<?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\ExpressionLanguage\ExpressionFunctionProviderInterface;
use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Exception\MethodNotAllowedException;
use Symfony\Component\Routing\Exception\NoConfigurationException;
use Symfony\Component\Routing\Exception\ResourceNotFoundException;
use Symfony\Component\Routing\RequestContext;
use Symfony\Component\Routing\Route;
use Symfony\Component\Routing\RouteCollection;
/**
* UrlMatcher matches URL based on a set of routes.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class UrlMatcher implements UrlMatcherInterface, RequestMatcherInterface
{
const REQUIREMENT_MATCH = 0;
const REQUIREMENT_MISMATCH = 1;
const ROUTE_MATCH = 2;
protected $context;
protected $allow = [];
protected $routes;
protected $request;
protected $expressionLanguage;
/**
* @var ExpressionFunctionProviderInterface[]
*/
protected $expressionLanguageProviders = [];
public function __construct(RouteCollection $routes, RequestContext $context)
{
$this->routes = $routes;
$this->context = $context;
}
/**
* {@inheritdoc}
*/
public function setContext(RequestContext $context)
{
$this->context = $context;
}
/**
* {@inheritdoc}
*/
public function getContext()
{
return $this->context;
}
/**
* {@inheritdoc}
*/
public function match($pathinfo)
{
$this->allow = [];
if ($ret = $this->matchCollection(rawurldecode($pathinfo), $this->routes)) {
return $ret;
}
if ('/' === $pathinfo && !$this->allow) {
throw new NoConfigurationException();
}
throw 0 < \count($this->allow) ? new MethodNotAllowedException(array_unique($this->allow)) : new ResourceNotFoundException(sprintf('No routes found for "%s".', $pathinfo));
}
/**
* {@inheritdoc}
*/
public function matchRequest(Request $request)
{
$this->request = $request;
$ret = $this->match($request->getPathInfo());
$this->request = null;
return $ret;
}
public function addExpressionLanguageProvider(ExpressionFunctionProviderInterface $provider)
{
$this->expressionLanguageProviders[] = $provider;
}
/**
* Tries to match a URL with a set of routes.
*
* @param string $pathinfo The path info to be parsed
* @param RouteCollection $routes The set of routes
*
* @return array An array of parameters
*
* @throws NoConfigurationException If no routing configuration could be found
* @throws ResourceNotFoundException If the resource could not be found
* @throws MethodNotAllowedException If the resource was found but the request method is not allowed
*/
protected function matchCollection($pathinfo, RouteCollection $routes)
{
// HEAD and GET are equivalent as per RFC
if ('HEAD' === $method = $this->context->getMethod()) {
$method = 'GET';
}
$supportsTrailingSlash = '/' !== $pathinfo && '' !== $pathinfo && $this instanceof RedirectableUrlMatcherInterface;
foreach ($routes as $name => $route) {
$compiledRoute = $route->compile();
$staticPrefix = $compiledRoute->getStaticPrefix();
$requiredMethods = $route->getMethods();
// check the static prefix of the URL first. Only use the more expensive preg_match when it matches
if ('' === $staticPrefix || 0 === strpos($pathinfo, $staticPrefix)) {
// no-op
} elseif (!$supportsTrailingSlash || ($requiredMethods && !\in_array('GET', $requiredMethods)) || 'GET' !== $method) {
continue;
} elseif ('/' === substr($staticPrefix, -1) && substr($staticPrefix, 0, -1) === $pathinfo) {
return $this->allow = [];
} else {
continue;
}
$regex = $compiledRoute->getRegex();
if ($supportsTrailingSlash && $pos = strpos($regex, '/$')) {
$regex = substr($regex, 0, $pos).'/?$'.substr($regex, $pos + 2);
$hasTrailingSlash = true;
} else {
$hasTrailingSlash = false;
}
if (!preg_match($regex, $pathinfo, $matches)) {
continue;
}
if ($hasTrailingSlash && '/' !== substr($pathinfo, -1)) {
if ((!$requiredMethods || \in_array('GET', $requiredMethods)) && 'GET' === $method) {
return $this->allow = [];
}
continue;
}
$hostMatches = [];
if ($compiledRoute->getHostRegex() && !preg_match($compiledRoute->getHostRegex(), $this->context->getHost(), $hostMatches)) {
continue;
}
$status = $this->handleRouteRequirements($pathinfo, $name, $route);
if (self::REQUIREMENT_MISMATCH === $status[0]) {
continue;
}
// check HTTP method requirement
if ($requiredMethods) {
if (!\in_array($method, $requiredMethods)) {
if (self::REQUIREMENT_MATCH === $status[0]) {
$this->allow = array_merge($this->allow, $requiredMethods);
}
continue;
}
}
return $this->getAttributes($route, $name, array_replace($matches, $hostMatches, isset($status[1]) ? $status[1] : []));
}
return [];
}
/**
* Returns an array of values to use as request attributes.
*
* As this method requires the Route object, it is not available
* in matchers that do not have access to the matched Route instance
* (like the PHP and Apache matcher dumpers).
*
* @param Route $route The route we are matching against
* @param string $name The name of the route
* @param array $attributes An array of attributes from the matcher
*
* @return array An array of parameters
*/
protected function getAttributes(Route $route, $name, array $attributes)
{
$attributes['_route'] = $name;
return $this->mergeDefaults($attributes, $route->getDefaults());
}
/**
* Handles specific route requirements.
*
* @param string $pathinfo The path
* @param string $name The route name
* @param Route $route The route
*
* @return array The first element represents the status, the second contains additional information
*/
protected function handleRouteRequirements($pathinfo, $name, Route $route)
{
// expression condition
if ($route->getCondition() && !$this->getExpressionLanguage()->evaluate($route->getCondition(), ['context' => $this->context, 'request' => $this->request ?: $this->createRequest($pathinfo)])) {
return [self::REQUIREMENT_MISMATCH, null];
}
// check HTTP scheme requirement
$scheme = $this->context->getScheme();
$status = $route->getSchemes() && !$route->hasScheme($scheme) ? self::REQUIREMENT_MISMATCH : self::REQUIREMENT_MATCH;
return [$status, null];
}
/**
* Get merged default parameters.
*
* @param array $params The parameters
* @param array $defaults The defaults
*
* @return array Merged default parameters
*/
protected function mergeDefaults($params, $defaults)
{
foreach ($params as $key => $value) {
if (!\is_int($key)) {
$defaults[$key] = $value;
}
}
return $defaults;
}
protected function getExpressionLanguage()
{
if (null === $this->expressionLanguage) {
if (!class_exists('Symfony\Component\ExpressionLanguage\ExpressionLanguage')) {
throw new \RuntimeException('Unable to use expressions as the Symfony ExpressionLanguage component is not installed.');
}
$this->expressionLanguage = new ExpressionLanguage(null, $this->expressionLanguageProviders);
}
return $this->expressionLanguage;
}
/**
* @internal
*/
protected function createRequest($pathinfo)
{
if (!class_exists('Symfony\Component\HttpFoundation\Request')) {
return null;
}
return Request::create($this->context->getScheme().'://'.$this->context->getHost().$this->context->getBaseUrl().$pathinfo, $this->context->getMethod(), $this->context->getParameters(), [], [], [
'SCRIPT_FILENAME' => $this->context->getBaseUrl(),
'SCRIPT_NAME' => $this->context->getBaseUrl(),
]);
}
}