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TraceableUrlMatcher.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\ExceptionInterface;
015 use Symfony\Component\Routing\Route;
016 use Symfony\Component\Routing\RouteCollection;
017
018 /**
019 * TraceableUrlMatcher helps debug path info matching by tracing the match.
020 *
021 * @author Fabien Potencier <fabien@symfony.com>
022 */
023 class TraceableUrlMatcher extends UrlMatcher
024 {
025 const ROUTE_DOES_NOT_MATCH = 0;
026 const ROUTE_ALMOST_MATCHES = 1;
027 const ROUTE_MATCHES = 2;
028
029 protected $traces;
030
031 public function getTraces($pathinfo)
032 {
033 $this->traces = array();
034
035 try {
036 $this->match($pathinfo);
037 } catch (ExceptionInterface $e) {
038 }
039
040 return $this->traces;
041 }
042
043 protected function matchCollection($pathinfo, RouteCollection $routes)
044 {
045 foreach ($routes as $name => $route) {
046 $compiledRoute = $route->compile();
047
048 if (!preg_match($compiledRoute->getRegex(), $pathinfo, $matches)) {
049 // does it match without any requirements?
050 $r = new Route($route->getPath(), $route->getDefaults(), array(), $route->getOptions());
051 $cr = $r->compile();
052 if (!preg_match($cr->getRegex(), $pathinfo)) {
053 $this->addTrace(sprintf('Path "%s" does not match', $route->getPath()), self::ROUTE_DOES_NOT_MATCH, $name, $route);
054
055 continue;
056 }
057
058 foreach ($route->getRequirements() as $n => $regex) {
059 $r = new Route($route->getPath(), $route->getDefaults(), array($n => $regex), $route->getOptions());
060 $cr = $r->compile();
061
062 if (in_array($n, $cr->getVariables()) && !preg_match($cr->getRegex(), $pathinfo)) {
063 $this->addTrace(sprintf('Requirement for "%s" does not match (%s)', $n, $regex), self::ROUTE_ALMOST_MATCHES, $name, $route);
064
065 continue 2;
066 }
067 }
068
069 continue;
070 }
071
072 // check host requirement
073 $hostMatches = array();
074 if ($compiledRoute->getHostRegex() && !preg_match($compiledRoute->getHostRegex(), $this->context->getHost(), $hostMatches)) {
075 $this->addTrace(sprintf('Host "%s" does not match the requirement ("%s")', $this->context->getHost(), $route->getHost()), self::ROUTE_ALMOST_MATCHES, $name, $route);
076
077 continue;
078 }
079
080 // check HTTP method requirement
081 if ($req = $route->getRequirement('_method')) {
082 // HEAD and GET are equivalent as per RFC
083 if ('HEAD' === $method = $this->context->getMethod()) {
084 $method = 'GET';
085 }
086
087 if (!in_array($method, $req = explode('|', strtoupper($req)))) {
088 $this->allow = array_merge($this->allow, $req);
089
090 $this->addTrace(sprintf('Method "%s" does not match the requirement ("%s")', $this->context->getMethod(), implode(', ', $req)), self::ROUTE_ALMOST_MATCHES, $name, $route);
091
092 continue;
093 }
094 }
095
096 // check HTTP scheme requirement
097 if ($scheme = $route->getRequirement('_scheme')) {
098 if ($this->context->getScheme() !== $scheme) {
099 $this->addTrace(sprintf('Scheme "%s" does not match the requirement ("%s"); the user will be redirected', $this->context->getScheme(), $scheme), self::ROUTE_ALMOST_MATCHES, $name, $route);
100
101 return true;
102 }
103 }
104
105 $this->addTrace('Route matches!', self::ROUTE_MATCHES, $name, $route);
106
107 return true;
108 }
109 }
110
111 private function addTrace($log, $level = self::ROUTE_DOES_NOT_MATCH, $name = null, $route = null)
112 {
113 $this->traces[] = array(
114 'log' => $log,
115 'name' => $name,
116 'level' => $level,
117 'path' => null !== $route ? $route->getPath() : null,
118 );
119 }
120 }
121