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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Routing\Matcher;
use Symfony\Component\Routing\Exception\MethodNotAllowedException;
/**
* ApacheUrlMatcher matches URL based on Apache mod_rewrite matching (see ApacheMatcherDumper).
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Arnaud Le Blanc <arnaud.lb@gmail.com>
*/
class ApacheUrlMatcher extends UrlMatcher
{
/**
* Tries to match a URL based on Apache mod_rewrite matching.
*
* Returns false if no route matches the URL.
*
* @param string $pathinfo The pathinfo to be parsed
*
* @return array An array of parameters
*
* @throws MethodNotAllowedException If the current method is not allowed
*/
public function match($pathinfo)
{
$parameters = array();
$defaults = array();
$allow = array();
$route = null;
foreach ($this->denormalizeValues($_SERVER) as $key => $value) {
$name = $key;
// skip non-routing variables
// this improves performance when $_SERVER contains many usual
// variables like HTTP_*, DOCUMENT_ROOT, REQUEST_URI, ...
if (false === strpos($name, '_ROUTING_')) {
continue;
}
while (0 === strpos($name, 'REDIRECT_')) {
$name = substr($name, 9);
}
// expect _ROUTING_<type>_<name>
// or _ROUTING_<type>
if (0 !== strpos($name, '_ROUTING_')) {
continue;
}
if (false !== $pos = strpos($name, '_', 9)) {
$type = substr($name, 9, $pos-9);
$name = substr($name, $pos+1);
} else {
$type = substr($name, 9);
}
if ('param' === $type) {
if ('' !== $value) {
$parameters[$name] = $value;
}
} elseif ('default' === $type) {
$defaults[$name] = $value;
} elseif ('route' === $type) {
$route = $value;
} elseif ('allow' === $type) {
$allow[] = $name;
}
unset($_SERVER[$key]);
}
if (null !== $route) {
$parameters['_route'] = $route;
return $this->mergeDefaults($parameters, $defaults);
} elseif (0 < count($allow)) {
throw new MethodNotAllowedException($allow);
} else {
return parent::match($pathinfo);
}
}
/**
* Denormalizes an array of values.
*
* @param string[] $values
*
* @return array
*/
private function denormalizeValues(array $values)
{
$normalizedValues = array();
foreach ($values as $key => $value) {
if (preg_match('~^(.*)\[(\d+)\]$~', $key, $matches)) {
if (!isset($normalizedValues[$matches[1]])) {
$normalizedValues[$matches[1]] = array();
}
$normalizedValues[$matches[1]][(int) $matches[2]] = $value;
} else {
$normalizedValues[$key] = $value;
}
}
return $normalizedValues;
}
}