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ApacheUrlMatcher.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\Routing\Matcher;
013
014 use Symfony\Component\Routing\Exception\MethodNotAllowedException;
015
016 /**
017 * ApacheUrlMatcher matches URL based on Apache mod_rewrite matching (see ApacheMatcherDumper).
018 *
019 * @author Fabien Potencier <fabien@symfony.com>
020 * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
021 */
022 class ApacheUrlMatcher extends UrlMatcher
023 {
024 /**
025 * Tries to match a URL based on Apache mod_rewrite matching.
026 *
027 * Returns false if no route matches the URL.
028 *
029 * @param string $pathinfo The pathinfo to be parsed
030 *
031 * @return array An array of parameters
032 *
033 * @throws MethodNotAllowedException If the current method is not allowed
034 */
035 public function match($pathinfo)
036 {
037 $parameters = array();
038 $defaults = array();
039 $allow = array();
040 $route = null;
041
042 foreach ($this->denormalizeValues($_SERVER) as $key => $value) {
043 $name = $key;
044
045 // skip non-routing variables
046 // this improves performance when $_SERVER contains many usual
047 // variables like HTTP_*, DOCUMENT_ROOT, REQUEST_URI, ...
048 if (false === strpos($name, '_ROUTING_')) {
049 continue;
050 }
051
052 while (0 === strpos($name, 'REDIRECT_')) {
053 $name = substr($name, 9);
054 }
055
056 // expect _ROUTING_<type>_<name>
057 // or _ROUTING_<type>
058
059 if (0 !== strpos($name, '_ROUTING_')) {
060 continue;
061 }
062 if (false !== $pos = strpos($name, '_', 9)) {
063 $type = substr($name, 9, $pos-9);
064 $name = substr($name, $pos+1);
065 } else {
066 $type = substr($name, 9);
067 }
068
069 if ('param' === $type) {
070 if ('' !== $value) {
071 $parameters[$name] = $value;
072 }
073 } elseif ('default' === $type) {
074 $defaults[$name] = $value;
075 } elseif ('route' === $type) {
076 $route = $value;
077 } elseif ('allow' === $type) {
078 $allow[] = $name;
079 }
080
081 unset($_SERVER[$key]);
082 }
083
084 if (null !== $route) {
085 $parameters['_route'] = $route;
086
087 return $this->mergeDefaults($parameters, $defaults);
088 } elseif (0 < count($allow)) {
089 throw new MethodNotAllowedException($allow);
090 } else {
091 return parent::match($pathinfo);
092 }
093 }
094
095 /**
096 * Denormalizes an array of values.
097 *
098 * @param string[] $values
099 *
100 * @return array
101 */
102 private function denormalizeValues(array $values)
103 {
104 $normalizedValues = array();
105 foreach ($values as $key => $value) {
106 if (preg_match('~^(.*)\[(\d+)\]$~', $key, $matches)) {
107 if (!isset($normalizedValues[$matches[1]])) {
108 $normalizedValues[$matches[1]] = array();
109 }
110 $normalizedValues[$matches[1]][(int) $matches[2]] = $value;
111 } else {
112 $normalizedValues[$key] = $value;
113 }
114 }
115
116 return $normalizedValues;
117 }
118 }
119