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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\DependencyInjection\Loader;
use Symfony\Component\Config\Resource\FileResource;
use Symfony\Component\Config\Util\XmlUtils;
use Symfony\Component\DependencyInjection\DefinitionDecorator;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\DependencyInjection\Alias;
use Symfony\Component\DependencyInjection\Definition;
use Symfony\Component\DependencyInjection\Reference;
use Symfony\Component\DependencyInjection\SimpleXMLElement;
use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
use Symfony\Component\DependencyInjection\Exception\RuntimeException;
/**
* XmlFileLoader loads XML files service definitions.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class XmlFileLoader extends FileLoader
{
/**
* Loads an XML file.
*
* @param mixed $file The resource
* @param string $type The resource type
*/
public function load($file, $type = null)
{
$path = $this->locator->locate($file);
$xml = $this->parseFile($path);
$xml->registerXPathNamespace('container', 'http://symfony.com/schema/dic/services');
$this->container->addResource(new FileResource($path));
// anonymous services
$this->processAnonymousServices($xml, $path);
// imports
$this->parseImports($xml, $path);
// parameters
$this->parseParameters($xml, $path);
// extensions
$this->loadFromExtensions($xml);
// services
$this->parseDefinitions($xml, $path);
}
/**
* Returns true if this class supports the given resource.
*
* @param mixed $resource A resource
* @param string $type The resource type
*
* @return Boolean true if this class supports the given resource, false otherwise
*/
public function supports($resource, $type = null)
{
return is_string($resource) && 'xml' === pathinfo($resource, PATHINFO_EXTENSION);
}
/**
* Parses parameters
*
* @param SimpleXMLElement $xml
* @param string $file
*/
private function parseParameters(SimpleXMLElement $xml, $file)
{
if (!$xml->parameters) {
return;
}
$this->container->getParameterBag()->add($xml->parameters->getArgumentsAsPhp('parameter'));
}
/**
* Parses imports
*
* @param SimpleXMLElement $xml
* @param string $file
*/
private function parseImports(SimpleXMLElement $xml, $file)
{
if (false === $imports = $xml->xpath('//container:imports/container:import')) {
return;
}
foreach ($imports as $import) {
$this->setCurrentDir(dirname($file));
$this->import((string) $import['resource'], null, (Boolean) $import->getAttributeAsPhp('ignore-errors'), $file);
}
}
/**
* Parses multiple definitions
*
* @param SimpleXMLElement $xml
* @param string $file
*/
private function parseDefinitions(SimpleXMLElement $xml, $file)
{
if (false === $services = $xml->xpath('//container:services/container:service')) {
return;
}
foreach ($services as $service) {
$this->parseDefinition((string) $service['id'], $service, $file);
}
}
/**
* Parses an individual Definition
*
* @param string $id
* @param SimpleXMLElement $service
* @param string $file
*/
private function parseDefinition($id, $service, $file)
{
if ((string) $service['alias']) {
$public = true;
if (isset($service['public'])) {
$public = $service->getAttributeAsPhp('public');
}
$this->container->setAlias($id, new Alias((string) $service['alias'], $public));
return;
}
if (isset($service['parent'])) {
$definition = new DefinitionDecorator((string) $service['parent']);
} else {
$definition = new Definition();
}
foreach (array('class', 'scope', 'public', 'factory-class', 'factory-method', 'factory-service', 'synthetic', 'synchronized', 'lazy', 'abstract') as $key) {
if (isset($service[$key])) {
$method = 'set'.str_replace('-', '', $key);
$definition->$method((string) $service->getAttributeAsPhp($key));
}
}
if ($service->file) {
$definition->setFile((string) $service->file);
}
$definition->setArguments($service->getArgumentsAsPhp('argument'));
$definition->setProperties($service->getArgumentsAsPhp('property'));
if (isset($service->configurator)) {
if (isset($service->configurator['function'])) {
$definition->setConfigurator((string) $service->configurator['function']);
} else {
if (isset($service->configurator['service'])) {
$class = new Reference((string) $service->configurator['service'], ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE, false);
} else {
$class = (string) $service->configurator['class'];
}
$definition->setConfigurator(array($class, (string) $service->configurator['method']));
}
}
foreach ($service->call as $call) {
$definition->addMethodCall((string) $call['method'], $call->getArgumentsAsPhp('argument'));
}
foreach ($service->tag as $tag) {
$parameters = array();
foreach ($tag->attributes() as $name => $value) {
if ('name' === $name) {
continue;
}
if (false !== strpos($name, '-') && false === strpos($name, '_') && !array_key_exists($normalizedName = str_replace('-', '_', $name), $parameters)) {
$parameters[$normalizedName] = SimpleXMLElement::phpize($value);
}
// keep not normalized key for BC too
$parameters[$name] = SimpleXMLElement::phpize($value);
}
$definition->addTag((string) $tag['name'], $parameters);
}
$this->container->setDefinition($id, $definition);
}
/**
* Parses a XML file.
*
* @param string $file Path to a file
*
* @return SimpleXMLElement
*
* @throws InvalidArgumentException When loading of XML file returns error
*/
protected function parseFile($file)
{
try {
$dom = XmlUtils::loadFile($file, array($this, 'validateSchema'));
} catch (\InvalidArgumentException $e) {
throw new InvalidArgumentException(sprintf('Unable to parse file "%s".', $file), $e->getCode(), $e);
}
$this->validateExtensions($dom, $file);
return simplexml_import_dom($dom, 'Symfony\\Component\\DependencyInjection\\SimpleXMLElement');
}
/**
* Processes anonymous services
*
* @param SimpleXMLElement $xml
* @param string $file
*/
private function processAnonymousServices(SimpleXMLElement $xml, $file)
{
$definitions = array();
$count = 0;
// anonymous services as arguments/properties
if (false !== $nodes = $xml->xpath('//container:argument[@type="service"][not(@id)]|//container:property[@type="service"][not(@id)]')) {
foreach ($nodes as $node) {
// give it a unique name
$id = sprintf('%s_%d', hash('sha256', $file), ++$count);
$node['id'] = $id;
$definitions[$id] = array($node->service, $file, false);
$node->service['id'] = $id;
}
}
// anonymous services "in the wild"
if (false !== $nodes = $xml->xpath('//container:services/container:service[not(@id)]')) {
foreach ($nodes as $node) {
// give it a unique name
$id = sprintf('%s_%d', hash('sha256', $file), ++$count);
$node['id'] = $id;
$definitions[$id] = array($node, $file, true);
$node->service['id'] = $id;
}
}
// resolve definitions
krsort($definitions);
foreach ($definitions as $id => $def) {
// anonymous services are always private
$def[0]['public'] = false;
$this->parseDefinition($id, $def[0], $def[1]);
$oNode = dom_import_simplexml($def[0]);
if (true === $def[2]) {
$nNode = new \DOMElement('_services');
$oNode->parentNode->replaceChild($nNode, $oNode);
$nNode->setAttribute('id', $id);
} else {
$oNode->parentNode->removeChild($oNode);
}
}
}
/**
* Validates a documents XML schema.
*
* @param \DOMDocument $dom
*
* @return Boolean
*
* @throws RuntimeException When extension references a non-existent XSD file
*/
public function validateSchema(\DOMDocument $dom)
{
$schemaLocations = array('http://symfony.com/schema/dic/services' => str_replace('\\', '/', __DIR__.'/schema/dic/services/services-1.0.xsd'));
if ($element = $dom->documentElement->getAttributeNS('http://www.w3.org/2001/XMLSchema-instance', 'schemaLocation')) {
$items = preg_split('/\s+/', $element);
for ($i = 0, $nb = count($items); $i < $nb; $i += 2) {
if (!$this->container->hasExtension($items[$i])) {
continue;
}
if (($extension = $this->container->getExtension($items[$i])) && false !== $extension->getXsdValidationBasePath()) {
$path = str_replace($extension->getNamespace(), str_replace('\\', '/', $extension->getXsdValidationBasePath()).'/', $items[$i + 1]);
if (!is_file($path)) {
throw new RuntimeException(sprintf('Extension "%s" references a non-existent XSD file "%s"', get_class($extension), $path));
}
$schemaLocations[$items[$i]] = $path;
}
}
}
$tmpfiles = array();
$imports = '';
foreach ($schemaLocations as $namespace => $location) {
$parts = explode('/', $location);
if (0 === stripos($location, 'phar://')) {
$tmpfile = tempnam(sys_get_temp_dir(), 'sf2');
if ($tmpfile) {
copy($location, $tmpfile);
$tmpfiles[] = $tmpfile;
$parts = explode('/', str_replace('\\', '/', $tmpfile));
}
}
$drive = '\\' === DIRECTORY_SEPARATOR ? array_shift($parts).'/' : '';
$location = 'file:///'.$drive.implode('/', array_map('rawurlencode', $parts));
$imports .= sprintf(' <xsd:import namespace="%s" schemaLocation="%s" />'."\n", $namespace, $location);
}
$source = <<<EOF
<?xml version="1.0" encoding="utf-8" ?>
<xsd:schema xmlns="http://symfony.com/schema"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://symfony.com/schema"
elementFormDefault="qualified">
<xsd:import namespace="http://www.w3.org/XML/1998/namespace"/>
$imports
</xsd:schema>
EOF
;
$valid = @$dom->schemaValidateSource($source);
foreach ($tmpfiles as $tmpfile) {
@unlink($tmpfile);
}
return $valid;
}
/**
* Validates an extension.
*
* @param \DOMDocument $dom
* @param string $file
*
* @throws InvalidArgumentException When no extension is found corresponding to a tag
*/
private function validateExtensions(\DOMDocument $dom, $file)
{
foreach ($dom->documentElement->childNodes as $node) {
if (!$node instanceof \DOMElement || 'http://symfony.com/schema/dic/services' === $node->namespaceURI) {
continue;
}
// can it be handled by an extension?
if (!$this->container->hasExtension($node->namespaceURI)) {
$extensionNamespaces = array_filter(array_map(function ($ext) { return $ext->getNamespace(); }, $this->container->getExtensions()));
throw new InvalidArgumentException(sprintf(
'There is no extension able to load the configuration for "%s" (in %s). Looked for namespace "%s", found %s',
$node->tagName,
$file,
$node->namespaceURI,
$extensionNamespaces ? sprintf('"%s"', implode('", "', $extensionNamespaces)) : 'none'
));
}
}
}
/**
* Loads from an extension.
*
* @param SimpleXMLElement $xml
*/
private function loadFromExtensions(SimpleXMLElement $xml)
{
foreach (dom_import_simplexml($xml)->childNodes as $node) {
if (!$node instanceof \DOMElement || $node->namespaceURI === 'http://symfony.com/schema/dic/services') {
continue;
}
$values = static::convertDomElementToArray($node);
if (!is_array($values)) {
$values = array();
}
$this->container->loadFromExtension($node->namespaceURI, $values);
}
}
/**
* Converts a \DomElement object to a PHP array.
*
* The following rules applies during the conversion:
*
* * Each tag is converted to a key value or an array
* if there is more than one "value"
*
* * The content of a tag is set under a "value" key (<foo>bar</foo>)
* if the tag also has some nested tags
*
* * The attributes are converted to keys (<foo foo="bar"/>)
*
* * The nested-tags are converted to keys (<foo><foo>bar</foo></foo>)
*
* @param \DomElement $element A \DomElement instance
*
* @return array A PHP array
*/
public static function convertDomElementToArray(\DomElement $element)
{
return XmlUtils::convertDomElementToArray($element);
}
}