * the final stat result.
- */
- if (!r->finfo.filetype || r->finfo.filetype == APR_LNK) {
- r->finfo = thisinfo;
- }
-
- /* Now splice the saved path_info back onto any new path_info
- */
- if (save_path_info) {
- if (r->path_info && *r->path_info) {
- r->path_info = ap_make_full_path(r->pool, r->path_info,
- save_path_info);
- }
- else {
- r->path_info = save_path_info;
- }
- }
-
- /*
- * Now we'll deal with the regexes, note we pick up sec_idx
- * where we left off (we gave up after we hit entry_core->r)
- */
- for (; sec_idx < num_sec; ++sec_idx) {
-
- core_dir_config *entry_core;
- entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
-
- if (!entry_core->r) {
- continue;
- }
-
- if (ap_regexec(entry_core->r, r->filename, 0, NULL, REG_NOTEOL)) {
- continue;
- }
-
- /* If we haven't already continue'd above, we have a match.
- *
- * Calculate our full-context core opts & override.
- */
- core_opts_merge(sec_ent[sec_idx], &opts);
-
- /* If we merged this same section last time, reuse it
- */
- if (matches) {
- if (last_walk->matched == sec_ent[sec_idx]) {
- now_merged = last_walk->merged;
- ++last_walk;
- --matches;
- continue;
- }
-
- /* We fell out of sync. This is our own copy of walked,
- * so truncate the remaining matches and reset remaining.
- */
- cache->walked->nelts -= matches;
- matches = 0;
- }
-
- if (now_merged) {
- now_merged = ap_merge_per_dir_configs(r->pool,
- now_merged,
- sec_ent[sec_idx]);
- }
- else {
- now_merged = sec_ent[sec_idx];
- }
-
- last_walk = (walk_walked_t*)apr_array_push(cache->walked);
- last_walk->matched = sec_ent[sec_idx];
- last_walk->merged = now_merged;
- }
-
- /* Whoops - everything matched in sequence, but the original walk
- * found some additional matches. Truncate them.
- */
- if (matches) {
- cache->walked->nelts -= matches;
- }
- }
-
-/* It seems this shouldn't be needed anymore. We translated the
- x symlink above into a real resource, and should have died up there.
- x Even if we keep this, it needs more thought (maybe an r->file_is_symlink)
- x perhaps it should actually happen in file_walk, so we catch more
- x obscure cases in autoindex subrequests, etc.
- x
- x * Symlink permissions are determined by the parent. If the request is
- x * for a directory then applying the symlink test here would use the
- x * permissions of the directory as opposed to its parent. Consider a
- x * symlink pointing to a dir with a .htaccess disallowing symlinks. If
- x * you access /symlink (or /symlink/) you would get a 403 without this
- x * APR_DIR test. But if you accessed /symlink/index.html, for example,
- x * you would *not* get the 403.
- x
- x if (r->finfo.filetype != APR_DIR
- x && (res = resolve_symlink(r->filename, r->info, ap_allow_options(r),
- x r->pool))) {
- x ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- x "Symbolic link not allowed: %s", r->filename);
- x return res;
- x }
- */
-
- /* Save future sub-requestors much angst in processing
- * this subrequest. If dir_walk couldn't canonicalize
- * the file path, nothing can.
- */
- r->canonical_filename = r->filename;
-
- if (r->finfo.filetype == APR_DIR) {
- cache->cached = r->filename;
- }
- else {
- cache->cached = ap_make_dirstr_parent(r->pool, r->filename);
- }
-
- cache->dir_conf_tested = sec_ent;
- cache->dir_conf_merged = r->per_dir_config;
-
- /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
- * and note the end result to (potentially) skip this step next time.
- */
- if (now_merged) {
- r->per_dir_config = ap_merge_per_dir_configs(r->pool,
- r->per_dir_config,
- now_merged);
- }
- cache->per_dir_result = r->per_dir_config;
-
- return OK;
-}
-
-
-AP_DECLARE(int) ap_location_walk(request_rec *r)
-{
- ap_conf_vector_t *now_merged = NULL;
- core_server_config *sconf = ap_get_module_config(r->server->module_config,
- &core_module);
- ap_conf_vector_t **sec_ent = (ap_conf_vector_t **)sconf->sec_url->elts;
- int num_sec = sconf->sec_url->nelts;
- walk_cache_t *cache;
- const char *entry_uri;
-
- /* No tricks here, there are no <Locations > to parse in this vhost.
- * We won't destroy the cache, just in case _this_ redirect is later
- * redirected again to a vhost with <Location > blocks to optimize.
- */
- if (!num_sec) {
- return OK;
- }
-
- cache = prep_walk_cache(AP_NOTE_LOCATION_WALK, r);
-
- /* Location and LocationMatch differ on their behaviour w.r.t. multiple
- * slashes. Location matches multiple slashes with a single slash,
- * LocationMatch doesn't. An exception, for backwards brokenness is
- * absoluteURIs... in which case neither match multiple slashes.
- */
- if (r->uri[0] != '/') {
- entry_uri = r->uri;
- }
- else {
- char *uri = apr_pstrdup(r->pool, r->uri);
- ap_no2slash(uri);
- entry_uri = uri;
- }
-
- /* If we have an cache->cached location that matches r->uri,
- * and the vhost's list of locations hasn't changed, we can skip
- * rewalking the location_walk entries.
- */
- if (cache->cached
- && (cache->dir_conf_tested == sec_ent)
- && (strcmp(entry_uri, cache->cached) == 0)) {
- /* Well this looks really familiar! If our end-result (per_dir_result)
- * didn't change, we have absolutely nothing to do :)
- * Otherwise (as is the case with most dir_merged/file_merged requests)
- * we must merge our dir_conf_merged onto this new r->per_dir_config.
- */
- if (r->per_dir_config == cache->per_dir_result) {
- return OK;
- }
-
- if (r->per_dir_config == cache->dir_conf_merged) {
- r->per_dir_config = cache->per_dir_result;
- return OK;
- }
-
- if (cache->walked->nelts) {
- now_merged = ((walk_walked_t*)cache->walked->elts)
- [cache->walked->nelts - 1].merged;
- }
- }
- else {
- /* We start now_merged from NULL since we want to build
- * a locations list that can be merged to any vhost.
- */
- int len, sec_idx;
- int matches = cache->walked->nelts;
- walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
- cache->cached = entry_uri;
-
- /* Go through the location entries, and check for matches.
- * We apply the directive sections in given order, we should
- * really try them with the most general first.
- */
- for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) {
-
- core_dir_config *entry_core;
- entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
-
- /* ### const strlen can be optimized in location config parsing */
- len = strlen(entry_core->d);
-
- /* Test the regex, fnmatch or string as appropriate.
- * If it's a strcmp, and the <Location > pattern was
- * not slash terminated, then this uri must be slash
- * terminated (or at the end of the string) to match.
- */
- if (entry_core->r
- ? ap_regexec(entry_core->r, r->uri, 0, NULL, 0)
- : (entry_core->d_is_fnmatch
- ? apr_fnmatch(entry_core->d, cache->cached, FNM_PATHNAME)
- : (strncmp(entry_core->d, cache->cached, len)
- || (entry_core->d[len - 1] != '/'
- && cache->cached[len] != '/'
- && cache->cached[len] != '\0')))) {
- continue;
- }
-
- /* If we merged this same section last time, reuse it
- */
- if (matches) {
- if (last_walk->matched == sec_ent[sec_idx]) {
- now_merged = last_walk->merged;
- ++last_walk;
- --matches;
- continue;
- }
-
- /* We fell out of sync. This is our own copy of walked,
- * so truncate the remaining matches and reset remaining.
- */
- cache->walked->nelts -= matches;
- matches = 0;
- }
-
- if (now_merged) {
- now_merged = ap_merge_per_dir_configs(r->pool,
- now_merged,
- sec_ent[sec_idx]);
- }
- else {
- now_merged = sec_ent[sec_idx];
- }
-
- last_walk = (walk_walked_t*)apr_array_push(cache->walked);
- last_walk->matched = sec_ent[sec_idx];
- last_walk->merged = now_merged;
- }
-
- /* Whoops - everything matched in sequence, but the original walk
- * found some additional matches. Truncate them.
- */
- if (matches) {
- cache->walked->nelts -= matches;
- }
- }
-
- cache->dir_conf_tested = sec_ent;
- cache->dir_conf_merged = r->per_dir_config;
-
- /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
- * and note the end result to (potentially) skip this step next time.
- */
- if (now_merged) {
- r->per_dir_config = ap_merge_per_dir_configs(r->pool,
- r->per_dir_config,
- now_merged);
- }
- cache->per_dir_result = r->per_dir_config;
-
- return OK;
-}
-
-AP_DECLARE(int) ap_file_walk(request_rec *r)
-{
- ap_conf_vector_t *now_merged = NULL;
- core_dir_config *dconf = ap_get_module_config(r->per_dir_config,
- &core_module);
- ap_conf_vector_t **sec_ent = (ap_conf_vector_t **)dconf->sec_file->elts;
- int num_sec = dconf->sec_file->nelts;
- walk_cache_t *cache;
- const char *test_file;
-
- /* To allow broken modules to proceed, we allow missing filenames to pass.
- * We will catch it later if it's heading for the core handler.
- * directory_walk already posted an INFO note for module debugging.
- */
- if (r->filename == NULL) {
- return OK;
- }
-
- cache = prep_walk_cache(AP_NOTE_FILE_WALK, r);
-
- /* No tricks here, there are just no <Files > to parse in this context.
- * We won't destroy the cache, just in case _this_ redirect is later
- * redirected again to a context containing the same or similar <Files >.
- */
- if (!num_sec) {
- return OK;
- }
-
- /* Get the basename .. and copy for the cache just
- * in case r->filename is munged by another module
- */
- test_file = strrchr(r->filename, '/');
- if (test_file == NULL) {
- test_file = apr_pstrdup(r->pool, r->filename);
- }
- else {
- test_file = apr_pstrdup(r->pool, ++test_file);
- }
-
- /* If we have an cache->cached file name that matches test_file,
- * and the directory's list of file sections hasn't changed, we
- * can skip rewalking the file_walk entries.
- */
- if (cache->cached
- && (cache->dir_conf_tested == sec_ent)
- && (strcmp(test_file, cache->cached) == 0)) {
- /* Well this looks really familiar! If our end-result (per_dir_result)
- * didn't change, we have absolutely nothing to do :)
- * Otherwise (as is the case with most dir_merged requests)
- * we must merge our dir_conf_merged onto this new r->per_dir_config.
- */
- if (r->per_dir_config == cache->per_dir_result) {
- return OK;
- }
-
- if (r->per_dir_config == cache->dir_conf_merged) {
- r->per_dir_config = cache->per_dir_result;
- return OK;
- }
-
- if (cache->walked->nelts) {
- now_merged = ((walk_walked_t*)cache->walked->elts)
- [cache->walked->nelts - 1].merged;
- }
- }
- else {
- /* We start now_merged from NULL since we want to build
- * a file section list that can be merged to any dir_walk.
- */
- int sec_idx;
- int matches = cache->walked->nelts;
- walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
- cache->cached = test_file;
-
- /* Go through the location entries, and check for matches.
- * We apply the directive sections in given order, we should
- * really try them with the most general first.
- */
- for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) {
-
- core_dir_config *entry_core;
- entry_core = ap_get_module_config(sec_ent[sec_idx], &core_module);
-
- if (entry_core->r
- ? ap_regexec(entry_core->r, cache->cached , 0, NULL, 0)
- : (entry_core->d_is_fnmatch
- ? apr_fnmatch(entry_core->d, cache->cached, FNM_PATHNAME)
- : strcmp(entry_core->d, cache->cached))) {
- continue;
- }
-
- /* If we merged this same section last time, reuse it
- */
- if (matches) {
- if (last_walk->matched == sec_ent[sec_idx]) {
- now_merged = last_walk->merged;
- ++last_walk;
- --matches;
- continue;
- }
-
- /* We fell out of sync. This is our own copy of walked,
- * so truncate the remaining matches and reset remaining.
- */
- cache->walked->nelts -= matches;
- matches = 0;
- }
-
- if (now_merged) {
- now_merged = ap_merge_per_dir_configs(r->pool,
- now_merged,
- sec_ent[sec_idx]);
- }
- else {
- now_merged = sec_ent[sec_idx];
- }
-
- last_walk = (walk_walked_t*)apr_array_push(cache->walked);
- last_walk->matched = sec_ent[sec_idx];
- last_walk->merged = now_merged;
- }
-
- /* Whoops - everything matched in sequence, but the original walk
- * found some additional matches. Truncate them.
- */
- if (matches) {
- cache->walked->nelts -= matches;
- }
- }
-
- cache->dir_conf_tested = sec_ent;
- cache->dir_conf_merged = r->per_dir_config;
-
- /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
- * and note the end result to (potentially) skip this step next time.
- */
- if (now_merged) {
- r->per_dir_config = ap_merge_per_dir_configs(r->pool,
- r->per_dir_config,
- now_merged);
- }
- cache->per_dir_result = r->per_dir_config;
-
- return OK;
-}
-
-/*****************************************************************
- *
- * The sub_request mechanism.
- *
- * Fns to look up a relative URI from, e.g., a map file or SSI document.
- * These do all access checks, etc., but don't actually run the transaction
- * ... use run_sub_req below for that. Also, be sure to use destroy_sub_req
- * as appropriate if you're likely to be creating more than a few of these.
- * (An early Apache version didn't destroy the sub_reqs used in directory
- * indexing. The result, when indexing a directory with 800-odd files in
- * it, was massively excessive storage allocation).
- *
- * Note more manipulation of protocol-specific vars in the request
- * structure...
- */
-
-static request_rec *make_sub_request(const request_rec *r,
- ap_filter_t *next_filter)
-{
- apr_pool_t *rrp;
- request_rec *rnew;
-
- apr_pool_create(&rrp, r->pool);
- apr_pool_tag(rrp, "subrequest");
- rnew = apr_pcalloc(rrp, sizeof(request_rec));
- rnew->pool = rrp;
-
- rnew->hostname = r->hostname;
- rnew->request_time = r->request_time;
- rnew->connection = r->connection;
- rnew->server = r->server;
-
- rnew->request_config = ap_create_request_config(rnew->pool);
-
- /* Start a clean config from this subrequest's vhost. Optimization in
- * Location/File/Dir walks from the parent request assure that if the
- * config blocks of the subrequest match the parent request, no merges
- * will actually occur (and generally a minimal number of merges are
- * required, even if the parent and subrequest aren't quite identical.)
- */
- rnew->per_dir_config = r->server->lookup_defaults;
-
- rnew->htaccess = r->htaccess;
- rnew->allowed_methods = ap_make_method_list(rnew->pool, 2);
-
- /* make a copy of the allowed-methods list */
- ap_copy_method_list(rnew->allowed_methods, r->allowed_methods);
-
- /* start with the same set of output filters */
- if (next_filter) {
- /* while there are no input filters for a subrequest, we will
- * try to insert some, so if we don't have valid data, the code
- * will seg fault.
- */
- rnew->input_filters = r->input_filters;
- rnew->proto_input_filters = r->proto_input_filters;
- rnew->output_filters = next_filter;
- rnew->proto_output_filters = r->proto_output_filters;
- ap_add_output_filter_handle(ap_subreq_core_filter_handle,
- NULL, rnew, rnew->connection);
- }
- else {
- /* If NULL - we are expecting to be internal_fast_redirect'ed
- * to this subrequest - or this request will never be invoked.
- * Ignore the original request filter stack entirely, and
- * drill the input and output stacks back to the connection.
- */
- rnew->proto_input_filters = r->proto_input_filters;
- rnew->proto_output_filters = r->proto_output_filters;
-
- rnew->input_filters = r->proto_input_filters;
- rnew->output_filters = r->proto_output_filters;
- }
-
- /* no input filters for a subrequest */
-
- ap_set_sub_req_protocol(rnew, r);
-
- /* We have to run this after we fill in sub req vars,
- * or the r->main pointer won't be setup
- */
- ap_run_create_request(rnew);
-
- return rnew;
-}
-
-AP_CORE_DECLARE_NONSTD(apr_status_t) ap_sub_req_output_filter(ap_filter_t *f,
- apr_bucket_brigade *bb)
-{
- apr_bucket *e = APR_BRIGADE_LAST(bb);
-
- if (APR_BUCKET_IS_EOS(e)) {
- apr_bucket_delete(e);
- }
-
- if (!APR_BRIGADE_EMPTY(bb)) {
- return ap_pass_brigade(f->next, bb);
- }
-
- return APR_SUCCESS;
-}
-
-
-AP_DECLARE(int) ap_some_auth_required(request_rec *r)
-{
- /* Is there a require line configured for the type of *this* req? */
-
- const apr_array_header_t *reqs_arr = ap_requires(r);
- require_line *reqs;
- int i;
-
- if (!reqs_arr) {
- return 0;
- }
-
- reqs = (require_line *) reqs_arr->elts;
-
- for (i = 0; i < reqs_arr->nelts; ++i) {
- if (reqs[i].method_mask & (AP_METHOD_BIT << r->method_number)) {
- return 1;
- }
- }
-
- return 0;
-}
-
-
-AP_DECLARE(request_rec *) ap_sub_req_method_uri(const char *method,
- const char *new_uri,
- const request_rec *r,
- ap_filter_t *next_filter)
-{
- request_rec *rnew;
- int res;
- char *udir;
-
- rnew = make_sub_request(r, next_filter);
-
- /* would be nicer to pass "method" to ap_set_sub_req_protocol */
- rnew->method = method;
- rnew->method_number = ap_method_number_of(method);
-
- if (new_uri[0] == '/') {
- ap_parse_uri(rnew, new_uri);
- }
- else {
- udir = ap_make_dirstr_parent(rnew->pool, r->uri);
- udir = ap_escape_uri(rnew->pool, udir); /* re-escape it */
- ap_parse_uri(rnew, ap_make_full_path(rnew->pool, udir, new_uri));
- }
-
- /* We cannot return NULL without violating the API. So just turn this
- * subrequest into a 500 to indicate the failure. */
- if (ap_is_recursion_limit_exceeded(r)) {
- rnew->status = HTTP_INTERNAL_SERVER_ERROR;
- return rnew;
- }
-
- /* lookup_uri
- * If the content can be served by the quick_handler, we can
- * safely bypass request_internal processing.
- */
- res = ap_run_quick_handler(rnew, 1);
-
- if (res != OK) {
- if ((res = ap_process_request_internal(rnew))) {
- rnew->status = res;
- }
- }
-
- return rnew;
-}
-
-AP_DECLARE(request_rec *) ap_sub_req_lookup_uri(const char *new_uri,
- const request_rec *r,
- ap_filter_t *next_filter)
-{
- return ap_sub_req_method_uri("GET", new_uri, r, next_filter);
-}
-
-AP_DECLARE(request_rec *) ap_sub_req_lookup_dirent(const apr_finfo_t *dirent,
- const request_rec *r,
- int subtype,
- ap_filter_t *next_filter)
-{
- request_rec *rnew;
- int res;
- char *fdir;
- char *udir;
-
- rnew = make_sub_request(r, next_filter);
-
- /* Special case: we are looking at a relative lookup in the same directory.
- * This is 100% safe, since dirent->name just came from the filesystem.
- */
- if (r->path_info && *r->path_info) {
- /* strip path_info off the end of the uri to keep it in sync
- * with r->filename, which has already been stripped by directory_walk,
- * merge the dirent->name, and then, if the caller wants us to remerge
- * the original path info, do so. Note we never fix the path_info back
- * to r->filename, since dir_walk would do so (but we don't expect it
- * to happen in the usual cases)
- */
- udir = apr_pstrdup(rnew->pool, r->uri);
- udir[ap_find_path_info(udir, r->path_info)] = '\0';
- udir = ap_make_dirstr_parent(rnew->pool, udir);
-
- rnew->uri = ap_make_full_path(rnew->pool, udir, dirent->name);
- if (subtype == AP_SUBREQ_MERGE_ARGS) {
- rnew->uri = ap_make_full_path(rnew->pool, rnew->uri, r->path_info + 1);
- rnew->path_info = apr_pstrdup(rnew->pool, r->path_info);
- }
- rnew->uri = ap_escape_uri(rnew->pool, rnew->uri);
- }
- else {
- udir = ap_make_dirstr_parent(rnew->pool, r->uri);
- rnew->uri = ap_escape_uri(rnew->pool, ap_make_full_path(rnew->pool,
- udir,
- dirent->name));
- }
-
- fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
- rnew->filename = ap_make_full_path(rnew->pool, fdir, dirent->name);
- if (r->canonical_filename == r->filename) {
- rnew->canonical_filename = rnew->filename;
- }
-
- /* XXX This is now less relevant; we will do a full location walk
- * these days for this case. Preserve the apr_stat results, and
- * perhaps we also tag that symlinks were tested and/or found for
- * r->filename.
- */
- rnew->per_dir_config = r->server->lookup_defaults;
-
- if ((dirent->valid & APR_FINFO_MIN) != APR_FINFO_MIN) {
- /*
- * apr_dir_read isn't very complete on this platform, so
- * we need another apr_lstat (or simply apr_stat if we allow
- * all symlinks here.) If this is an APR_LNK that resolves
- * to an APR_DIR, then we will rerun everything anyways...
- * this should be safe.
- */
- apr_status_t rv;
- if (ap_allow_options(rnew) & OPT_SYM_LINKS) {
- if (((rv = apr_stat(&rnew->finfo, rnew->filename,
- APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
- && (rv != APR_INCOMPLETE)) {
- rnew->finfo.filetype = 0;
- }
- }
- else {
- if (((rv = apr_lstat(&rnew->finfo, rnew->filename,
- APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
- && (rv != APR_INCOMPLETE)) {
- rnew->finfo.filetype = 0;
- }
- }
- }
- else {
- memcpy(&rnew->finfo, dirent, sizeof(apr_finfo_t));
- }
-
- if (rnew->finfo.filetype == APR_LNK) {
- /*
- * Resolve this symlink. We should tie this back to dir_walk's cache
- */
- if ((res = resolve_symlink(rnew->filename, &rnew->finfo,
- ap_allow_options(rnew), rnew->pool))
- != OK) {
- rnew->status = res;
- return rnew;
- }
- }
-
- if (rnew->finfo.filetype == APR_DIR) {
- /* ap_make_full_path overallocated the buffers
- * by one character to help us out here.
- */
- strcpy(rnew->filename + strlen(rnew->filename), "/");
- if (!rnew->path_info || !*rnew->path_info) {
- strcpy(rnew->uri + strlen(rnew->uri ), "/");
- }
- }
-
- /* fill in parsed_uri values
- */
- if (r->args && *r->args && (subtype == AP_SUBREQ_MERGE_ARGS)) {
- ap_parse_uri(rnew, apr_pstrcat(r->pool, rnew->uri, "?",
- r->args, NULL));
- }
- else {
- ap_parse_uri(rnew, rnew->uri);
- }
-
- /* We cannot return NULL without violating the API. So just turn this
- * subrequest into a 500. */
- if (ap_is_recursion_limit_exceeded(r)) {
- rnew->status = HTTP_INTERNAL_SERVER_ERROR;
- return rnew;
- }
-
- if ((res = ap_process_request_internal(rnew))) {
- rnew->status = res;
- }
-
- return rnew;
-}
-
-AP_DECLARE(request_rec *) ap_sub_req_lookup_file(const char *new_file,
- const request_rec *r,
- ap_filter_t *next_filter)
-{
- request_rec *rnew;
- int res;
- char *fdir;
- apr_size_t fdirlen;
-
- rnew = make_sub_request(r, next_filter);
-
- fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
- fdirlen = strlen(fdir);
-
- /* Translate r->filename, if it was canonical, it stays canonical
- */
- if (r->canonical_filename == r->filename) {
- rnew->canonical_filename = (char*)(1);
- }
-
- if (apr_filepath_merge(&rnew->filename, fdir, new_file,
- APR_FILEPATH_TRUENAME, rnew->pool) != APR_SUCCESS) {
- rnew->status = HTTP_FORBIDDEN;
- return rnew;
- }
-
- if (rnew->canonical_filename) {
- rnew->canonical_filename = rnew->filename;
- }
-
- /*
- * Check for a special case... if there are no '/' characters in new_file
- * at all, and the path was the same, then we are looking at a relative
- * lookup in the same directory. Fixup the URI to match.
- */
-
- if (strncmp(rnew->filename, fdir, fdirlen) == 0
- && rnew->filename[fdirlen]
- && ap_strchr_c(rnew->filename + fdirlen, '/') == NULL) {
- apr_status_t rv;
- if (ap_allow_options(rnew) & OPT_SYM_LINKS) {
- if (((rv = apr_stat(&rnew->finfo, rnew->filename,
- APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
- && (rv != APR_INCOMPLETE)) {
- rnew->finfo.filetype = 0;
- }
- }
- else {
- if (((rv = apr_lstat(&rnew->finfo, rnew->filename,
- APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
- && (rv != APR_INCOMPLETE)) {
- rnew->finfo.filetype = 0;
- }
- }
-
- if (r->uri && *r->uri) {
- char *udir = ap_make_dirstr_parent(rnew->pool, r->uri);
- rnew->uri = ap_make_full_path(rnew->pool, udir,
- rnew->filename + fdirlen);
- ap_parse_uri(rnew, rnew->uri); /* fill in parsed_uri values */
- }
- else {
- ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */
- rnew->uri = apr_pstrdup(rnew->pool, "");
- }
- }
- else {
- /* XXX: @@@: What should be done with the parsed_uri values?
- * We would be better off stripping down to the 'common' elements
- * of the path, then reassembling the URI as best as we can.
- */
- ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */
- /*
- * XXX: this should be set properly like it is in the same-dir case
- * but it's actually sometimes to impossible to do it... because the
- * file may not have a uri associated with it -djg
- */
- rnew->uri = apr_pstrdup(rnew->pool, "");
- }
-
- /* We cannot return NULL without violating the API. So just turn this
- * subrequest into a 500. */
- if (ap_is_recursion_limit_exceeded(r)) {
- rnew->status = HTTP_INTERNAL_SERVER_ERROR;
- return rnew;
- }
-
- if ((res = ap_process_request_internal(rnew))) {
- rnew->status = res;
- }
-
- return rnew;
-}
-
-AP_DECLARE(int) ap_run_sub_req(request_rec *r)
-{
- int retval = DECLINED;
- /* Run the quick handler if the subrequest is not a dirent or file
- * subrequest
- */
- if (!(r->filename && r->finfo.filetype)) {
- retval = ap_run_quick_handler(r, 0);
- }
- if (retval != OK) {
- retval = ap_invoke_handler(r);
- if (retval == DONE) {
- retval = OK;
- }
- }
- ap_finalize_sub_req_protocol(r);
- return retval;
-}
-
-AP_DECLARE(void) ap_destroy_sub_req(request_rec *r)
-{
- /* Reclaim the space */
- apr_pool_destroy(r->pool);
-}
-
-/*
- * Function to set the r->mtime field to the specified value if it's later
- * than what's already there.
- */
-AP_DECLARE(void) ap_update_mtime(request_rec *r, apr_time_t dependency_mtime)
-{
- if (r->mtime < dependency_mtime) {
- r->mtime = dependency_mtime;
- }
-}
-
-/*
- * Is it the initial main request, which we only get *once* per HTTP request?
- */
-AP_DECLARE(int) ap_is_initial_req(request_rec *r)
-{
- return (r->main == NULL) /* otherwise, this is a sub-request */
- && (r->prev == NULL); /* otherwise, this is an internal redirect */
-}