FriendsOfSymfony /
FOSHttpCacheBundle
Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like FOSHttpCacheExtension often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use FOSHttpCacheExtension, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 27 | class FOSHttpCacheExtension extends Extension |
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| 28 | { |
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| 29 | /** |
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| 30 | * {@inheritdoc} |
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| 31 | */ |
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| 32 | 22 | public function getConfiguration(array $config, ContainerBuilder $container) |
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| 36 | |||
| 37 | /** |
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| 38 | * {@inheritdoc} |
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| 39 | */ |
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| 40 | 22 | public function load(array $configs, ContainerBuilder $container) |
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| 41 | { |
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| 42 | 22 | $configuration = $this->getConfiguration($configs, $container); |
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| 43 | 22 | $config = $this->processConfiguration($configuration, $configs); |
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| 44 | |||
| 45 | 22 | $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config')); |
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| 46 | 22 | $loader->load('matcher.xml'); |
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| 47 | |||
| 48 | 22 | if ($config['debug']['enabled'] || (!empty($config['cache_control']))) { |
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| 49 | 3 | $debugHeader = $config['debug']['enabled'] ? $config['debug']['header'] : false; |
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| 50 | 3 | $container->setParameter($this->getAlias().'.debug_header', $debugHeader); |
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| 51 | 3 | $loader->load('cache_control_listener.xml'); |
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| 52 | } |
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| 53 | |||
| 54 | 22 | if (!empty($config['cache_control'])) { |
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| 55 | 3 | $this->loadCacheControl($container, $config['cache_control']); |
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| 56 | } |
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| 57 | |||
| 58 | 22 | if (isset($config['proxy_client'])) { |
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| 59 | 16 | $this->loadProxyClient($container, $loader, $config['proxy_client']); |
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| 60 | } |
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| 61 | |||
| 62 | 21 | if (isset($config['test'])) { |
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| 63 | 1 | $this->loadTest($container, $loader, $config['test']); |
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| 64 | } |
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| 65 | |||
| 66 | 21 | if ($config['cache_manager']['enabled']) { |
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| 67 | 16 | if (array_key_exists('custom_proxy_client', $config['cache_manager'])) { |
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| 68 | // overwrite the previously set alias, if a proxy client was also configured |
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| 69 | 1 | $container->setAlias( |
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| 70 | 1 | $this->getAlias().'.default_proxy_client', |
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| 71 | 1 | $config['cache_manager']['custom_proxy_client'] |
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| 72 | ); |
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| 73 | } |
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| 74 | 16 | if ('auto' === $config['cache_manager']['generate_url_type']) { |
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| 75 | 16 | if (array_key_exists('custom_proxy_client', $config['cache_manager'])) { |
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| 76 | 1 | $generateUrlType = UrlGeneratorInterface::ABSOLUTE_URL; |
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| 77 | } else { |
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| 78 | 15 | $defaultClient = $this->getDefaultProxyClient($config['proxy_client']); |
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| 79 | 15 | $generateUrlType = array_key_exists('base_url', $config['proxy_client'][$defaultClient]) |
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| 80 | 15 | ? UrlGeneratorInterface::ABSOLUTE_PATH |
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| 81 | 16 | : UrlGeneratorInterface::ABSOLUTE_URL |
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| 82 | ; |
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| 83 | } |
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| 84 | } else { |
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| 85 | $generateUrlType = $config['cache_manager']['generate_url_type']; |
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| 86 | } |
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| 87 | 16 | $container->setParameter($this->getAlias().'.cache_manager.generate_url_type', $generateUrlType); |
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| 88 | 16 | $loader->load('cache_manager.xml'); |
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| 89 | } |
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| 90 | |||
| 91 | 21 | if ($config['tags']['enabled']) { |
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| 92 | 16 | $this->loadCacheTagging( |
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| 93 | $container, |
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| 94 | $loader, |
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| 95 | 16 | $config['tags'], |
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| 96 | 16 | array_key_exists('proxy_client', $config) |
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| 97 | 15 | ? $this->getDefaultProxyClient($config['proxy_client']) |
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| 98 | 16 | : 'custom' |
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| 99 | ); |
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| 100 | } else { |
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| 101 | 5 | $container->setParameter($this->getAlias().'.compiler_pass.tag_annotations', false); |
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| 102 | } |
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| 103 | |||
| 104 | 20 | if ($config['invalidation']['enabled']) { |
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| 105 | 15 | $loader->load('invalidation_listener.xml'); |
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| 106 | |||
| 107 | 15 | if (!empty($config['invalidation']['expression_language'])) { |
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| 108 | $container->setAlias( |
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| 109 | $this->getAlias().'.invalidation.expression_language', |
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| 110 | $config['invalidation']['expression_language'] |
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| 111 | ); |
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| 112 | } |
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| 113 | |||
| 114 | 15 | if (!empty($config['invalidation']['rules'])) { |
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| 115 | 2 | $this->loadInvalidatorRules($container, $config['invalidation']['rules']); |
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| 116 | } |
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| 117 | } |
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| 118 | |||
| 119 | 20 | if ($config['user_context']['enabled']) { |
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| 120 | 4 | $this->loadUserContext($container, $loader, $config['user_context']); |
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| 121 | } |
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| 122 | |||
| 123 | 20 | if (!empty($config['flash_message']) && $config['flash_message']['enabled']) { |
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| 124 | 1 | $container->setParameter($this->getAlias().'.event_listener.flash_message.options', $config['flash_message']); |
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| 125 | |||
| 126 | 1 | $loader->load('flash_message.xml'); |
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| 127 | } |
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| 128 | 20 | } |
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| 129 | |||
| 130 | /** |
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| 131 | * @param ContainerBuilder $container |
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| 132 | * @param array $config |
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| 133 | * |
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| 134 | * @throws InvalidConfigurationException |
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| 135 | */ |
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| 136 | 3 | private function loadCacheControl(ContainerBuilder $container, array $config) |
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| 137 | { |
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| 138 | 3 | $controlDefinition = $container->getDefinition($this->getAlias().'.event_listener.cache_control'); |
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| 139 | |||
| 140 | 3 | foreach ($config['rules'] as $rule) { |
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| 141 | 3 | $ruleMatcher = $this->parseRuleMatcher($container, $rule['match']); |
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| 142 | |||
| 143 | 3 | if ('default' === $rule['headers']['overwrite']) { |
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| 144 | 3 | $rule['headers']['overwrite'] = $config['defaults']['overwrite']; |
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| 145 | } |
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| 146 | |||
| 147 | 3 | $controlDefinition->addMethodCall('addRule', array($ruleMatcher, $rule['headers'])); |
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| 148 | } |
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| 149 | 3 | } |
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| 150 | |||
| 151 | 5 | private function parseRuleMatcher(ContainerBuilder $container, array $match) |
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| 152 | { |
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| 153 | 5 | $match['ips'] = (empty($match['ips'])) ? null : $match['ips']; |
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| 154 | |||
| 155 | 5 | $requestMatcher = $this->createRequestMatcher( |
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| 156 | $container, |
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| 157 | 5 | $match['path'], |
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| 158 | 5 | $match['host'], |
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| 159 | 5 | $match['methods'], |
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| 160 | 5 | $match['ips'], |
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| 161 | 5 | $match['attributes'] |
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| 162 | ); |
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| 163 | |||
| 164 | 5 | $extraCriteria = array(); |
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| 165 | 5 | foreach (array('additional_cacheable_status', 'match_response') as $extra) { |
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| 166 | 5 | if (isset($match[$extra])) { |
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| 167 | 5 | $extraCriteria[$extra] = $match[$extra]; |
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| 168 | } |
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| 169 | } |
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| 170 | |||
| 171 | 5 | return $this->createRuleMatcher( |
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| 172 | $container, |
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| 173 | $requestMatcher, |
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| 174 | $extraCriteria |
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| 175 | ); |
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| 176 | } |
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| 177 | |||
| 178 | 5 | private function createRuleMatcher(ContainerBuilder $container, Reference $requestMatcher, array $extraCriteria) |
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| 194 | |||
| 195 | 4 | private function loadUserContext(ContainerBuilder $container, XmlFileLoader $loader, array $config) |
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| 196 | { |
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| 197 | 4 | $loader->load('user_context.xml'); |
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| 198 | |||
| 199 | 4 | $container->getDefinition($this->getAlias().'.user_context.request_matcher') |
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| 200 | 4 | ->replaceArgument(0, $config['match']['accept']) |
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| 201 | 4 | ->replaceArgument(1, $config['match']['method']); |
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| 202 | |||
| 203 | 4 | $container->getDefinition($this->getAlias().'.event_listener.user_context') |
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| 204 | 4 | ->replaceArgument(0, new Reference($config['match']['matcher_service'])) |
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| 205 | 4 | ->replaceArgument(2, $config['user_identifier_headers']) |
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| 206 | 4 | ->replaceArgument(3, $config['user_hash_header']) |
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| 207 | 4 | ->replaceArgument(4, $config['hash_cache_ttl']) |
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| 208 | 4 | ->replaceArgument(5, $config['always_vary_on_context_hash']); |
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| 209 | |||
| 210 | 4 | $container->getDefinition($this->getAlias().'.user_context.anonymous_request_matcher') |
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| 211 | 4 | ->replaceArgument(0, $config['user_identifier_headers']); |
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| 212 | |||
| 213 | 4 | if ($config['logout_handler']['enabled']) { |
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| 214 | 4 | $container->getDefinition($this->getAlias().'.user_context.logout_handler') |
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| 215 | 4 | ->replaceArgument(1, $config['user_identifier_headers']) |
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| 216 | 4 | ->replaceArgument(2, $config['match']['accept']); |
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| 217 | } else { |
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| 218 | $container->removeDefinition($this->getAlias().'.user_context.logout_handler'); |
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| 219 | } |
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| 220 | |||
| 221 | 4 | if ($config['role_provider']) { |
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| 222 | 2 | $container->getDefinition($this->getAlias().'.user_context.role_provider') |
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| 223 | 2 | ->addTag(HashGeneratorPass::TAG_NAME) |
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| 224 | 2 | ->setAbstract(false); |
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| 225 | } |
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| 226 | 4 | } |
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| 227 | |||
| 228 | 5 | private function createRequestMatcher(ContainerBuilder $container, $path = null, $host = null, $methods = null, $ips = null, array $attributes = array()) |
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| 229 | { |
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| 230 | 5 | $arguments = array($path, $host, $methods, $ips, $attributes); |
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| 231 | 5 | $serialized = serialize($arguments); |
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| 232 | 5 | $id = $this->getAlias().'.request_matcher.'.md5($serialized).sha1($serialized); |
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| 233 | |||
| 234 | 5 | View Code Duplication | if (!$container->hasDefinition($id)) { |
| 235 | $container |
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| 236 | 5 | ->setDefinition($id, new DefinitionDecorator($this->getAlias().'.request_matcher')) |
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| 237 | 5 | ->setArguments($arguments) |
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| 238 | ; |
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| 239 | } |
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| 240 | |||
| 241 | 5 | return new Reference($id); |
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| 242 | } |
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| 243 | |||
| 244 | 16 | private function loadProxyClient(ContainerBuilder $container, XmlFileLoader $loader, array $config) |
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| 245 | { |
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| 246 | 16 | if (isset($config['varnish'])) { |
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| 247 | 13 | $this->loadVarnish($container, $loader, $config['varnish']); |
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| 248 | } |
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| 249 | 15 | if (isset($config['nginx'])) { |
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| 250 | 2 | $this->loadNginx($container, $loader, $config['nginx']); |
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| 251 | } |
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| 252 | 15 | if (isset($config['symfony'])) { |
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| 253 | 1 | $this->loadSymfony($container, $loader, $config['symfony']); |
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| 254 | } |
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| 255 | |||
| 256 | 15 | $container->setAlias( |
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| 257 | 15 | $this->getAlias().'.default_proxy_client', |
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| 258 | 15 | $this->getAlias().'.proxy_client.'.$this->getDefaultProxyClient($config) |
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| 259 | ); |
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| 260 | 15 | } |
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| 261 | |||
| 262 | 13 | View Code Duplication | private function loadVarnish(ContainerBuilder $container, XmlFileLoader $loader, array $config) |
| 263 | { |
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| 264 | 13 | $loader->load('varnish.xml'); |
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| 265 | 13 | foreach ($config['servers'] as $url) { |
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| 266 | 13 | $this->validateUrl($url, 'Not a valid Varnish server address: "%s"'); |
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| 267 | } |
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| 268 | 13 | if (!empty($config['base_url'])) { |
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| 269 | 13 | $baseUrl = $this->prefixSchema($config['base_url'], 'Not a valid base path: "%s"'); |
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| 270 | 13 | $this->validateUrl($baseUrl, 'Not a valid base path: "%s"'); |
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| 271 | } else { |
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| 272 | $baseUrl = null; |
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| 273 | } |
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| 274 | 12 | $container->setParameter($this->getAlias().'.proxy_client.varnish.servers', $config['servers']); |
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| 275 | 12 | $container->setParameter($this->getAlias().'.proxy_client.varnish.base_url', $baseUrl); |
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| 276 | |||
| 277 | 12 | if (!empty($config['guzzle_client'])) { |
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| 278 | 1 | $container->setAlias( |
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| 279 | 1 | $this->getAlias().'.proxy_client.varnish.guzzle_client', |
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| 280 | 1 | $config['guzzle_client'] |
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| 281 | ); |
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| 282 | } |
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| 283 | 12 | } |
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| 284 | |||
| 285 | 2 | View Code Duplication | private function loadNginx(ContainerBuilder $container, XmlFileLoader $loader, array $config) |
| 286 | { |
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| 287 | 2 | $loader->load('nginx.xml'); |
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| 288 | 2 | foreach ($config['servers'] as $url) { |
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| 289 | 2 | $this->validateUrl($url, 'Not a valid Nginx server address: "%s"'); |
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| 290 | } |
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| 291 | 2 | if (!empty($config['base_url'])) { |
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| 292 | 2 | $baseUrl = $this->prefixSchema($config['base_url'], 'Not a valid base path: "%s"'); |
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| 293 | } else { |
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| 294 | $baseUrl = null; |
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| 295 | } |
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| 296 | 2 | $container->setParameter($this->getAlias().'.proxy_client.nginx.servers', $config['servers']); |
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| 297 | 2 | $container->setParameter($this->getAlias().'.proxy_client.nginx.base_url', $baseUrl); |
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| 298 | 2 | $container->setParameter($this->getAlias().'.proxy_client.nginx.purge_location', $config['purge_location']); |
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| 299 | |||
| 300 | 2 | if (!empty($config['guzzle_client'])) { |
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| 301 | $container->setAlias( |
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| 302 | $this->getAlias().'.proxy_client.nginx.guzzle_client', |
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| 303 | $config['guzzle_client'] |
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| 304 | ); |
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| 305 | } |
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| 306 | 2 | } |
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| 307 | |||
| 308 | 1 | View Code Duplication | private function loadSymfony(ContainerBuilder $container, XmlFileLoader $loader, array $config) |
| 309 | { |
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| 310 | 1 | $loader->load('symfony.xml'); |
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| 311 | 1 | foreach ($config['servers'] as $url) { |
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| 312 | 1 | $this->validateUrl($url, 'Not a valid web server address: "%s"'); |
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| 313 | } |
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| 314 | 1 | if (!empty($config['base_url'])) { |
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| 315 | 1 | $baseUrl = $this->prefixSchema($config['base_url'], 'Not a valid base path: "%s"'); |
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| 316 | 1 | $this->validateUrl($baseUrl, 'Not a valid base path: "%s"'); |
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| 317 | } else { |
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| 318 | $baseUrl = null; |
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| 319 | } |
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| 320 | 1 | $container->setParameter($this->getAlias().'.proxy_client.symfony.servers', $config['servers']); |
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| 321 | 1 | $container->setParameter($this->getAlias().'.proxy_client.symfony.base_url', $baseUrl); |
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| 322 | |||
| 323 | 1 | if (!empty($config['guzzle_client'])) { |
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| 324 | $container->setAlias( |
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| 325 | $this->getAlias().'.proxy_client.symfony.guzzle_client', |
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| 326 | $config['guzzle_client'] |
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| 327 | ); |
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| 328 | } |
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| 329 | 1 | } |
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| 330 | |||
| 331 | /** |
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| 332 | * @param ContainerBuilder $container |
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| 333 | * @param XmlFileLoader $loader |
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| 334 | * @param array $config Configuration section for the tags node |
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| 335 | * @param string $client Name of the client used with the cache manager, |
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| 336 | * "custom" when a custom client is used |
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| 337 | */ |
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| 338 | 16 | private function loadCacheTagging(ContainerBuilder $container, XmlFileLoader $loader, array $config, $client) |
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| 339 | { |
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| 340 | 16 | if ('auto' === $config['enabled'] && 'varnish' !== $client) { |
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| 341 | 3 | $container->setParameter($this->getAlias().'.compiler_pass.tag_annotations', false); |
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| 342 | |||
| 343 | 3 | return; |
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| 344 | } |
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| 345 | 13 | if (!in_array($client, array('varnish', 'custom'))) { |
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| 346 | 1 | throw new InvalidConfigurationException(sprintf('You can not enable cache tagging with %s', $client)); |
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| 347 | } |
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| 348 | |||
| 349 | 12 | $container->setParameter($this->getAlias().'.compiler_pass.tag_annotations', true); |
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| 350 | 12 | $container->setParameter($this->getAlias().'.tag_handler.header', $config['header']); |
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| 351 | 12 | $loader->load('cache_tagging.xml'); |
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| 352 | |||
| 353 | 12 | if (!empty($config['expression_language'])) { |
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| 354 | $container->setAlias( |
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| 355 | $this->getAlias().'.tag_handler.expression_language', |
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| 356 | $config['expression_language'] |
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| 357 | ); |
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| 358 | } |
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| 359 | |||
| 360 | 12 | if (!empty($config['rules'])) { |
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| 361 | 2 | $this->loadTagRules($container, $config['rules']); |
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| 362 | } |
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| 363 | |||
| 364 | 12 | $tagsHeader = $config['header']; |
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| 365 | 12 | $container->getDefinition($this->getAlias().'.cache_manager') |
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| 366 | 12 | ->addMethodCall('setTagsHeader', array($tagsHeader)) |
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| 367 | ; |
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| 368 | 12 | } |
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| 369 | |||
| 370 | 1 | private function loadTest(ContainerBuilder $container, XmlFileLoader $loader, array $config) |
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| 371 | { |
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| 372 | 1 | $container->setParameter($this->getAlias().'.test.cache_header', $config['cache_header']); |
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| 373 | |||
| 374 | 1 | if ($config['proxy_server']) { |
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| 375 | 1 | $this->loadProxyServer($container, $loader, $config['proxy_server']); |
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| 376 | } |
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| 377 | |||
| 378 | 1 | if (isset($config['client']['varnish']['enabled']) |
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| 379 | 1 | || isset($config['client']['nginx']['enabled'])) { |
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| 380 | 1 | $loader->load('test_client.xml'); |
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| 381 | |||
| 382 | 1 | if ($config['client']['varnish']['enabled']) { |
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| 383 | 1 | $loader->load('varnish_test_client.xml'); |
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| 384 | } |
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| 385 | |||
| 386 | 1 | if ($config['client']['nginx']['enabled']) { |
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| 387 | $loader->load('nginx_test_client.xml'); |
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| 388 | } |
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| 389 | |||
| 390 | 1 | $container->setAlias( |
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| 391 | 1 | $this->getAlias().'.test.default_client', |
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| 392 | 1 | $this->getAlias().'.test.client.'.$this->getDefaultProxyClient($config['client']) |
|
| 393 | ); |
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| 394 | } |
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| 395 | 1 | } |
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| 396 | |||
| 397 | 1 | private function loadProxyServer(ContainerBuilder $container, XmlFileLoader $loader, array $config) |
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| 398 | { |
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| 399 | 1 | if (isset($config['varnish'])) { |
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| 400 | 1 | $this->loadVarnishProxyServer($container, $loader, $config['varnish']); |
|
| 401 | } |
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| 402 | |||
| 403 | 1 | if (isset($config['nginx'])) { |
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| 404 | $this->loadNginxProxyServer($container, $loader, $config['varnish']); |
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| 405 | } |
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| 406 | |||
| 407 | 1 | $container->setAlias( |
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| 408 | 1 | $this->getAlias().'.test.default_proxy_server', |
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| 409 | 1 | $this->getAlias().'.test.proxy_server.'.$this->getDefaultProxyClient($config) |
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| 410 | ); |
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| 411 | 1 | } |
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| 412 | |||
| 413 | 1 | private function loadVarnishProxyServer(ContainerBuilder $container, XmlFileLoader $loader, $config) |
|
| 414 | { |
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| 415 | 1 | $loader->load('varnish_proxy.xml'); |
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| 416 | 1 | foreach ($config as $key => $value) { |
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| 417 | 1 | $container->setParameter( |
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| 418 | 1 | $this->getAlias().'.test.proxy_server.varnish.'.$key, |
|
| 419 | $value |
||
| 420 | ); |
||
| 421 | } |
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| 422 | 1 | } |
|
| 423 | |||
| 424 | private function loadNginxProxyServer(ContainerBuilder $container, XmlFileLoader $loader, $config) |
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| 425 | { |
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| 426 | $loader->load('nginx_proxy.xml'); |
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| 427 | foreach ($config as $key => $value) { |
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| 428 | $container->setParameter( |
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| 429 | $this->getAlias().'.test.proxy_server.nginx.'.$key, |
||
| 430 | $value |
||
| 431 | ); |
||
| 432 | } |
||
| 433 | } |
||
| 434 | |||
| 435 | 2 | private function loadTagRules(ContainerBuilder $container, array $config) |
|
| 436 | { |
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| 437 | 2 | $tagDefinition = $container->getDefinition($this->getAlias().'.event_listener.tag'); |
|
| 438 | |||
| 439 | 2 | foreach ($config as $rule) { |
|
| 440 | 2 | $ruleMatcher = $this->parseRuleMatcher($container, $rule['match']); |
|
| 441 | |||
| 442 | $tags = array( |
||
| 443 | 2 | 'tags' => $rule['tags'], |
|
| 444 | 2 | 'expressions' => $rule['tag_expressions'], |
|
| 445 | ); |
||
| 446 | |||
| 447 | 2 | $tagDefinition->addMethodCall('addRule', array($ruleMatcher, $tags)); |
|
| 448 | } |
||
| 449 | 2 | } |
|
| 450 | |||
| 451 | 2 | private function loadInvalidatorRules(ContainerBuilder $container, array $config) |
|
| 452 | { |
||
| 453 | 2 | $tagDefinition = $container->getDefinition($this->getAlias().'.event_listener.invalidation'); |
|
| 454 | |||
| 455 | 2 | foreach ($config as $rule) { |
|
| 456 | 2 | $ruleMatcher = $this->parseRuleMatcher($container, $rule['match']); |
|
| 457 | 2 | $tagDefinition->addMethodCall('addRule', array($ruleMatcher, $rule['routes'])); |
|
| 458 | } |
||
| 459 | 2 | } |
|
| 460 | |||
| 461 | 16 | private function validateUrl($url, $msg) |
|
| 462 | { |
||
| 463 | 16 | $prefixed = $this->prefixSchema($url); |
|
| 464 | |||
| 465 | 16 | if (!$parts = parse_url($prefixed)) { |
|
| 466 | 1 | throw new InvalidConfigurationException(sprintf($msg, $url)); |
|
| 467 | } |
||
| 468 | 16 | } |
|
| 469 | |||
| 470 | 16 | private function prefixSchema($url) |
|
| 478 | |||
| 479 | 15 | private function getDefaultProxyClient(array $config) |
|
| 480 | { |
||
| 481 | 15 | if (isset($config['default'])) { |
|
| 482 | return $config['default']; |
||
| 483 | } |
||
| 484 | |||
| 485 | 15 | if (isset($config['varnish'])) { |
|
| 486 | 12 | return 'varnish'; |
|
| 487 | } |
||
| 488 | |||
| 489 | 3 | if (isset($config['nginx'])) { |
|
| 490 | 2 | return 'nginx'; |
|
| 491 | } |
||
| 492 | |||
| 493 | 1 | if (isset($config['symfony'])) { |
|
| 494 | 1 | return 'symfony'; |
|
| 495 | } |
||
| 499 | } |
||
| 500 |
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Unless you are absolutely sure that the expression can never be null because of other conditions, we strongly recommend to add an additional type check to your code: