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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\HttpFoundation\Request;
use Symfony\Component\Routing\Exception\ExceptionInterface;
use Symfony\Component\Routing\Route;
use Symfony\Component\Routing\RouteCollection;
/**
* TraceableUrlMatcher helps debug path info matching by tracing the match.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class TraceableUrlMatcher extends UrlMatcher
{
public const ROUTE_DOES_NOT_MATCH = 0;
public const ROUTE_ALMOST_MATCHES = 1;
public const ROUTE_MATCHES = 2;
protected $traces;
public function getTraces(string $pathinfo)
{
$this->traces = [];
try {
$this->match($pathinfo);
} catch (ExceptionInterface $e) {
}
return $this->traces;
}
public function getTracesForRequest(Request $request)
{
$this->request = $request;
$traces = $this->getTraces($request->getPathInfo());
$this->request = null;
return $traces;
}
protected function matchCollection(string $pathinfo, RouteCollection $routes)
{
// HEAD and GET are equivalent as per RFC
if ('HEAD' === $method = $this->context->getMethod()) {
$method = 'GET';
}
$supportsTrailingSlash = 'GET' === $method && $this instanceof RedirectableUrlMatcherInterface;
$trimmedPathinfo = rtrim($pathinfo, '/') ?: '/';
foreach ($routes as $name => $route) {
$compiledRoute = $route->compile();
$staticPrefix = rtrim($compiledRoute->getStaticPrefix(), '/');
$requiredMethods = $route->getMethods();
// check the static prefix of the URL first. Only use the more expensive preg_match when it matches
if ('' !== $staticPrefix && !str_starts_with($trimmedPathinfo, $staticPrefix)) {
$this->addTrace(sprintf('Path "%s" does not match', $route->getPath()), self::ROUTE_DOES_NOT_MATCH, $name, $route);
continue;
}
$regex = $compiledRoute->getRegex();
$pos = strrpos($regex, '$');
$hasTrailingSlash = '/' === $regex[$pos - 1];
$regex = substr_replace($regex, '/?$', $pos - $hasTrailingSlash, 1 + $hasTrailingSlash);
if (!preg_match($regex, $pathinfo, $matches)) {
// does it match without any requirements?
$r = new Route($route->getPath(), $route->getDefaults(), [], $route->getOptions());
$cr = $r->compile();
if (!preg_match($cr->getRegex(), $pathinfo)) {
$this->addTrace(sprintf('Path "%s" does not match', $route->getPath()), self::ROUTE_DOES_NOT_MATCH, $name, $route);
continue;
}
foreach ($route->getRequirements() as $n => $regex) {
$r = new Route($route->getPath(), $route->getDefaults(), [$n => $regex], $route->getOptions());
$cr = $r->compile();
if (\in_array($n, $cr->getVariables()) && !preg_match($cr->getRegex(), $pathinfo)) {
$this->addTrace(sprintf('Requirement for "%s" does not match (%s)', $n, $regex), self::ROUTE_ALMOST_MATCHES, $name, $route);
continue 2;
}
}
continue;
}
$hasTrailingVar = $trimmedPathinfo !== $pathinfo && preg_match('#\{\w+\}/?$#', $route->getPath());
if ($hasTrailingVar && ($hasTrailingSlash || (null === $m = $matches[\count($compiledRoute->getPathVariables())] ?? null) || '/' !== ($m[-1] ?? '/')) && preg_match($regex, $trimmedPathinfo, $m)) {
if ($hasTrailingSlash) {
$matches = $m;
} else {
$hasTrailingVar = false;
}
}
$hostMatches = [];
if ($compiledRoute->getHostRegex() && !preg_match($compiledRoute->getHostRegex(), $this->context->getHost(), $hostMatches)) {
$this->addTrace(sprintf('Host "%s" does not match the requirement ("%s")', $this->context->getHost(), $route->getHost()), self::ROUTE_ALMOST_MATCHES, $name, $route);
continue;
}
$status = $this->handleRouteRequirements($pathinfo, $name, $route);
if (self::REQUIREMENT_MISMATCH === $status[0]) {
$this->addTrace(sprintf('Condition "%s" does not evaluate to "true"', $route->getCondition()), self::ROUTE_ALMOST_MATCHES, $name, $route);
continue;
}
if ('/' !== $pathinfo && !$hasTrailingVar && $hasTrailingSlash === ($trimmedPathinfo === $pathinfo)) {
if ($supportsTrailingSlash && (!$requiredMethods || \in_array('GET', $requiredMethods))) {
$this->addTrace('Route matches!', self::ROUTE_MATCHES, $name, $route);
return $this->allow = $this->allowSchemes = [];
}
$this->addTrace(sprintf('Path "%s" does not match', $route->getPath()), self::ROUTE_DOES_NOT_MATCH, $name, $route);
continue;
}
if ($route->getSchemes() && !$route->hasScheme($this->context->getScheme())) {
$this->allowSchemes = array_merge($this->allowSchemes, $route->getSchemes());
$this->addTrace(sprintf('Scheme "%s" does not match any of the required schemes (%s)', $this->context->getScheme(), implode(', ', $route->getSchemes())), self::ROUTE_ALMOST_MATCHES, $name, $route);
continue;
}
if ($requiredMethods && !\in_array($method, $requiredMethods)) {
$this->allow = array_merge($this->allow, $requiredMethods);
$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);
continue;
}
$this->addTrace('Route matches!', self::ROUTE_MATCHES, $name, $route);
return $this->getAttributes($route, $name, array_replace($matches, $hostMatches, $status[1] ?? []));
}
return [];
}
private function addTrace(string $log, int $level = self::ROUTE_DOES_NOT_MATCH, string $name = null, Route $route = null)
{
$this->traces[] = [
'log' => $log,
'name' => $name,
'level' => $level,
'path' => null !== $route ? $route->getPath() : null,
];
}
}
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