1 /* ====================================================================
2 * The Apache Software License, Version 1.1
4 * Copyright (c) 2000-2004 The Apache Software Foundation. All rights
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. The end-user documentation included with the redistribution,
20 * if any, must include the following acknowledgment:
21 * "This product includes software developed by the
22 * Apache Software Foundation (http://www.apache.org/)."
23 * Alternately, this acknowledgment may appear in the software itself,
24 * if and wherever such third-party acknowledgments normally appear.
26 * 4. The names "Apache" and "Apache Software Foundation" must
27 * not be used to endorse or promote products derived from this
28 * software without prior written permission. For written
29 * permission, please contact apache@apache.org.
31 * 5. Products derived from this software may not be called "Apache",
32 * nor may "Apache" appear in their name, without prior written
33 * permission of the Apache Software Foundation.
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47 * ====================================================================
49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Software Foundation. For more
51 * information on the Apache Software Foundation, please see
52 * <http://www.apache.org/>.
54 * Portions of this software are based upon public domain software
55 * originally written at the National Center for Supercomputing Applications,
56 * University of Illinois, Urbana-Champaign.
60 * _ __ ___ ___ __| | _ __ _____ ___ __(_) |_ ___
61 * | '_ ` _ \ / _ \ / _` | | '__/ _ \ \ /\ / / '__| | __/ _ \
62 * | | | | | | (_) | (_| | | | | __/\ V V /| | | | || __/
63 * |_| |_| |_|\___/ \__,_|___|_| \___| \_/\_/ |_| |_|\__\___|
66 * URL Rewriting Module
68 * This module uses a rule-based rewriting engine (based on a
69 * regular-expression parser) to rewrite requested URLs on the fly.
71 * It supports an unlimited number of additional rule conditions (which can
72 * operate on a lot of variables, even on HTTP headers) for granular
73 * matching and even external database lookups (either via plain text
74 * tables, DBM hash files or even external processes) for advanced URL
77 * It operates on the full URLs (including the PATH_INFO part) both in
78 * per-server context (httpd.conf) and per-dir context (.htaccess) and even
79 * can generate QUERY_STRING parts on result. The rewriting result finally
80 * can lead to internal subprocessing, external request redirection or even
81 * to internal proxy throughput.
83 * This module was originally written in April 1996 and
84 * gifted exclusively to the The Apache Software Foundation in July 1997 by
92 #include "apr_strings.h"
96 #include "apr_signal.h"
97 #include "apr_global_mutex.h"
101 #include "apr_thread_mutex.h"
104 #define APR_WANT_MEMFUNC
105 #define APR_WANT_STRFUNC
106 #define APR_WANT_IOVEC
107 #include "apr_want.h"
109 /* XXX: Do we really need these headers? */
110 #if APR_HAVE_UNISTD_H
113 #if APR_HAVE_SYS_TYPES_H
114 #include <sys/types.h>
116 #if APR_HAVE_STDARG_H
119 #if APR_HAVE_STDLIB_H
126 #include "ap_config.h"
128 #include "http_config.h"
129 #include "http_request.h"
130 #include "http_core.h"
131 #include "http_log.h"
132 #include "http_protocol.h"
133 #include "http_vhost.h"
135 #include "mod_rewrite.h"
137 #if !defined(OS2) && !defined(WIN32) && !defined(BEOS) && !defined(NETWARE)
139 #define MOD_REWRITE_SET_MUTEX_PERMS /* XXX Apache should define something */
143 * in order to improve performance on running production systems, you
144 * may strip all rewritelog code entirely from mod_rewrite by using the
145 * -DREWRITELOG_DISABLED compiler option.
147 * DO NOT USE THIS OPTION FOR PUBLIC BINARY RELEASES. Otherwise YOU are
148 * responsible for answering all the mod_rewrite questions out there.
150 #ifndef REWRITELOG_DISABLED
152 #define rewritelog(x) do_rewritelog x
153 #define REWRITELOG_MODE ( APR_UREAD | APR_UWRITE | APR_GREAD | APR_WREAD )
154 #define REWRITELOG_FLAGS ( APR_WRITE | APR_APPEND | APR_CREATE )
156 #else /* !REWRITELOG_DISABLED */
158 #define rewritelog(x)
160 #endif /* REWRITELOG_DISABLED */
162 /* remembered mime-type for [T=...] */
163 #define REWRITE_FORCED_MIMETYPE_NOTEVAR "rewrite-forced-mimetype"
164 #define REWRITE_FORCED_HANDLER_NOTEVAR "rewrite-forced-handler"
166 #define ENVVAR_SCRIPT_URL "SCRIPT_URL"
167 #define REDIRECT_ENVVAR_SCRIPT_URL "REDIRECT_" ENVVAR_SCRIPT_URL
168 #define ENVVAR_SCRIPT_URI "SCRIPT_URI"
170 #define CONDFLAG_NONE 1<<0
171 #define CONDFLAG_NOCASE 1<<1
172 #define CONDFLAG_NOTMATCH 1<<2
173 #define CONDFLAG_ORNEXT 1<<3
175 #define RULEFLAG_NONE 1<<0
176 #define RULEFLAG_FORCEREDIRECT 1<<1
177 #define RULEFLAG_LASTRULE 1<<2
178 #define RULEFLAG_NEWROUND 1<<3
179 #define RULEFLAG_CHAIN 1<<4
180 #define RULEFLAG_IGNOREONSUBREQ 1<<5
181 #define RULEFLAG_NOTMATCH 1<<6
182 #define RULEFLAG_PROXY 1<<7
183 #define RULEFLAG_PASSTHROUGH 1<<8
184 #define RULEFLAG_QSAPPEND 1<<9
185 #define RULEFLAG_NOCASE 1<<10
186 #define RULEFLAG_NOESCAPE 1<<11
187 #define RULEFLAG_NOSUB 1<<12
188 #define RULEFLAG_STATUS 1<<13
190 /* return code of the rewrite rule
191 * the result may be escaped - or not
193 #define ACTION_NORMAL 1<<0
194 #define ACTION_NOESCAPE 1<<1
195 #define ACTION_STATUS 1<<2
198 #define MAPTYPE_TXT 1<<0
199 #define MAPTYPE_DBM 1<<1
200 #define MAPTYPE_PRG 1<<2
201 #define MAPTYPE_INT 1<<3
202 #define MAPTYPE_RND 1<<4
204 #define ENGINE_DISABLED 1<<0
205 #define ENGINE_ENABLED 1<<1
207 #define OPTION_NONE 1<<0
208 #define OPTION_INHERIT 1<<1
211 #define RAND_MAX 32767
214 /* max cookie size in rfc 2109 */
215 /* XXX: not used at all. We should do a check somewhere and/or cut the cookie */
216 #define MAX_COOKIE_LEN 4096
218 /* default maximum number of internal redirects */
219 #define REWRITE_REDIRECT_LIMIT 10
221 /* max line length (incl.\n) in text rewrite maps */
222 #ifndef REWRITE_MAX_TXT_MAP_LINE
223 #define REWRITE_MAX_TXT_MAP_LINE 1024
226 /* max response length (incl.\n) in prg rewrite maps */
227 #ifndef REWRITE_MAX_PRG_MAP_LINE
228 #define REWRITE_MAX_PRG_MAP_LINE 2048
231 /* for better readbility */
232 #define LEFT_CURLY '{'
233 #define RIGHT_CURLY '}'
236 * expansion result items on the stack to save some cycles
238 * (5 == about 2 variables like "foo%{var}bar%{var}baz")
240 #define SMALL_EXPANSION 5
243 * check that a subrequest won't cause infinite recursion
245 * either not in a subrequest, or in a subrequest
246 * and URIs aren't NULL and sub/main URIs differ
248 #define subreq_ok(r) (!r->main || \
249 (r->main->uri && r->uri && strcmp(r->main->uri, r->uri)))
253 * +-------------------------------------------------------+
255 * | Types and Structures
257 * +-------------------------------------------------------+
261 const char *datafile; /* filename for map data files */
262 const char *dbmtype; /* dbm type for dbm map data files */
263 const char *checkfile; /* filename to check for map existence */
264 int type; /* the type of the map */
265 apr_file_t *fpin; /* in file pointer for program maps */
266 apr_file_t *fpout; /* out file pointer for program maps */
267 apr_file_t *fperr; /* err file pointer for program maps */
268 char *(*func)(request_rec *, /* function pointer for internal maps */
270 char **argv; /* argv of the external rewrite map */
273 /* special pattern types for RewriteCond */
289 char *input; /* Input string of RewriteCond */
290 char *pattern; /* the RegExp pattern string */
291 regex_t *regexp; /* the precompiled regexp */
292 int flags; /* Flags which control the match */
293 pattern_type ptype; /* pattern type */
296 /* single linked list for env vars and cookies */
297 typedef struct data_item {
298 struct data_item *next;
303 apr_array_header_t *rewriteconds;/* the corresponding RewriteCond entries */
304 char *pattern; /* the RegExp pattern string */
305 regex_t *regexp; /* the RegExp pattern compilation */
306 char *output; /* the Substitution string */
307 int flags; /* Flags which control the substitution */
308 char *forced_mimetype; /* forced MIME type of substitution */
309 char *forced_handler; /* forced content handler of subst. */
310 int forced_responsecode; /* forced HTTP response status */
311 data_item *env; /* added environment variables */
312 data_item *cookie; /* added cookies */
313 int skip; /* number of next rules to skip */
317 int state; /* the RewriteEngine state */
318 int options; /* the RewriteOption state */
319 #ifndef REWRITELOG_DISABLED
320 const char *rewritelogfile; /* the RewriteLog filename */
321 apr_file_t *rewritelogfp; /* the RewriteLog open filepointer */
322 int rewriteloglevel; /* the RewriteLog level of verbosity */
324 apr_hash_t *rewritemaps; /* the RewriteMap entries */
325 apr_array_header_t *rewriteconds; /* the RewriteCond entries (temp.) */
326 apr_array_header_t *rewriterules; /* the RewriteRule entries */
327 server_rec *server; /* the corresponding server indicator */
328 int redirect_limit; /* max number of internal redirects */
329 } rewrite_server_conf;
332 int state; /* the RewriteEngine state */
333 int options; /* the RewriteOption state */
334 apr_array_header_t *rewriteconds; /* the RewriteCond entries (temp.) */
335 apr_array_header_t *rewriterules; /* the RewriteRule entries */
336 char *directory; /* the directory where it applies */
337 const char *baseurl; /* the base-URL where it applies */
338 int redirect_limit; /* max. number of internal redirects */
339 } rewrite_perdir_conf;
342 int redirects; /* current number of redirects */
343 int redirect_limit; /* maximum number of redirects */
344 } rewrite_request_conf;
346 /* the (per-child) cache structures.
348 typedef struct cache {
352 apr_thread_mutex_t *lock;
356 /* cached maps contain an mtime for the whole map and live in a subpool
357 * of the cachep->pool. That makes it easy to forget them if necessary.
365 /* the regex structure for the
366 * substitution of backreferences
368 typedef struct backrefinfo {
371 regmatch_t regmatch[AP_MAX_REG_MATCH];
374 /* single linked list used for
377 typedef struct result_list {
378 struct result_list *next;
383 /* context structure for variable lookup and expansion
388 const char *vary_this;
396 * +-------------------------------------------------------+
398 * | static module data
400 * +-------------------------------------------------------+
403 /* the global module structure */
404 module AP_MODULE_DECLARE_DATA rewrite_module;
406 /* rewritemap int: handler function registry */
407 static apr_hash_t *mapfunc_hash;
410 static cache *cachep;
412 /* whether proxy module is available or not */
413 static int proxy_available;
415 /* whether random seed can be reaped */
416 static int rewrite_rand_init_done = 0;
419 static const char *lockname;
420 static apr_global_mutex_t *rewrite_mapr_lock_acquire = NULL;
422 #ifndef REWRITELOG_DISABLED
423 static apr_global_mutex_t *rewrite_log_lock = NULL;
428 * +-------------------------------------------------------+
430 * | rewriting logfile support
432 * +-------------------------------------------------------+
435 #ifndef REWRITELOG_DISABLED
436 static char *current_logtime(request_rec *r)
442 apr_time_exp_lt(&t, apr_time_now());
444 apr_strftime(tstr, &len, sizeof(tstr), "[%d/%b/%Y:%H:%M:%S ", &t);
445 apr_snprintf(tstr+len, sizeof(tstr)-len, "%c%.2d%.2d]",
446 t.tm_gmtoff < 0 ? '-' : '+',
447 t.tm_gmtoff / (60*60), t.tm_gmtoff % (60*60));
449 return apr_pstrdup(r->pool, tstr);
452 static int open_rewritelog(server_rec *s, apr_pool_t *p)
454 rewrite_server_conf *conf;
457 conf = ap_get_module_config(s->module_config, &rewrite_module);
459 /* - no logfile configured
460 * - logfilename empty
461 * - virtual log shared w/ main server
463 if (!conf->rewritelogfile || !*conf->rewritelogfile || conf->rewritelogfp) {
467 if (*conf->rewritelogfile == '|') {
470 fname = ap_server_root_relative(p, conf->rewritelogfile+1);
472 ap_log_error(APLOG_MARK, APLOG_ERR, APR_EBADPATH, s,
473 "mod_rewrite: Invalid RewriteLog "
474 "path %s", conf->rewritelogfile+1);
478 if ((pl = ap_open_piped_log(p, fname)) == NULL) {
479 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
480 "mod_rewrite: could not open reliable pipe "
481 "to RewriteLog filter %s", fname);
484 conf->rewritelogfp = ap_piped_log_write_fd(pl);
489 fname = ap_server_root_relative(p, conf->rewritelogfile);
491 ap_log_error(APLOG_MARK, APLOG_ERR, APR_EBADPATH, s,
492 "mod_rewrite: Invalid RewriteLog "
493 "path %s", conf->rewritelogfile);
497 if ((rc = apr_file_open(&conf->rewritelogfp, fname,
498 REWRITELOG_FLAGS, REWRITELOG_MODE, p))
500 ap_log_error(APLOG_MARK, APLOG_ERR, rc, s,
501 "mod_rewrite: could not open RewriteLog "
510 static void do_rewritelog(request_rec *r, int level, char *perdir,
511 const char *fmt, ...)
513 rewrite_server_conf *conf;
514 char *logline, *text;
515 const char *rhost, *rname;
522 conf = ap_get_module_config(r->server->module_config, &rewrite_module);
524 if (!conf->rewritelogfp || level > conf->rewriteloglevel) {
528 rhost = ap_get_remote_host(r->connection, r->per_dir_config,
529 REMOTE_NOLOOKUP, NULL);
530 rname = ap_get_remote_logname(r);
532 for (redir=0, req=r; req->prev; req = req->prev) {
537 text = apr_pvsprintf(r->pool, fmt, ap);
540 logline = apr_psprintf(r->pool, "%s %s %s %s [%s/sid#%pp][rid#%pp/%s%s%s] "
541 "(%d) %s%s%s%s" APR_EOL_STR,
542 rhost ? rhost : "UNKNOWN-HOST",
544 r->user ? (*r->user ? r->user : "\"\"") : "-",
546 ap_get_server_name(r),
549 r->main ? "subreq" : "initial",
550 redir ? "/redir#" : "",
551 redir ? apr_itoa(r->pool, redir) : "",
553 perdir ? "[perdir " : "",
554 perdir ? perdir : "",
558 rv = apr_global_mutex_lock(rewrite_log_lock);
559 if (rv != APR_SUCCESS) {
560 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
561 "apr_global_mutex_lock(rewrite_log_lock) failed");
562 /* XXX: Maybe this should be fatal? */
565 nbytes = strlen(logline);
566 apr_file_write(conf->rewritelogfp, logline, &nbytes);
568 rv = apr_global_mutex_unlock(rewrite_log_lock);
569 if (rv != APR_SUCCESS) {
570 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
571 "apr_global_mutex_unlock(rewrite_log_lock) failed");
572 /* XXX: Maybe this should be fatal? */
577 #endif /* !REWRITELOG_DISABLED */
581 * +-------------------------------------------------------+
583 * | URI and path functions
585 * +-------------------------------------------------------+
588 /* return number of chars of the scheme (incl. '://')
589 * if the URI is absolute (includes a scheme etc.)
592 * NOTE: If you add new schemes here, please have a
593 * look at escape_absolute_uri and splitout_queryargs.
594 * Not every scheme takes query strings and some schemes
595 * may be handled in a special way.
597 * XXX: we may consider a scheme registry, perhaps with
598 * appropriate escape callbacks to allow other modules
599 * to extend mod_rewrite at runtime.
601 static unsigned is_absolute_uri(char *uri)
604 if (*uri == '/' || strlen(uri) <= 5) {
611 if (!strncasecmp(uri, "tp://", 5)) { /* ftp:// */
618 if (!strncasecmp(uri, "opher://", 8)) { /* gopher:// */
625 if (!strncasecmp(uri, "ttp://", 6)) { /* http:// */
628 else if (!strncasecmp(uri, "ttps://", 7)) { /* https:// */
635 if (!strncasecmp(uri, "dap://", 6)) { /* ldap:// */
642 if (!strncasecmp(uri, "ailto:", 6)) { /* mailto: */
649 if (!strncasecmp(uri, "ews:", 4)) { /* news: */
652 else if (!strncasecmp(uri, "ntp://", 6)) { /* nntp:// */
662 * escape absolute uri, which may or may not be path oriented.
663 * So let's handle them differently.
665 static char *escape_absolute_uri(apr_pool_t *p, char *uri, unsigned scheme)
670 * NULL should indicate elsewhere, that something's wrong
672 if (!scheme || strlen(uri) < scheme) {
678 /* scheme with authority part? */
681 while (*cp && *cp != '/') {
685 /* nothing after the hostpart. ready! */
686 if (!*cp || !*++cp) {
687 return apr_pstrdup(p, uri);
690 /* remember the hostname stuff */
693 /* special thing for ldap.
694 * The parts are separated by question marks. From RFC 2255:
695 * ldapurl = scheme "://" [hostport] ["/"
696 * [dn ["?" [attributes] ["?" [scope]
697 * ["?" [filter] ["?" extensions]]]]]]
699 if (!strncasecmp(uri, "ldap", 4)) {
703 token[0] = cp = apr_pstrdup(p, cp);
704 while (*cp && c < 5) {
712 return apr_pstrcat(p, apr_pstrndup(p, uri, scheme),
713 ap_escape_uri(p, token[0]),
714 (c >= 1) ? "?" : NULL,
715 (c >= 1) ? ap_escape_uri(p, token[1]) : NULL,
716 (c >= 2) ? "?" : NULL,
717 (c >= 2) ? ap_escape_uri(p, token[2]) : NULL,
718 (c >= 3) ? "?" : NULL,
719 (c >= 3) ? ap_escape_uri(p, token[3]) : NULL,
720 (c >= 4) ? "?" : NULL,
721 (c >= 4) ? ap_escape_uri(p, token[4]) : NULL,
726 /* Nothing special here. Apply normal escaping. */
727 return apr_pstrcat(p, apr_pstrndup(p, uri, scheme),
728 ap_escape_uri(p, cp), NULL);
732 * split out a QUERY_STRING part from
733 * the current URI string
735 static void splitout_queryargs(request_rec *r, int qsappend)
739 /* don't touch, unless it's an http or mailto URL.
740 * See RFC 1738 and RFC 2368.
742 if ( is_absolute_uri(r->filename)
743 && strncasecmp(r->filename, "http", 4)
744 && strncasecmp(r->filename, "mailto", 6)) {
745 r->args = NULL; /* forget the query that's still flying around */
749 q = ap_strchr(r->filename, '?');
754 olduri = apr_pstrdup(r->pool, r->filename);
757 r->args = apr_pstrcat(r->pool, q, "&", r->args, NULL);
760 r->args = apr_pstrdup(r->pool, q);
763 len = strlen(r->args);
767 else if (r->args[len-1] == '&') {
768 r->args[len-1] = '\0';
771 rewritelog((r, 3, NULL, "split uri=%s -> uri=%s, args=%s", olduri,
772 r->filename, r->args ? r->args : "<none>"));
779 * strip 'http[s]://ourhost/' from URI
781 static void reduce_uri(request_rec *r)
786 cp = (char *)ap_http_method(r);
788 if ( strlen(r->filename) > l+3
789 && strncasecmp(r->filename, cp, l) == 0
790 && r->filename[l] == ':'
791 && r->filename[l+1] == '/'
792 && r->filename[l+2] == '/' ) {
795 char *portp, *host, *url, *scratch;
797 scratch = apr_pstrdup(r->pool, r->filename); /* our scratchpad */
799 /* cut the hostname and port out of the URI */
800 cp = host = scratch + l + 3; /* 3 == strlen("://") */
801 while (*cp && *cp != '/' && *cp != ':') {
805 if (*cp == ':') { /* additional port given */
808 while (*cp && *cp != '/') {
814 url = r->filename + (cp - scratch);
819 else if (*cp == '/') { /* default port */
822 port = ap_default_port(r);
823 url = r->filename + (cp - scratch);
826 port = ap_default_port(r);
830 /* now check whether we could reduce it to a local path... */
831 if (ap_matches_request_vhost(r, host, port)) {
832 rewritelog((r, 3, NULL, "reduce %s -> %s", r->filename, url));
833 r->filename = apr_pstrdup(r->pool, url);
841 * add 'http[s]://ourhost[:ourport]/' to URI
842 * if URI is still not fully qualified
844 static void fully_qualify_uri(request_rec *r)
846 if (!is_absolute_uri(r->filename)) {
847 const char *thisserver;
851 thisserver = ap_get_server_name(r);
852 port = ap_get_server_port(r);
853 thisport = ap_is_default_port(port, r)
855 : apr_psprintf(r->pool, ":%u", port);
857 r->filename = apr_psprintf(r->pool, "%s://%s%s%s%s",
858 ap_http_method(r), thisserver, thisport,
859 (*r->filename == '/') ? "" : "/",
867 * stat() only the first segment of a path
869 static int prefix_stat(const char *path, apr_pool_t *pool)
871 const char *curpath = path;
877 rv = apr_filepath_root(&root, &curpath, APR_FILEPATH_TRUENAME, pool);
879 if (rv != APR_SUCCESS) {
883 /* let's recognize slashes only, the mod_rewrite semantics are opaque
886 if ((slash = ap_strchr_c(curpath, '/')) != NULL) {
887 rv = apr_filepath_merge(&statpath, root,
888 apr_pstrndup(pool, curpath,
889 (apr_size_t)(slash - curpath)),
890 APR_FILEPATH_NOTABOVEROOT |
891 APR_FILEPATH_NOTRELATIVE, pool);
894 rv = apr_filepath_merge(&statpath, root, curpath,
895 APR_FILEPATH_NOTABOVEROOT |
896 APR_FILEPATH_NOTRELATIVE, pool);
899 if (rv == APR_SUCCESS) {
902 if (apr_stat(&sb, statpath, APR_FINFO_MIN, pool) == APR_SUCCESS) {
911 * substitute the prefix path 'match' in 'input' with 'subst' (RewriteBase)
913 static char *subst_prefix_path(request_rec *r, char *input, char *match,
916 apr_size_t len = strlen(match);
918 if (len && match[len - 1] == '/') {
922 if (!strncmp(input, match, len) && input[len++] == '/') {
923 apr_size_t slen, outlen;
926 rewritelog((r, 5, NULL, "strip matching prefix: %s -> %s", input,
929 slen = strlen(subst);
930 if (slen && subst[slen - 1] != '/') {
934 outlen = strlen(input) + slen - len;
935 output = apr_palloc(r->pool, outlen + 1); /* don't forget the \0 */
937 memcpy(output, subst, slen);
938 if (slen && !output[slen-1]) {
939 output[slen-1] = '/';
941 memcpy(output+slen, input+len, outlen - slen);
942 output[outlen] = '\0';
944 rewritelog((r, 4, NULL, "add subst prefix: %s -> %s", input+len,
950 /* prefix didn't match */
956 * +-------------------------------------------------------+
960 * +-------------------------------------------------------+
963 static void set_cache_value(const char *name, apr_time_t t, char *key,
970 apr_thread_mutex_lock(cachep->lock);
972 map = apr_hash_get(cachep->maps, name, APR_HASH_KEY_STRING);
977 if (apr_pool_create(&p, cachep->pool) != APR_SUCCESS) {
979 apr_thread_mutex_unlock(cachep->lock);
984 map = apr_palloc(cachep->pool, sizeof(cachedmap));
986 map->entries = apr_hash_make(map->pool);
989 apr_hash_set(cachep->maps, name, APR_HASH_KEY_STRING, map);
991 else if (map->mtime != t) {
992 apr_pool_clear(map->pool);
993 map->entries = apr_hash_make(map->pool);
997 /* Now we should have a valid map->entries hash, where we
998 * can store our value.
1000 * We need to copy the key and the value into OUR pool,
1001 * so that we don't leave it during the r->pool cleanup.
1003 apr_hash_set(map->entries,
1004 apr_pstrdup(map->pool, key), APR_HASH_KEY_STRING,
1005 apr_pstrdup(map->pool, val));
1008 apr_thread_mutex_unlock(cachep->lock);
1015 static char *get_cache_value(const char *name, apr_time_t t, char *key,
1023 apr_thread_mutex_lock(cachep->lock);
1025 map = apr_hash_get(cachep->maps, name, APR_HASH_KEY_STRING);
1028 /* if this map is outdated, forget it. */
1029 if (map->mtime != t) {
1030 apr_pool_clear(map->pool);
1031 map->entries = apr_hash_make(map->pool);
1035 val = apr_hash_get(map->entries, key, APR_HASH_KEY_STRING);
1037 /* copy the cached value into the supplied pool,
1038 * where it belongs (r->pool usually)
1040 val = apr_pstrdup(p, val);
1046 apr_thread_mutex_unlock(cachep->lock);
1053 static int init_cache(apr_pool_t *p)
1055 cachep = apr_palloc(p, sizeof(cache));
1056 if (apr_pool_create(&cachep->pool, p) != APR_SUCCESS) {
1057 cachep = NULL; /* turns off cache */
1061 cachep->maps = apr_hash_make(cachep->pool);
1063 (void)apr_thread_mutex_create(&(cachep->lock), APR_THREAD_MUTEX_DEFAULT, p);
1071 * +-------------------------------------------------------+
1075 * +-------------------------------------------------------+
1079 * General Note: key is already a fresh string, created (expanded) just
1080 * for the purpose to be passed in here. So one can modify key itself.
1083 static char *rewrite_mapfunc_toupper(request_rec *r, char *key)
1087 for (p = key; *p; ++p) {
1088 *p = apr_toupper(*p);
1094 static char *rewrite_mapfunc_tolower(request_rec *r, char *key)
1098 for (p = key; *p; ++p) {
1099 *p = apr_tolower(*p);
1105 static char *rewrite_mapfunc_escape(request_rec *r, char *key)
1107 return ap_escape_uri(r->pool, key);
1110 static char *rewrite_mapfunc_unescape(request_rec *r, char *key)
1112 ap_unescape_url(key);
1117 static char *select_random_value_part(request_rec *r, char *value)
1122 /* count number of distinct values */
1123 while ((p = ap_strchr(p, '|')) != NULL) {
1129 /* initialize random generator
1131 * XXX: Probably this should be wrapped into a thread mutex,
1132 * shouldn't it? Is it worth the effort?
1134 if (!rewrite_rand_init_done) {
1135 srand((unsigned)(getpid()));
1136 rewrite_rand_init_done = 1;
1139 /* select a random subvalue */
1140 n = (int)(((double)(rand() % RAND_MAX) / RAND_MAX) * n + 1);
1142 /* extract it from the whole string */
1143 while (--n && (value = ap_strchr(value, '|')) != NULL) {
1147 if (value) { /* should not be NULL, but ... */
1148 p = ap_strchr(value, '|');
1158 /* child process code */
1159 static void rewrite_child_errfn(apr_pool_t *p, apr_status_t err,
1162 ap_log_error(APLOG_MARK, APLOG_ERR, err, NULL, "%s", desc);
1165 static apr_status_t rewritemap_program_child(apr_pool_t *p,
1166 const char *progname, char **argv,
1171 apr_procattr_t *procattr;
1172 apr_proc_t *procnew;
1174 if ( APR_SUCCESS == (rc=apr_procattr_create(&procattr, p))
1175 && APR_SUCCESS == (rc=apr_procattr_io_set(procattr, APR_FULL_BLOCK,
1176 APR_FULL_BLOCK, APR_NO_PIPE))
1177 && APR_SUCCESS == (rc=apr_procattr_dir_set(procattr,
1178 ap_make_dirstr_parent(p, argv[0])))
1179 && APR_SUCCESS == (rc=apr_procattr_cmdtype_set(procattr, APR_PROGRAM))
1180 && APR_SUCCESS == (rc=apr_procattr_child_errfn_set(procattr,
1181 rewrite_child_errfn))
1182 && APR_SUCCESS == (rc=apr_procattr_error_check_set(procattr, 1))) {
1184 procnew = apr_pcalloc(p, sizeof(*procnew));
1185 rc = apr_proc_create(procnew, argv[0], (const char **)argv, NULL,
1188 if (rc == APR_SUCCESS) {
1189 apr_pool_note_subprocess(p, procnew, APR_KILL_AFTER_TIMEOUT);
1192 (*fpin) = procnew->in;
1196 (*fpout) = procnew->out;
1204 static apr_status_t run_rewritemap_programs(server_rec *s, apr_pool_t *p)
1206 rewrite_server_conf *conf;
1207 apr_hash_index_t *hi;
1210 conf = ap_get_module_config(s->module_config, &rewrite_module);
1212 /* If the engine isn't turned on,
1213 * don't even try to do anything.
1215 if (conf->state == ENGINE_DISABLED) {
1219 for (hi = apr_hash_first(p, conf->rewritemaps); hi; hi = apr_hash_next(hi)){
1220 apr_file_t *fpin = NULL;
1221 apr_file_t *fpout = NULL;
1222 rewritemap_entry *map;
1225 apr_hash_this(hi, NULL, NULL, &val);
1228 if (map->type != MAPTYPE_PRG) {
1231 if (!(map->argv[0]) || !*(map->argv[0]) || map->fpin || map->fpout) {
1235 rc = rewritemap_program_child(p, map->argv[0], map->argv,
1237 if (rc != APR_SUCCESS || fpin == NULL || fpout == NULL) {
1238 ap_log_error(APLOG_MARK, APLOG_ERR, rc, s,
1239 "mod_rewrite: could not start RewriteMap "
1240 "program %s", map->checkfile);
1252 * +-------------------------------------------------------+
1254 * | Lookup functions
1256 * +-------------------------------------------------------+
1259 static char *lookup_map_txtfile(request_rec *r, const char *file, char *key)
1261 apr_file_t *fp = NULL;
1262 char line[REWRITE_MAX_TXT_MAP_LINE + 1]; /* +1 for \0 */
1263 char *value, *keylast;
1265 if (apr_file_open(&fp, file, APR_READ, APR_OS_DEFAULT,
1266 r->pool) != APR_SUCCESS) {
1270 keylast = key + strlen(key);
1272 while (apr_file_gets(line, sizeof(line), fp) == APR_SUCCESS) {
1275 /* ignore comments and lines starting with whitespaces */
1276 if (*line == '#' || apr_isspace(*line)) {
1282 while (c < keylast && *p == *c && !apr_isspace(*p)) {
1287 /* key doesn't match - ignore. */
1288 if (c != keylast || !apr_isspace(*p)) {
1292 /* jump to the value */
1293 while (*p && apr_isspace(*p)) {
1297 /* no value? ignore */
1302 /* extract the value and return. */
1304 while (*p && !apr_isspace(*p)) {
1307 value = apr_pstrmemdup(r->pool, c, p - c);
1315 static char *lookup_map_dbmfile(request_rec *r, const char *file,
1316 const char *dbmtype, char *key)
1318 apr_dbm_t *dbmfp = NULL;
1323 if (apr_dbm_open_ex(&dbmfp, dbmtype, file, APR_DBM_READONLY, APR_OS_DEFAULT,
1324 r->pool) != APR_SUCCESS) {
1329 dbmkey.dsize = strlen(key);
1331 if (apr_dbm_fetch(dbmfp, dbmkey, &dbmval) == APR_SUCCESS && dbmval.dptr) {
1332 value = apr_pstrmemdup(r->pool, dbmval.dptr, dbmval.dsize);
1338 apr_dbm_close(dbmfp);
1343 static char *lookup_map_program(request_rec *r, apr_file_t *fpin,
1344 apr_file_t *fpout, char *key)
1346 char buf[REWRITE_MAX_PRG_MAP_LINE];
1351 const char *eol = APR_EOL_STR;
1355 struct iovec iova[2];
1359 /* when `RewriteEngine off' was used in the per-server
1360 * context then the rewritemap-programs were not spawned.
1361 * In this case using such a map (usually in per-dir context)
1362 * is useless because it is not available.
1364 * newlines in the key leave bytes in the pipe and cause
1365 * bad things to happen (next map lookup will use the chars
1366 * after the \n instead of the new key etc etc - in other words,
1367 * the Rewritemap falls out of sync with the requests).
1369 if (fpin == NULL || fpout == NULL || ap_strchr(key, '\n')) {
1374 if (rewrite_mapr_lock_acquire) {
1375 rv = apr_global_mutex_lock(rewrite_mapr_lock_acquire);
1376 if (rv != APR_SUCCESS) {
1377 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
1378 "apr_global_mutex_lock(rewrite_mapr_lock_acquire) "
1380 return NULL; /* Maybe this should be fatal? */
1384 /* write out the request key */
1386 nbytes = strlen(key);
1387 apr_file_write(fpin, key, &nbytes);
1389 apr_file_write(fpin, "\n", &nbytes);
1391 iova[0].iov_base = key;
1392 iova[0].iov_len = strlen(key);
1393 iova[1].iov_base = "\n";
1394 iova[1].iov_len = 1;
1397 apr_file_writev(fpin, iova, niov, &nbytes);
1400 /* read in the response value */
1403 apr_file_read(fpout, &c, &nbytes);
1404 while (nbytes == 1 && (i < REWRITE_MAX_PRG_MAP_LINE)) {
1405 if (c == eol[eolc]) {
1407 /* remove eol from the buffer */
1413 /* only partial (invalid) eol sequence -> reset the counter */
1418 /* catch binary mode, e.g. on Win32 */
1419 else if (c == '\n') {
1424 apr_file_read(fpout, &c, &nbytes);
1427 /* give the lock back */
1428 if (rewrite_mapr_lock_acquire) {
1429 rv = apr_global_mutex_unlock(rewrite_mapr_lock_acquire);
1430 if (rv != APR_SUCCESS) {
1431 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
1432 "apr_global_mutex_unlock(rewrite_mapr_lock_acquire) "
1434 return NULL; /* Maybe this should be fatal? */
1438 /* buf is not zero terminated, so be careful! */
1439 if (i == 4 && strncasecmp(buf, "NULL", 4) == 0) {
1443 return apr_pstrmemdup(r->pool, buf, i);
1447 * generic map lookup
1449 static char *lookup_map(request_rec *r, char *name, char *key)
1451 rewrite_server_conf *conf;
1452 rewritemap_entry *s;
1457 /* get map configuration */
1458 conf = ap_get_module_config(r->server->module_config, &rewrite_module);
1459 s = apr_hash_get(conf->rewritemaps, name, APR_HASH_KEY_STRING);
1461 /* map doesn't exist */
1468 * Text file map (perhaps random)
1472 rv = apr_stat(&st, s->checkfile, APR_FINFO_MIN, r->pool);
1473 if (rv != APR_SUCCESS) {
1474 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
1475 "mod_rewrite: can't access text RewriteMap file %s",
1477 rewritelog((r, 1, NULL,
1478 "can't open RewriteMap file, see error log"));
1482 value = get_cache_value(name, st.mtime, key, r->pool);
1484 rewritelog((r, 6, NULL,
1485 "cache lookup FAILED, forcing new map lookup"));
1487 value = lookup_map_txtfile(r, s->datafile, key);
1489 rewritelog((r, 5, NULL, "map lookup FAILED: map=%s[txt] key=%s",
1491 set_cache_value(name, st.mtime, key, "");
1495 rewritelog((r, 5, NULL,"map lookup OK: map=%s[txt] key=%s -> val=%s",
1497 set_cache_value(name, st.mtime, key, value);
1500 rewritelog((r,5,NULL,"cache lookup OK: map=%s[txt] key=%s -> val=%s",
1504 if (s->type == MAPTYPE_RND && *value) {
1505 value = select_random_value_part(r, value);
1506 rewritelog((r, 5, NULL, "randomly chosen the subvalue `%s'",value));
1509 return *value ? value : NULL;
1515 rv = apr_stat(&st, s->checkfile, APR_FINFO_MIN, r->pool);
1516 if (rv != APR_SUCCESS) {
1517 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
1518 "mod_rewrite: can't access DBM RewriteMap file %s",
1520 rewritelog((r, 1, NULL,
1521 "can't open DBM RewriteMap file, see error log"));
1525 value = get_cache_value(name, st.mtime, key, r->pool);
1527 rewritelog((r, 6, NULL,
1528 "cache lookup FAILED, forcing new map lookup"));
1530 value = lookup_map_dbmfile(r, s->datafile, s->dbmtype, key);
1532 rewritelog((r, 5, NULL, "map lookup FAILED: map=%s[dbm] key=%s",
1534 set_cache_value(name, st.mtime, key, "");
1538 rewritelog((r, 5, NULL, "map lookup OK: map=%s[dbm] key=%s -> "
1539 "val=%s", name, key, value));
1541 set_cache_value(name, st.mtime, key, value);
1545 rewritelog((r, 5, NULL, "cache lookup OK: map=%s[dbm] key=%s -> val=%s",
1547 return *value ? value : NULL;
1553 value = lookup_map_program(r, s->fpin, s->fpout, key);
1555 rewritelog((r, 5,NULL,"map lookup FAILED: map=%s key=%s", name,
1560 rewritelog((r, 5, NULL, "map lookup OK: map=%s key=%s -> val=%s",
1568 value = s->func(r, key);
1570 rewritelog((r, 5,NULL,"map lookup FAILED: map=%s key=%s", name,
1575 rewritelog((r, 5, NULL, "map lookup OK: map=%s key=%s -> val=%s",
1584 * lookup a HTTP header and set VARY note
1586 static const char *lookup_header(const char *name, rewrite_ctx *ctx)
1588 const char *val = apr_table_get(ctx->r->headers_in, name);
1591 ctx->vary_this = ctx->vary_this
1592 ? apr_pstrcat(ctx->r->pool, ctx->vary_this, ", ",
1594 : apr_pstrdup(ctx->r->pool, name);
1601 * lookahead helper function
1602 * Determine the correct URI path in perdir context
1604 static APR_INLINE const char *la_u(rewrite_ctx *ctx)
1606 rewrite_perdir_conf *conf;
1608 if (*ctx->uri == '/') {
1612 conf = ap_get_module_config(ctx->r->per_dir_config, &rewrite_module);
1614 return apr_pstrcat(ctx->r->pool, conf->baseurl
1615 ? conf->baseurl : conf->directory,
1620 * generic variable lookup
1622 static char *lookup_variable(char *var, rewrite_ctx *ctx)
1625 request_rec *r = ctx->r;
1626 apr_size_t varlen = strlen(var);
1630 return apr_pstrdup(r->pool, "");
1635 /* fast tests for variable length variables (sic) first */
1636 if (var[3] == ':') {
1637 if (var[4] && !strncasecmp(var, "ENV", 3)) {
1639 result = apr_table_get(r->notes, var);
1642 result = apr_table_get(r->subprocess_env, var);
1645 result = getenv(var);
1649 else if (var[4] == ':') {
1654 if (!strncasecmp(var, "HTTP", 4)) {
1655 result = lookup_header(var+5, ctx);
1657 else if (!strncasecmp(var, "LA-U", 4)) {
1658 if (ctx->uri && subreq_ok(r)) {
1659 path = ctx->perdir ? la_u(ctx) : ctx->uri;
1660 rr = ap_sub_req_lookup_uri(path, r, NULL);
1662 result = apr_pstrdup(r->pool, lookup_variable(var+5, ctx));
1664 ap_destroy_sub_req(rr);
1666 rewritelog((r, 5, ctx->perdir, "lookahead: path=%s var=%s "
1667 "-> val=%s", path, var+5, result));
1669 return (char *)result;
1672 else if (!strncasecmp(var, "LA-F", 4)) {
1673 if (ctx->uri && subreq_ok(r)) {
1675 if (ctx->perdir && *path == '/') {
1676 /* sigh, the user wants a file based subrequest, but
1677 * we can't do one, since we don't know what the file
1678 * path is! In this case behave like LA-U.
1680 rr = ap_sub_req_lookup_uri(path, r, NULL);
1684 rewrite_perdir_conf *conf;
1686 conf = ap_get_module_config(r->per_dir_config,
1689 path = apr_pstrcat(r->pool, conf->directory, path,
1693 rr = ap_sub_req_lookup_file(path, r, NULL);
1697 result = apr_pstrdup(r->pool, lookup_variable(var+5, ctx));
1699 ap_destroy_sub_req(rr);
1701 rewritelog((r, 5, ctx->perdir, "lookahead: path=%s var=%s "
1702 "-> val=%s", path, var+5, result));
1704 return (char *)result;
1710 /* well, do it the hard way */
1715 /* can't do this above, because of the getenv call */
1716 for (p = var; *p; ++p) {
1717 *p = apr_toupper(*p);
1722 if (!strcmp(var, "TIME")) {
1723 apr_time_exp_lt(&tm, apr_time_now());
1724 result = apr_psprintf(r->pool, "%04d%02d%02d%02d%02d%02d",
1725 tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday,
1726 tm.tm_hour, tm.tm_min, tm.tm_sec);
1727 rewritelog((r, 1, ctx->perdir, "RESULT='%s'", result));
1728 return (char *)result;
1735 if (!strcmp(var, "TIME_DAY")) {
1736 apr_time_exp_lt(&tm, apr_time_now());
1737 return apr_psprintf(r->pool, "%02d", tm.tm_mday);
1742 if (!strcmp(var, "TIME_SEC")) {
1743 apr_time_exp_lt(&tm, apr_time_now());
1744 return apr_psprintf(r->pool, "%02d", tm.tm_sec);
1749 if (!strcmp(var, "TIME_MIN")) {
1750 apr_time_exp_lt(&tm, apr_time_now());
1751 return apr_psprintf(r->pool, "%02d", tm.tm_min);
1756 if (!strcmp(var, "TIME_MON")) {
1757 apr_time_exp_lt(&tm, apr_time_now());
1758 return apr_psprintf(r->pool, "%02d", tm.tm_mon+1);
1767 if (var[8] == 'Y' && !strcmp(var, "TIME_WDAY")) {
1768 apr_time_exp_lt(&tm, apr_time_now());
1769 return apr_psprintf(r->pool, "%d", tm.tm_wday);
1771 else if (!strcmp(var, "TIME_YEAR")) {
1772 apr_time_exp_lt(&tm, apr_time_now());
1773 return apr_psprintf(r->pool, "%04d", tm.tm_year+1900);
1778 if (!strcmp(var, "IS_SUBREQ")) {
1779 result = (r->main ? "true" : "false");
1784 if (!strcmp(var, "PATH_INFO")) {
1785 result = r->path_info;
1790 if (!strcmp(var, "AUTH_TYPE")) {
1791 result = r->ap_auth_type;
1796 if (!strcmp(var, "HTTP_HOST")) {
1797 result = lookup_header("Host", ctx);
1802 if (!strcmp(var, "TIME_HOUR")) {
1803 apr_time_exp_lt(&tm, apr_time_now());
1804 return apr_psprintf(r->pool, "%02d", tm.tm_hour);
1813 if (!strcmp(var, "SERVER_NAME")) {
1814 result = ap_get_server_name(r);
1819 if (*var == 'R' && !strcmp(var, "REMOTE_ADDR")) {
1820 result = r->connection->remote_ip;
1822 else if (!strcmp(var, "SERVER_ADDR")) {
1823 result = r->connection->local_ip;
1828 if (*var == 'H' && !strcmp(var, "HTTP_ACCEPT")) {
1829 result = lookup_header("Accept", ctx);
1831 else if (!strcmp(var, "THE_REQUEST")) {
1832 result = r->the_request;
1837 if (!strcmp(var, "API_VERSION")) {
1838 return apr_psprintf(r->pool, "%d:%d",
1839 MODULE_MAGIC_NUMBER_MAJOR,
1840 MODULE_MAGIC_NUMBER_MINOR);
1845 if (!strcmp(var, "HTTP_COOKIE")) {
1846 result = lookup_header("Cookie", ctx);
1851 if (*var == 'S' && !strcmp(var, "SERVER_PORT")) {
1852 return apr_psprintf(r->pool, "%u", ap_get_server_port(r));
1854 else if (var[7] == 'H' && !strcmp(var, "REMOTE_HOST")) {
1855 result = ap_get_remote_host(r->connection,r->per_dir_config,
1858 else if (!strcmp(var, "REMOTE_PORT")) {
1859 return apr_itoa(r->pool, r->connection->remote_addr->port);
1864 if (*var == 'R' && !strcmp(var, "REMOTE_USER")) {
1867 else if (!strcmp(var, "SCRIPT_USER")) {
1868 result = "<unknown>";
1869 if (r->finfo.valid & APR_FINFO_USER) {
1870 apr_uid_name_get((char **)&result, r->finfo.user,
1877 if (!strcmp(var, "REQUEST_URI")) {
1887 if (!strcmp(var, "SCRIPT_GROUP")) {
1888 result = "<unknown>";
1889 if (r->finfo.valid & APR_FINFO_GROUP) {
1890 apr_gid_name_get((char **)&result, r->finfo.group,
1897 if (!strcmp(var, "REMOTE_IDENT")) {
1898 result = ap_get_remote_logname(r);
1903 if (!strcmp(var, "HTTP_REFERER")) {
1904 result = lookup_header("Referer", ctx);
1909 if (!strcmp(var, "QUERY_STRING")) {
1915 if (!strcmp(var, "SERVER_ADMIN")) {
1916 result = r->server->server_admin;
1923 if (!strcmp(var, "DOCUMENT_ROOT")) {
1924 result = ap_document_root(r);
1929 if (*var == 'H' && !strcmp(var, "HTTP_FORWARDED")) {
1930 result = lookup_header("Forwarded", ctx);
1932 else if (!strcmp(var, "REQUEST_METHOD")) {
1940 if (!strcmp(var, "HTTP_USER_AGENT")) {
1941 result = lookup_header("User-Agent", ctx);
1946 if (!strcmp(var, "SCRIPT_FILENAME")) {
1947 result = r->filename; /* same as request_filename (16) */
1952 if (!strcmp(var, "SERVER_PROTOCOL")) {
1953 result = r->protocol;
1958 if (!strcmp(var, "SERVER_SOFTWARE")) {
1959 result = ap_get_server_version();
1966 if (!strcmp(var, "REQUEST_FILENAME")) {
1967 result = r->filename; /* same as script_filename (15) */
1972 if (!strcmp(var, "HTTP_PROXY_CONNECTION")) {
1973 result = lookup_header("Proxy-Connection", ctx);
1979 return apr_pstrdup(r->pool, result ? result : "");
1984 * +-------------------------------------------------------+
1986 * | Expansion functions
1988 * +-------------------------------------------------------+
1992 * Bracketed expression handling
1993 * s points after the opening bracket
1995 static APR_INLINE char *find_closing_curly(char *s)
1999 for (depth = 1; *s; ++s) {
2000 if (*s == RIGHT_CURLY && --depth == 0) {
2003 else if (*s == LEFT_CURLY) {
2011 static APR_INLINE char *find_char_in_curlies(char *s, int c)
2015 for (depth = 1; *s; ++s) {
2016 if (*s == c && depth == 1) {
2019 else if (*s == RIGHT_CURLY && --depth == 0) {
2022 else if (*s == LEFT_CURLY) {
2030 /* perform all the expansions on the input string
2031 * putting the result into a new string
2033 * for security reasons this expansion must be performed in a
2034 * single pass, otherwise an attacker can arrange for the result
2035 * of an earlier expansion to include expansion specifiers that
2036 * are interpreted by a later expansion, producing results that
2037 * were not intended by the administrator.
2039 static char *do_expand(char *input, rewrite_ctx *ctx)
2041 result_list *result, *current;
2042 result_list sresult[SMALL_EXPANSION];
2044 apr_size_t span, inputlen, outlen;
2046 apr_pool_t *pool = ctx->r->pool;
2048 span = strcspn(input, "\\$%");
2049 inputlen = strlen(input);
2052 if (inputlen == span) {
2053 return apr_pstrdup(pool, input);
2056 /* well, actually something to do */
2057 result = current = &(sresult[spc++]);
2060 current->next = NULL;
2061 current->string = input;
2062 current->len = span;
2065 /* loop for specials */
2067 /* prepare next entry */
2069 current->next = (spc < SMALL_EXPANSION)
2071 : (result_list *)apr_palloc(pool,
2072 sizeof(result_list));
2073 current = current->next;
2074 current->next = NULL;
2078 /* escaped character */
2083 current->string = p;
2087 current->string = ++p;
2092 /* variable or map lookup */
2093 else if (p[1] == '{') {
2096 endp = find_closing_curly(p+2);
2099 current->string = p;
2104 /* variable lookup */
2105 else if (*p == '%') {
2106 p = lookup_variable(apr_pstrmemdup(pool, p+2, endp-p-2), ctx);
2109 current->len = span;
2110 current->string = p;
2116 else { /* *p == '$' */
2120 * To make rewrite maps useful, the lookup key and
2121 * default values must be expanded, so we make
2122 * recursive calls to do the work. For security
2123 * reasons we must never expand a string that includes
2124 * verbatim data from the network. The recursion here
2125 * isn't a problem because the result of expansion is
2126 * only passed to lookup_map() so it cannot be
2127 * re-expanded, only re-looked-up. Another way of
2128 * looking at it is that the recursion is entirely
2129 * driven by the syntax of the nested curly brackets.
2132 key = find_char_in_curlies(p+2, ':');
2135 current->string = p;
2142 map = apr_pstrmemdup(pool, p+2, endp-p-2);
2143 key = map + (key-p-2);
2145 dflt = find_char_in_curlies(key, '|');
2150 /* reuse of key variable as result */
2151 key = lookup_map(ctx->r, map, do_expand(key, ctx));
2153 if (!key && dflt && *dflt) {
2154 key = do_expand(dflt, ctx);
2159 current->len = span;
2160 current->string = key;
2170 else if (apr_isdigit(p[1])) {
2172 backrefinfo *bri = (*p == '$') ? &ctx->briRR : &ctx->briRC;
2174 /* see ap_pregsub() in server/util.c */
2175 if (bri->source && n < AP_MAX_REG_MATCH
2176 && bri->regmatch[n].rm_eo > bri->regmatch[n].rm_so) {
2177 span = bri->regmatch[n].rm_eo - bri->regmatch[n].rm_so;
2179 current->len = span;
2180 current->string = bri->source + bri->regmatch[n].rm_so;
2187 /* not for us, just copy it */
2190 current->string = p++;
2194 /* check the remainder */
2195 if (*p && (span = strcspn(p, "\\$%")) > 0) {
2197 current->next = (spc < SMALL_EXPANSION)
2199 : (result_list *)apr_palloc(pool,
2200 sizeof(result_list));
2201 current = current->next;
2202 current->next = NULL;
2205 current->len = span;
2206 current->string = p;
2211 } while (p < input+inputlen);
2213 /* assemble result */
2214 c = p = apr_palloc(pool, outlen + 1); /* don't forget the \0 */
2217 ap_assert(c+result->len <= p+outlen); /* XXX: can be removed after
2218 * extensive testing and
2221 memcpy(c, result->string, result->len);
2224 result = result->next;
2233 * perform all the expansions on the environment variables
2235 static void do_expand_env(data_item *env, rewrite_ctx *ctx)
2240 name = do_expand(env->data, ctx);
2241 if ((val = ap_strchr(name, ':')) != NULL) {
2244 apr_table_set(ctx->r->subprocess_env, name, val);
2245 rewritelog((ctx->r, 5, NULL, "setting env variable '%s' to '%s'",
2256 * perform all the expansions on the cookies
2258 * TODO: use cached time similar to how logging does it
2260 static void add_cookie(request_rec *r, char *s)
2271 var = apr_strtok(s, ":", &tok_cntx);
2272 val = apr_strtok(NULL, ":", &tok_cntx);
2273 domain = apr_strtok(NULL, ":", &tok_cntx);
2275 if (var && val && domain) {
2276 request_rec *rmain = r;
2280 while (rmain->main) {
2281 rmain = rmain->main;
2284 notename = apr_pstrcat(rmain->pool, var, "_rewrite", NULL);
2285 apr_pool_userdata_get(&data, notename, rmain->pool);
2287 char *exp_time = NULL;
2289 expires = apr_strtok(NULL, ":", &tok_cntx);
2290 path = expires ? apr_strtok(NULL, ":", &tok_cntx) : NULL;
2294 apr_time_exp_gmt(&tms, r->request_time
2295 + apr_time_from_sec((60 * atol(expires))));
2296 exp_time = apr_psprintf(r->pool, "%s, %.2d-%s-%.4d "
2297 "%.2d:%.2d:%.2d GMT",
2298 apr_day_snames[tms.tm_wday],
2300 apr_month_snames[tms.tm_mon],
2302 tms.tm_hour, tms.tm_min, tms.tm_sec);
2305 cookie = apr_pstrcat(rmain->pool,
2307 "; path=", path ? path : "/",
2308 "; domain=", domain,
2309 expires ? "; expires=" : NULL,
2310 expires ? exp_time : NULL,
2313 apr_table_addn(rmain->err_headers_out, "Set-Cookie", cookie);
2314 apr_pool_userdata_set("set", notename, NULL, rmain->pool);
2315 rewritelog((rmain, 5, NULL, "setting cookie '%s'", cookie));
2318 rewritelog((rmain, 5, NULL, "skipping already set cookie '%s'",
2326 static void do_expand_cookie(data_item *cookie, rewrite_ctx *ctx)
2329 add_cookie(ctx->r, do_expand(cookie->data, ctx));
2330 cookie = cookie->next;
2338 * Expand tilde-paths (/~user) through Unix /etc/passwd
2339 * database information (or other OS-specific database)
2341 static char *expand_tildepaths(request_rec *r, char *uri)
2343 if (uri && *uri == '/' && uri[1] == '~') {
2347 while (*p && *p != '/') {
2354 user = apr_pstrmemdup(r->pool, user, p-user);
2355 if (apr_uid_homepath_get(&homedir, user, r->pool) == APR_SUCCESS) {
2357 /* reuse of user variable */
2358 user = homedir + strlen(homedir) - 1;
2359 if (user >= homedir && *user == '/') {
2363 return apr_pstrcat(r->pool, homedir, p, NULL);
2374 #endif /* if APR_HAS_USER */
2378 * +-------------------------------------------------------+
2380 * | rewriting lockfile support
2382 * +-------------------------------------------------------+
2385 static apr_status_t rewritelock_create(server_rec *s, apr_pool_t *p)
2389 /* only operate if a lockfile is used */
2390 if (lockname == NULL || *(lockname) == '\0') {
2394 /* create the lockfile */
2395 rc = apr_global_mutex_create(&rewrite_mapr_lock_acquire, lockname,
2396 APR_LOCK_DEFAULT, p);
2397 if (rc != APR_SUCCESS) {
2398 ap_log_error(APLOG_MARK, APLOG_CRIT, rc, s,
2399 "mod_rewrite: Parent could not create RewriteLock "
2400 "file %s", lockname);
2404 #ifdef MOD_REWRITE_SET_MUTEX_PERMS
2405 rc = unixd_set_global_mutex_perms(rewrite_mapr_lock_acquire);
2406 if (rc != APR_SUCCESS) {
2407 ap_log_error(APLOG_MARK, APLOG_CRIT, rc, s,
2408 "mod_rewrite: Parent could not set permissions "
2409 "on RewriteLock; check User and Group directives");
2417 static apr_status_t rewritelock_remove(void *data)
2419 /* only operate if a lockfile is used */
2420 if (lockname == NULL || *(lockname) == '\0') {
2424 /* destroy the rewritelock */
2425 apr_global_mutex_destroy (rewrite_mapr_lock_acquire);
2426 rewrite_mapr_lock_acquire = NULL;
2433 * +-------------------------------------------------------+
2435 * | configuration directive handling
2437 * +-------------------------------------------------------+
2441 * own command line parser for RewriteRule and RewriteCond,
2442 * which doesn't have the '\\' problem.
2443 * (returns true on error)
2445 * XXX: what an inclined parser. Seems we have to leave it so
2446 * for backwards compat. *sigh*
2448 static int parseargline(char *str, char **a1, char **a2, char **a3)
2452 while (apr_isspace(*str)) {
2457 * determine first argument
2459 quote = (*str == '"' || *str == '\'') ? *str++ : '\0';
2462 for (; *str; ++str) {
2463 if ((apr_isspace(*str) && !quote) || (*str == quote)) {
2466 if (*str == '\\' && apr_isspace(str[1])) {
2477 while (apr_isspace(*str)) {
2482 * determine second argument
2484 quote = (*str == '"' || *str == '\'') ? *str++ : '\0';
2487 for (; *str; ++str) {
2488 if ((apr_isspace(*str) && !quote) || (*str == quote)) {
2491 if (*str == '\\' && apr_isspace(str[1])) {
2498 *a3 = NULL; /* 3rd argument is optional */
2503 while (apr_isspace(*str)) {
2508 *a3 = NULL; /* 3rd argument is still optional */
2513 * determine third argument
2515 quote = (*str == '"' || *str == '\'') ? *str++ : '\0';
2517 for (; *str; ++str) {
2518 if ((apr_isspace(*str) && !quote) || (*str == quote)) {
2521 if (*str == '\\' && apr_isspace(str[1])) {
2531 static void *config_server_create(apr_pool_t *p, server_rec *s)
2533 rewrite_server_conf *a;
2535 a = (rewrite_server_conf *)apr_pcalloc(p, sizeof(rewrite_server_conf));
2537 a->state = ENGINE_DISABLED;
2538 a->options = OPTION_NONE;
2539 #ifndef REWRITELOG_DISABLED
2540 a->rewritelogfile = NULL;
2541 a->rewritelogfp = NULL;
2542 a->rewriteloglevel = 0;
2544 a->rewritemaps = apr_hash_make(p);
2545 a->rewriteconds = apr_array_make(p, 2, sizeof(rewritecond_entry));
2546 a->rewriterules = apr_array_make(p, 2, sizeof(rewriterule_entry));
2548 a->redirect_limit = 0; /* unset (use default) */
2553 static void *config_server_merge(apr_pool_t *p, void *basev, void *overridesv)
2555 rewrite_server_conf *a, *base, *overrides;
2557 a = (rewrite_server_conf *)apr_pcalloc(p,
2558 sizeof(rewrite_server_conf));
2559 base = (rewrite_server_conf *)basev;
2560 overrides = (rewrite_server_conf *)overridesv;
2562 a->state = overrides->state;
2563 a->options = overrides->options;
2564 a->server = overrides->server;
2565 a->redirect_limit = overrides->redirect_limit
2566 ? overrides->redirect_limit
2567 : base->redirect_limit;
2569 if (a->options & OPTION_INHERIT) {
2571 * local directives override
2572 * and anything else is inherited
2574 #ifndef REWRITELOG_DISABLED
2575 a->rewriteloglevel = overrides->rewriteloglevel != 0
2576 ? overrides->rewriteloglevel
2577 : base->rewriteloglevel;
2578 a->rewritelogfile = overrides->rewritelogfile != NULL
2579 ? overrides->rewritelogfile
2580 : base->rewritelogfile;
2581 a->rewritelogfp = overrides->rewritelogfp != NULL
2582 ? overrides->rewritelogfp
2583 : base->rewritelogfp;
2585 a->rewritemaps = apr_hash_overlay(p, overrides->rewritemaps,
2587 a->rewriteconds = apr_array_append(p, overrides->rewriteconds,
2588 base->rewriteconds);
2589 a->rewriterules = apr_array_append(p, overrides->rewriterules,
2590 base->rewriterules);
2594 * local directives override
2595 * and anything else gets defaults
2597 #ifndef REWRITELOG_DISABLED
2598 a->rewriteloglevel = overrides->rewriteloglevel;
2599 a->rewritelogfile = overrides->rewritelogfile;
2600 a->rewritelogfp = overrides->rewritelogfp;
2602 a->rewritemaps = overrides->rewritemaps;
2603 a->rewriteconds = overrides->rewriteconds;
2604 a->rewriterules = overrides->rewriterules;
2610 static void *config_perdir_create(apr_pool_t *p, char *path)
2612 rewrite_perdir_conf *a;
2614 a = (rewrite_perdir_conf *)apr_pcalloc(p, sizeof(rewrite_perdir_conf));
2616 a->state = ENGINE_DISABLED;
2617 a->options = OPTION_NONE;
2619 a->rewriteconds = apr_array_make(p, 2, sizeof(rewritecond_entry));
2620 a->rewriterules = apr_array_make(p, 2, sizeof(rewriterule_entry));
2621 a->redirect_limit = 0; /* unset (use server config) */
2624 a->directory = NULL;
2627 /* make sure it has a trailing slash */
2628 if (path[strlen(path)-1] == '/') {
2629 a->directory = apr_pstrdup(p, path);
2632 a->directory = apr_pstrcat(p, path, "/", NULL);
2639 static void *config_perdir_merge(apr_pool_t *p, void *basev, void *overridesv)
2641 rewrite_perdir_conf *a, *base, *overrides;
2643 a = (rewrite_perdir_conf *)apr_pcalloc(p,
2644 sizeof(rewrite_perdir_conf));
2645 base = (rewrite_perdir_conf *)basev;
2646 overrides = (rewrite_perdir_conf *)overridesv;
2648 a->state = overrides->state;
2649 a->options = overrides->options;
2650 a->directory = overrides->directory;
2651 a->baseurl = overrides->baseurl;
2652 a->redirect_limit = overrides->redirect_limit
2653 ? overrides->redirect_limit
2654 : base->redirect_limit;
2656 if (a->options & OPTION_INHERIT) {
2657 a->rewriteconds = apr_array_append(p, overrides->rewriteconds,
2658 base->rewriteconds);
2659 a->rewriterules = apr_array_append(p, overrides->rewriterules,
2660 base->rewriterules);
2663 a->rewriteconds = overrides->rewriteconds;
2664 a->rewriterules = overrides->rewriterules;
2670 static const char *cmd_rewriteengine(cmd_parms *cmd,
2671 void *in_dconf, int flag)
2673 rewrite_perdir_conf *dconf = in_dconf;
2674 rewrite_server_conf *sconf;
2676 sconf = ap_get_module_config(cmd->server->module_config, &rewrite_module);
2678 if (cmd->path == NULL) { /* is server command */
2679 sconf->state = (flag ? ENGINE_ENABLED : ENGINE_DISABLED);
2681 else /* is per-directory command */ {
2682 dconf->state = (flag ? ENGINE_ENABLED : ENGINE_DISABLED);
2688 static const char *cmd_rewriteoptions(cmd_parms *cmd,
2689 void *in_dconf, const char *option)
2691 int options = 0, limit = 0;
2695 w = ap_getword_conf(cmd->pool, &option);
2697 if (!strcasecmp(w, "inherit")) {
2698 options |= OPTION_INHERIT;
2700 else if (!strncasecmp(w, "MaxRedirects=", 13)) {
2701 limit = atoi(&w[13]);
2703 return "RewriteOptions: MaxRedirects takes a number greater "
2707 else if (!strcasecmp(w, "MaxRedirects")) { /* be nice */
2708 return "RewriteOptions: MaxRedirects has the format MaxRedirects"
2712 return apr_pstrcat(cmd->pool, "RewriteOptions: unknown option '",
2717 /* put it into the appropriate config */
2718 if (cmd->path == NULL) { /* is server command */
2719 rewrite_server_conf *conf =
2720 ap_get_module_config(cmd->server->module_config,
2723 conf->options |= options;
2724 conf->redirect_limit = limit;
2726 else { /* is per-directory command */
2727 rewrite_perdir_conf *conf = in_dconf;
2729 conf->options |= options;
2730 conf->redirect_limit = limit;
2736 #ifndef REWRITELOG_DISABLED
2737 static const char *cmd_rewritelog(cmd_parms *cmd, void *dconf, const char *a1)
2739 rewrite_server_conf *sconf;
2741 sconf = ap_get_module_config(cmd->server->module_config, &rewrite_module);
2742 sconf->rewritelogfile = a1;
2747 static const char *cmd_rewriteloglevel(cmd_parms *cmd, void *dconf,
2750 rewrite_server_conf *sconf;
2752 sconf = ap_get_module_config(cmd->server->module_config, &rewrite_module);
2753 sconf->rewriteloglevel = atoi(a1);
2757 #endif /* rewritelog */
2759 static const char *cmd_rewritemap(cmd_parms *cmd, void *dconf, const char *a1,
2762 rewrite_server_conf *sconf;
2763 rewritemap_entry *newmap;
2767 sconf = ap_get_module_config(cmd->server->module_config, &rewrite_module);
2769 newmap = apr_palloc(cmd->pool, sizeof(rewritemap_entry));
2770 newmap->func = NULL;
2772 if (strncasecmp(a2, "txt:", 4) == 0) {
2773 if ((fname = ap_server_root_relative(cmd->pool, a2+4)) == NULL) {
2774 return apr_pstrcat(cmd->pool, "RewriteMap: bad path to txt map: ",
2778 newmap->type = MAPTYPE_TXT;
2779 newmap->datafile = fname;
2780 newmap->checkfile = fname;
2782 else if (strncasecmp(a2, "rnd:", 4) == 0) {
2783 if ((fname = ap_server_root_relative(cmd->pool, a2+4)) == NULL) {
2784 return apr_pstrcat(cmd->pool, "RewriteMap: bad path to rnd map: ",
2788 newmap->type = MAPTYPE_RND;
2789 newmap->datafile = fname;
2790 newmap->checkfile = fname;
2792 else if (strncasecmp(a2, "dbm", 3) == 0) {
2793 const char *ignored_fname;
2796 newmap->type = MAPTYPE_DBM;
2800 newmap->dbmtype = "default";
2803 else if (a2[3] == '=') {
2804 const char *colon = ap_strchr_c(a2 + 4, ':');
2807 newmap->dbmtype = apr_pstrndup(cmd->pool, a2 + 4,
2808 colon - (a2 + 3) - 1);
2814 return apr_pstrcat(cmd->pool, "RewriteMap: bad map:",
2818 if ((newmap->datafile = ap_server_root_relative(cmd->pool,
2820 return apr_pstrcat(cmd->pool, "RewriteMap: bad path to dbm map: ",
2824 rv = apr_dbm_get_usednames_ex(cmd->pool, newmap->dbmtype,
2825 newmap->datafile, &newmap->checkfile,
2827 if (rv != APR_SUCCESS) {
2828 return apr_pstrcat(cmd->pool, "RewriteMap: dbm type ",
2829 newmap->dbmtype, " is invalid", NULL);
2832 else if (strncasecmp(a2, "prg:", 4) == 0) {
2833 apr_tokenize_to_argv(a2 + 4, &newmap->argv, cmd->pool);
2835 fname = newmap->argv[0];
2836 if ((newmap->argv[0] = ap_server_root_relative(cmd->pool,
2838 return apr_pstrcat(cmd->pool, "RewriteMap: bad path to prg map: ",
2842 newmap->type = MAPTYPE_PRG;
2843 newmap->datafile = NULL;
2844 newmap->checkfile = newmap->argv[0];
2846 else if (strncasecmp(a2, "int:", 4) == 0) {
2847 newmap->type = MAPTYPE_INT;
2848 newmap->datafile = NULL;
2849 newmap->checkfile = NULL;
2850 newmap->func = (char *(*)(request_rec *,char *))
2851 apr_hash_get(mapfunc_hash, a2+4, strlen(a2+4));
2852 if ((sconf->state == ENGINE_ENABLED) && (newmap->func == NULL)) {
2853 return apr_pstrcat(cmd->pool, "RewriteMap: internal map not found:",
2858 if ((fname = ap_server_root_relative(cmd->pool, a2)) == NULL) {
2859 return apr_pstrcat(cmd->pool, "RewriteMap: bad path to txt map: ",
2863 newmap->type = MAPTYPE_TXT;
2864 newmap->datafile = fname;
2865 newmap->checkfile = fname;
2867 newmap->fpin = NULL;
2868 newmap->fpout = NULL;
2870 if (newmap->checkfile && (sconf->state == ENGINE_ENABLED)
2871 && (apr_stat(&st, newmap->checkfile, APR_FINFO_MIN,
2872 cmd->pool) != APR_SUCCESS)) {
2873 return apr_pstrcat(cmd->pool,
2874 "RewriteMap: file for map ", a1,
2875 " not found:", newmap->checkfile, NULL);
2878 apr_hash_set(sconf->rewritemaps, a1, APR_HASH_KEY_STRING, newmap);
2883 static const char *cmd_rewritelock(cmd_parms *cmd, void *dconf, const char *a1)
2887 if ((error = ap_check_cmd_context(cmd, GLOBAL_ONLY)) != NULL)
2890 /* fixup the path, especially for rewritelock_remove() */
2891 lockname = ap_server_root_relative(cmd->pool, a1);
2894 return apr_pstrcat(cmd->pool, "Invalid RewriteLock path ", a1);
2900 static const char *cmd_rewritebase(cmd_parms *cmd, void *in_dconf,
2903 rewrite_perdir_conf *dconf = in_dconf;
2905 if (cmd->path == NULL || dconf == NULL) {
2906 return "RewriteBase: only valid in per-directory config files";
2908 if (a1[0] == '\0') {
2909 return "RewriteBase: empty URL not allowed";
2912 return "RewriteBase: argument is not a valid URL";
2915 dconf->baseurl = a1;
2921 * generic lexer for RewriteRule and RewriteCond flags.
2922 * The parser will be passed in as a function pointer
2923 * and called if a flag was found
2925 static const char *cmd_parseflagfield(apr_pool_t *p, void *cfg, char *key,
2926 const char *(*parse)(apr_pool_t *,
2930 char *val, *nextp, *endp;
2933 endp = key + strlen(key) - 1;
2934 if (*key != '[' || *endp != ']') {
2935 return "RewriteCond: bad flag delimiters";
2938 *endp = ','; /* for simpler parsing */
2942 /* skip leading spaces */
2943 while (apr_isspace(*key)) {
2947 if (!*key || (nextp = ap_strchr(key, ',')) == NULL) { /* NULL should not
2953 /* strip trailing spaces */
2955 while (apr_isspace(*endp)) {
2960 /* split key and val */
2961 val = ap_strchr(key, '=');
2969 err = parse(p, cfg, key, val);
2980 static const char *cmd_rewritecond_setflag(apr_pool_t *p, void *_cfg,
2981 char *key, char *val)
2983 rewritecond_entry *cfg = _cfg;
2985 if ( strcasecmp(key, "nocase") == 0
2986 || strcasecmp(key, "NC") == 0 ) {
2987 cfg->flags |= CONDFLAG_NOCASE;
2989 else if ( strcasecmp(key, "ornext") == 0
2990 || strcasecmp(key, "OR") == 0 ) {
2991 cfg->flags |= CONDFLAG_ORNEXT;
2994 return apr_pstrcat(p, "RewriteCond: unknown flag '", key, "'", NULL);
2999 static const char *cmd_rewritecond(cmd_parms *cmd, void *in_dconf,
3002 rewrite_perdir_conf *dconf = in_dconf;
3003 char *str = apr_pstrdup(cmd->pool, in_str);
3004 rewrite_server_conf *sconf;
3005 rewritecond_entry *newcond;
3012 sconf = ap_get_module_config(cmd->server->module_config, &rewrite_module);
3014 /* make a new entry in the internal temporary rewrite rule list */
3015 if (cmd->path == NULL) { /* is server command */
3016 newcond = apr_array_push(sconf->rewriteconds);
3018 else { /* is per-directory command */
3019 newcond = apr_array_push(dconf->rewriteconds);
3022 /* parse the argument line ourself
3023 * a1 .. a3 are substrings of str, which is a fresh copy
3024 * of the argument line. So we can use a1 .. a3 without
3025 * copying them again.
3027 if (parseargline(str, &a1, &a2, &a3)) {
3028 return apr_pstrcat(cmd->pool, "RewriteCond: bad argument line '", str,
3032 /* arg1: the input string */
3033 newcond->input = a1;
3035 /* arg3: optional flags field
3036 * (this has to be parsed first, because we need to
3037 * know if the regex should be compiled with ICASE!)
3039 newcond->flags = CONDFLAG_NONE;
3041 if ((err = cmd_parseflagfield(cmd->pool, newcond, a3,
3042 cmd_rewritecond_setflag)) != NULL) {
3047 /* arg2: the pattern */
3049 newcond->flags |= CONDFLAG_NOTMATCH;
3053 /* determine the pattern type */
3056 if (!a2[2] && *a2 == '-') {
3058 case 'f': newcond->ptype = CONDPAT_FILE_EXISTS; break;
3059 case 's': newcond->ptype = CONDPAT_FILE_SIZE; break;
3060 case 'l': newcond->ptype = CONDPAT_FILE_LINK; break;
3061 case 'd': newcond->ptype = CONDPAT_FILE_DIR; break;
3062 case 'x': newcond->ptype = CONDPAT_FILE_XBIT; break;
3063 case 'U': newcond->ptype = CONDPAT_LU_URL; break;
3064 case 'F': newcond->ptype = CONDPAT_LU_FILE; break;
3069 case '>': newcond->ptype = CONDPAT_STR_GT; break;
3070 case '<': newcond->ptype = CONDPAT_STR_LT; break;
3071 case '=': newcond->ptype = CONDPAT_STR_EQ;
3072 /* "" represents an empty string */
3073 if (*++a2 == '"' && a2[1] == '"' && !a2[2]) {
3081 if (newcond->ptype && newcond->ptype != CONDPAT_STR_EQ &&
3082 (newcond->flags & CONDFLAG_NOCASE)) {
3083 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server,
3084 "RewriteCond: NoCase option for non-regex pattern '%s' "
3085 "is not supported and will be ignored.", a2);
3086 newcond->flags &= ~CONDFLAG_NOCASE;
3089 newcond->pattern = a2;
3091 if (!newcond->ptype) {
3092 regexp = ap_pregcomp(cmd->pool, a2,
3093 REG_EXTENDED | ((newcond->flags & CONDFLAG_NOCASE)
3096 return apr_pstrcat(cmd->pool, "RewriteCond: cannot compile regular "
3097 "expression '", a2, "'", NULL);
3100 newcond->regexp = regexp;
3106 static const char *cmd_rewriterule_setflag(apr_pool_t *p, void *_cfg,
3107 char *key, char *val)
3109 rewriterule_entry *cfg = _cfg;
3115 if (!*key || !strcasecmp(key, "hain")) { /* chain */
3116 cfg->flags |= RULEFLAG_CHAIN;
3118 else if (((*key == 'O' || *key == 'o') && !key[1])
3119 || !strcasecmp(key, "ookie")) { /* cookie */
3120 data_item *cp = cfg->cookie;
3123 cp = cfg->cookie = apr_palloc(p, sizeof(*cp));
3129 cp->next = apr_palloc(p, sizeof(*cp));
3143 if (!*key || !strcasecmp(key, "nv")) { /* env */
3144 data_item *cp = cfg->env;
3147 cp = cfg->env = apr_palloc(p, sizeof(*cp));
3153 cp->next = apr_palloc(p, sizeof(*cp));
3167 if (!*key || !strcasecmp(key, "orbidden")) { /* forbidden */
3168 cfg->flags |= (RULEFLAG_STATUS | RULEFLAG_NOSUB);
3169 cfg->forced_responsecode = HTTP_FORBIDDEN;
3178 if (!*key || !strcasecmp(key, "one")) { /* gone */
3179 cfg->flags |= (RULEFLAG_STATUS | RULEFLAG_NOSUB);
3180 cfg->forced_responsecode = HTTP_GONE;
3189 if (!*key || !strcasecmp(key, "andler")) { /* handler */
3190 cfg->forced_handler = val;
3199 if (!*key || !strcasecmp(key, "ast")) { /* last */
3200 cfg->flags |= RULEFLAG_LASTRULE;
3209 if (((*key == 'E' || *key == 'e') && !key[1])
3210 || !strcasecmp(key, "oescape")) { /* noescape */
3211 cfg->flags |= RULEFLAG_NOESCAPE;
3213 else if (!*key || !strcasecmp(key, "ext")) { /* next */
3214 cfg->flags |= RULEFLAG_NEWROUND;
3216 else if (((*key == 'S' || *key == 's') && !key[1])
3217 || !strcasecmp(key, "osubreq")) { /* nosubreq */
3218 cfg->flags |= RULEFLAG_IGNOREONSUBREQ;
3220 else if (((*key == 'C' || *key == 'c') && !key[1])
3221 || !strcasecmp(key, "ocase")) { /* nocase */
3222 cfg->flags |= RULEFLAG_NOCASE;
3231 if (!*key || !strcasecmp(key, "roxy")) { /* proxy */
3232 cfg->flags |= RULEFLAG_PROXY;
3234 else if (((*key == 'T' || *key == 't') && !key[1])
3235 || !strcasecmp(key, "assthrough")) { /* passthrough */
3236 cfg->flags |= RULEFLAG_PASSTHROUGH;
3245 if ( !strcasecmp(key, "QSA")
3246 || !strcasecmp(key, "qsappend")) { /* qsappend */
3247 cfg->flags |= RULEFLAG_QSAPPEND;
3256 if (!*key || !strcasecmp(key, "edirect")) { /* redirect */
3259 cfg->flags |= RULEFLAG_FORCEREDIRECT;
3260 if (strlen(val) > 0) {
3261 if (strcasecmp(val, "permanent") == 0) {
3262 status = HTTP_MOVED_PERMANENTLY;
3264 else if (strcasecmp(val, "temp") == 0) {
3265 status = HTTP_MOVED_TEMPORARILY;
3267 else if (strcasecmp(val, "seeother") == 0) {
3268 status = HTTP_SEE_OTHER;
3270 else if (apr_isdigit(*val)) {
3272 if (status != HTTP_INTERNAL_SERVER_ERROR) {
3274 ap_index_of_response(HTTP_INTERNAL_SERVER_ERROR);
3276 if (ap_index_of_response(status) == idx) {
3277 return apr_psprintf(p, "RewriteRule: invalid HTTP "
3278 "response code '%s' for "
3283 if (!ap_is_HTTP_REDIRECT(status)) {
3284 cfg->flags |= (RULEFLAG_STATUS | RULEFLAG_NOSUB);
3287 cfg->forced_responsecode = status;
3297 if (!*key || !strcasecmp(key, "kip")) { /* skip */
3298 cfg->skip = atoi(val);
3307 if (!*key || !strcasecmp(key, "ype")) { /* type */
3308 cfg->forced_mimetype = val;
3321 return apr_pstrcat(p, "RewriteRule: unknown flag '", --key, "'", NULL);
3327 static const char *cmd_rewriterule(cmd_parms *cmd, void *in_dconf,
3330 rewrite_perdir_conf *dconf = in_dconf;
3331 char *str = apr_pstrdup(cmd->pool, in_str);
3332 rewrite_server_conf *sconf;
3333 rewriterule_entry *newrule;
3340 sconf = ap_get_module_config(cmd->server->module_config, &rewrite_module);
3342 /* make a new entry in the internal rewrite rule list */
3343 if (cmd->path == NULL) { /* is server command */
3344 newrule = apr_array_push(sconf->rewriterules);
3346 else { /* is per-directory command */
3347 newrule = apr_array_push(dconf->rewriterules);
3350 /* parse the argument line ourself */
3351 if (parseargline(str, &a1, &a2, &a3)) {
3352 return apr_pstrcat(cmd->pool, "RewriteRule: bad argument line '", str,
3356 /* arg3: optional flags field */
3357 newrule->forced_mimetype = NULL;
3358 newrule->forced_handler = NULL;
3359 newrule->forced_responsecode = HTTP_MOVED_TEMPORARILY;
3360 newrule->flags = RULEFLAG_NONE;
3361 newrule->env = NULL;
3362 newrule->cookie = NULL;
3365 if ((err = cmd_parseflagfield(cmd->pool, newrule, a3,
3366 cmd_rewriterule_setflag)) != NULL) {
3371 /* arg1: the pattern
3372 * try to compile the regexp to test if is ok
3375 newrule->flags |= RULEFLAG_NOTMATCH;
3379 regexp = ap_pregcomp(cmd->pool, a1, REG_EXTENDED |
3380 ((newrule->flags & RULEFLAG_NOCASE)
3383 return apr_pstrcat(cmd->pool,
3384 "RewriteRule: cannot compile regular expression '",
3388 newrule->pattern = a1;
3389 newrule->regexp = regexp;
3391 /* arg2: the output string */
3392 newrule->output = a2;
3393 if (*a2 == '-' && !a2[1]) {
3394 newrule->flags |= RULEFLAG_NOSUB;
3397 /* now, if the server or per-dir config holds an
3398 * array of RewriteCond entries, we take it for us
3399 * and clear the array
3401 if (cmd->path == NULL) { /* is server command */
3402 newrule->rewriteconds = sconf->rewriteconds;
3403 sconf->rewriteconds = apr_array_make(cmd->pool, 2,
3404 sizeof(rewritecond_entry));
3406 else { /* is per-directory command */
3407 newrule->rewriteconds = dconf->rewriteconds;
3408 dconf->rewriteconds = apr_array_make(cmd->pool, 2,
3409 sizeof(rewritecond_entry));
3417 * +-------------------------------------------------------+
3419 * | the rewriting engine
3421 * +-------------------------------------------------------+
3424 /* Lexicographic Compare */
3425 static APR_INLINE int compare_lexicography(char *a, char *b)
3427 apr_size_t i, lena, lenb;
3433 for (i = 0; i < lena; ++i) {
3435 return ((unsigned char)a[i] > (unsigned char)b[i]) ? 1 : -1;
3442 return ((lena > lenb) ? 1 : -1);
3446 * Apply a single rewriteCond
3448 static int apply_rewrite_cond(rewritecond_entry *p, rewrite_ctx *ctx)
3450 char *input = do_expand(p->input, ctx);
3452 request_rec *rsub, *r = ctx->r;
3453 regmatch_t regmatch[AP_MAX_REG_MATCH];
3457 case CONDPAT_FILE_EXISTS:
3458 if ( apr_stat(&sb, input, APR_FINFO_MIN, r->pool) == APR_SUCCESS
3459 && sb.filetype == APR_REG) {
3464 case CONDPAT_FILE_SIZE:
3465 if ( apr_stat(&sb, input, APR_FINFO_MIN, r->pool) == APR_SUCCESS
3466 && sb.filetype == APR_REG && sb.size > 0) {
3471 case CONDPAT_FILE_LINK:
3473 if ( apr_stat(&sb, input, APR_FINFO_MIN | APR_FINFO_LINK,
3474 r->pool) == APR_SUCCESS
3475 && sb.filetype == APR_LNK) {
3481 case CONDPAT_FILE_DIR:
3482 if ( apr_stat(&sb, input, APR_FINFO_MIN, r->pool) == APR_SUCCESS
3483 && sb.filetype == APR_DIR) {
3488 case CONDPAT_FILE_XBIT:
3489 if ( apr_stat(&sb, input, APR_FINFO_PROT, r->pool) == APR_SUCCESS
3490 && (sb.protection & (APR_UEXECUTE | APR_GEXECUTE | APR_WEXECUTE))) {
3495 case CONDPAT_LU_URL:
3496 if (*input && subreq_ok(r)) {
3497 rsub = ap_sub_req_lookup_uri(input, r, NULL);
3498 if (rsub->status < 400) {
3501 rewritelog((r, 5, NULL, "RewriteCond URI (-U) check: "
3502 "path=%s -> status=%d", input, rsub->status));
3503 ap_destroy_sub_req(rsub);
3507 case CONDPAT_LU_FILE:
3508 if (*input && subreq_ok(r)) {
3509 rsub = ap_sub_req_lookup_file(input, r, NULL);
3510 if (rsub->status < 300 &&
3511 /* double-check that file exists since default result is 200 */
3512 apr_stat(&sb, rsub->filename, APR_FINFO_MIN,
3513 r->pool) == APR_SUCCESS) {
3516 rewritelog((r, 5, NULL, "RewriteCond file (-F) check: path=%s "
3517 "-> file=%s status=%d", input, rsub->filename,
3519 ap_destroy_sub_req(rsub);
3523 case CONDPAT_STR_GT:
3524 rc = (compare_lexicography(input, p->pattern+1) == 1) ? 1 : 0;
3527 case CONDPAT_STR_LT:
3528 rc = (compare_lexicography(input, p->pattern+1) == -1) ? 1 : 0;
3531 case CONDPAT_STR_EQ:
3532 if (p->flags & CONDFLAG_NOCASE) {
3533 rc = !strcasecmp(input, p->pattern);
3536 rc = !strcmp(input, p->pattern);
3541 /* it is really a regexp pattern, so apply it */
3542 rc = !ap_regexec(p->regexp, input, AP_MAX_REG_MATCH, regmatch, 0);
3544 /* update briRC backref info */
3545 if (rc && !(p->flags & CONDFLAG_NOTMATCH)) {
3546 ctx->briRC.source = input;
3547 ctx->briRC.nsub = p->regexp->re_nsub;
3548 memcpy(ctx->briRC.regmatch, regmatch, sizeof(regmatch));
3553 if (p->flags & CONDFLAG_NOTMATCH) {
3557 rewritelog((r, 4, ctx->perdir, "RewriteCond: input='%s' pattern='%s%s%s'%s "
3558 "=> %s", input, (p->flags & CONDFLAG_NOTMATCH) ? "!" : "",
3559 (p->ptype == CONDPAT_STR_EQ) ? "=" : "", p->pattern,
3560 (p->flags & CONDFLAG_NOCASE) ? " [NC]" : "",
3561 rc ? "matched" : "not-matched"));
3566 /* check for forced type and handler */
3567 static APR_INLINE void force_type_handler(rewriterule_entry *p,
3572 if (p->forced_mimetype) {
3573 expanded = do_expand(p->forced_mimetype, ctx);
3576 ap_str_tolower(expanded);
3578 rewritelog((ctx->r, 2, ctx->perdir, "remember %s to have MIME-type "
3579 "'%s'", ctx->r->filename, expanded));
3581 apr_table_setn(ctx->r->notes, REWRITE_FORCED_MIMETYPE_NOTEVAR,
3586 if (p->forced_handler) {
3587 expanded = do_expand(p->forced_handler, ctx);
3590 ap_str_tolower(expanded);
3592 rewritelog((ctx->r, 2, ctx->perdir, "remember %s to have "
3593 "Content-handler '%s'", ctx->r->filename, expanded));
3595 apr_table_setn(ctx->r->notes, REWRITE_FORCED_HANDLER_NOTEVAR,
3602 * Apply a single RewriteRule
3604 static int apply_rewrite_rule(rewriterule_entry *p, rewrite_ctx *ctx)
3606 regmatch_t regmatch[AP_MAX_REG_MATCH];
3607 apr_array_header_t *rewriteconds;
3608 rewritecond_entry *conds;
3610 char *newuri = NULL;
3611 request_rec *r = ctx->r;
3613 ctx->uri = r->filename;
3616 apr_size_t dirlen = strlen(ctx->perdir);
3618 /* Since we want to match against the (so called) full URL, we have
3619 * to re-add the PATH_INFO postfix
3621 if (r->path_info && *r->path_info) {
3622 rewritelog((r, 3, ctx->perdir, "add path info postfix: %s -> %s%s",
3623 ctx->uri, ctx->uri, r->path_info));
3624 ctx->uri = apr_pstrcat(r->pool, ctx->uri, r->path_info, NULL);
3627 /* Additionally we strip the physical path from the url to match
3628 * it independent from the underlaying filesystem.
3630 if (strlen(ctx->uri) >= dirlen &&
3631 !strncmp(ctx->uri, ctx->perdir, dirlen)) {
3633 rewritelog((r, 3, ctx->perdir, "strip per-dir prefix: %s -> %s",
3634 ctx->uri, ctx->uri + dirlen));
3635 ctx->uri = ctx->uri + dirlen;
3639 /* Try to match the URI against the RewriteRule pattern
3640 * and exit immediately if it didn't apply.
3642 rewritelog((r, 3, ctx->perdir, "applying pattern '%s' to uri '%s'",
3643 p->pattern, ctx->uri));
3645 rc = !ap_regexec(p->regexp, ctx->uri, AP_MAX_REG_MATCH, regmatch, 0);
3646 if (! (( rc && !(p->flags & RULEFLAG_NOTMATCH)) ||
3647 (!rc && (p->flags & RULEFLAG_NOTMATCH)) ) ) {
3651 /* It matched, wow! Now it's time to prepare the context structure for
3652 * further processing
3654 ctx->vary_this = NULL;
3655 ctx->briRC.source = NULL;
3657 if (p->flags & RULEFLAG_NOTMATCH) {
3658 ctx->briRR.source = NULL;
3661 ctx->briRR.source = apr_pstrdup(r->pool, ctx->uri);
3662 ctx->briRR.nsub = p->regexp->re_nsub;
3663 memcpy(ctx->briRR.regmatch, regmatch, sizeof(regmatch));
3666 /* Ok, we already know the pattern has matched, but we now
3667 * additionally have to check for all existing preconditions
3668 * (RewriteCond) which have to be also true. We do this at
3669 * this very late stage to avoid unnessesary checks which
3670 * would slow down the rewriting engine.
3672 rewriteconds = p->rewriteconds;
3673 conds = (rewritecond_entry *)rewriteconds->elts;
3675 for (i = 0; i < rewriteconds->nelts; ++i) {
3676 rewritecond_entry *c = &conds[i];
3678 rc = apply_rewrite_cond(c, ctx);
3679 if (c->flags & CONDFLAG_ORNEXT) {
3681 /* One condition is false, but another can be still true. */
3682 ctx->vary_this = NULL;
3686 /* skip the rest of the chained OR conditions */
3687 while ( i < rewriteconds->nelts
3688 && c->flags & CONDFLAG_ORNEXT) {
3698 /* If some HTTP header was involved in the condition, remember it
3701 if (ctx->vary_this) {
3702 ctx->vary = ctx->vary
3703 ? apr_pstrcat(r->pool, ctx->vary, ", ", ctx->vary_this,
3706 ctx->vary_this = NULL;
3710 /* expand the result */
3711 if (!(p->flags & RULEFLAG_NOSUB)) {
3712 newuri = do_expand(p->output, ctx);
3713 rewritelog((r, 2, ctx->perdir, "rewrite '%s' -> '%s'", ctx->uri,
3717 /* expand [E=var:val] and [CO=<cookie>] */
3718 do_expand_env(p->env, ctx);
3719 do_expand_cookie(p->cookie, ctx);
3721 /* non-substitution rules ('RewriteRule <pat> -') end here. */
3722 if (p->flags & RULEFLAG_NOSUB) {
3723 force_type_handler(p, ctx);
3725 if (p->flags & RULEFLAG_STATUS) {
3726 rewritelog((r, 2, ctx->perdir, "forcing responsecode %d for %s",
3727 p->forced_responsecode, r->filename));
3729 r->status = p->forced_responsecode;
3735 /* Now adjust API's knowledge about r->filename and r->args */
3736 r->filename = newuri;
3737 splitout_queryargs(r, p->flags & RULEFLAG_QSAPPEND);
3739 /* Add the previously stripped per-directory location prefix, unless
3740 * (1) it's an absolute URL path and
3741 * (2) it's a full qualified URL
3743 if (ctx->perdir && *r->filename != '/' && !is_absolute_uri(r->filename)) {
3744 rewritelog((r, 3, ctx->perdir, "add per-dir prefix: %s -> %s%s",
3745 r->filename, ctx->perdir, r->filename));
3747 r->filename = apr_pstrcat(r->pool, ctx->perdir, r->filename, NULL);
3750 /* If this rule is forced for proxy throughput
3751 * (`RewriteRule ... ... [P]') then emulate mod_proxy's
3752 * URL-to-filename handler to be sure mod_proxy is triggered
3753 * for this URL later in the Apache API. But make sure it is
3754 * a fully-qualified URL. (If not it is qualified with
3757 if (p->flags & RULEFLAG_PROXY) {
3758 fully_qualify_uri(r);
3760 rewritelog((r, 2, ctx->perdir, "forcing proxy-throughput with %s",
3763 r->filename = apr_pstrcat(r->pool, "proxy:", r->filename, NULL);
3767 /* If this rule is explicitly forced for HTTP redirection
3768 * (`RewriteRule .. .. [R]') then force an external HTTP
3769 * redirect. But make sure it is a fully-qualified URL. (If
3770 * not it is qualified with ourself).
3772 if (p->flags & RULEFLAG_FORCEREDIRECT) {
3773 fully_qualify_uri(r);
3775 rewritelog((r, 2, ctx->perdir, "explicitly forcing redirect with %s",
3778 r->status = p->forced_responsecode;
3782 /* Special Rewriting Feature: Self-Reduction
3783 * We reduce the URL by stripping a possible
3784 * http[s]://<ourhost>[:<port>] prefix, i.e. a prefix which
3785 * corresponds to ourself. This is to simplify rewrite maps
3786 * and to avoid recursion, etc. When this prefix is not a
3787 * coincidence then the user has to use [R] explicitly (see
3792 /* If this rule is still implicitly forced for HTTP
3793 * redirection (`RewriteRule .. <scheme>://...') then
3794 * directly force an external HTTP redirect.
3796 if (is_absolute_uri(r->filename)) {
3797 rewritelog((r, 2, ctx->perdir, "implicitly forcing redirect (rc=%d) "
3798 "with %s", p->forced_responsecode, r->filename));
3800 r->status = p->forced_responsecode;
3804 /* Finally remember the forced mime-type */
3805 force_type_handler(p, ctx);
3807 /* Puuhhhhhhhh... WHAT COMPLICATED STUFF ;_)
3808 * But now we're done for this particular rule.
3814 * Apply a complete rule set,
3815 * i.e. a list of rewrite rules
3817 static int apply_rewrite_list(request_rec *r, apr_array_header_t *rewriterules,
3820 rewriterule_entry *entries;
3821 rewriterule_entry *p;
3828 ctx = apr_palloc(r->pool, sizeof(*ctx));
3829 ctx->perdir = perdir;
3833 * Iterate over all existing rules
3835 entries = (rewriterule_entry *)rewriterules->elts;
3838 for (i = 0; i < rewriterules->nelts; i++) {
3842 * Ignore this rule on subrequests if we are explicitly
3843 * asked to do so or this is a proxy-throughput or a
3844 * forced redirect rule.
3846 if (r->main != NULL &&
3847 (p->flags & RULEFLAG_IGNOREONSUBREQ ||
3848 p->flags & RULEFLAG_FORCEREDIRECT )) {
3853 * Apply the current rule.
3856 rc = apply_rewrite_rule(p, ctx);
3859 /* Regardless of what we do next, we've found a match. Check to see
3860 * if any of the request header fields were involved, and add them
3861 * to the Vary field of the response.
3864 apr_table_merge(r->headers_out, "Vary", ctx->vary);
3868 * The rule sets the response code (implies match-only)
3870 if (p->flags & RULEFLAG_STATUS) {
3871 return ACTION_STATUS;
3875 * Indicate a change if this was not a match-only rule.
3878 changed = ((p->flags & RULEFLAG_NOESCAPE)
3879 ? ACTION_NOESCAPE : ACTION_NORMAL);
3883 * Pass-Through Feature (`RewriteRule .. .. [PT]'):
3884 * Because the Apache 1.x API is very limited we
3885 * need this hack to pass the rewritten URL to other
3886 * modules like mod_alias, mod_userdir, etc.
3888 if (p->flags & RULEFLAG_PASSTHROUGH) {
3889 rewritelog((r, 2, perdir, "forcing '%s' to get passed through "
3890 "to next API URI-to-filename handler", r->filename));
3891 r->filename = apr_pstrcat(r->pool, "passthrough:",
3893 changed = ACTION_NORMAL;
3898 * Stop processing also on proxy pass-through and
3899 * last-rule and new-round flags.
3901 if (p->flags & (RULEFLAG_PROXY | RULEFLAG_LASTRULE)) {
3906 * On "new-round" flag we just start from the top of
3907 * the rewriting ruleset again.
3909 if (p->flags & RULEFLAG_NEWROUND) {
3914 * If we are forced to skip N next rules, do it now.
3918 while ( i < rewriterules->nelts
3928 * If current rule is chained with next rule(s),
3929 * skip all this next rule(s)
3931 while ( i < rewriterules->nelts
3932 && p->flags & RULEFLAG_CHAIN) {
3943 * +-------------------------------------------------------+
3945 * | Module Initialization Hooks
3947 * +-------------------------------------------------------+
3950 static int pre_config(apr_pool_t *pconf,
3954 APR_OPTIONAL_FN_TYPE(ap_register_rewrite_mapfunc) *map_pfn_register;
3956 /* register int: rewritemap handlers */
3957 mapfunc_hash = apr_hash_make(pconf);
3958 map_pfn_register = APR_RETRIEVE_OPTIONAL_FN(ap_register_rewrite_mapfunc);
3959 if (map_pfn_register) {
3960 map_pfn_register("tolower", rewrite_mapfunc_tolower);
3961 map_pfn_register("toupper", rewrite_mapfunc_toupper);
3962 map_pfn_register("escape", rewrite_mapfunc_escape);
3963 map_pfn_register("unescape", rewrite_mapfunc_unescape);
3968 static int post_config(apr_pool_t *p,
3976 const char *userdata_key = "rewrite_init_module";
3978 apr_pool_userdata_get(&data, userdata_key, s->process->pool);
3981 apr_pool_userdata_set((const void *)1, userdata_key,
3982 apr_pool_cleanup_null, s->process->pool);
3985 /* check if proxy module is available */
3986 proxy_available = (ap_find_linked_module("mod_proxy.c") != NULL);
3988 #ifndef REWRITELOG_DISABLED
3989 /* create the rewriting lockfiles in the parent */
3990 if ((rv = apr_global_mutex_create(&rewrite_log_lock, NULL,
3991 APR_LOCK_DEFAULT, p)) != APR_SUCCESS) {
3992 ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s,
3993 "mod_rewrite: could not create rewrite_log_lock");
3994 return HTTP_INTERNAL_SERVER_ERROR;
3997 #ifdef MOD_REWRITE_SET_MUTEX_PERMS
3998 rv = unixd_set_global_mutex_perms(rewrite_log_lock);
3999 if (rv != APR_SUCCESS) {
4000 ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s,
4001 "mod_rewrite: Could not set permissions on "
4002 "rewrite_log_lock; check User and Group directives");
4003 return HTTP_INTERNAL_SERVER_ERROR;
4006 #endif /* rewritelog */
4008 rv = rewritelock_create(s, p);
4009 if (rv != APR_SUCCESS) {
4010 return HTTP_INTERNAL_SERVER_ERROR;
4013 apr_pool_cleanup_register(p, (void *)s, rewritelock_remove,
4014 apr_pool_cleanup_null);
4016 /* step through the servers and
4017 * - open each rewriting logfile
4018 * - open the RewriteMap prg:xxx programs
4020 for (; s; s = s->next) {
4021 #ifndef REWRITELOG_DISABLED
4022 if (!open_rewritelog(s, p)) {
4023 return HTTP_INTERNAL_SERVER_ERROR;
4028 if (run_rewritemap_programs(s, p) != APR_SUCCESS) {
4029 return HTTP_INTERNAL_SERVER_ERROR;
4037 static void init_child(apr_pool_t *p, server_rec *s)
4039 apr_status_t rv = 0; /* get a rid of gcc warning (REWRITELOG_DISABLED) */
4041 if (lockname != NULL && *(lockname) != '\0') {
4042 rv = apr_global_mutex_child_init(&rewrite_mapr_lock_acquire,
4044 if (rv != APR_SUCCESS) {
4045 ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s,
4046 "mod_rewrite: could not init rewrite_mapr_lock_acquire"
4051 #ifndef REWRITELOG_DISABLED
4052 rv = apr_global_mutex_child_init(&rewrite_log_lock, NULL, p);
4053 if (rv != APR_SUCCESS) {
4054 ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s,
4055 "mod_rewrite: could not init rewrite log lock in child");
4059 /* create the lookup cache */
4060 if (!init_cache(p)) {
4061 ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s,
4062 "mod_rewrite: could not init map cache in child");
4068 * +-------------------------------------------------------+
4072 * +-------------------------------------------------------+
4076 * URI-to-filename hook
4077 * [deals with RewriteRules in server context]
4079 static int hook_uri2file(request_rec *r)
4081 rewrite_server_conf *conf;
4082 const char *saved_rulestatus;
4084 const char *thisserver;
4086 const char *thisurl;
4091 * retrieve the config structures
4093 conf = ap_get_module_config(r->server->module_config, &rewrite_module);
4096 * only do something under runtime if the engine is really enabled,
4097 * else return immediately!
4099 if (conf->state == ENGINE_DISABLED) {
4104 * check for the ugly API case of a virtual host section where no
4105 * mod_rewrite directives exists. In this situation we became no chance
4106 * by the API to setup our default per-server config so we have to
4107 * on-the-fly assume we have the default config. But because the default
4108 * config has a disabled rewriting engine we are lucky because can
4109 * just stop operating now.
4111 if (conf->server != r->server) {
4116 * add the SCRIPT_URL variable to the env. this is a bit complicated
4117 * due to the fact that apache uses subrequests and internal redirects
4120 if (r->main == NULL) {
4121 var = apr_table_get(r->subprocess_env, REDIRECT_ENVVAR_SCRIPT_URL);
4123 apr_table_setn(r->subprocess_env, ENVVAR_SCRIPT_URL, r->uri);
4126 apr_table_setn(r->subprocess_env, ENVVAR_SCRIPT_URL, var);
4130 var = apr_table_get(r->main->subprocess_env, ENVVAR_SCRIPT_URL);
4131 apr_table_setn(r->subprocess_env, ENVVAR_SCRIPT_URL, var);
4135 * create the SCRIPT_URI variable for the env
4138 /* add the canonical URI of this URL */
4139 thisserver = ap_get_server_name(r);
4140 port = ap_get_server_port(r);
4141 if (ap_is_default_port(port, r)) {
4145 thisport = apr_psprintf(r->pool, ":%u", port);
4147 thisurl = apr_table_get(r->subprocess_env, ENVVAR_SCRIPT_URL);
4149 /* set the variable */
4150 var = apr_pstrcat(r->pool, ap_http_method(r), "://", thisserver, thisport,
4152 apr_table_setn(r->subprocess_env, ENVVAR_SCRIPT_URI, var);
4154 if (!(saved_rulestatus = apr_table_get(r->notes,"mod_rewrite_rewritten"))) {
4155 /* if filename was not initially set,
4156 * we start with the requested URI
4158 if (r->filename == NULL) {
4159 r->filename = apr_pstrdup(r->pool, r->uri);
4160 rewritelog((r, 2, NULL, "init rewrite engine with requested uri %s",
4164 rewritelog((r, 2, NULL, "init rewrite engine with passed filename "
4165 "%s. Original uri = %s", r->filename, r->uri));
4169 * now apply the rules ...
4171 rulestatus = apply_rewrite_list(r, conf->rewriterules, NULL);
4172 apr_table_set(r->notes,"mod_rewrite_rewritten",
4173 apr_psprintf(r->pool,"%d",rulestatus));
4176 rewritelog((r, 2, NULL, "uri already rewritten. Status %s, Uri %s, "
4177 "r->filename %s", saved_rulestatus, r->uri, r->filename));
4179 rulestatus = atoi(saved_rulestatus);
4186 if (ACTION_STATUS == rulestatus) {
4189 r->status = HTTP_OK;
4193 flen = strlen(r->filename);
4194 if (flen > 6 && strncmp(r->filename, "proxy:", 6) == 0) {
4195 /* it should be go on as an internal proxy request */
4197 /* check if the proxy module is enabled, so
4198 * we can actually use it!
4200 if (!proxy_available) {
4201 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
4202 "attempt to make remote request from mod_rewrite "
4203 "without proxy enabled: %s", r->filename);
4204 return HTTP_FORBIDDEN;
4207 /* make sure the QUERY_STRING and
4208 * PATH_INFO parts get incorporated
4210 if (r->path_info != NULL) {
4211 r->filename = apr_pstrcat(r->pool, r->filename,
4212 r->path_info, NULL);
4214 if (r->args != NULL &&
4215 r->uri == r->unparsed_uri) {
4216 /* see proxy_http:proxy_http_canon() */
4217 r->filename = apr_pstrcat(r->pool, r->filename,
4218 "?", r->args, NULL);
4221 /* now make sure the request gets handled by the proxy handler */
4222 r->proxyreq = PROXYREQ_REVERSE;
4223 r->handler = "proxy-server";
4225 rewritelog((r, 1, NULL, "go-ahead with proxy request %s [OK]",
4229 else if ((skip = is_absolute_uri(r->filename)) > 0) {
4232 /* it was finally rewritten to a remote URL */
4234 if (rulestatus != ACTION_NOESCAPE) {
4235 rewritelog((r, 1, NULL, "escaping %s for redirect",
4237 r->filename = escape_absolute_uri(r->pool, r->filename, skip);
4240 /* append the QUERY_STRING part */
4242 r->filename = apr_pstrcat(r->pool, r->filename, "?",
4243 (rulestatus == ACTION_NOESCAPE)
4245 : ap_escape_uri(r->pool, r->args),
4249 /* determine HTTP redirect response code */
4250 if (ap_is_HTTP_REDIRECT(r->status)) {
4252 r->status = HTTP_OK; /* make Apache kernel happy */
4255 n = HTTP_MOVED_TEMPORARILY;
4258 /* now do the redirection */
4259 apr_table_setn(r->headers_out, "Location", r->filename);
4260 rewritelog((r, 1, NULL, "redirect to %s [REDIRECT/%d]", r->filename,
4265 else if (flen > 12 && strncmp(r->filename, "passthrough:", 12) == 0) {
4267 * Hack because of underpowered API: passing the current
4268 * rewritten filename through to other URL-to-filename handlers
4269 * just as it were the requested URL. This is to enable
4270 * post-processing by mod_alias, etc. which always act on
4271 * r->uri! The difference here is: We do not try to
4272 * add the document root
4274 r->uri = apr_pstrdup(r->pool, r->filename+12);
4278 /* it was finally rewritten to a local path */
4280 /* expand "/~user" prefix */
4282 r->filename = expand_tildepaths(r, r->filename);
4284 rewritelog((r, 2, NULL, "local path result: %s", r->filename));
4286 /* the filename must be either an absolute local path or an
4287 * absolute local URL.
4289 if ( *r->filename != '/'
4290 && !ap_os_is_path_absolute(r->pool, r->filename)) {
4291 return HTTP_BAD_REQUEST;
4294 /* if there is no valid prefix, we call
4295 * the translator from the core and
4296 * prefix the filename with document_root
4299 * We cannot leave out the prefix_stat because
4300 * - when we always prefix with document_root
4301 * then no absolute path can be created, e.g. via
4302 * emulating a ScriptAlias directive, etc.
4303 * - when we always NOT prefix with document_root
4304 * then the files under document_root have to
4305 * be references directly and document_root
4306 * gets never used and will be a dummy parameter -
4310 * Under real Unix systems this is no problem,
4311 * because we only do stat() on the first directory
4312 * and this gets cached by the kernel for along time!
4314 if (!prefix_stat(r->filename, r->pool)) {
4318 r->uri = r->filename;
4319 res = ap_core_translate(r);
4323 rewritelog((r, 1, NULL, "prefixing with document_root of %s"
4324 " FAILED", r->filename));
4329 rewritelog((r, 2, NULL, "prefixed with document_root to %s",
4333 rewritelog((r, 1, NULL, "go-ahead with %s [OK]", r->filename));
4338 rewritelog((r, 1, NULL, "pass through %s", r->filename));
4345 * [RewriteRules in directory context]
4347 static int hook_fixup(request_rec *r)
4349 rewrite_perdir_conf *dconf;
4358 dconf = (rewrite_perdir_conf *)ap_get_module_config(r->per_dir_config,
4361 /* if there is no per-dir config we return immediately */
4362 if (dconf == NULL) {
4366 /* if there are no real (i.e. no RewriteRule directives!)
4367 per-dir config of us, we return also immediately */
4368 if (dconf->directory == NULL) {
4373 * .htaccess file is called before really entering the directory, i.e.:
4374 * URL: http://localhost/foo and .htaccess is located in foo directory
4375 * Ignore such attempts, since they may lead to undefined behaviour.
4377 l = strlen(dconf->directory) - 1;
4378 if (r->filename && strlen(r->filename) == l &&
4379 (dconf->directory)[l] == '/' &&
4380 !strncmp(r->filename, dconf->directory, l)) {
4385 * only do something under runtime if the engine is really enabled,
4386 * for this directory, else return immediately!
4388 if (dconf->state == ENGINE_DISABLED) {
4393 * Do the Options check after engine check, so
4394 * the user is able to explicitely turn RewriteEngine Off.
4396 if (!(ap_allow_options(r) & (OPT_SYM_LINKS | OPT_SYM_OWNER))) {
4397 /* FollowSymLinks is mandatory! */
4398 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
4399 "Options FollowSymLinks or SymLinksIfOwnerMatch is off "
4400 "which implies that RewriteRule directive is forbidden: "
4402 return HTTP_FORBIDDEN;
4406 * remember the current filename before rewriting for later check
4407 * to prevent deadlooping because of internal redirects
4408 * on final URL/filename which can be equal to the inital one.
4410 ofilename = r->filename;
4413 * now apply the rules ...
4415 rulestatus = apply_rewrite_list(r, dconf->rewriterules, dconf->directory);
4419 if (ACTION_STATUS == rulestatus) {
4422 r->status = HTTP_OK;
4426 l = strlen(r->filename);
4427 if (l > 6 && strncmp(r->filename, "proxy:", 6) == 0) {
4428 /* it should go on as an internal proxy request */
4430 /* make sure the QUERY_STRING and
4431 * PATH_INFO parts get incorporated
4432 * (r->path_info was already appended by the
4433 * rewriting engine because of the per-dir context!)
4435 if (r->args != NULL) {
4436 r->filename = apr_pstrcat(r->pool, r->filename,
4437 "?", r->args, NULL);
4440 /* now make sure the request gets handled by the proxy handler */
4441 r->proxyreq = PROXYREQ_REVERSE;
4442 r->handler = "proxy-server";
4444 rewritelog((r, 1, dconf->directory, "go-ahead with proxy request "
4445 "%s [OK]", r->filename));
4448 else if ((skip = is_absolute_uri(r->filename)) > 0) {
4449 /* it was finally rewritten to a remote URL */
4451 /* because we are in a per-dir context
4452 * first try to replace the directory with its base-URL
4453 * if there is a base-URL available
4455 if (dconf->baseurl != NULL) {
4456 /* skip 'scheme://' */
4457 cp = r->filename + skip;
4459 if ((cp = ap_strchr(cp, '/')) != NULL && *(++cp)) {
4460 rewritelog((r, 2, dconf->directory,
4461 "trying to replace prefix %s with %s",
4462 dconf->directory, dconf->baseurl));
4464 /* I think, that hack needs an explanation:
4466 * mod_rewrite was written for unix systems, were
4467 * absolute file-system paths start with a slash.
4468 * URL-paths _also_ start with slashes, so they
4469 * can be easily compared with system paths.
4471 * the following assumes, that the actual url-path
4472 * may be prefixed by the current directory path and
4473 * tries to replace the system path with the RewriteBase
4475 * That assumption is true if we use a RewriteRule like
4477 * RewriteRule ^foo bar [R]
4479 * (see apply_rewrite_rule function)
4480 * However on systems that don't have a / as system
4481 * root this will never match, so we skip the / after the
4482 * hostname and compare/substitute only the stuff after it.
4484 * (note that cp was already increased to the right value)
4486 cp2 = subst_prefix_path(r, cp, (*dconf->directory == '/')
4487 ? dconf->directory + 1
4489 dconf->baseurl + 1);
4490 if (strcmp(cp2, cp) != 0) {
4492 r->filename = apr_pstrcat(r->pool, r->filename,
4498 /* now prepare the redirect... */
4499 if (rulestatus != ACTION_NOESCAPE) {
4500 rewritelog((r, 1, dconf->directory, "escaping %s for redirect",
4502 r->filename = escape_absolute_uri(r->pool, r->filename, skip);
4505 /* append the QUERY_STRING part */
4507 r->filename = apr_pstrcat(r->pool, r->filename, "?",
4508 (rulestatus == ACTION_NOESCAPE)
4510 : ap_escape_uri(r->pool, r->args),
4514 /* determine HTTP redirect response code */
4515 if (ap_is_HTTP_REDIRECT(r->status)) {
4517 r->status = HTTP_OK; /* make Apache kernel happy */
4520 n = HTTP_MOVED_TEMPORARILY;
4523 /* now do the redirection */
4524 apr_table_setn(r->headers_out, "Location", r->filename);
4525 rewritelog((r, 1, dconf->directory, "redirect to %s [REDIRECT/%d]",
4530 /* it was finally rewritten to a local path */
4532 /* if someone used the PASSTHROUGH flag in per-dir
4533 * context we just ignore it. It is only useful
4534 * in per-server context
4536 if (l > 12 && strncmp(r->filename, "passthrough:", 12) == 0) {
4537 r->filename = apr_pstrdup(r->pool, r->filename+12);
4540 /* the filename must be either an absolute local path or an
4541 * absolute local URL.
4543 if ( *r->filename != '/'
4544 && !ap_os_is_path_absolute(r->pool, r->filename)) {
4545 return HTTP_BAD_REQUEST;
4548 /* Check for deadlooping:
4549 * At this point we KNOW that at least one rewriting
4550 * rule was applied, but when the resulting URL is
4551 * the same as the initial URL, we are not allowed to
4552 * use the following internal redirection stuff because
4553 * this would lead to a deadloop.
4555 if (strcmp(r->filename, ofilename) == 0) {
4556 rewritelog((r, 1, dconf->directory, "initial URL equal rewritten"
4557 " URL: %s [IGNORING REWRITE]", r->filename));
4561 /* if there is a valid base-URL then substitute
4562 * the per-dir prefix with this base-URL if the
4563 * current filename still is inside this per-dir
4564 * context. If not then treat the result as a
4567 if (dconf->baseurl != NULL) {
4568 rewritelog((r, 2, dconf->directory, "trying to replace prefix "
4569 "%s with %s", dconf->directory, dconf->baseurl));
4571 r->filename = subst_prefix_path(r, r->filename,
4576 /* if no explicit base-URL exists we assume
4577 * that the directory prefix is also a valid URL
4578 * for this webserver and only try to remove the
4579 * document_root if it is prefix
4581 if ((ccp = ap_document_root(r)) != NULL) {
4582 /* strip trailing slash */
4584 if (ccp[l-1] == '/') {
4587 if (!strncmp(r->filename, ccp, l) &&
4588 r->filename[l] == '/') {
4589 rewritelog((r, 2,dconf->directory, "strip document_root"
4590 " prefix: %s -> %s", r->filename,
4593 r->filename = apr_pstrdup(r->pool, r->filename+l);
4598 /* now initiate the internal redirect */
4599 rewritelog((r, 1, dconf->directory, "internal redirect with %s "
4600 "[INTERNAL REDIRECT]", r->filename));
4601 r->filename = apr_pstrcat(r->pool, "redirect:", r->filename, NULL);
4602 r->handler = "redirect-handler";
4607 rewritelog((r, 1, dconf->directory, "pass through %s", r->filename));
4614 * [T=...,H=...] execution
4616 static int hook_mimetype(request_rec *r)
4621 t = apr_table_get(r->notes, REWRITE_FORCED_MIMETYPE_NOTEVAR);
4623 rewritelog((r, 1, NULL, "force filename %s to have MIME-type '%s'",
4626 ap_set_content_type(r, t);
4630 t = apr_table_get(r->notes, REWRITE_FORCED_HANDLER_NOTEVAR);
4632 rewritelog((r, 1, NULL, "force filename %s to have the "
4633 "Content-handler '%s'", r->filename, t));
4641 /* check whether redirect limit is reached */
4642 static int is_redirect_limit_exceeded(request_rec *r)
4644 request_rec *top = r;
4645 rewrite_request_conf *reqc;
4646 rewrite_perdir_conf *dconf;
4648 /* we store it in the top request */
4656 /* fetch our config */
4657 reqc = (rewrite_request_conf *) ap_get_module_config(top->request_config,
4660 /* no config there? create one. */
4662 rewrite_server_conf *sconf;
4664 reqc = apr_palloc(top->pool, sizeof(rewrite_request_conf));
4665 sconf = ap_get_module_config(r->server->module_config, &rewrite_module);
4667 reqc->redirects = 0;
4668 reqc->redirect_limit = sconf->redirect_limit
4669 ? sconf->redirect_limit
4670 : REWRITE_REDIRECT_LIMIT;
4672 /* associate it with this request */
4673 ap_set_module_config(top->request_config, &rewrite_module, reqc);
4676 /* allow to change the limit during redirects. */
4677 dconf = (rewrite_perdir_conf *)ap_get_module_config(r->per_dir_config,
4680 /* 0 == unset; take server conf ... */
4681 if (dconf->redirect_limit) {
4682 reqc->redirect_limit = dconf->redirect_limit;
4685 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
4686 "mod_rewrite's internal redirect status: %d/%d.",
4687 reqc->redirects, reqc->redirect_limit);
4689 /* and now give the caller a hint */
4690 return (reqc->redirects++ >= reqc->redirect_limit);
4694 * "content" handler for internal redirects
4696 static int handler_redirect(request_rec *r)
4698 if (strcmp(r->handler, "redirect-handler")) {
4702 /* just make sure that we are really meant! */
4703 if (strncmp(r->filename, "redirect:", 9) != 0) {
4707 if (is_redirect_limit_exceeded(r)) {
4708 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
4709 "mod_rewrite: maximum number of internal redirects "
4710 "reached. Assuming configuration error. Use "
4711 "'RewriteOptions MaxRedirects' to increase the limit "
4713 return HTTP_INTERNAL_SERVER_ERROR;
4716 /* now do the internal redirect */
4717 ap_internal_redirect(apr_pstrcat(r->pool, r->filename+9,
4718 r->args ? "?" : NULL, r->args, NULL), r);
4720 /* and return gracefully */
4726 * +-------------------------------------------------------+
4728 * | Module paraphernalia
4730 * +-------------------------------------------------------+
4733 #ifdef REWRITELOG_DISABLED
4734 static const char *fake_rewritelog(cmd_parms *cmd, void *dummy, const char *a1)
4736 return "RewriteLog and RewriteLogLevel are not supported by this build "
4737 "of mod_rewrite because it was compiled using the "
4738 "-DREWRITELOG_DISABLED compiler option. You have to recompile "
4739 "mod_rewrite WITHOUT this option in order to use the rewrite log.";
4743 static const command_rec command_table[] = {
4744 AP_INIT_FLAG( "RewriteEngine", cmd_rewriteengine, NULL, OR_FILEINFO,
4745 "On or Off to enable or disable (default) the whole "
4746 "rewriting engine"),
4747 AP_INIT_ITERATE( "RewriteOptions", cmd_rewriteoptions, NULL, OR_FILEINFO,
4748 "List of option strings to set"),
4749 AP_INIT_TAKE1( "RewriteBase", cmd_rewritebase, NULL, OR_FILEINFO,
4750 "the base URL of the per-directory context"),
4751 AP_INIT_RAW_ARGS("RewriteCond", cmd_rewritecond, NULL, OR_FILEINFO,
4752 "an input string and a to be applied regexp-pattern"),
4753 AP_INIT_RAW_ARGS("RewriteRule", cmd_rewriterule, NULL, OR_FILEINFO,
4754 "an URL-applied regexp-pattern and a substitution URL"),
4755 AP_INIT_TAKE2( "RewriteMap", cmd_rewritemap, NULL, RSRC_CONF,
4756 "a mapname and a filename"),
4757 AP_INIT_TAKE1( "RewriteLock", cmd_rewritelock, NULL, RSRC_CONF,
4758 "the filename of a lockfile used for inter-process "
4760 #ifndef REWRITELOG_DISABLED
4761 AP_INIT_TAKE1( "RewriteLog", cmd_rewritelog, NULL, RSRC_CONF,
4762 "the filename of the rewriting logfile"),
4763 AP_INIT_TAKE1( "RewriteLogLevel", cmd_rewriteloglevel, NULL, RSRC_CONF,
4764 "the level of the rewriting logfile verbosity "
4765 "(0=none, 1=std, .., 9=max)"),
4767 AP_INIT_TAKE1( "RewriteLog", fake_rewritelog, NULL, RSRC_CONF,
4768 "[DISABLED] the filename of the rewriting logfile"),
4769 AP_INIT_TAKE1( "RewriteLogLevel", fake_rewritelog, NULL, RSRC_CONF,
4770 "[DISABLED] the level of the rewriting logfile verbosity"),
4775 static void ap_register_rewrite_mapfunc(char *name, rewrite_mapfunc_t *func)
4777 apr_hash_set(mapfunc_hash, name, strlen(name), (const void *)func);
4780 static void register_hooks(apr_pool_t *p)
4782 /* fixup after mod_proxy, so that the proxied url will not
4783 * escaped accidentally by mod_proxy's fixup.
4785 static const char * const aszPre[]={ "mod_proxy.c", NULL };
4787 APR_REGISTER_OPTIONAL_FN(ap_register_rewrite_mapfunc);
4789 ap_hook_handler(handler_redirect, NULL, NULL, APR_HOOK_MIDDLE);
4790 ap_hook_pre_config(pre_config, NULL, NULL, APR_HOOK_MIDDLE);
4791 ap_hook_post_config(post_config, NULL, NULL, APR_HOOK_MIDDLE);
4792 ap_hook_child_init(init_child, NULL, NULL, APR_HOOK_MIDDLE);
4794 ap_hook_fixups(hook_fixup, aszPre, NULL, APR_HOOK_FIRST);
4795 ap_hook_fixups(hook_mimetype, NULL, NULL, APR_HOOK_LAST);
4796 ap_hook_translate_name(hook_uri2file, NULL, NULL, APR_HOOK_FIRST);
4799 /* the main config structure */
4800 module AP_MODULE_DECLARE_DATA rewrite_module = {
4801 STANDARD20_MODULE_STUFF,
4802 config_perdir_create, /* create per-dir config structures */
4803 config_perdir_merge, /* merge per-dir config structures */
4804 config_server_create, /* create per-server config structures */
4805 config_server_merge, /* merge per-server config structures */
4806 command_table, /* table of config file commands */
4807 register_hooks /* register hooks */