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e3e87d34a0
Obtained from: Apache 1.3.9 (minus unused files), tag APACHE_1_3_9 Submitted by: Apache Group git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@83751 13f79535-47bb-0310-9956-ffa450edef68
419 lines
12 KiB
C
419 lines
12 KiB
C
/* ====================================================================
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* Copyright (c) 1995-1999 The Apache Group. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the Apache Group
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* for use in the Apache HTTP server project (http://www.apache.org/)."
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*
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* 4. The names "Apache Server" and "Apache Group" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache"
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* nor may "Apache" appear in their names without prior written
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* permission of the Apache Group.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the Apache Group
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* for use in the Apache HTTP server project (http://www.apache.org/)."
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*
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* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Group and was originally based
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* on public domain software written at the National Center for
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* Supercomputing Applications, University of Illinois, Urbana-Champaign.
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* For more information on the Apache Group and the Apache HTTP server
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* project, please see <http://www.apache.org/>.
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*
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*/
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/*
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* http_alias.c: Stuff for dealing with directory aliases
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*
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* Original by Rob McCool, rewritten in succession by David Robinson
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* and rst.
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*
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*/
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#include "httpd.h"
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#include "http_config.h"
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typedef struct {
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char *real;
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char *fake;
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char *handler;
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regex_t *regexp;
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int redir_status; /* 301, 302, 303, 410, etc */
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} alias_entry;
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typedef struct {
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array_header *aliases;
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array_header *redirects;
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} alias_server_conf;
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typedef struct {
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array_header *redirects;
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} alias_dir_conf;
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module MODULE_VAR_EXPORT alias_module;
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static void *create_alias_config(pool *p, server_rec *s)
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{
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alias_server_conf *a =
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(alias_server_conf *) ap_pcalloc(p, sizeof(alias_server_conf));
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a->aliases = ap_make_array(p, 20, sizeof(alias_entry));
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a->redirects = ap_make_array(p, 20, sizeof(alias_entry));
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return a;
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}
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static void *create_alias_dir_config(pool *p, char *d)
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{
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alias_dir_conf *a =
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(alias_dir_conf *) ap_pcalloc(p, sizeof(alias_dir_conf));
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a->redirects = ap_make_array(p, 2, sizeof(alias_entry));
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return a;
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}
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static void *merge_alias_config(pool *p, void *basev, void *overridesv)
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{
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alias_server_conf *a =
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(alias_server_conf *) ap_pcalloc(p, sizeof(alias_server_conf));
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alias_server_conf *base = (alias_server_conf *) basev, *overrides = (alias_server_conf *) overridesv;
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a->aliases = ap_append_arrays(p, overrides->aliases, base->aliases);
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a->redirects = ap_append_arrays(p, overrides->redirects, base->redirects);
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return a;
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}
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static void *merge_alias_dir_config(pool *p, void *basev, void *overridesv)
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{
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alias_dir_conf *a =
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(alias_dir_conf *) ap_pcalloc(p, sizeof(alias_dir_conf));
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alias_dir_conf *base = (alias_dir_conf *) basev, *overrides = (alias_dir_conf *) overridesv;
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a->redirects = ap_append_arrays(p, overrides->redirects, base->redirects);
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return a;
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}
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static const char *add_alias_internal(cmd_parms *cmd, void *dummy, char *f, char *r,
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int use_regex)
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{
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server_rec *s = cmd->server;
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alias_server_conf *conf =
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(alias_server_conf *) ap_get_module_config(s->module_config, &alias_module);
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alias_entry *new = ap_push_array(conf->aliases);
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/* XX r can NOT be relative to DocumentRoot here... compat bug. */
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if (use_regex) {
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new->regexp = ap_pregcomp(cmd->pool, f, REG_EXTENDED);
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if (new->regexp == NULL)
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return "Regular expression could not be compiled.";
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}
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new->fake = f;
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new->real = r;
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new->handler = cmd->info;
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return NULL;
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}
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static const char *add_alias(cmd_parms *cmd, void *dummy, char *f, char *r)
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{
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return add_alias_internal(cmd, dummy, f, r, 0);
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}
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static const char *add_alias_regex(cmd_parms *cmd, void *dummy, char *f, char *r)
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{
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return add_alias_internal(cmd, dummy, f, r, 1);
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}
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static const char *add_redirect_internal(cmd_parms *cmd, alias_dir_conf * dirconf,
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char *arg1, char *arg2, char *arg3,
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int use_regex)
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{
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alias_entry *new;
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server_rec *s = cmd->server;
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alias_server_conf *serverconf =
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(alias_server_conf *) ap_get_module_config(s->module_config, &alias_module);
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int status = (int) (long) cmd->info;
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regex_t *r = NULL;
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char *f = arg2;
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char *url = arg3;
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if (!strcasecmp(arg1, "gone"))
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status = HTTP_GONE;
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else if (!strcasecmp(arg1, "permanent"))
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status = HTTP_MOVED_PERMANENTLY;
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else if (!strcasecmp(arg1, "temp"))
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status = HTTP_MOVED_TEMPORARILY;
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else if (!strcasecmp(arg1, "seeother"))
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status = HTTP_SEE_OTHER;
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else if (ap_isdigit(*arg1))
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status = atoi(arg1);
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else {
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f = arg1;
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url = arg2;
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}
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if (use_regex) {
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r = ap_pregcomp(cmd->pool, f, REG_EXTENDED);
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if (r == NULL)
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return "Regular expression could not be compiled.";
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}
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if (ap_is_HTTP_REDIRECT(status)) {
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if (!url)
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return "URL to redirect to is missing";
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if (!use_regex && !ap_is_url(url))
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return "Redirect to non-URL";
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}
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else {
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if (url)
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return "Redirect URL not valid for this status";
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}
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if (cmd->path)
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new = ap_push_array(dirconf->redirects);
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else
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new = ap_push_array(serverconf->redirects);
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new->fake = f;
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new->real = url;
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new->regexp = r;
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new->redir_status = status;
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return NULL;
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}
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static const char *add_redirect(cmd_parms *cmd, alias_dir_conf * dirconf, char *arg1,
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char *arg2, char *arg3)
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{
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return add_redirect_internal(cmd, dirconf, arg1, arg2, arg3, 0);
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}
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static const char *add_redirect_regex(cmd_parms *cmd, alias_dir_conf * dirconf,
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char *arg1, char *arg2, char *arg3)
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{
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return add_redirect_internal(cmd, dirconf, arg1, arg2, arg3, 1);
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}
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static const command_rec alias_cmds[] =
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{
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{"Alias", add_alias, NULL, RSRC_CONF, TAKE2,
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"a fakename and a realname"},
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{"ScriptAlias", add_alias, "cgi-script", RSRC_CONF, TAKE2,
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"a fakename and a realname"},
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{"Redirect", add_redirect, (void *) HTTP_MOVED_TEMPORARILY,
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OR_FILEINFO, TAKE23,
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"an optional status, then document to be redirected and destination URL"},
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{"AliasMatch", add_alias_regex, NULL, RSRC_CONF, TAKE2,
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"a regular expression and a filename"},
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{"ScriptAliasMatch", add_alias_regex, "cgi-script", RSRC_CONF, TAKE2,
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"a regular expression and a filename"},
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{"RedirectMatch", add_redirect_regex, (void *) HTTP_MOVED_TEMPORARILY,
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OR_FILEINFO, TAKE23,
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"an optional status, then a regular expression and destination URL"},
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{"RedirectTemp", add_redirect, (void *) HTTP_MOVED_TEMPORARILY,
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OR_FILEINFO, TAKE2,
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"a document to be redirected, then the destination URL"},
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{"RedirectPermanent", add_redirect, (void *) HTTP_MOVED_PERMANENTLY,
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OR_FILEINFO, TAKE2,
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"a document to be redirected, then the destination URL"},
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{NULL}
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};
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static int alias_matches(const char *uri, const char *alias_fakename)
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{
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const char *end_fakename = alias_fakename + strlen(alias_fakename);
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const char *aliasp = alias_fakename, *urip = uri;
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while (aliasp < end_fakename) {
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if (*aliasp == '/') {
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/* any number of '/' in the alias matches any number in
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* the supplied URI, but there must be at least one...
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*/
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if (*urip != '/')
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return 0;
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while (*aliasp == '/')
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++aliasp;
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while (*urip == '/')
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++urip;
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}
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else {
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/* Other characters are compared literally */
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if (*urip++ != *aliasp++)
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return 0;
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}
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}
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/* Check last alias path component matched all the way */
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if (aliasp[-1] != '/' && *urip != '\0' && *urip != '/')
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return 0;
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/* Return number of characters from URI which matched (may be
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* greater than length of alias, since we may have matched
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* doubled slashes)
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*/
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return urip - uri;
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}
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static char *try_alias_list(request_rec *r, array_header *aliases, int doesc, int *status)
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{
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alias_entry *entries = (alias_entry *) aliases->elts;
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regmatch_t regm[10];
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char *found = NULL;
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int i;
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for (i = 0; i < aliases->nelts; ++i) {
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alias_entry *p = &entries[i];
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int l;
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if (p->regexp) {
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if (!ap_regexec(p->regexp, r->uri, p->regexp->re_nsub + 1, regm, 0)) {
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if (p->real) {
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found = ap_pregsub(r->pool, p->real, r->uri,
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p->regexp->re_nsub + 1, regm);
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if (found && doesc) {
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found = ap_escape_uri(r->pool, found);
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}
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}
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else {
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/* need something non-null */
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found = ap_pstrdup(r->pool, "");
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}
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}
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}
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else {
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l = alias_matches(r->uri, p->fake);
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if (l > 0) {
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if (doesc) {
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char *escurl;
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escurl = ap_os_escape_path(r->pool, r->uri + l, 1);
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found = ap_pstrcat(r->pool, p->real, escurl, NULL);
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}
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else
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found = ap_pstrcat(r->pool, p->real, r->uri + l, NULL);
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}
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}
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if (found) {
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if (p->handler) { /* Set handler, and leave a note for mod_cgi */
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r->handler = p->handler;
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ap_table_setn(r->notes, "alias-forced-type", r->handler);
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}
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*status = p->redir_status;
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return found;
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}
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}
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return NULL;
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}
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static int translate_alias_redir(request_rec *r)
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{
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void *sconf = r->server->module_config;
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alias_server_conf *serverconf =
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(alias_server_conf *) ap_get_module_config(sconf, &alias_module);
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char *ret;
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int status;
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if (r->uri[0] != '/' && r->uri[0] != '\0')
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return DECLINED;
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if ((ret = try_alias_list(r, serverconf->redirects, 1, &status)) != NULL) {
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if (ap_is_HTTP_REDIRECT(status)) {
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/* include QUERY_STRING if any */
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if (r->args) {
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ret = ap_pstrcat(r->pool, ret, "?", r->args, NULL);
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}
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ap_table_setn(r->headers_out, "Location", ret);
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}
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return status;
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}
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if ((ret = try_alias_list(r, serverconf->aliases, 0, &status)) != NULL) {
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r->filename = ret;
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return OK;
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}
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return DECLINED;
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}
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static int fixup_redir(request_rec *r)
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{
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void *dconf = r->per_dir_config;
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alias_dir_conf *dirconf =
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(alias_dir_conf *) ap_get_module_config(dconf, &alias_module);
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char *ret;
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int status;
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/* It may have changed since last time, so try again */
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if ((ret = try_alias_list(r, dirconf->redirects, 1, &status)) != NULL) {
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if (ap_is_HTTP_REDIRECT(status))
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ap_table_setn(r->headers_out, "Location", ret);
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return status;
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}
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return DECLINED;
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}
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module MODULE_VAR_EXPORT alias_module =
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{
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STANDARD_MODULE_STUFF,
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NULL, /* initializer */
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create_alias_dir_config, /* dir config creater */
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merge_alias_dir_config, /* dir merger --- default is to override */
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create_alias_config, /* server config */
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merge_alias_config, /* merge server configs */
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alias_cmds, /* command table */
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NULL, /* handlers */
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translate_alias_redir, /* filename translation */
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NULL, /* check_user_id */
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NULL, /* check auth */
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NULL, /* check access */
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NULL, /* type_checker */
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fixup_redir, /* fixups */
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NULL, /* logger */
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NULL, /* header parser */
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NULL, /* child_init */
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NULL, /* child_exit */
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NULL /* post read-request */
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};
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