242 lines
8.9 KiB
PHP
242 lines
8.9 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Routing\Loader;
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use Symfony\Component\Routing\RouteCollection;
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use Symfony\Component\Routing\Route;
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use Symfony\Component\Config\Resource\FileResource;
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use Symfony\Component\Config\Loader\FileLoader;
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use Symfony\Component\Config\Util\XmlUtils;
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/**
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* XmlFileLoader loads XML routing files.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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* @author Tobias Schultze <http://tobion.de>
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*/
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class XmlFileLoader extends FileLoader
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{
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const NAMESPACE_URI = 'http://symfony.com/schema/routing';
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const SCHEME_PATH = '/schema/routing/routing-1.0.xsd';
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/**
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* Loads an XML file.
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*
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* @param string $file An XML file path
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* @param string|null $type The resource type
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*
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* @return RouteCollection A RouteCollection instance
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*
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* @throws \InvalidArgumentException When the file cannot be loaded or when the XML cannot be
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* parsed because it does not validate against the scheme.
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*/
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public function load($file, $type = null)
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{
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$path = $this->locator->locate($file);
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$xml = $this->loadFile($path);
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$collection = new RouteCollection();
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$collection->addResource(new FileResource($path));
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// process routes and imports
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foreach ($xml->documentElement->childNodes as $node) {
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if (!$node instanceof \DOMElement) {
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continue;
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}
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$this->parseNode($collection, $node, $path, $file);
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}
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return $collection;
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}
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/**
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* Parses a node from a loaded XML file.
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*
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* @param RouteCollection $collection Collection to associate with the node
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* @param \DOMElement $node Element to parse
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* @param string $path Full path of the XML file being processed
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* @param string $file Loaded file name
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*
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* @throws \InvalidArgumentException When the XML is invalid
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*/
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protected function parseNode(RouteCollection $collection, \DOMElement $node, $path, $file)
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{
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if (self::NAMESPACE_URI !== $node->namespaceURI) {
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return;
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}
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switch ($node->localName) {
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case 'route':
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$this->parseRoute($collection, $node, $path);
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break;
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case 'import':
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$this->parseImport($collection, $node, $path, $file);
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break;
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default:
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throw new \InvalidArgumentException(sprintf('Unknown tag "%s" used in file "%s". Expected "route" or "import".', $node->localName, $path));
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function supports($resource, $type = null)
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{
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return is_string($resource) && 'xml' === pathinfo($resource, PATHINFO_EXTENSION) && (!$type || 'xml' === $type);
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}
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/**
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* Parses a route and adds it to the RouteCollection.
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*
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* @param RouteCollection $collection RouteCollection instance
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* @param \DOMElement $node Element to parse that represents a Route
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* @param string $path Full path of the XML file being processed
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*
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* @throws \InvalidArgumentException When the XML is invalid
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*/
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protected function parseRoute(RouteCollection $collection, \DOMElement $node, $path)
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{
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if ('' === ($id = $node->getAttribute('id')) || !$node->hasAttribute('path')) {
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throw new \InvalidArgumentException(sprintf('The <route> element in file "%s" must have an "id" and a "path" attribute.', $path));
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}
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$schemes = preg_split('/[\s,\|]++/', $node->getAttribute('schemes'), -1, PREG_SPLIT_NO_EMPTY);
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$methods = preg_split('/[\s,\|]++/', $node->getAttribute('methods'), -1, PREG_SPLIT_NO_EMPTY);
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list($defaults, $requirements, $options, $condition) = $this->parseConfigs($node, $path);
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$route = new Route($node->getAttribute('path'), $defaults, $requirements, $options, $node->getAttribute('host'), $schemes, $methods, $condition);
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$collection->add($id, $route);
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}
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/**
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* Parses an import and adds the routes in the resource to the RouteCollection.
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*
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* @param RouteCollection $collection RouteCollection instance
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* @param \DOMElement $node Element to parse that represents a Route
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* @param string $path Full path of the XML file being processed
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* @param string $file Loaded file name
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*
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* @throws \InvalidArgumentException When the XML is invalid
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*/
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protected function parseImport(RouteCollection $collection, \DOMElement $node, $path, $file)
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{
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if ('' === $resource = $node->getAttribute('resource')) {
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throw new \InvalidArgumentException(sprintf('The <import> element in file "%s" must have a "resource" attribute.', $path));
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}
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$type = $node->getAttribute('type');
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$prefix = $node->getAttribute('prefix');
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$host = $node->hasAttribute('host') ? $node->getAttribute('host') : null;
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$schemes = $node->hasAttribute('schemes') ? preg_split('/[\s,\|]++/', $node->getAttribute('schemes'), -1, PREG_SPLIT_NO_EMPTY) : null;
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$methods = $node->hasAttribute('methods') ? preg_split('/[\s,\|]++/', $node->getAttribute('methods'), -1, PREG_SPLIT_NO_EMPTY) : null;
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list($defaults, $requirements, $options, $condition) = $this->parseConfigs($node, $path);
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$this->setCurrentDir(dirname($path));
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$subCollection = $this->import($resource, ('' !== $type ? $type : null), false, $file);
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/* @var $subCollection RouteCollection */
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$subCollection->addPrefix($prefix);
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if (null !== $host) {
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$subCollection->setHost($host);
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}
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if (null !== $condition) {
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$subCollection->setCondition($condition);
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}
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if (null !== $schemes) {
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$subCollection->setSchemes($schemes);
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}
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if (null !== $methods) {
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$subCollection->setMethods($methods);
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}
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$subCollection->addDefaults($defaults);
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$subCollection->addRequirements($requirements);
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$subCollection->addOptions($options);
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$collection->addCollection($subCollection);
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}
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/**
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* Loads an XML file.
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*
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* @param string $file An XML file path
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*
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* @return \DOMDocument
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*
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* @throws \InvalidArgumentException When loading of XML file fails because of syntax errors
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* or when the XML structure is not as expected by the scheme -
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* see validate()
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*/
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protected function loadFile($file)
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{
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return XmlUtils::loadFile($file, __DIR__.static::SCHEME_PATH);
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}
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/**
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* Parses the config elements (default, requirement, option).
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*
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* @param \DOMElement $node Element to parse that contains the configs
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* @param string $path Full path of the XML file being processed
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*
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* @return array An array with the defaults as first item, requirements as second and options as third
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*
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* @throws \InvalidArgumentException When the XML is invalid
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*/
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private function parseConfigs(\DOMElement $node, $path)
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{
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$defaults = array();
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$requirements = array();
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$options = array();
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$condition = null;
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foreach ($node->getElementsByTagNameNS(self::NAMESPACE_URI, '*') as $n) {
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switch ($n->localName) {
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case 'default':
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if ($this->isElementValueNull($n)) {
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$defaults[$n->getAttribute('key')] = null;
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} else {
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$defaults[$n->getAttribute('key')] = trim($n->textContent);
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}
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break;
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case 'requirement':
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$requirements[$n->getAttribute('key')] = trim($n->textContent);
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break;
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case 'option':
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$options[$n->getAttribute('key')] = trim($n->textContent);
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break;
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case 'condition':
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$condition = trim($n->textContent);
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break;
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default:
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throw new \InvalidArgumentException(sprintf('Unknown tag "%s" used in file "%s". Expected "default", "requirement" or "option".', $n->localName, $path));
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}
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}
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return array($defaults, $requirements, $options, $condition);
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}
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private function isElementValueNull(\DOMElement $element)
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{
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$namespaceUri = 'http://www.w3.org/2001/XMLSchema-instance';
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if (!$element->hasAttributeNS($namespaceUri, 'nil')) {
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return false;
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}
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return 'true' === $element->getAttributeNS($namespaceUri, 'nil') || '1' === $element->getAttributeNS($namespaceUri, 'nil');
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}
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}
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