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