| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000-2001 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| * Portions of this software are based upon public domain software |
| * originally written at the National Center for Supercomputing Applications, |
| * University of Illinois, Urbana-Champaign. |
| */ |
| |
| /* |
| * 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 "mod_core.h" |
| |
| #if APR_HAVE_STDARG_H |
| #include <stdarg.h> |
| #endif |
| |
| APR_HOOK_STRUCT( |
| APR_HOOK_LINK(translate_name) |
| 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) |
| ) |
| |
| AP_IMPLEMENT_HOOK_RUN_FIRST(int,translate_name, |
| (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)) |
| |
| /***************************************************************** |
| * |
| * 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. |
| */ |
| |
| /* |
| * We don't want people able to serve up pipes, or unix sockets, or other |
| * scary things. Note that symlink tests are performed later. |
| */ |
| static int check_safe_file(request_rec *r) |
| { |
| |
| if (r->finfo.filetype == 0 /* doesn't exist */ |
| || r->finfo.filetype == APR_DIR |
| || r->finfo.filetype == APR_REG |
| || r->finfo.filetype == APR_LNK) { |
| return OK; |
| } |
| |
| ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r, |
| "object is not a file, directory or symlink: %s", |
| r->filename); |
| return HTTP_FORBIDDEN; |
| } |
| |
| |
| static int check_symlinks(char *d, int opts, apr_pool_t *p) |
| { |
| #if defined(OS2) |
| /* OS/2 doesn't have symlinks */ |
| return OK; |
| #else |
| apr_finfo_t lfi, fi; |
| char *lastp; |
| int res; |
| |
| if (opts & OPT_SYM_LINKS) |
| return OK; |
| |
| /* |
| * Strip trailing '/', if any, off what we're checking; trailing slashes |
| * make some systems follow symlinks to directories even in lstat(). |
| * After we've done the lstat, put it back. Also, don't bother checking |
| * '/' at all... |
| * |
| * Note that we don't have to worry about multiple slashes here because of |
| * no2slash() below... |
| */ |
| |
| lastp = d + strlen(d) - 1; |
| if (lastp == d) |
| return OK; /* Root directory, '/' */ |
| |
| if (*lastp == '/') |
| *lastp = '\0'; |
| else |
| lastp = NULL; |
| |
| res = apr_lstat(&lfi, d, APR_FINFO_TYPE | APR_FINFO_OWNER, p); |
| |
| if (lastp) |
| *lastp = '/'; |
| |
| /* |
| * Note that we don't reject accesses to nonexistent files (multiviews or |
| * the like may cons up a way to run the transaction anyway)... |
| */ |
| |
| if ((res != APR_SUCCESS && res != APR_INCOMPLETE) |
| || (lfi.filetype != APR_LNK)) |
| return OK; |
| |
| /* OK, it's a symlink. May still be OK with OPT_SYM_OWNER */ |
| |
| if (!(opts & OPT_SYM_OWNER)) |
| return HTTP_FORBIDDEN; |
| |
| /* OPT_SYM_OWNER only works if we can get the owner from the file */ |
| |
| if (res != APR_SUCCESS) |
| return HTTP_FORBIDDEN; |
| |
| if (apr_stat(&fi, d, APR_FINFO_OWNER, p) != APR_SUCCESS) |
| return HTTP_FORBIDDEN; |
| |
| /* TODO: replace with an apr_compare_users() fn */ |
| return (fi.user == lfi.user) ? OK : HTTP_FORBIDDEN; |
| |
| #endif |
| } |
| |
| /* Dealing with the file system to get PATH_INFO |
| */ |
| static int get_path_info(request_rec *r) |
| { |
| char *cp; |
| char *path = r->filename; |
| char *end = &path[strlen(path)]; |
| char *last_cp = NULL; |
| int rv; |
| #if defined(HAVE_DRIVE_LETTERS) || defined(HAVE_UNC_PATHS) |
| char bStripSlash=1; |
| #endif |
| |
| if (r->finfo.filetype) { |
| /* assume path_info already set */ |
| return OK; |
| } |
| |
| #ifdef HAVE_DRIVE_LETTERS |
| /* If the directory is x:\, then we don't want to strip |
| * the trailing slash since x: is not a valid directory. |
| */ |
| if (strlen(path) == 3 && path[1] == ':' && path[2] == '/') |
| bStripSlash = 0; |
| #endif |
| |
| #ifdef HAVE_UNC_PATHS |
| /* If UNC name == //machine/share/, do not |
| * advance over the trailing slash. Any other |
| * UNC name is OK to strip the slash. |
| */ |
| cp = end; |
| if (path[0] == '/' && path[1] == '/' && |
| path[2] != '/' && cp[-1] == '/') { |
| char *p; |
| int iCount=0; |
| p = path; |
| while ((p = strchr(p,'/')) != NULL) { |
| p++; |
| iCount++; |
| } |
| |
| if (iCount == 4) |
| bStripSlash = 0; |
| } |
| #endif |
| |
| #if defined(HAVE_DRIVE_LETTERS) || defined(HAVE_UNC_PATHS) |
| if (bStripSlash) |
| #endif |
| /* Advance over trailing slashes ... NOT part of filename |
| * if file is not a UNC name (Win32 only). |
| */ |
| for (cp = end; cp > path && cp[-1] == '/'; --cp) |
| continue; |
| |
| while (cp > path) { |
| |
| /* See if the pathname ending here exists... */ |
| *cp = '\0'; |
| |
| /* ### We no longer need the test ap_os_is_filename_valid() here |
| * since apr_stat isn't a posix thing - it's apr_stat's responsibility |
| * to handle whatever path string arrives at it's door - by platform |
| * and volume restrictions as applicable... |
| * TODO: This code becomes even simpler if apr_stat grows |
| * an APR_PATHINCOMPLETE result to indicate that we are staring at |
| * an partial virtual root. Only OS2/Win32/Netware need apply it :-) |
| */ |
| rv = apr_stat(&r->finfo, path, APR_FINFO_MIN, r->pool); |
| |
| if (cp != end) |
| *cp = '/'; |
| |
| if (rv == APR_SUCCESS || rv == APR_INCOMPLETE) { |
| /* |
| * Aha! Found something. If it was a directory, we will search |
| * contents of that directory for a multi_match, so the PATH_INFO |
| * argument starts with the component after that. |
| */ |
| if (r->finfo.filetype == APR_DIR && last_cp) { |
| r->finfo.filetype = APR_NOFILE; /* No such file... */ |
| cp = last_cp; |
| } |
| |
| r->path_info = apr_pstrdup(r->pool, cp); |
| *cp = '\0'; |
| return OK; |
| } |
| |
| if (APR_STATUS_IS_ENOENT(rv) || APR_STATUS_IS_ENOTDIR(rv)) { |
| last_cp = cp; |
| |
| while (--cp > path && *cp != '/') |
| continue; |
| |
| while (cp > path && cp[-1] == '/') |
| --cp; |
| } |
| else { |
| if (APR_STATUS_IS_EACCES(rv)) |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, |
| "access to %s denied", r->uri); |
| else |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, |
| "access to %s failed", r->uri); |
| return HTTP_FORBIDDEN; |
| } |
| } |
| return OK; |
| } |
| |
| AP_DECLARE(int) directory_walk(request_rec *r) |
| { |
| core_server_config *sconf = ap_get_module_config(r->server->module_config, |
| &core_module); |
| ap_conf_vector_t *per_dir_defaults = r->server->lookup_defaults; |
| ap_conf_vector_t **sec = (ap_conf_vector_t **) sconf->sec->elts; |
| int num_sec = sconf->sec->nelts; |
| char *test_filename; |
| char *test_dirname; |
| int res; |
| unsigned i, num_dirs; |
| int j, test_filename_len; |
| #if defined(HAVE_UNC_PATHS) || defined(NETWARE) |
| unsigned iStart = 1; |
| #endif |
| ap_conf_vector_t *entry_config; |
| ap_conf_vector_t *this_conf; |
| core_dir_config *entry_core; |
| |
| /* |
| * Are we dealing with a file? If not, we can (hopefuly) safely assume we |
| * have a handler that doesn't require one, but for safety's sake, and so |
| * we have something find_types() can get something out of, fake one. But |
| * don't run through the directory entries. |
| */ |
| |
| if (r->filename == NULL) { |
| r->filename = apr_pstrdup(r->pool, r->uri); |
| r->finfo.filetype = APR_NOFILE; |
| r->per_dir_config = per_dir_defaults; |
| |
| return OK; |
| } |
| |
| /* |
| * 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. If either of these things fails, we could poke |
| * around, see why, and adjust the lookup_rec accordingly --- this might |
| * save us a call to get_path_info (with the attendant stat()s); however, |
| * for the moment, that's not worth the trouble. |
| * |
| * Fake filenames (i.e. proxy:) only match Directory sections. |
| */ |
| |
| if (!ap_os_is_path_absolute(r->filename)) |
| { |
| const char *entry_dir; |
| |
| for (j = 0; j < num_sec; ++j) { |
| |
| entry_config = sec[j]; |
| entry_core = ap_get_module_config(entry_config, &core_module); |
| entry_dir = entry_core->d; |
| |
| this_conf = NULL; |
| if (entry_core->r) { |
| if (!ap_regexec(entry_core->r, r->filename, 0, NULL, 0)) |
| this_conf = entry_config; |
| } |
| else if (entry_core->d_is_fnmatch) { |
| if (!apr_fnmatch(entry_dir, r->filename, 0)) |
| this_conf = entry_config; |
| } |
| else if (!strncmp(r->filename, entry_dir, strlen(entry_dir))) |
| this_conf = entry_config; |
| |
| if (this_conf) |
| per_dir_defaults = ap_merge_per_dir_configs(r->pool, |
| per_dir_defaults, |
| this_conf); |
| } |
| |
| r->per_dir_config = per_dir_defaults; |
| |
| return OK; |
| } |
| |
| /* XXX This needs to be rolled into APR, the APR function will not |
| * be allowed to fold the case of any non-existant segment of the path: |
| */ |
| r->filename = ap_os_case_canonical_filename(r->pool, r->filename); |
| |
| /* TODO This is rather silly right here, we should simply be setting |
| * filename and path_info at the end of our directory_walk |
| */ |
| res = get_path_info(r); |
| if (res != OK) { |
| return res; |
| } |
| |
| /* XXX This becomes moot, and will already happen above for elements |
| * that actually exist: |
| */ |
| r->filename = ap_os_canonical_filename(r->pool, r->filename); |
| |
| test_filename = apr_pstrdup(r->pool, r->filename); |
| |
| /* XXX This becomes mute, since the APR canonical parsing will handle |
| * 2slash and dot directory issues: |
| */ |
| ap_no2slash(test_filename); |
| num_dirs = ap_count_dirs(test_filename); |
| |
| /* XXX This needs to be rolled into APR: */ |
| if ((res = check_safe_file(r))) { |
| return res; |
| } |
| |
| test_filename_len = strlen(test_filename); |
| if (test_filename[test_filename_len - 1] == '/') |
| --num_dirs; |
| |
| if (r->finfo.filetype == APR_DIR) |
| ++num_dirs; |
| |
| /* |
| * We will use test_dirname as scratch space while we build directory |
| * names during the walk. Profiling shows directory_walk to be a busy |
| * function so we try to avoid allocating lots of extra memory here. |
| * We need 2 extra bytes, one for trailing \0 and one because |
| * make_dirstr_prefix will add potentially one extra /. |
| */ |
| test_dirname = apr_palloc(r->pool, test_filename_len + 2); |
| |
| /* XXX These exception cases go away if apr_stat() returns the |
| * APR_PATHINCOMPLETE status, so we skip hard filesystem testing |
| * of the initial 'pseudo' elements: |
| */ |
| |
| #if defined(HAVE_UNC_PATHS) |
| /* If the name is a UNC name, then do not perform any true file test |
| * against the machine name (start at //machine/share/) |
| * This is optimized to use the normal walk (skips the redundant '/' root) |
| */ |
| if (num_dirs > 3 && test_filename[0] == '/' && test_filename[1] == '/') |
| iStart = 4; |
| #endif |
| |
| #if defined(NETWARE) |
| /* If the name is a fully qualified volume name, then do not perform any |
| * true file test on the machine name (start at machine/share:/) |
| * XXX: The implementation eludes me at this moment... |
| * Does this make sense? Please test! |
| */ |
| if (num_dirs > 1 && strchr(test_filename, '/') < strchr(test_filename, ':')) |
| iStart = 2; |
| #endif |
| |
| #if defined(HAVE_DRIVE_LETTERS) || defined(NETWARE) |
| /* Should match <Directory> sections starting from '/', not 'e:/' |
| * (for example). WIN32/OS2/NETWARE do not have a single root directory, |
| * they have one for each filesystem. Traditionally, Apache has treated |
| * <Directory /> permissions as the base for the whole server, and this |
| * tradition should probably be preserved. |
| * |
| * NOTE: MUST SYNC WITH ap_make_dirstr_prefix() CHANGE IN src/main/util.c |
| */ |
| if (test_filename[0] == '/') |
| i = 1; |
| else |
| i = 0; |
| #else |
| /* Normal File Systems are rooted at / */ |
| i = 1; |
| #endif /* def HAVE_DRIVE_LETTERS || NETWARE */ |
| |
| /* j keeps track of which section we're on, see core_reorder_directories */ |
| j = 0; |
| for (; i <= num_dirs; ++i) { |
| int overrides_here; |
| core_dir_config *core_dir = ap_get_module_config(per_dir_defaults, |
| &core_module); |
| |
| /* |
| * XXX: this could be made faster by only copying the next component |
| * rather than copying the entire thing all over. |
| */ |
| ap_make_dirstr_prefix(test_dirname, test_filename, i); |
| |
| /* |
| * Do symlink checks first, because they are done with the |
| * permissions appropriate to the *parent* directory... |
| */ |
| |
| #if defined(HAVE_UNC_PATHS) || defined(NETWARE) |
| /* Test only legal names against the real filesystem */ |
| if (i >= iStart) |
| #endif |
| if ((res = check_symlinks(test_dirname, core_dir->opts, r->pool))) { |
| ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r, |
| "Symbolic link not allowed: %s", test_dirname); |
| return res; |
| } |
| |
| /* |
| * Begin *this* level by looking for matching <Directory> sections |
| * from access.conf. |
| */ |
| |
| for (; j < num_sec; ++j) { |
| char *entry_dir; |
| |
| entry_config = sec[j]; |
| entry_core = ap_get_module_config(entry_config, &core_module); |
| entry_dir = entry_core->d; |
| |
| if (entry_core->r |
| || !ap_os_is_path_absolute(entry_dir) |
| #if defined(HAVE_DRIVE_LETTERS) || defined(NETWARE) |
| /* To account for the top-level "/" directory when i == 0 |
| * XXX: The net test may be wrong... may fail ap_os_is_path_absolute |
| */ |
| || (entry_core->d_components > 1 |
| && entry_core->d_components > i) |
| #else |
| || entry_core->d_components > i |
| #endif /* def HAVE_DRIVE_LETTERS || NETWARE */ |
| ) |
| break; |
| |
| this_conf = NULL; |
| if (entry_core->d_is_fnmatch) { |
| if (!apr_fnmatch(entry_dir, test_dirname, FNM_PATHNAME)) { |
| this_conf = entry_config; |
| } |
| } |
| else if (!strcmp(test_dirname, entry_dir)) |
| this_conf = entry_config; |
| |
| if (this_conf) { |
| per_dir_defaults = ap_merge_per_dir_configs(r->pool, |
| per_dir_defaults, |
| this_conf); |
| core_dir = ap_get_module_config(per_dir_defaults, |
| &core_module); |
| } |
| #if defined(HAVE_DRIVE_LETTERS) || defined(NETWARE) |
| /* So that other top-level directory sections (e.g. "e:/") aren't |
| * skipped when i == 0 |
| * XXX: I don't get you here, Tim... That's a level 1 section, but |
| * we are at level 0. Did you mean fast-forward to the next? |
| */ |
| else if (!i) |
| break; |
| #endif /* def HAVE_DRIVE_LETTERS || NETWARE */ |
| } |
| overrides_here = core_dir->override; |
| |
| /* If .htaccess files are enabled, check for one. */ |
| |
| #if defined(HAVE_UNC_PATHS) || defined(NETWARE) |
| /* Test only legal names against the real filesystem */ |
| if (i >= iStart) |
| #endif |
| if (overrides_here) { |
| ap_conf_vector_t *htaccess_conf = NULL; |
| |
| res = ap_parse_htaccess(&htaccess_conf, r, overrides_here, |
| apr_pstrdup(r->pool, test_dirname), |
| sconf->access_name); |
| if (res) |
| return res; |
| |
| if (htaccess_conf) { |
| per_dir_defaults = ap_merge_per_dir_configs(r->pool, |
| per_dir_defaults, |
| htaccess_conf); |
| r->per_dir_config = per_dir_defaults; |
| } |
| } |
| } |
| |
| /* |
| * There's two types of IS_SPECIAL sections (see http_core.c), and we've |
| * already handled the proxy:-style stuff. Now we'll deal with the |
| * regexes. |
| */ |
| for (; j < num_sec; ++j) { |
| |
| entry_config = sec[j]; |
| entry_core = ap_get_module_config(entry_config, &core_module); |
| |
| if (entry_core->r) { |
| if (!ap_regexec(entry_core->r, test_dirname, 0, NULL, REG_NOTEOL)) { |
| per_dir_defaults = ap_merge_per_dir_configs(r->pool, |
| per_dir_defaults, |
| entry_config); |
| } |
| } |
| } |
| r->per_dir_config = per_dir_defaults; |
| |
| /* |
| * Symlink permissions are determined by the parent. If the request is |
| * for a directory then applying the symlink test here would use the |
| * permissions of the directory as opposed to its parent. Consider a |
| * symlink pointing to a dir with a .htaccess disallowing symlinks. If |
| * you access /symlink (or /symlink/) you would get a 403 without this |
| * S_ISDIR test. But if you accessed /symlink/index.html, for example, |
| * you would *not* get the 403. |
| */ |
| if (r->finfo.filetype != APR_DIR |
| && (res = check_symlinks(r->filename, ap_allow_options(r), r->pool))) { |
| ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r, |
| "Symbolic link not allowed: %s", r->filename); |
| return res; |
| } |
| return OK; /* Can only "fail" if access denied by the |
| * symlink goop. */ |
| } |
| |
| AP_DECLARE(int) location_walk(request_rec *r) |
| { |
| core_server_config *sconf = ap_get_module_config(r->server->module_config, |
| &core_module); |
| ap_conf_vector_t *per_dir_defaults = r->per_dir_config; |
| ap_conf_vector_t **url = (ap_conf_vector_t **) sconf->sec_url->elts; |
| int len, num_url = sconf->sec_url->nelts; |
| char *test_location; |
| ap_conf_vector_t *this_conf; |
| ap_conf_vector_t *entry_config; |
| core_dir_config *entry_core; |
| char *entry_url; |
| int j; |
| |
| if (!num_url) { |
| return OK; |
| } |
| |
| /* 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] != '/') { |
| test_location = r->uri; |
| } |
| else { |
| test_location = apr_pstrdup(r->pool, r->uri); |
| ap_no2slash(test_location); |
| } |
| |
| /* Go through the location entries, and check for matches. */ |
| |
| /* we apply the directive sections in some order; |
| * should really try them with the most general first. |
| */ |
| for (j = 0; j < num_url; ++j) { |
| |
| entry_config = url[j]; |
| |
| entry_core = ap_get_module_config(entry_config, &core_module); |
| entry_url = entry_core->d; |
| |
| len = strlen(entry_url); |
| |
| this_conf = NULL; |
| |
| if (entry_core->r) { |
| if (!ap_regexec(entry_core->r, r->uri, 0, NULL, 0)) |
| this_conf = entry_config; |
| } |
| else if (entry_core->d_is_fnmatch) { |
| if (!apr_fnmatch(entry_url, test_location, FNM_PATHNAME)) { |
| this_conf = entry_config; |
| } |
| } |
| else if (!strncmp(test_location, entry_url, len) && |
| (entry_url[len - 1] == '/' || |
| test_location[len] == '/' || test_location[len] == '\0')) |
| this_conf = entry_config; |
| |
| if (this_conf) |
| per_dir_defaults = ap_merge_per_dir_configs(r->pool, |
| per_dir_defaults, |
| this_conf); |
| } |
| r->per_dir_config = per_dir_defaults; |
| |
| return OK; |
| } |
| |
| AP_DECLARE(int) file_walk(request_rec *r) |
| { |
| core_dir_config *conf = ap_get_module_config(r->per_dir_config, |
| &core_module); |
| ap_conf_vector_t *per_dir_defaults = r->per_dir_config; |
| ap_conf_vector_t **file = (ap_conf_vector_t **) conf->sec->elts; |
| int num_files = conf->sec->nelts; |
| char *test_file; |
| |
| /* get the basename */ |
| test_file = strrchr(r->filename, '/'); |
| if (test_file == NULL) { |
| test_file = r->filename; |
| } |
| else { |
| ++test_file; |
| } |
| |
| /* Go through the file entries, and check for matches. */ |
| |
| if (num_files) { |
| ap_conf_vector_t *this_conf; |
| ap_conf_vector_t *entry_config; |
| core_dir_config *entry_core; |
| char *entry_file; |
| int j; |
| |
| /* we apply the directive sections in some order; |
| * should really try them with the most general first. |
| */ |
| for (j = 0; j < num_files; ++j) { |
| |
| entry_config = file[j]; |
| |
| entry_core = ap_get_module_config(entry_config, &core_module); |
| entry_file = entry_core->d; |
| |
| this_conf = NULL; |
| |
| if (entry_core->r) { |
| if (!ap_regexec(entry_core->r, test_file, 0, NULL, 0)) |
| this_conf = entry_config; |
| } |
| else if (entry_core->d_is_fnmatch) { |
| if (!apr_fnmatch(entry_file, test_file, FNM_PATHNAME)) { |
| this_conf = entry_config; |
| } |
| } |
| else if (!strcmp(test_file, entry_file)) { |
| this_conf = entry_config; |
| } |
| |
| if (this_conf) |
| per_dir_defaults = ap_merge_per_dir_configs(r->pool, |
| per_dir_defaults, |
| this_conf); |
| } |
| r->per_dir_config = per_dir_defaults; |
| } |
| 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) |
| { |
| apr_pool_t *rrp; |
| request_rec *rr; |
| |
| apr_pool_create(&rrp, r->pool); |
| rr = apr_pcalloc(rrp, sizeof(request_rec)); |
| rr->pool = rrp; |
| return rr; |
| } |
| |
| 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); |
| } |
| 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 & (1 << r->method_number)) |
| return 1; |
| |
| return 0; |
| } |
| |
| AP_DECLARE(request_rec *) ap_sub_req_method_uri(const char *method, |
| const char *new_file, |
| const request_rec *r, |
| ap_filter_t *next_filter) |
| { |
| request_rec *rnew; |
| int res; |
| char *udir; |
| |
| rnew = make_sub_request(r); |
| 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); |
| ap_set_module_config(rnew->request_config, &core_module, |
| ap_get_module_config(r->request_config, &core_module)); |
| |
| rnew->htaccess = r->htaccess; |
| rnew->per_dir_config = r->server->lookup_defaults; |
| 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) { |
| rnew->output_filters = next_filter; |
| } |
| else { |
| rnew->output_filters = r->output_filters; |
| } |
| ap_add_output_filter("SUBREQ_CORE", NULL, rnew, rnew->connection); |
| |
| /* no input filters for a subrequest */ |
| |
| ap_set_sub_req_protocol(rnew, r); |
| |
| /* 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_file[0] == '/') |
| ap_parse_uri(rnew, new_file); |
| 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_file)); |
| } |
| |
| res = ap_unescape_url(rnew->uri); |
| if (res) { |
| rnew->status = res; |
| return rnew; |
| } |
| |
| ap_getparents(rnew->uri); |
| |
| if ((res = location_walk(rnew))) { |
| rnew->status = res; |
| return rnew; |
| } |
| |
| res = ap_run_translate_name(rnew); |
| if (res) { |
| rnew->status = res; |
| return rnew; |
| } |
| |
| /* |
| * We could be clever at this point, and avoid calling directory_walk, |
| * etc. However, we'd need to test that the old and new filenames contain |
| * the same directory components, so it would require duplicating the |
| * start of translate_name. Instead we rely on the cache of .htaccess |
| * results. |
| * |
| * NB: directory_walk() clears the per_dir_config, so we don't inherit |
| * from location_walk() above |
| */ |
| |
| if ((res = directory_walk(rnew)) |
| || (res = file_walk(rnew)) |
| || (res = location_walk(rnew)) |
| || ((ap_satisfies(rnew) == SATISFY_ALL |
| || ap_satisfies(rnew) == SATISFY_NOSPEC) |
| ? ((res = ap_run_access_checker(rnew)) |
| || (ap_some_auth_required(rnew) |
| && ((res = ap_run_check_user_id(rnew)) |
| || (res = ap_run_auth_checker(rnew))))) |
| : ((res = ap_run_access_checker(rnew)) |
| && (!ap_some_auth_required(rnew) |
| || ((res = ap_run_check_user_id(rnew)) |
| || (res = ap_run_auth_checker(rnew))))) |
| ) |
| || (res = ap_run_type_checker(rnew)) |
| || (res = ap_run_fixups(rnew)) |
| ) { |
| rnew->status = res; |
| } |
| return rnew; |
| } |
| |
| AP_DECLARE(request_rec *) ap_sub_req_lookup_uri(const char *new_file, |
| const request_rec *r, |
| ap_filter_t *next_filter) |
| { |
| return ap_sub_req_method_uri("GET", new_file, r, next_filter); |
| } |
| |
| 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; |
| |
| rnew = make_sub_request(r); |
| 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); |
| ap_set_module_config(rnew->request_config, &core_module, |
| ap_get_module_config(r->request_config, &core_module)); |
| |
| rnew->htaccess = r->htaccess; |
| rnew->chunked = r->chunked; |
| 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) { |
| rnew->output_filters = next_filter; |
| } |
| else { |
| rnew->output_filters = r->output_filters; |
| } |
| ap_add_output_filter("SUBREQ_CORE", NULL, rnew, rnew->connection); |
| |
| /* no input filters for a subrequest */ |
| |
| ap_set_sub_req_protocol(rnew, r); |
| fdir = ap_make_dirstr_parent(rnew->pool, r->filename); |
| |
| /* |
| * Check for a special case... if there are no '/' characters in new_file |
| * at all, then we are looking at a relative lookup in the same |
| * directory. That means we won't have to redo directory_walk, and we may |
| * not even have to redo access checks. |
| */ |
| |
| if (ap_strchr_c(new_file, '/') == NULL) { |
| char *udir = ap_make_dirstr_parent(rnew->pool, r->uri); |
| apr_status_t rv; |
| |
| rnew->uri = ap_make_full_path(rnew->pool, udir, new_file); |
| rnew->filename = ap_make_full_path(rnew->pool, fdir, new_file); |
| ap_parse_uri(rnew, rnew->uri); /* fill in parsed_uri values */ |
| |
| if (((rv = apr_stat(&rnew->finfo, rnew->filename, |
| APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS) |
| && (rv != APR_INCOMPLETE)) { |
| rnew->finfo.filetype = 0; |
| } |
| |
| if ((res = check_safe_file(rnew))) { |
| rnew->status = res; |
| return rnew; |
| } |
| |
| rnew->per_dir_config = r->per_dir_config; |
| |
| /* |
| * no matter what, if it's a subdirectory, we need to re-run |
| * directory_walk |
| */ |
| if (rnew->finfo.filetype == APR_DIR) { |
| res = directory_walk(rnew); |
| if (!res) { |
| res = file_walk(rnew); |
| } |
| } |
| else { |
| if ((res = check_symlinks(rnew->filename, ap_allow_options(rnew), |
| rnew->pool))) { |
| ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, rnew, |
| "Symbolic link not allowed: %s", rnew->filename); |
| rnew->status = res; |
| return rnew; |
| } |
| /* |
| * do a file_walk, if it doesn't change the per_dir_config then |
| * we know that we don't have to redo all the access checks |
| */ |
| if ((res = file_walk(rnew))) { |
| rnew->status = res; |
| return rnew; |
| } |
| if (rnew->per_dir_config == r->per_dir_config) { |
| if ((res = ap_run_type_checker(rnew)) || (res = ap_run_fixups(rnew))) { |
| rnew->status = res; |
| } |
| return rnew; |
| } |
| } |
| } |
| else { |
| /* XXX: @@@: What should be done with the parsed_uri values? */ |
| 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 = "INTERNALLY GENERATED file-relative req"; |
| rnew->filename = ((ap_os_is_path_absolute(new_file)) ? |
| apr_pstrdup(rnew->pool, new_file) : |
| ap_make_full_path(rnew->pool, fdir, new_file)); |
| rnew->per_dir_config = r->server->lookup_defaults; |
| res = directory_walk(rnew); |
| if (!res) { |
| res = file_walk(rnew); |
| } |
| } |
| |
| if (res |
| || ((ap_satisfies(rnew) == SATISFY_ALL |
| || ap_satisfies(rnew) == SATISFY_NOSPEC) |
| ? ((res = ap_run_access_checker(rnew)) |
| || (ap_some_auth_required(rnew) |
| && ((res = ap_run_check_user_id(rnew)) |
| || (res = ap_run_auth_checker(rnew))))) |
| : ((res = ap_run_access_checker(rnew)) |
| && (!ap_some_auth_required(rnew) |
| || ((res = ap_run_check_user_id(rnew)) |
| || (res = ap_run_auth_checker(rnew))))) |
| ) |
| || (res = ap_run_type_checker(rnew)) |
| || (res = ap_run_fixups(rnew)) |
| ) { |
| rnew->status = res; |
| } |
| return rnew; |
| } |
| |
| AP_DECLARE(int) ap_run_sub_req(request_rec *r) |
| { |
| int retval; |
| |
| /* see comments in process_request_internal() */ |
| ap_run_insert_filter(r); |
| retval = ap_invoke_handler(r); |
| 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 */ |
| } |
| |
