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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* mod_dir.c: handle default index files, and trailing-/ redirects
*/
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_request.h"
#include "http_protocol.h"
#include "http_log.h"
#include "http_main.h"
#include "util_script.h"
module MODULE_VAR_EXPORT dir_module;
typedef struct dir_config_struct {
array_header *index_names;
} dir_config_rec;
#define DIR_CMD_PERMS OR_INDEXES
static const char *add_index(cmd_parms *cmd, void *dummy, char *arg)
{
dir_config_rec *d = dummy;
if (!d->index_names) {
d->index_names = ap_make_array(cmd->pool, 2, sizeof(char *));
}
*(char **)ap_push_array(d->index_names) = arg;
return NULL;
}
static const command_rec dir_cmds[] =
{
{"DirectoryIndex", add_index, NULL,
DIR_CMD_PERMS, ITERATE,
"a list of file names"},
{NULL}
};
static void *create_dir_config(pool *p, char *dummy)
{
dir_config_rec *new =
(dir_config_rec *) ap_pcalloc(p, sizeof(dir_config_rec));
new->index_names = NULL;
return (void *) new;
}
static void *merge_dir_configs(pool *p, void *basev, void *addv)
{
dir_config_rec *new = (dir_config_rec *) ap_pcalloc(p, sizeof(dir_config_rec));
dir_config_rec *base = (dir_config_rec *) basev;
dir_config_rec *add = (dir_config_rec *) addv;
new->index_names = add->index_names ? add->index_names : base->index_names;
return new;
}
static int handle_dir(request_rec *r)
{
dir_config_rec *d =
(dir_config_rec *) ap_get_module_config(r->per_dir_config,
&dir_module);
char *dummy_ptr[1];
char **names_ptr;
int num_names;
int error_notfound = 0;
if (r->uri[0] == '\0' || r->uri[strlen(r->uri) - 1] != '/') {
char *ifile;
if (r->args != NULL)
ifile = ap_pstrcat(r->pool, ap_escape_uri(r->pool, r->uri),
"/", "?", r->args, NULL);
else
ifile = ap_pstrcat(r->pool, ap_escape_uri(r->pool, r->uri),
"/", NULL);
ap_table_setn(r->headers_out, "Location",
ap_construct_url(r->pool, ifile, r));
return HTTP_MOVED_PERMANENTLY;
}
/* KLUDGE --- make the sub_req lookups happen in the right directory.
* Fixing this in the sub_req_lookup functions themselves is difficult,
* and would probably break virtual includes...
*/
if (r->filename[strlen(r->filename) - 1] != '/') {
r->filename = ap_pstrcat(r->pool, r->filename, "/", NULL);
}
if (d->index_names) {
names_ptr = (char **)d->index_names->elts;
num_names = d->index_names->nelts;
}
else {
dummy_ptr[0] = DEFAULT_INDEX;
names_ptr = dummy_ptr;
num_names = 1;
}
for (; num_names; ++names_ptr, --num_names) {
char *name_ptr = *names_ptr;
request_rec *rr = ap_sub_req_lookup_uri(name_ptr, r);
if (rr->status == HTTP_OK && S_ISREG(rr->finfo.st_mode)) {
char *new_uri = ap_escape_uri(r->pool, rr->uri);
if (rr->args != NULL)
new_uri = ap_pstrcat(r->pool, new_uri, "?", rr->args, NULL);
else if (r->args != NULL)
new_uri = ap_pstrcat(r->pool, new_uri, "?", r->args, NULL);
ap_destroy_sub_req(rr);
ap_internal_redirect(new_uri, r);
return OK;
}
/* If the request returned a redirect, propagate it to the client */
if (ap_is_HTTP_REDIRECT(rr->status) ||
(rr->status == HTTP_NOT_ACCEPTABLE && num_names == 1) ||
(rr->status == HTTP_UNAUTHORIZED && num_names == 1)) {
ap_pool_join(r->pool, rr->pool);
error_notfound = rr->status;
r->notes = ap_overlay_tables(r->pool, r->notes, rr->notes);
r->headers_out = ap_overlay_tables(r->pool, r->headers_out,
rr->headers_out);
r->err_headers_out = ap_overlay_tables(r->pool, r->err_headers_out,
rr->err_headers_out);
return error_notfound;
}
/* If the request returned something other than 404 (or 200),
* it means the module encountered some sort of problem. To be
* secure, we should return the error, rather than create
* along a (possibly unsafe) directory index.
*
* So we store the error, and if none of the listed files
* exist, we return the last error response we got, instead
* of a directory listing.
*/
if (rr->status && rr->status != HTTP_NOT_FOUND && rr->status != HTTP_OK)
error_notfound = rr->status;
ap_destroy_sub_req(rr);
}
if (error_notfound)
return error_notfound;
if (r->method_number != M_GET)
return DECLINED;
/* nothing for us to do, pass on through */
return DECLINED;
}
static const handler_rec dir_handlers[] =
{
{DIR_MAGIC_TYPE, handle_dir},
{NULL}
};
module MODULE_VAR_EXPORT dir_module =
{
STANDARD_MODULE_STUFF,
NULL, /* initializer */
create_dir_config, /* dir config creater */
merge_dir_configs, /* dir merger --- default is to override */
NULL, /* server config */
NULL, /* merge server config */
dir_cmds, /* command table */
dir_handlers, /* handlers */
NULL, /* filename translation */
NULL, /* check_user_id */
NULL, /* check auth */
NULL, /* check access */
NULL, /* type_checker */
NULL, /* fixups */
NULL, /* logger */
NULL, /* header parser */
NULL, /* child_init */
NULL, /* child_exit */
NULL /* post read-request */
};
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