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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* Cherokee
*
* Authors:
* Alvaro Lopez Ortega <alvaro@alobbs.com>
*
* Copyright (C) 2001-2011 Alvaro Lopez Ortega
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include "common-internal.h"
#include "rule_url_arg.h"
#include "plugin_loader.h"
#include "server-protected.h"
#include "connection-protected.h"
#include "util.h"
#include "pcre/pcre.h"
#define ENTRIES "rule,url_arg"
PLUGIN_INFO_RULE_EASIEST_INIT(url_arg);
static ret_t
check_argument (cherokee_rule_url_arg_t *rule,
cherokee_buffer_t *value)
{
int re;
/* Check whether it matches
*/
re = pcre_exec (rule->pcre, NULL,
value->buf, value->len,
0, 0, NULL, 0);
if (re < 0) {
TRACE (ENTRIES, "Parameter value '%s' didn't match with '%s'\n",
value->buf, rule->match.buf);
return ret_not_found;
}
TRACE (ENTRIES, "Parameter value '%s' matched with '%s'\n",
value->buf, rule->match.buf);
return ret_ok;
}
static ret_t
match_avl_func (cherokee_buffer_t *key, void *val, void *param)
{
ret_t ret;
cherokee_buffer_t *value = BUF(val);
cherokee_rule_url_arg_t *rule = RULE_URL_ARG(param);
UNUSED(key);
/* Skip key-only entries (with no value)
*/
if (value == NULL) {
return ret_ok;
}
/* Check the value
*/
ret = check_argument (rule, value);
if (ret == ret_not_found) {
return ret_ok;
}
/* Found */
return ret_eof;
}
static ret_t
match (cherokee_rule_url_arg_t *rule,
cherokee_connection_t *conn,
cherokee_config_entry_t *ret_conf)
{
ret_t ret;
cherokee_buffer_t *value;
UNUSED(ret_conf);
/* Parse HTTP arguments
*/
ret = cherokee_connection_parse_args (conn);
if (ret != ret_ok) {
return ret_not_found;
}
if (conn->arguments == NULL) {
return ret_not_found;
}
/* Retrieve the right one
*/
if (! cherokee_buffer_is_empty (&rule->arg))
{
ret = cherokee_avl_get (conn->arguments, &rule->arg, (void **)&value);
if (ret != ret_ok) {
return ret_not_found;
}
return check_argument (rule, value);
}
/* Check all arguments
*/
else {
ret = cherokee_avl_while (conn->arguments, match_avl_func, rule, NULL, NULL);
if (ret == ret_eof) {
return ret_ok;
}
}
return ret_not_found;
}
static ret_t
configure (cherokee_rule_url_arg_t *rule,
cherokee_config_node_t *conf,
cherokee_virtual_server_t *vsrv)
{
ret_t ret;
cherokee_regex_table_t *regexs = VSERVER_SRV(vsrv)->regexs;
/* Read the matching reg-ex
*/
ret = cherokee_config_node_copy (conf, "match", &rule->match);
if (ret != ret_ok) {
LOG_ERROR (CHEROKEE_ERROR_RULE_NO_PROPERTY,
RULE(rule)->priority, "match");
return ret_error;
}
/* Read the optional argument
*/
cherokee_config_node_copy (conf, "arg", &rule->arg);
/* Compile the regular expression
*/
ret = cherokee_regex_table_add (regexs, rule->match.buf);
if (ret != ret_ok)
return ret;
ret = cherokee_regex_table_get (regexs, rule->match.buf, &rule->pcre);
if (ret != ret_ok)
return ret;
return ret_ok;
}
static ret_t
_free (void *p)
{
cherokee_rule_url_arg_t *rule = RULE_URL_ARG(p);
cherokee_buffer_mrproper (&rule->arg);
cherokee_buffer_mrproper (&rule->match);
return ret_ok;
}
ret_t
cherokee_rule_url_arg_new (cherokee_rule_url_arg_t **rule)
{
CHEROKEE_NEW_STRUCT (n, rule_url_arg);
/* Parent class constructor
*/
cherokee_rule_init_base (RULE(n), PLUGIN_INFO_PTR(url_arg));
/* Virtual methods
*/
RULE(n)->match = (rule_func_match_t) match;
RULE(n)->configure = (rule_func_configure_t) configure;
MODULE(n)->free = (module_func_free_t) _free;
/* Properties
*/
n->pcre = NULL;
cherokee_buffer_init (&n->arg);
cherokee_buffer_init (&n->match);
*rule = n;
return ret_ok;
}
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