Issues in FOSHttpCacheExtension.php (master) - Issues in master - FriendsOfSymfony/FOSHttpCacheBundle - Measure and Improve Code Quality continuously with Scrutinizer

Issues (49)

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Cross-Site Scripting

Cross-Site Scripting enables an attacker to inject code into the response of a web-request that is viewed by other users. It can for example be used to bypass access controls, or even to take over other users' accounts.

File Exposure

File Exposure allows an attacker to gain access to local files that he should not be able to access. These files can for example include database credentials, or other configuration files.

File Manipulation

File Manipulation enables an attacker to write custom data to files. This potentially leads to injection of arbitrary code on the server.

Object Injection

Object Injection enables an attacker to inject an object into PHP code, and can lead to arbitrary code execution, file exposure, or file manipulation attacks.

Code Injection

Code Injection enables an attacker to execute arbitrary code on the server.

Response Splitting

Response Splitting can be used to send arbitrary responses.

File Inclusion

File Inclusion enables an attacker to inject custom files into PHP's file loading mechanism, either explicitly passed to include, or for example via PHP's auto-loading mechanism.

Command Injection

Command Injection enables an attacker to inject a shell command that is execute with the privileges of the web-server. This can be used to expose sensitive data, or gain access of your server.

SQL Injection

SQL Injection enables an attacker to execute arbitrary SQL code on your database server gaining access to user data, or manipulating user data.

XPath Injection

XPath Injection enables an attacker to modify the parts of XML document that are read. If that XML document is for example used for authentication, this can lead to further vulnerabilities similar to SQL Injection.

LDAP Injection

LDAP Injection enables an attacker to inject LDAP statements potentially granting permission to run unauthorized queries, or modify content inside the LDAP tree.

Header Injection

Other Vulnerability

This category comprises other attack vectors such as manipulating the PHP runtime, loading custom extensions, freezing the runtime, or similar.

Regex Injection

Regex Injection enables an attacker to execute arbitrary code in your PHP process.

XML Injection

XML Injection enables an attacker to read files on your local filesystem including configuration files, or can be abused to freeze your web-server process.

Variable Injection

Variable Injection enables an attacker to overwrite program variables with custom data, and can lead to further vulnerabilities.

Unfortunately, the security analysis is currently not available for your project. If you are a non-commercial open-source project, please contact support to gain access.

src/DependencyInjection/FOSHttpCacheExtension.php (1 issue)

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Bug 1

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Minor 1

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<?php

/*
 * This file is part of the FOSHttpCacheBundle package.
 *
 * (c) FriendsOfSymfony <http://friendsofsymfony.github.com/>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace FOS\HttpCacheBundle\DependencyInjection;

use FOS\HttpCache\ProxyClient\HttpDispatcher;
use FOS\HttpCache\ProxyClient\ProxyClient;
use FOS\HttpCache\SymfonyCache\KernelDispatcher;
use FOS\HttpCache\TagHeaderFormatter\MaxHeaderValueLengthFormatter;
use FOS\HttpCacheBundle\DependencyInjection\Compiler\HashGeneratorPass;
use FOS\HttpCacheBundle\Http\ResponseMatcher\ExpressionResponseMatcher;
use Symfony\Component\Config\Definition\Exception\InvalidConfigurationException;
use Symfony\Component\Config\FileLocator;
use Symfony\Component\Console\Application;
use Symfony\Component\DependencyInjection\ChildDefinition;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Definition;
use Symfony\Component\DependencyInjection\DefinitionDecorator;
use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
use Symfony\Component\DependencyInjection\Reference;
use Symfony\Component\HttpKernel\DependencyInjection\Extension;
use Symfony\Component\HttpKernel\Kernel;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;

/**
 * {@inheritdoc}
 */
class FOSHttpCacheExtension extends Extension
{
    /**
     * {@inheritdoc}
     */
    public function getConfiguration(array $config, ContainerBuilder $container)
    {
        return new Configuration($container->getParameter('kernel.debug'));
    }

    /**
     * {@inheritdoc}
     */
    public function load(array $configs, ContainerBuilder $container)
    {
        $configuration = $this->getConfiguration($configs, $container);
        $config = $this->processConfiguration($configuration, $configs);
/** @return stdClass|null */
function mayReturnNull() { }

function doesNotAcceptNull(stdClass $x) { }

// With potential error.
function withoutCheck() {
    $x = mayReturnNull();
    doesNotAcceptNull($x); // Potential error here.
}

// Safe - Alternative 1
function withCheck1() {
    $x = mayReturnNull();
    if ( ! $x instanceof stdClass) {
        throw new \LogicException('$x must be defined.');
    }
    doesNotAcceptNull($x);
}

// Safe - Alternative 2
function withCheck2() {
    $x = mayReturnNull();
    if ($x instanceof stdClass) {
        doesNotAcceptNull($x);
    }
}

        $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
        $loader->load('matcher.xml');

        if ($config['debug']['enabled'] || (!empty($config['cache_control']))) {
            $debugHeader = $config['debug']['enabled'] ? $config['debug']['header'] : false;
            $container->setParameter('fos_http_cache.debug_header', $debugHeader);
            $loader->load('cache_control_listener.xml');
        }

        $this->loadCacheable($container, $config['cacheable']);

        if (!empty($config['cache_control'])) {
            $this->loadCacheControl($container, $config['cache_control']);
        }

        if (isset($config['proxy_client'])) {
            $this->loadProxyClient($container, $loader, $config['proxy_client']);
        }

        if (isset($config['test'])) {
            $this->loadTest($container, $loader, $config['test']);
        }

        if ($config['cache_manager']['enabled']) {
            if (array_key_exists('custom_proxy_client', $config['cache_manager'])) {
                // overwrite the previously set alias, if a proxy client was also configured
                $container->setAlias(
                    'fos_http_cache.default_proxy_client',
                    $config['cache_manager']['custom_proxy_client']
                );
            }
            if ('auto' === $config['cache_manager']['generate_url_type']) {
                if (array_key_exists('custom_proxy_client', $config['cache_manager'])) {
                    $generateUrlType = UrlGeneratorInterface::ABSOLUTE_URL;
                } else {
                    $defaultClient = $this->getDefaultProxyClient($config['proxy_client']);
                    if ('noop' !== $defaultClient
                        && array_key_exists('base_url', $config['proxy_client'][$defaultClient])) {
                        $generateUrlType = UrlGeneratorInterface::ABSOLUTE_PATH;
                    } else {
                        $generateUrlType = UrlGeneratorInterface::ABSOLUTE_URL;
                    }
                }
            } else {
                $generateUrlType = $config['cache_manager']['generate_url_type'];
            }
            $container->setParameter('fos_http_cache.cache_manager.generate_url_type', $generateUrlType);
            $loader->load('cache_manager.xml');
            if (class_exists(Application::class)) {
                $loader->load('cache_manager_commands.xml');
            }
        }

        if ($config['tags']['enabled']) {
            $this->loadCacheTagging(
                $container,
                $loader,
                $config['tags'],
                array_key_exists('proxy_client', $config)
                    ? $this->getDefaultProxyClient($config['proxy_client'])
                    : 'custom'
            );
        } else {
            $container->setParameter('fos_http_cache.compiler_pass.tag_annotations', false);
        }

        if ($config['invalidation']['enabled']) {
            $loader->load('invalidation_listener.xml');

            if (!empty($config['invalidation']['expression_language'])) {
                $container->setAlias(
                    'fos_http_cache.invalidation.expression_language',
                    $config['invalidation']['expression_language']
                );
            }

            if (!empty($config['invalidation']['rules'])) {
                $this->loadInvalidatorRules($container, $config['invalidation']['rules']);
            }
        }

        if ($config['user_context']['enabled']) {
            $this->loadUserContext($container, $loader, $config['user_context']);
        }

        if (!empty($config['flash_message']) && $config['flash_message']['enabled']) {
            unset($config['flash_message']['enabled']);
            $container->setParameter('fos_http_cache.event_listener.flash_message.options', $config['flash_message']);

            $loader->load('flash_message.xml');
        }

        if (\PHP_VERSION_ID >= 80000) {
            $loader->load('php8_attributes.xml');
        }
    }

    private function loadCacheable(ContainerBuilder $container, array $config)
    {
        $definition = $container->getDefinition('fos_http_cache.response_matcher.cacheable');

        // Change CacheableResponseMatcher to ExpressionResponseMatcher
        if ($config['response']['expression']) {
            $definition->setClass(ExpressionResponseMatcher::class)
                ->setArguments([$config['response']['expression']]);
        } else {
            $container->setParameter(
                'fos_http_cache.cacheable.response.additional_status',
                $config['response']['additional_status']
            );
        }
    }

    /**
     * @throws InvalidConfigurationException
     */
    private function loadCacheControl(ContainerBuilder $container, array $config)
    {
        $controlDefinition = $container->getDefinition('fos_http_cache.event_listener.cache_control');

        foreach ($config['rules'] as $rule) {
            $ruleMatcher = $this->parseRuleMatcher($container, $rule['match']);

            if ('default' === $rule['headers']['overwrite']) {
                $rule['headers']['overwrite'] = $config['defaults']['overwrite'];
            }

            $controlDefinition->addMethodCall('addRule', [$ruleMatcher, $rule['headers']]);
        }
    }

    /**
     * Parse one cache control rule match configuration.
     *
     * @param array $match Request and response match criteria
     *
     * @return Reference pointing to a rule matcher service
     */
    private function parseRuleMatcher(ContainerBuilder $container, array $match)
    {
        $requestMatcher = $this->parseRequestMatcher($container, $match);
        $responseMatcher = $this->parseResponseMatcher($container, $match);

        $signature = serialize([(string) $requestMatcher, (string) $responseMatcher]);
        $id = 'fos_http_cache.cache_control.rule_matcher.'.md5($signature);

        if ($container->hasDefinition($id)) {
            throw new InvalidConfigurationException('Duplicate match criteria. Would be hidden by a previous rule. match: '.json_encode($match));
        }

        $container
            ->setDefinition($id, $this->createChildDefinition('fos_http_cache.rule_matcher'))
            ->replaceArgument(0, $requestMatcher)
            ->replaceArgument(1, $responseMatcher)
        ;

        return new Reference($id);
    }

    /**
     * Used for cache control, tag and invalidation rules.
     *
     * @return Reference to the request matcher
     */
    private function parseRequestMatcher(ContainerBuilder $container, array $match)
    {
        $match['ips'] = (empty($match['ips'])) ? null : $match['ips'];

        $arguments = [
            $match['path'],
            $match['host'],
            $match['methods'],
            $match['ips'],
            $match['attributes'],
        ];
        $serialized = serialize($arguments);
        $id = 'fos_http_cache.request_matcher.'.md5($serialized).sha1($serialized);

        if (!$container->hasDefinition($id)) {
            $container
                ->setDefinition($id, $this->createChildDefinition('fos_http_cache.request_matcher'))
                ->setArguments($arguments)
            ;

            if (!empty($match['query_string'])) {
                $container->getDefinition($id)->addMethodCall('setQueryString', [$match['query_string']]);
            }
        }

        return new Reference($id);
    }

    /**
     * Used only for cache control rules.
     *
     * @return Reference to the correct response matcher service
     */
    private function parseResponseMatcher(ContainerBuilder $container, array $config)
    {
        if (!empty($config['additional_response_status'])) {
            $id = 'fos_http_cache.cache_control.expression.'.md5(serialize($config['additional_response_status']));
            if (!$container->hasDefinition($id)) {
                $container
                    ->setDefinition($id, $this->createChildDefinition('fos_http_cache.response_matcher.cache_control.cacheable_response'))
                    ->setArguments([$config['additional_response_status']])
                ;
            }
        } elseif (!empty($config['match_response'])) {
            $id = 'fos_http_cache.cache_control.match_response.'.md5($config['match_response']);
            if (!$container->hasDefinition($id)) {
                $container
                    ->setDefinition($id, $this->createChildDefinition('fos_http_cache.response_matcher.cache_control.expression'))
                    ->replaceArgument(0, $config['match_response'])
                ;
            }
        } else {
            $id = 'fos_http_cache.response_matcher.cacheable';
        }

        return new Reference($id);
    }

    private function loadUserContext(ContainerBuilder $container, XmlFileLoader $loader, array $config)
    {
        $configuredUserIdentifierHeaders = array_map('strtolower', $config['user_identifier_headers']);
        $completeUserIdentifierHeaders = $configuredUserIdentifierHeaders;
        if (false !== $config['session_name_prefix'] && !in_array('cookie', $completeUserIdentifierHeaders)) {
            $completeUserIdentifierHeaders[] = 'cookie';
        }

        $loader->load('user_context.xml');

        $container->getDefinition('fos_http_cache.user_context.request_matcher')
            ->replaceArgument(0, $config['match']['accept'])
            ->replaceArgument(1, $config['match']['method']);

        $container->setParameter('fos_http_cache.event_listener.user_context.options', [
            'user_identifier_headers' => $completeUserIdentifierHeaders,
            'user_hash_header' => $config['user_hash_header'],
            'ttl' => $config['hash_cache_ttl'],
            'add_vary_on_hash' => $config['always_vary_on_context_hash'],
        ]);

        $container->getDefinition('fos_http_cache.event_listener.user_context')
            ->replaceArgument(0, new Reference($config['match']['matcher_service']))
        ;

        $options = [
            'user_identifier_headers' => $configuredUserIdentifierHeaders,
            'session_name_prefix' => $config['session_name_prefix'],
        ];
        $container->getDefinition('fos_http_cache.user_context.anonymous_request_matcher')
            ->replaceArgument(0, $options);

        if ($config['logout_handler']['enabled']) {
            $container->setAlias('security.logout.handler.session', 'fos_http_cache.user_context.session_logout_handler');
        } else {
            $container->removeDefinition('fos_http_cache.user_context.logout_handler');
            $container->removeDefinition('fos_http_cache.user_context.session_logout_handler');
            $container->removeDefinition('fos_http_cache.user_context_invalidator');
        }

        if ($config['role_provider']) {
            $container->getDefinition('fos_http_cache.user_context.role_provider')
                ->addTag(HashGeneratorPass::TAG_NAME)
                ->setAbstract(false);
        }

        // Only decorate default SessionListener for Symfony 3.4 - 4.0
        // For Symfony 4.1+, the UserContextListener sets the header that tells
        // the SessionListener to leave the cache-control header unchanged.
        if (version_compare(Kernel::VERSION, '3.4', '>=')
            && version_compare(Kernel::VERSION, '4.1', '<')
        ) {
            $container->getDefinition('fos_http_cache.user_context.session_listener')
                ->setArgument(1, strtolower($config['user_hash_header']))
                ->setArgument(2, $completeUserIdentifierHeaders);
        } else {
            $container->removeDefinition('fos_http_cache.user_context.session_listener');
        }
    }

    private function loadProxyClient(ContainerBuilder $container, XmlFileLoader $loader, array $config)
    {
        if (isset($config['varnish'])) {
            $this->loadVarnish($container, $loader, $config['varnish']);
        }
        if (isset($config['nginx'])) {
            $this->loadNginx($container, $loader, $config['nginx']);
        }
        if (isset($config['symfony'])) {
            $this->loadSymfony($container, $loader, $config['symfony']);
        }
        if (isset($config['noop'])) {
            $loader->load('noop.xml');
        }

        $container->setAlias(
            'fos_http_cache.default_proxy_client',
            'fos_http_cache.proxy_client.'.$this->getDefaultProxyClient($config)
        );
        $container->setAlias(
            ProxyClient::class,
            'fos_http_cache.default_proxy_client'
        );
    }

    /**
     * Define the http dispatcher service for the proxy client $name.
     *
     * @param string $serviceName
     */
    private function createHttpDispatcherDefinition(ContainerBuilder $container, array $config, $serviceName)
    {
        foreach ($config['servers'] as $url) {
            $usedEnvs = [];
            $container->resolveEnvPlaceholders($url, null, $usedEnvs);
            if (0 === \count($usedEnvs)) {
                $this->validateUrl($url, 'Not a valid Varnish server address: "%s"');
            }
        }
        if (!empty($config['base_url'])) {
            $baseUrl = $config['base_url'];
            $usedEnvs = [];
            $container->resolveEnvPlaceholders($baseUrl, null, $usedEnvs);
            if (0 === \count($usedEnvs)) {
                $baseUrl = $this->prefixSchema($baseUrl);
                $this->validateUrl($baseUrl, 'Not a valid base path: "%s"');
            }
        } else {
            $baseUrl = null;
        }
        $httpClient = null;
        if ($config['http_client']) {
            $httpClient = new Reference($config['http_client']);
        }

        $definition = new Definition(HttpDispatcher::class, [
            $config['servers'],
            $baseUrl,
            $httpClient,
        ]);

        $container->setDefinition($serviceName, $definition);
    }

    private function loadVarnish(ContainerBuilder $container, XmlFileLoader $loader, array $config)
    {
        $this->createHttpDispatcherDefinition($container, $config['http'], 'fos_http_cache.proxy_client.varnish.http_dispatcher');
        $options = [
            'tag_mode' => $config['tag_mode'],
            'tags_header' => $config['tags_header'],
        ];

        if (!empty($config['header_length'])) {
            $options['header_length'] = $config['header_length'];
        }
        if (!empty($config['default_ban_headers'])) {
            $options['default_ban_headers'] = $config['default_ban_headers'];
        }
        $container->setParameter('fos_http_cache.proxy_client.varnish.options', $options);

        $loader->load('varnish.xml');
    }

    private function loadNginx(ContainerBuilder $container, XmlFileLoader $loader, array $config)
    {
        $this->createHttpDispatcherDefinition($container, $config['http'], 'fos_http_cache.proxy_client.nginx.http_dispatcher');
        $container->setParameter('fos_http_cache.proxy_client.nginx.options', [
            'purge_location' => $config['purge_location'],
        ]);
        $loader->load('nginx.xml');
    }

    private function loadSymfony(ContainerBuilder $container, XmlFileLoader $loader, array $config)
    {
        $serviceName = 'fos_http_cache.proxy_client.symfony.http_dispatcher';

        if ($config['use_kernel_dispatcher']) {
            $definition = new Definition(KernelDispatcher::class, [
                new Reference('kernel'),
            ]);
            $container->setDefinition($serviceName, $definition);
        } else {
            $this->createHttpDispatcherDefinition($container, $config['http'], $serviceName);
        }

        $options = [
            'tags_header' => $config['tags_header'],
            'tags_method' => $config['tags_method'],
            'purge_method' => $config['purge_method'],
        ];
        if (!empty($config['header_length'])) {
            $options['header_length'] = $config['header_length'];
        }
        $container->setParameter('fos_http_cache.proxy_client.symfony.options', $options);

        $loader->load('symfony.xml');
    }

    /**
     * @param array  $config Configuration section for the tags node
     * @param string $client Name of the client used with the cache manager,
     *                       "custom" when a custom client is used
     */
    private function loadCacheTagging(ContainerBuilder $container, XmlFileLoader $loader, array $config, $client)
    {
        if ('auto' === $config['enabled'] && !in_array($client, ['varnish', 'symfony'])) {
            $container->setParameter('fos_http_cache.compiler_pass.tag_annotations', false);

            return;
        }
        if (!in_array($client, ['varnish', 'symfony', 'custom', 'noop'])) {
            throw new InvalidConfigurationException(sprintf('You can not enable cache tagging with the %s client', $client));
        }

        $container->setParameter('fos_http_cache.compiler_pass.tag_annotations', $config['annotations']['enabled']);
        $container->setParameter('fos_http_cache.tag_handler.response_header', $config['response_header']);
        $container->setParameter('fos_http_cache.tag_handler.separator', $config['separator']);
        $container->setParameter('fos_http_cache.tag_handler.strict', $config['strict']);

        $loader->load('cache_tagging.xml');
        if (class_exists(Application::class)) {
            $loader->load('cache_tagging_commands.xml');
        }

        if (!empty($config['expression_language'])) {
            $container->setAlias(
                'fos_http_cache.tag_handler.expression_language',
                $config['expression_language']
            );
        }

        if (!empty($config['rules'])) {
            $this->loadTagRules($container, $config['rules']);
        }

        if (null !== $config['max_header_value_length']) {
            $container->register('fos_http_cache.tag_handler.max_header_value_length_header_formatter', MaxHeaderValueLengthFormatter::class)
                ->setDecoratedService('fos_http_cache.tag_handler.header_formatter')
                ->addArgument(new Reference('fos_http_cache.tag_handler.max_header_value_length_header_formatter.inner'))
                ->addArgument((int) $config['max_header_value_length']);
        }
    }

    private function loadTest(ContainerBuilder $container, XmlFileLoader $loader, array $config)
    {
        $container->setParameter('fos_http_cache.test.cache_header', $config['cache_header']);

        if ($config['proxy_server']) {
            $this->loadProxyServer($container, $loader, $config['proxy_server']);
        }
    }

    private function loadProxyServer(ContainerBuilder $container, XmlFileLoader $loader, array $config)
    {
        if (isset($config['varnish'])) {
            $this->loadVarnishProxyServer($container, $loader, $config['varnish']);
        }

        if (isset($config['nginx'])) {
            $this->loadNginxProxyServer($container, $loader, $config['nginx']);
        }

        $container->setAlias(
            'fos_http_cache.test.default_proxy_server',
            'fos_http_cache.test.proxy_server.'.$this->getDefaultProxyClient($config)
        );
    }

    private function loadVarnishProxyServer(ContainerBuilder $container, XmlFileLoader $loader, $config)
    {
        $loader->load('varnish_proxy.xml');
        foreach ($config as $key => $value) {
            $container->setParameter(
                'fos_http_cache.test.proxy_server.varnish.'.$key,
                $value
            );
        }
    }

    private function loadNginxProxyServer(ContainerBuilder $container, XmlFileLoader $loader, $config)
    {
        $loader->load('nginx_proxy.xml');
        foreach ($config as $key => $value) {
            $container->setParameter(
                'fos_http_cache.test.proxy_server.nginx.'.$key,
                $value
            );
        }
    }

    private function loadTagRules(ContainerBuilder $container, array $config)
    {
        $tagDefinition = $container->getDefinition('fos_http_cache.event_listener.tag');

        foreach ($config as $rule) {
            $ruleMatcher = $this->parseRequestMatcher($container, $rule['match']);

            $tags = [
                'tags' => $rule['tags'],
                'expressions' => $rule['tag_expressions'],
            ];

            $tagDefinition->addMethodCall('addRule', [$ruleMatcher, $tags]);
        }
    }

    private function loadInvalidatorRules(ContainerBuilder $container, array $config)
    {
        $tagDefinition = $container->getDefinition('fos_http_cache.event_listener.invalidation');

        foreach ($config as $rule) {
            $ruleMatcher = $this->parseRequestMatcher($container, $rule['match']);
            $tagDefinition->addMethodCall('addRule', [$ruleMatcher, $rule['routes']]);
        }
    }

    private function validateUrl($url, $msg)
    {
        $prefixed = $this->prefixSchema($url);

        if (!$parts = parse_url($prefixed)) {
            throw new InvalidConfigurationException(sprintf($msg, $url));
        }
    }

    private function prefixSchema($url)
    {
        if (false === strpos($url, '://')) {
            $url = sprintf('%s://%s', 'http', $url);
        }

        return $url;
    }

    private function getDefaultProxyClient(array $config)
    {
        if (isset($config['default'])) {
            return $config['default'];
        }

        if (isset($config['varnish'])) {
            return 'varnish';
        }

        if (isset($config['nginx'])) {
            return 'nginx';
        }

        if (isset($config['symfony'])) {
            return 'symfony';
        }

        if (isset($config['noop'])) {
            return 'noop';
        }

        throw new InvalidConfigurationException('No proxy client configured');
    }

    /**
     * Build the child definition with fallback for Symfony versions < 3.3.
     *
     * @param string $id Id of the service to extend
     *
     * @return ChildDefinition|DefinitionDecorator
     */
    private function createChildDefinition($id)
    {
        if (class_exists(ChildDefinition::class)) {
            return new ChildDefinition($id);
        }

        return new DefinitionDecorator($id);
    }
}


FriendsOfSymfony / FOSHttpCacheBundle

Issues (49)

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src/DependencyInjection/FOSHttpCacheExtension.php (1 issue)

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