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