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-
- /* ====================================================================
- * Copyright (c) 1995 The Apache Group. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission.
- *
- * 5. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
-
- /*
- * http_alias.c: Stuff for dealing with directory aliases
- *
- * Original by Rob McCool, rewritten in succession by David Robinson
- * and rst.
- *
- */
-
- #include "httpd.h"
- #include "http_config.h"
-
- typedef struct {
- char *real;
- char *fake;
- char *handler;
- } alias_entry;
-
- typedef struct {
- array_header *aliases;
- array_header *redirects;
- } alias_server_conf;
-
- typedef struct {
- array_header *redirects;
- } alias_dir_conf;
- module alias_module;
-
- void *create_alias_config (pool *p, server_rec *s)
- {
- alias_server_conf *a =
- (alias_server_conf *)pcalloc (p, sizeof(alias_server_conf));
-
- a->aliases = make_array (p, 20, sizeof(alias_entry));
- a->redirects = make_array (p, 20, sizeof(alias_entry));
- return a;
- }
-
- void *create_alias_dir_config (pool *p, char *d)
- {
- alias_dir_conf *a =
- (alias_dir_conf *)pcalloc (p, sizeof(alias_dir_conf));
- a->redirects = make_array (p, 2, sizeof(alias_entry));
- return a;
- }
- void *merge_alias_config (pool *p, void *basev, void *overridesv)
- {
- alias_server_conf *a =
- (alias_server_conf *)pcalloc (p, sizeof(alias_server_conf));
- alias_server_conf *base = (alias_server_conf *)basev,
- *overrides = (alias_server_conf *)overridesv;
-
- a->aliases = append_arrays (p, overrides->aliases, base->aliases);
- a->redirects = append_arrays (p, overrides->redirects, base->redirects);
- return a;
- }
-
- void *merge_alias_dir_config (pool *p, void *basev, void *overridesv)
- {
- alias_dir_conf *a =
- (alias_dir_conf *)pcalloc (p, sizeof(alias_dir_conf));
- alias_dir_conf *base = (alias_dir_conf *)basev,
- *overrides = (alias_dir_conf *)overridesv;
- a->redirects = append_arrays (p, overrides->redirects, base->redirects);
- return a;
- }
- char *add_alias(cmd_parms *cmd, void *dummy, char *f, char *r)
- {
- server_rec *s = cmd->server;
- alias_server_conf *conf =
- (alias_server_conf *)get_module_config(s->module_config,&alias_module);
- alias_entry *new = push_array (conf->aliases);
-
- /* XX r can NOT be relative to DocumentRoot here... compat bug. */
-
- new->fake = f; new->real = r; new->handler = cmd->info;
- return NULL;
- }
-
- char *add_redirect(cmd_parms *cmd, alias_dir_conf *dirconf, char *f, char *url)
- {
- alias_entry *new;
- server_rec *s = cmd->server;
- alias_server_conf *serverconf =
- (alias_server_conf *)get_module_config(s->module_config,&alias_module);
-
- if (!is_url (url)) return "Redirect to non-URL";
- if ( cmd->path )
- {
- new = push_array (dirconf->redirects);
- }
- else
- {
- new = push_array (serverconf->redirects);
- }
- new->fake = f; new->real = url;
- return NULL;
- }
-
- command_rec alias_cmds[] = {
- { "Alias", add_alias, NULL, RSRC_CONF, TAKE2,
- "a fakename and a realname"},
- { "ScriptAlias", add_alias, "cgi-script", RSRC_CONF, TAKE2,
- "a fakename and a realname"},
- { "Redirect", add_redirect, NULL, OR_FILEINFO, TAKE2,
- "a document to be redirected, then the destination URL" },
- { NULL }
- };
-
- int alias_matches (char *uri, char *alias_fakename)
- {
- char *end_fakename = alias_fakename + strlen (alias_fakename);
- char *aliasp = alias_fakename, *urip = uri;
-
- while (aliasp < end_fakename) {
- if (*aliasp == '/') {
- /* any number of '/' in the alias matches any number in
- * the supplied URI, but there must be at least one...
- */
- if (*urip != '/') return 0;
-
- while (*aliasp == '/') ++ aliasp;
- while (*urip == '/') ++ urip;
- }
- else {
- /* Other characters are compared literally */
- if (*urip++ != *aliasp++) return 0;
- }
- }
-
- /* Check last alias path component matched all the way */
-
- if (aliasp[-1] != '/' && *urip != '\0' && *urip != '/')
- return 0;
-
- /* Return number of characters from URI which matched (may be
- * greater than length of alias, since we may have matched
- * doubled slashes)
- */
-
- return urip - uri;
- }
-
- char *try_alias_list (request_rec *r, array_header *aliases, int doesc)
- {
- alias_entry *entries = (alias_entry *)aliases->elts;
- int i;
-
- for (i = 0; i < aliases->nelts; ++i) {
- alias_entry *p = &entries[i];
- int l = alias_matches (r->uri, p->fake);
-
- if (l > 0) {
- if (p->handler) { /* Set handler, and leave a note for mod_cgi */
- r->handler = pstrdup(r->pool, p->handler);
- table_set (r->notes, "alias-forced-type", p->handler);
- }
-
- if (doesc) {
- char *escurl;
- escurl = os_escape_path(r->pool, r->uri + l, 1);
- return pstrcat(r->pool, p->real, escurl, NULL);
- } else
- return pstrcat(r->pool, p->real, r->uri + l, NULL);
- }
- }
-
- return NULL;
- }
-
- int translate_alias_redir(request_rec *r)
- {
- void *sconf = r->server->module_config;
- alias_server_conf *serverconf =
- (alias_server_conf *)get_module_config(sconf, &alias_module);
- char *ret;
-
- #ifdef __EMX__
- /* Add support for OS/2 drive names */
- if ((r->uri[0] != '/' && r->uri[0] != '\0') && r->uri[1] != ':')
- #else
- if (r->uri[0] != '/' && r->uri[0] != '\0')
- #endif
- return BAD_REQUEST;
-
- if ((ret = try_alias_list (r, serverconf->redirects, 1)) != NULL) {
- table_set (r->headers_out, "Location", ret);
- return REDIRECT;
- }
-
- if ((ret = try_alias_list (r, serverconf->aliases, 0)) != NULL) {
- r->filename = ret;
- return OK;
- }
-
- return DECLINED;
- }
-
- int fixup_redir(request_rec *r)
- {
- void *dconf = r->per_dir_config;
- alias_dir_conf *dirconf =
- (alias_dir_conf *)get_module_config(dconf, &alias_module);
- char *ret;
-
- /* It may have changed since last time, so try again */
-
- if ((ret = try_alias_list (r, dirconf->redirects, 1)) != NULL) {
- table_set (r->headers_out, "Location", ret);
- return REDIRECT;
- }
-
- return DECLINED;
- }
-
- module alias_module = {
- STANDARD_MODULE_STUFF,
- NULL, /* initializer */
- create_alias_dir_config, /* dir config creater */
- merge_alias_dir_config, /* dir merger --- default is to override */
- create_alias_config, /* server config */
- merge_alias_config, /* merge server configs */
- alias_cmds, /* command table */
- NULL, /* handlers */
- translate_alias_redir, /* filename translation */
- NULL, /* check_user_id */
- NULL, /* check auth */
- NULL, /* check access */
- NULL, /* type_checker */
- fixup_redir, /* fixups */
- NULL /* logger */
- };
-