| /* ==================================================================== |
| * Copyright (c) 1995-1999 The Apache Group. 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. All advertising materials mentioning features or use of this |
| * software must display the following acknowledgment: |
| * "This product includes software developed by the Apache Group |
| * for use in the Apache HTTP server project (http://www.apache.org/)." |
| * |
| * 4. The names "Apache Server" and "Apache Group" 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 names without prior written |
| * permission of the Apache Group. |
| * |
| * 6. Redistributions of any form whatsoever must retain the following |
| * acknowledgment: |
| * "This product includes software developed by the Apache Group |
| * for use in the Apache HTTP server project (http://www.apache.org/)." |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``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 GROUP 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 Group and was originally based |
| * on public domain software written at the National Center for |
| * Supercomputing Applications, University of Illinois, Urbana-Champaign. |
| * For more information on the Apache Group and the Apache HTTP server |
| * project, please see <http://www.apache.org/>. |
| * |
| */ |
| |
| /* |
| * 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. |
| * |
| */ |
| |
| #define CORE_PRIVATE |
| #include "httpd.h" |
| #include "http_config.h" |
| #include "http_request.h" |
| #include "http_core.h" |
| #include "http_protocol.h" |
| #include "http_conf_globals.h" /* for ap_extended_status */ |
| #include "http_log.h" |
| #include "http_main.h" |
| #include "scoreboard.h" |
| #include "fnmatch.h" |
| |
| /***************************************************************** |
| * |
| * 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.st_mode == 0 /* doesn't exist */ |
| || S_ISDIR(r->finfo.st_mode) |
| || S_ISREG(r->finfo.st_mode) |
| || S_ISLNK(r->finfo.st_mode)) { |
| return OK; |
| } |
| ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r, |
| "object is not a file, directory or symlink: %s", |
| r->filename); |
| return HTTP_FORBIDDEN; |
| } |
| |
| |
| static int check_symlinks(char *d, int opts) |
| { |
| #if defined(OS2) || defined(WIN32) |
| /* OS/2 doesn't have symlinks */ |
| return OK; |
| #else |
| struct stat 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 = lstat(d, &lfi); |
| |
| 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 >= 0) || !S_ISLNK(lfi.st_mode)) |
| return OK; |
| |
| /* OK, it's a symlink. May still be OK with OPT_SYM_OWNER */ |
| |
| if (!(opts & OPT_SYM_OWNER)) |
| return HTTP_FORBIDDEN; |
| |
| if (stat(d, &fi) < 0) |
| return HTTP_FORBIDDEN; |
| |
| return (fi.st_uid == lfi.st_uid) ? 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; |
| #ifdef HAVE_DRIVE_LETTERS |
| char bStripSlash=1; |
| #endif |
| |
| if (r->finfo.st_mode) { |
| /* 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; |
| |
| |
| /* 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 (strlen(path) > 2 && path[0] == '/' && path[1] == '/' && |
| path[2] != '/' && cp[-1] == '/') { |
| char *p; |
| int iCount=0; |
| p = path; |
| while (p = strchr(p,'/')) { |
| p++; |
| iCount++; |
| } |
| |
| if (iCount == 4) |
| bStripSlash = 0; |
| } |
| |
| 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 must not stat() filenames that may cause os-specific system |
| * problems, such as "/file/aux" on DOS-abused filesystems. |
| * So pretend that they do not exist by returning an ENOENT error. |
| * This will force us to drop that part of the path and keep |
| * looking back for a "real" file that exists, while still allowing |
| * the "invalid" path parts within the PATH_INFO. |
| */ |
| if (!ap_os_is_filename_valid(path)) { |
| errno = ENOENT; |
| rv = -1; |
| } |
| else { |
| errno = 0; |
| rv = stat(path, &r->finfo); |
| } |
| |
| if (cp != end) |
| *cp = '/'; |
| |
| if (!rv) { |
| |
| /* |
| * 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 (S_ISDIR(r->finfo.st_mode) && last_cp) { |
| r->finfo.st_mode = 0; /* No such file... */ |
| cp = last_cp; |
| } |
| |
| r->path_info = ap_pstrdup(r->pool, cp); |
| *cp = '\0'; |
| return OK; |
| } |
| /* must set this to zero, some stat()s may have corrupted it |
| * even if they returned an error. |
| */ |
| r->finfo.st_mode = 0; |
| #if defined(ENOENT) && defined(ENOTDIR) |
| if (errno == ENOENT || errno == ENOTDIR) { |
| last_cp = cp; |
| |
| while (--cp > path && *cp != '/') |
| continue; |
| |
| while (cp > path && cp[-1] == '/') |
| --cp; |
| } |
| else { |
| #if defined(EACCES) |
| if (errno != EACCES) |
| #endif |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, r, |
| "access to %s failed", r->uri); |
| return HTTP_FORBIDDEN; |
| } |
| #else |
| #error ENOENT || ENOTDIR not defined; please see the |
| #error comments at this line in the source for a workaround. |
| /* |
| * If ENOENT || ENOTDIR is not defined in one of the your OS's |
| * include files, Apache does not know how to check to see why the |
| * stat() of the index file failed; there are cases where it can fail |
| * even though the file exists. This means that it is possible for |
| * someone to get a directory listing of a directory even though |
| * there is an index (eg. index.html) file in it. If you do not have |
| * a problem with this, delete the above #error lines and start the |
| * compile again. If you need to do this, please submit a bug report |
| * from http://www.apache.org/bug_report.html letting us know that |
| * you needed to do this. Please be sure to include the operating |
| * system you are using. |
| */ |
| last_cp = cp; |
| |
| while (--cp > path && *cp != '/') |
| continue; |
| |
| while (cp > path && cp[-1] == '/') |
| --cp; |
| #endif /* ENOENT && ENOTDIR */ |
| } |
| return OK; |
| } |
| |
| static int directory_walk(request_rec *r) |
| { |
| core_server_config *sconf = ap_get_module_config(r->server->module_config, |
| &core_module); |
| void *per_dir_defaults = r->server->lookup_defaults; |
| void **sec = (void **) sconf->sec->elts; |
| int num_sec = sconf->sec->nelts; |
| char *test_filename; |
| char *test_dirname; |
| int res; |
| unsigned i, num_dirs, iStart; |
| int j, test_filename_len; |
| |
| /* |
| * 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 = ap_pstrdup(r->pool, r->uri); |
| r->finfo.st_mode = 0; /* Not really a file... */ |
| 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)) |
| { |
| void *this_conf, *entry_config; |
| core_dir_config *entry_core; |
| char *entry_dir; |
| |
| for (j = 0; j < num_sec; ++j) { |
| |
| entry_config = sec[j]; |
| |
| entry_core = (core_dir_config *) |
| 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 (!ap_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; |
| } |
| |
| r->filename = ap_os_case_canonical_filename(r->pool, r->filename); |
| |
| res = get_path_info(r); |
| if (res != OK) { |
| return res; |
| } |
| |
| r->filename = ap_os_canonical_filename(r->pool, r->filename); |
| |
| test_filename = ap_pstrdup(r->pool, r->filename); |
| |
| ap_no2slash(test_filename); |
| num_dirs = ap_count_dirs(test_filename); |
| |
| if (!ap_os_is_filename_valid(r->filename)) { |
| ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r, |
| "Filename is not valid: %s", r->filename); |
| return HTTP_FORBIDDEN; |
| } |
| |
| if ((res = check_safe_file(r))) { |
| return res; |
| } |
| |
| test_filename_len = strlen(test_filename); |
| if (test_filename[test_filename_len - 1] == '/') |
| --num_dirs; |
| |
| if (S_ISDIR(r->finfo.st_mode)) |
| ++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 = ap_palloc(r->pool, test_filename_len + 2); |
| |
| iStart = 1; |
| #ifdef WIN32 |
| /* If the name is a UNC name, then do not walk through the |
| * machine and share name (e.g. \\machine\share\) |
| */ |
| if (num_dirs > 3 && test_filename[0] == '/' && test_filename[1] == '/') |
| iStart = 4; |
| #endif |
| |
| /* j keeps track of which section we're on, see core_reorder_directories */ |
| j = 0; |
| for (i = iStart; i <= num_dirs; ++i) { |
| int overrides_here; |
| core_dir_config *core_dir = (core_dir_config *) |
| 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 ((res = check_symlinks(test_dirname, core_dir->opts))) { |
| ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 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) { |
| void *entry_config = sec[j]; |
| core_dir_config *entry_core; |
| char *entry_dir; |
| void *this_conf; |
| |
| entry_core = (core_dir_config *) |
| ap_get_module_config(entry_config, &core_module); |
| entry_dir = entry_core->d; |
| |
| if (entry_core->r |
| || !ap_os_is_path_absolute(entry_dir) |
| || entry_core->d_components > i) |
| break; |
| |
| this_conf = NULL; |
| if (entry_core->d_is_fnmatch) { |
| if (!ap_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 = (core_dir_config *) |
| ap_get_module_config(per_dir_defaults, &core_module); |
| } |
| } |
| overrides_here = core_dir->override; |
| |
| /* If .htaccess files are enabled, check for one. */ |
| |
| if (overrides_here) { |
| void *htaccess_conf = NULL; |
| |
| res = ap_parse_htaccess(&htaccess_conf, r, overrides_here, |
| ap_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) { |
| void *entry_config = sec[j]; |
| core_dir_config *entry_core; |
| |
| entry_core = (core_dir_config *) |
| 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 (!S_ISDIR(r->finfo.st_mode) |
| && (res = check_symlinks(r->filename, ap_allow_options(r)))) { |
| ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r, |
| "Symbolic link not allowed: %s", r->filename); |
| return res; |
| } |
| return OK; /* Can only "fail" if access denied by the |
| * symlink goop. */ |
| } |
| |
| static int location_walk(request_rec *r) |
| { |
| core_server_config *sconf = ap_get_module_config(r->server->module_config, |
| &core_module); |
| void *per_dir_defaults = r->per_dir_config; |
| void **url = (void **) sconf->sec_url->elts; |
| int len, num_url = sconf->sec_url->nelts; |
| char *test_location; |
| void *this_conf, *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 = ap_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 = (core_dir_config *) |
| 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 (!ap_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; |
| } |
| |
| static int file_walk(request_rec *r) |
| { |
| core_dir_config *conf = ap_get_module_config(r->per_dir_config, &core_module); |
| void *per_dir_defaults = r->per_dir_config; |
| void **file = (void **) 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) { |
| void *this_conf, *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 = (core_dir_config *) |
| 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 (!ap_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) |
| { |
| pool *rrp = ap_make_sub_pool(r->pool); |
| request_rec *rr = ap_pcalloc(rrp, sizeof(request_rec)); |
| |
| rr->pool = rrp; |
| return rr; |
| } |
| |
| API_EXPORT(request_rec *) ap_sub_req_method_uri(const char *method, |
| const char *new_file, |
| const request_rec *r) |
| { |
| 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); |
| rnew->htaccess = r->htaccess; |
| rnew->per_dir_config = r->server->lookup_defaults; |
| |
| 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_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_check_access(rnew)) |
| || (ap_some_auth_required(rnew) |
| && ((res = ap_check_user_id(rnew)) |
| || (res = ap_check_auth(rnew))))) |
| : ((res = ap_check_access(rnew)) |
| && (!ap_some_auth_required(rnew) |
| || ((res = ap_check_user_id(rnew)) |
| || (res = ap_check_auth(rnew))))) |
| ) |
| || (res = ap_find_types(rnew)) |
| || (res = ap_run_fixups(rnew)) |
| ) { |
| rnew->status = res; |
| } |
| return rnew; |
| } |
| |
| API_EXPORT(request_rec *) ap_sub_req_lookup_uri(const char *new_file, |
| const request_rec *r) |
| { |
| return ap_sub_req_method_uri("GET", new_file, r); |
| } |
| |
| API_EXPORT(request_rec *) ap_sub_req_lookup_file(const char *new_file, |
| const request_rec *r) |
| { |
| 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); |
| rnew->htaccess = r->htaccess; |
| |
| 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 (strchr(new_file, '/') == NULL) { |
| char *udir = ap_make_dirstr_parent(rnew->pool, r->uri); |
| |
| 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 (stat(rnew->filename, &rnew->finfo) < 0) { |
| rnew->finfo.st_mode = 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 (S_ISDIR(rnew->finfo.st_mode)) { |
| res = directory_walk(rnew); |
| if (!res) { |
| res = file_walk(rnew); |
| } |
| } |
| else { |
| if ((res = check_symlinks(rnew->filename, ap_allow_options(rnew)))) { |
| ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 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_find_types(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)) ? |
| ap_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_check_access(rnew)) |
| || (ap_some_auth_required(rnew) |
| && ((res = ap_check_user_id(rnew)) |
| || (res = ap_check_auth(rnew))))) |
| : ((res = ap_check_access(rnew)) |
| && (!ap_some_auth_required(rnew) |
| || ((res = ap_check_user_id(rnew)) |
| || (res = ap_check_auth(rnew))))) |
| ) |
| || (res = ap_find_types(rnew)) |
| || (res = ap_run_fixups(rnew)) |
| ) { |
| rnew->status = res; |
| } |
| return rnew; |
| } |
| |
| API_EXPORT(int) ap_run_sub_req(request_rec *r) |
| { |
| #ifndef CHARSET_EBCDIC |
| int retval = ap_invoke_handler(r); |
| #else /*CHARSET_EBCDIC*/ |
| /* Save the EBCDIC conversion setting of the caller across subrequests */ |
| int convert = ap_bgetflag(r->connection->client, B_EBCDIC2ASCII); |
| int retval = ap_invoke_handler(r); |
| ap_bsetflag(r->connection->client, B_EBCDIC2ASCII, convert); |
| #endif /*CHARSET_EBCDIC*/ |
| ap_finalize_sub_req_protocol(r); |
| return retval; |
| } |
| |
| API_EXPORT(void) ap_destroy_sub_req(request_rec *r) |
| { |
| /* Reclaim the space */ |
| ap_destroy_pool(r->pool); |
| } |
| |
| /***************************************************************** |
| * |
| * Mainline request processing... |
| */ |
| |
| API_EXPORT(void) ap_die(int type, request_rec *r) |
| { |
| int error_index = ap_index_of_response(type); |
| char *custom_response = ap_response_code_string(r, error_index); |
| int recursive_error = 0; |
| |
| if (type == DONE) { |
| ap_finalize_request_protocol(r); |
| return; |
| } |
| |
| /* |
| * The following takes care of Apache redirects to custom response URLs |
| * Note that if we are already dealing with the response to some other |
| * error condition, we just report on the original error, and give up on |
| * any attempt to handle the other thing "intelligently"... |
| */ |
| |
| if (r->status != HTTP_OK) { |
| recursive_error = type; |
| |
| while (r->prev && (r->prev->status != HTTP_OK)) |
| r = r->prev; /* Get back to original error */ |
| |
| type = r->status; |
| custom_response = NULL; /* Do NOT retry the custom thing! */ |
| } |
| |
| r->status = type; |
| |
| /* |
| * This test is done here so that none of the auth modules needs to know |
| * about proxy authentication. They treat it like normal auth, and then |
| * we tweak the status. |
| */ |
| if (r->status == AUTH_REQUIRED && r->proxyreq) { |
| r->status = HTTP_PROXY_AUTHENTICATION_REQUIRED; |
| } |
| |
| /* |
| * If we want to keep the connection, be sure that the request body |
| * (if any) has been read. |
| */ |
| if ((r->status != HTTP_NOT_MODIFIED) && (r->status != HTTP_NO_CONTENT) |
| && !ap_status_drops_connection(r->status) |
| && r->connection && (r->connection->keepalive != -1)) { |
| |
| (void) ap_discard_request_body(r); |
| } |
| |
| /* |
| * Two types of custom redirects --- plain text, and URLs. Plain text has |
| * a leading '"', so the URL code, here, is triggered on its absence |
| */ |
| |
| if (custom_response && custom_response[0] != '"') { |
| |
| if (ap_is_url(custom_response)) { |
| /* |
| * The URL isn't local, so lets drop through the rest of this |
| * apache code, and continue with the usual REDIRECT handler. |
| * But note that the client will ultimately see the wrong |
| * status... |
| */ |
| r->status = REDIRECT; |
| ap_table_setn(r->headers_out, "Location", custom_response); |
| } |
| else if (custom_response[0] == '/') { |
| const char *error_notes; |
| r->no_local_copy = 1; /* Do NOT send USE_LOCAL_COPY for |
| * error documents! */ |
| /* |
| * This redirect needs to be a GET no matter what the original |
| * method was. |
| */ |
| ap_table_setn(r->subprocess_env, "REQUEST_METHOD", r->method); |
| |
| /* |
| * Provide a special method for modules to communicate |
| * more informative (than the plain canned) messages to us. |
| * Propagate them to ErrorDocuments via the ERROR_NOTES variable: |
| */ |
| if ((error_notes = ap_table_get(r->notes, "error-notes")) != NULL) { |
| ap_table_setn(r->subprocess_env, "ERROR_NOTES", error_notes); |
| } |
| r->method = ap_pstrdup(r->pool, "GET"); |
| r->method_number = M_GET; |
| ap_internal_redirect(custom_response, r); |
| return; |
| } |
| else { |
| /* |
| * Dumb user has given us a bad url to redirect to --- fake up |
| * dying with a recursive server error... |
| */ |
| recursive_error = SERVER_ERROR; |
| ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r, |
| "Invalid error redirection directive: %s", |
| custom_response); |
| } |
| } |
| ap_send_error_response(r, recursive_error); |
| } |
| |
| static void decl_die(int status, char *phase, request_rec *r) |
| { |
| if (status == DECLINED) { |
| ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_CRIT, r, |
| "configuration error: couldn't %s: %s", phase, r->uri); |
| ap_die(SERVER_ERROR, r); |
| } |
| else |
| ap_die(status, r); |
| } |
| |
| API_EXPORT(int) ap_some_auth_required(request_rec *r) |
| { |
| /* Is there a require line configured for the type of *this* req? */ |
| |
| const array_header *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; |
| } |
| |
| static void process_request_internal(request_rec *r) |
| { |
| int access_status; |
| |
| /* Ignore embedded %2F's in path for proxy requests */ |
| if (!r->proxyreq && r->parsed_uri.path) { |
| access_status = ap_unescape_url(r->parsed_uri.path); |
| if (access_status) { |
| ap_die(access_status, r); |
| return; |
| } |
| } |
| |
| ap_getparents(r->uri); /* OK --- shrinking transformations... */ |
| |
| if ((access_status = location_walk(r))) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| if ((access_status = ap_translate_name(r))) { |
| decl_die(access_status, "translate", r); |
| return; |
| } |
| |
| if (!r->proxyreq) { |
| /* |
| * We don't want TRACE to run through the normal handler set, we |
| * handle it specially. |
| */ |
| if (r->method_number == M_TRACE) { |
| if ((access_status = ap_send_http_trace(r))) |
| ap_die(access_status, r); |
| else |
| ap_finalize_request_protocol(r); |
| return; |
| } |
| } |
| |
| if (r->proto_num > HTTP_VERSION(1,0) && ap_table_get(r->subprocess_env, "downgrade-1.0")) { |
| r->proto_num = HTTP_VERSION(1,0); |
| } |
| |
| /* |
| * NB: directory_walk() clears the per_dir_config, so we don't inherit |
| * from location_walk() above |
| */ |
| |
| if ((access_status = directory_walk(r))) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| if ((access_status = file_walk(r))) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| if ((access_status = location_walk(r))) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| if ((access_status = ap_header_parse(r))) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| switch (ap_satisfies(r)) { |
| case SATISFY_ALL: |
| case SATISFY_NOSPEC: |
| if ((access_status = ap_check_access(r)) != 0) { |
| decl_die(access_status, "check access", r); |
| return; |
| } |
| if (ap_some_auth_required(r)) { |
| if (((access_status = ap_check_user_id(r)) != 0) || !ap_auth_type(r)) { |
| decl_die(access_status, ap_auth_type(r) |
| ? "check user. No user file?" |
| : "perform authentication. AuthType not set!", r); |
| return; |
| } |
| if (((access_status = ap_check_auth(r)) != 0) || !ap_auth_type(r)) { |
| decl_die(access_status, ap_auth_type(r) |
| ? "check access. No groups file?" |
| : "perform authentication. AuthType not set!", r); |
| return; |
| } |
| } |
| break; |
| case SATISFY_ANY: |
| if (((access_status = ap_check_access(r)) != 0) || !ap_auth_type(r)) { |
| if (!ap_some_auth_required(r)) { |
| decl_die(access_status, ap_auth_type(r) |
| ? "check access" |
| : "perform authentication. AuthType not set!", r); |
| return; |
| } |
| if (((access_status = ap_check_user_id(r)) != 0) || !ap_auth_type(r)) { |
| decl_die(access_status, ap_auth_type(r) |
| ? "check user. No user file?" |
| : "perform authentication. AuthType not set!", r); |
| return; |
| } |
| if (((access_status = ap_check_auth(r)) != 0) || !ap_auth_type(r)) { |
| decl_die(access_status, ap_auth_type(r) |
| ? "check access. No groups file?" |
| : "perform authentication. AuthType not set!", r); |
| return; |
| } |
| } |
| break; |
| } |
| |
| if (! (r->proxyreq |
| && r->parsed_uri.scheme != NULL |
| && strcmp(r->parsed_uri.scheme, "http") == 0) ) { |
| if ((access_status = ap_find_types(r)) != 0) { |
| decl_die(access_status, "find types", r); |
| return; |
| } |
| } |
| |
| if ((access_status = ap_run_fixups(r)) != 0) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| if ((access_status = ap_invoke_handler(r)) != 0) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| /* Take care of little things that need to happen when we're done */ |
| ap_finalize_request_protocol(r); |
| } |
| |
| void ap_process_request(request_rec *r) |
| { |
| int old_stat; |
| |
| if (ap_extended_status) |
| ap_time_process_request(r->connection->child_num, START_PREQUEST); |
| |
| process_request_internal(r); |
| |
| old_stat = ap_update_child_status(r->connection->child_num, |
| SERVER_BUSY_LOG, r); |
| |
| /* |
| * We want to flush the last packet if this isn't a pipelining connection |
| * *before* we start into logging. Suppose that the logging causes a DNS |
| * lookup to occur, which may have a high latency. If we hold off on |
| * this packet, then it'll appear like the link is stalled when really |
| * it's the application that's stalled. |
| */ |
| ap_bhalfduplex(r->connection->client); |
| ap_log_transaction(r); |
| |
| (void) ap_update_child_status(r->connection->child_num, old_stat, r); |
| if (ap_extended_status) |
| ap_time_process_request(r->connection->child_num, STOP_PREQUEST); |
| } |
| |
| static table *rename_original_env(pool *p, table *t) |
| { |
| array_header *env_arr = ap_table_elts(t); |
| table_entry *elts = (table_entry *) env_arr->elts; |
| table *new = ap_make_table(p, env_arr->nalloc); |
| int i; |
| |
| for (i = 0; i < env_arr->nelts; ++i) { |
| if (!elts[i].key) |
| continue; |
| ap_table_setn(new, ap_pstrcat(p, "REDIRECT_", elts[i].key, NULL), |
| elts[i].val); |
| } |
| |
| return new; |
| } |
| |
| static request_rec *internal_internal_redirect(const char *new_uri, request_rec *r) |
| { |
| int access_status; |
| request_rec *new = (request_rec *) ap_pcalloc(r->pool, sizeof(request_rec)); |
| |
| new->connection = r->connection; |
| new->server = r->server; |
| new->pool = r->pool; |
| |
| /* |
| * A whole lot of this really ought to be shared with http_protocol.c... |
| * another missing cleanup. It's particularly inappropriate to be |
| * setting header_only, etc., here. |
| */ |
| |
| new->method = r->method; |
| new->method_number = r->method_number; |
| ap_parse_uri(new, new_uri); |
| new->request_config = ap_create_request_config(r->pool); |
| new->per_dir_config = r->server->lookup_defaults; |
| |
| new->prev = r; |
| r->next = new; |
| |
| /* Inherit the rest of the protocol info... */ |
| |
| new->the_request = r->the_request; |
| |
| new->allowed = r->allowed; |
| |
| new->status = r->status; |
| new->assbackwards = r->assbackwards; |
| new->header_only = r->header_only; |
| new->protocol = r->protocol; |
| new->proto_num = r->proto_num; |
| new->hostname = r->hostname; |
| new->request_time = r->request_time; |
| new->main = r->main; |
| |
| new->headers_in = r->headers_in; |
| new->headers_out = ap_make_table(r->pool, 12); |
| new->err_headers_out = r->err_headers_out; |
| new->subprocess_env = rename_original_env(r->pool, r->subprocess_env); |
| new->notes = ap_make_table(r->pool, 5); |
| |
| new->htaccess = r->htaccess; |
| new->no_cache = r->no_cache; |
| new->expecting_100 = r->expecting_100; |
| new->no_local_copy = r->no_local_copy; |
| new->read_length = r->read_length; /* We can only read it once */ |
| new->vlist_validator = r->vlist_validator; |
| |
| ap_table_setn(new->subprocess_env, "REDIRECT_STATUS", |
| ap_psprintf(r->pool, "%d", r->status)); |
| |
| /* |
| * XXX: hmm. This is because mod_setenvif and mod_unique_id really need |
| * to do their thing on internal redirects as well. Perhaps this is a |
| * misnamed function. |
| */ |
| if ((access_status = ap_run_post_read_request(new))) { |
| ap_die(access_status, new); |
| return NULL; |
| } |
| |
| return new; |
| } |
| |
| API_EXPORT(void) ap_internal_redirect(const char *new_uri, request_rec *r) |
| { |
| request_rec *new = internal_internal_redirect(new_uri, r); |
| process_request_internal(new); |
| } |
| |
| /* This function is designed for things like actions or CGI scripts, when |
| * using AddHandler, and you want to preserve the content type across |
| * an internal redirect. |
| */ |
| API_EXPORT(void) ap_internal_redirect_handler(const char *new_uri, request_rec *r) |
| { |
| request_rec *new = internal_internal_redirect(new_uri, r); |
| if (r->handler) |
| new->content_type = r->content_type; |
| process_request_internal(new); |
| } |
| |
| /* |
| * Is it the initial main request, which we only get *once* per HTTP request? |
| */ |
| API_EXPORT(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 */ |
| } |
| |
| /* |
| * Function to set the r->mtime field to the specified value if it's later |
| * than what's already there. |
| */ |
| API_EXPORT(time_t) ap_update_mtime(request_rec *r, time_t dependency_mtime) |
| { |
| if (r->mtime < dependency_mtime) { |
| r->mtime = dependency_mtime; |
| } |
| return r->mtime; |
| } |
