Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

278 lines (221 sloc) 6.23 kb
/* -*- 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 "regex.h"
#include "avl.h"
#include "util.h"
#define ENTRIES "regex"
struct cherokee_regex_table {
cherokee_avl_t cache;
CHEROKEE_RWLOCK_T (rwlock);
};
ret_t
cherokee_regex_table_new (cherokee_regex_table_t **table)
{
CHEROKEE_NEW_STRUCT (n, regex_table);
/* Init
*/
CHEROKEE_RWLOCK_INIT (&n->rwlock, NULL);
cherokee_avl_init (&n->cache);
/* Return the new object
*/
*table = n;
return ret_ok;
}
ret_t
cherokee_regex_table_free (cherokee_regex_table_t *table)
{
CHEROKEE_RWLOCK_DESTROY (&table->rwlock);
cherokee_avl_mrproper (&table->cache, free);
free(table);
return ret_ok;
}
static ret_t
_add (cherokee_regex_table_t *table, char *pattern, void **regex)
{
ret_t ret;
const char *error_msg;
int error_offset;
void *tmp = NULL;
/* It wasn't in the cache. Lets go to compile the pattern..
* First of all, we have to check again the table because another
* thread could create a new entry after the previous unlock.
*/
CHEROKEE_RWLOCK_WRITER (&table->rwlock);
ret = cherokee_avl_get_ptr (&table->cache, pattern, &tmp);
if ((tmp != NULL) && (ret == ret_ok)) {
if (regex != NULL)
*regex = tmp;
CHEROKEE_RWLOCK_UNLOCK (&table->rwlock);
return ret_ok;
}
tmp = pcre_compile (pattern, 0, &error_msg, &error_offset, NULL);
if (tmp == NULL) {
LOG_ERROR (CHEROKEE_ERROR_REGEX_COMPILATION, pattern, error_msg, error_offset);
CHEROKEE_RWLOCK_UNLOCK (&table->rwlock);
return ret_error;
}
cherokee_avl_add_ptr (&table->cache, pattern, tmp);
CHEROKEE_RWLOCK_UNLOCK (&table->rwlock);
if (regex != NULL)
*regex = tmp;
return ret_ok;
}
ret_t
cherokee_regex_table_get (cherokee_regex_table_t *table, char *pattern, void **regex)
{
ret_t ret;
/* Check if it is already in the cache
*/
CHEROKEE_RWLOCK_READER(&table->rwlock);
ret = cherokee_avl_get_ptr (&table->cache, pattern, regex);
CHEROKEE_RWLOCK_UNLOCK(&table->rwlock);
if (ret == ret_ok)
return ret_ok;
/* It wasn't there; add a new entry
*/
return _add (table, pattern, regex);
}
ret_t
cherokee_regex_table_add (cherokee_regex_table_t *table, char *pattern)
{
return _add (table, pattern, NULL);
}
/* RegEx lists
*/
static ret_t
configure_rewrite_entry (cherokee_list_t *list,
cherokee_config_node_t *conf,
cherokee_regex_table_t *regexs)
{
ret_t ret;
cherokee_regex_entry_t *n;
cherokee_buffer_t *substring;
cint_t hidden = 1;
pcre *re = NULL;
cherokee_buffer_t *regex = NULL;
TRACE(ENTRIES, "Converting rewrite rule '%s'\n", conf->key.buf);
/* Query conf
*/
cherokee_config_node_read_int (conf, "show", &hidden);
hidden = !hidden;
ret = cherokee_config_node_read (conf, "regex", &regex);
if (ret == ret_ok) {
ret = cherokee_regex_table_get (regexs, regex->buf, (void **)&re);
if (ret != ret_ok)
return ret;
}
ret = cherokee_config_node_read (conf, "substring", &substring);
if (ret != ret_ok)
return ret;
/* New RegEx
*/
n = (cherokee_regex_entry_t *) malloc(sizeof(cherokee_regex_entry_t));
if (unlikely (n == NULL))
return ret_nomem;
INIT_LIST_HEAD (&n->listed);
n->re = re;
n->hidden = hidden;
cherokee_buffer_init (&n->subs);
cherokee_buffer_add_buffer (&n->subs, substring);
/* Add the list
*/
cherokee_list_add_tail (&n->listed, list);
return ret_ok;
}
ret_t
cherokee_regex_list_configure (cherokee_list_t *list,
cherokee_config_node_t *conf,
cherokee_regex_table_t *regexs)
{
ret_t ret;
cherokee_list_t *i;
cherokee_config_node_foreach (i, conf) {
ret = configure_rewrite_entry (list, CONFIG_NODE(i), regexs);
if (ret != ret_ok)
return ret;
}
return ret_ok;
}
ret_t
cherokee_regex_list_mrproper (cherokee_list_t *list)
{
cherokee_list_t *i, *tmp;
list_for_each_safe (i, tmp, list) {
cherokee_regex_entry_t *n = REGEX_ENTRY(i);
cherokee_buffer_mrproper (&n->subs);
free (i);
}
return ret_ok;
}
ret_t
cherokee_regex_substitute (cherokee_buffer_t *regex_str,
cherokee_buffer_t *source,
cherokee_buffer_t *target,
cint_t ovector[],
cint_t stringcount,
char dollar_char)
{
cint_t re;
char *s;
char num;
cherokee_boolean_t dollar = false;
const char *substring = NULL;
for (s = regex_str->buf; *s != '\0'; s++) {
if (! dollar) {
if (*s == dollar_char)
dollar = true;
else
cherokee_buffer_add_char (target, *s);
continue;
}
/* Convert the $<num>. Limit 99.
*/
if ((*s >= '0') && (*s <= '9')) {
num = *s - '0';
if ((s[1] >= '0') && (s[1] <= '9')) {
s++;
num = (num * 10) + (*s - '0');
}
} else {
/* Add the characters if it wasn't a number
*/
cherokee_buffer_add_char (target, dollar_char);
cherokee_buffer_add_char (target, *s);
dollar = false;
continue;
}
/* Perform the actually substitution
*/
substring = NULL;
re = pcre_get_substring (source->buf, ovector, stringcount, num, &substring);
if ((re < 0) || (substring == NULL)) {
dollar = false;
continue;
}
cherokee_buffer_add (target, substring, strlen(substring));
pcre_free_substring (substring);
dollar = false;
}
return ret_ok;
}
Jump to Line
Something went wrong with that request. Please try again.