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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\HttpFoundation\Request;
015 use Symfony\Component\Routing\Exception\ExceptionInterface;
016 use Symfony\Component\Routing\Route;
017 use Symfony\Component\Routing\RouteCollection;
018
019 /**
020 * TraceableUrlMatcher helps debug path info matching by tracing the match.
021 *
022 * @author Fabien Potencier <fabien@symfony.com>
023 */
024 class TraceableUrlMatcher extends UrlMatcher
025 {
026 const ROUTE_DOES_NOT_MATCH = 0;
027 const ROUTE_ALMOST_MATCHES = 1;
028 const ROUTE_MATCHES = 2;
029
030 protected $traces;
031
032 public function getTraces($pathinfo)
033 {
034 $this->traces = array();
035
036 try {
037 $this->match($pathinfo);
038 } catch (ExceptionInterface $e) {
039 }
040
041 return $this->traces;
042 }
043
044 public function getTracesForRequest(Request $request)
045 {
046 $this->request = $request;
047 $traces = $this->getTraces($request->getPathInfo());
048 $this->request = null;
049
050 return $traces;
051 }
052
053 protected function matchCollection($pathinfo, RouteCollection $routes)
054 {
055 foreach ($routes as $name => $route) {
056 $compiledRoute = $route->compile();
057
058 if (!preg_match($compiledRoute->getRegex(), $pathinfo, $matches)) {
059 // does it match without any requirements?
060 $r = new Route($route->getPath(), $route->getDefaults(), array(), $route->getOptions());
061 $cr = $r->compile();
062 if (!preg_match($cr->getRegex(), $pathinfo)) {
063 $this->addTrace(sprintf('Path "%s" does not match', $route->getPath()), self::ROUTE_DOES_NOT_MATCH, $name, $route);
064
065 continue;
066 }
067
068 foreach ($route->getRequirements() as $n => $regex) {
069 $r = new Route($route->getPath(), $route->getDefaults(), array($n => $regex), $route->getOptions());
070 $cr = $r->compile();
071
072 if (in_array($n, $cr->getVariables()) && !preg_match($cr->getRegex(), $pathinfo)) {
073 $this->addTrace(sprintf('Requirement for "%s" does not match (%s)', $n, $regex), self::ROUTE_ALMOST_MATCHES, $name, $route);
074
075 continue 2;
076 }
077 }
078
079 continue;
080 }
081
082 // check host requirement
083 $hostMatches = array();
084 if ($compiledRoute->getHostRegex() && !preg_match($compiledRoute->getHostRegex(), $this->context->getHost(), $hostMatches)) {
085 $this->addTrace(sprintf('Host "%s" does not match the requirement ("%s")', $this->context->getHost(), $route->getHost()), self::ROUTE_ALMOST_MATCHES, $name, $route);
086
087 continue;
088 }
089
090 // check HTTP method requirement
091 if ($requiredMethods = $route->getMethods()) {
092 // HEAD and GET are equivalent as per RFC
093 if ('HEAD' === $method = $this->context->getMethod()) {
094 $method = 'GET';
095 }
096
097 if (!in_array($method, $requiredMethods)) {
098 $this->allow = array_merge($this->allow, $requiredMethods);
099
100 $this->addTrace(sprintf('Method "%s" does not match any of the required methods (%s)', $this->context->getMethod(), implode(', ', $requiredMethods)), self::ROUTE_ALMOST_MATCHES, $name, $route);
101
102 continue;
103 }
104 }
105
106 // check condition
107 if ($condition = $route->getCondition()) {
108 if (!$this->getExpressionLanguage()->evaluate($condition, array('context' => $this->context, 'request' => $this->request))) {
109 $this->addTrace(sprintf('Condition "%s" does not evaluate to "true"', $condition), self::ROUTE_ALMOST_MATCHES, $name, $route);
110
111 continue;
112 }
113 }
114
115 // check HTTP scheme requirement
116 if ($requiredSchemes = $route->getSchemes()) {
117 $scheme = $this->context->getScheme();
118
119 if (!$route->hasScheme($scheme)) {
120 $this->addTrace(sprintf('Scheme "%s" does not match any of the required schemes (%s); the user will be redirected to first required scheme', $scheme, implode(', ', $requiredSchemes)), self::ROUTE_ALMOST_MATCHES, $name, $route);
121
122 return true;
123 }
124 }
125
126 $this->addTrace('Route matches!', self::ROUTE_MATCHES, $name, $route);
127
128 return true;
129 }
130 }
131
132 private function addTrace($log, $level = self::ROUTE_DOES_NOT_MATCH, $name = null, $route = null)
133 {
134 $this->traces[] = array(
135 'log' => $log,
136 'name' => $name,
137 'level' => $level,
138 'path' => null !== $route ? $route->getPath() : null,
139 );
140 }
141 }
142