| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | use SilverStripe\Filesystem\Storage\GeneratedAssetHandler; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  |  * ErrorPage holds the content for the page of an error response. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  |  * Renders the page on each publish action into a static HTML file | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  |  * within the assets directory, after the naming convention | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  |  * /assets/error-<statuscode>.html. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  |  * This enables us to show errors even if PHP experiences a recoverable error. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  |  * ErrorPages | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  |  * @see Debug::friendlyError() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  |  * @property int $ErrorCode HTTP Error code | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  |  * @package cms | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  | class ErrorPage extends Page { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  | 	private static $db = array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  | 		"ErrorCode" => "Int", | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  | 	); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  | 	private static $defaults = array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  | 		"ShowInMenus" => 0, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  | 		"ShowInSearch" => 0 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  | 	); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  | 	private static $allowed_children = array(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  | 	private static $description = 'Custom content for different error cases (e.g. "Page not found")'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  | 	 * Allows control over writing directly to the configured `GeneratedAssetStore`. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  | 	 * @config | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  | 	 * @var bool | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  | 	private static $enable_static_file = true; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  | 	 * Prefix for storing error files in the {@see GeneratedAssetHandler} store. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 |  |  | 	 * Defaults to empty (top level directory) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 |  |  | 	 * @config | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 |  |  | 	 * @var string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 46 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 |  |  | 	private static $store_filepath = null; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 |  |  | 	 * @param $member | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  | 	 * @return boolean | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  | 	public function canAddChildren($member = null) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  | 		return false; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  | 	 * Get a {@link SS_HTTPResponse} to response to a HTTP error code if an | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  | 	 * {@link ErrorPage} for that code is present. First tries to serve it | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  | 	 * through the standard SilverStripe request method. Falls back to a static | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  | 	 * file generated when the user hit's save and publish in the CMS | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  | 	 * @param int $statusCode | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 |  |  | 	 * @return SS_HTTPResponse | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 65 |  |  | 	 */ | 
            
                                                                        
                            
            
                                    
            
            
                | 66 |  |  | 	public static function response_for($statusCode) { | 
            
                                                                        
                            
            
                                    
            
            
                | 67 |  |  | 		// first attempt to dynamically generate the error page | 
            
                                                                        
                            
            
                                    
            
            
                | 68 |  |  | 		$errorPage = ErrorPage::get() | 
            
                                                                        
                            
            
                                    
            
            
                | 69 |  |  | 			->filter(array( | 
            
                                                                        
                            
            
                                    
            
            
                | 70 |  |  | 				"ErrorCode" => $statusCode | 
            
                                                                        
                            
            
                                    
            
            
                | 71 |  |  | 			))->first(); | 
            
                                                                        
                            
            
                                    
            
            
                | 72 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 73 |  |  | 		if($errorPage) { | 
            
                                                                        
                            
            
                                    
            
            
                | 74 |  |  | 			Requirements::clear(); | 
            
                                                                        
                            
            
                                    
            
            
                | 75 |  |  | 			Requirements::clear_combined_files(); | 
            
                                                                        
                            
            
                                    
            
            
                | 76 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 77 |  |  | 			return ModelAsController::controller_for($errorPage) | 
            
                                                                        
                            
            
                                    
            
            
                | 78 |  |  | 				->handleRequest( | 
            
                                                                        
                            
            
                                    
            
            
                | 79 |  |  | 					new SS_HTTPRequest('GET', ''), | 
            
                                                                        
                            
            
                                    
            
            
                | 80 |  |  | 					DataModel::inst() | 
            
                                                                        
                            
            
                                    
            
            
                | 81 |  |  | 				); | 
            
                                                                        
                            
            
                                    
            
            
                | 82 |  |  | 		} | 
            
                                                                        
                            
            
                                    
            
            
                | 83 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 84 |  |  | 		// then fall back on a cached version | 
            
                                                                        
                            
            
                                    
            
            
                | 85 |  |  | 		$content = self::get_content_for_errorcode($statusCode); | 
            
                                                                        
                            
            
                                    
            
            
                | 86 |  |  | 		if($content) { | 
                            
                    |  |  |  | 
                                                                                        
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                | 87 |  |  | 			$response = new SS_HTTPResponse(); | 
            
                                                                        
                            
            
                                    
            
            
                | 88 |  |  | 			$response->setStatusCode($statusCode); | 
            
                                                                        
                            
            
                                    
            
            
                | 89 |  |  | 			$response->setBody($content); | 
            
                                                                        
                            
            
                                    
            
            
                | 90 |  |  | 			return $response; | 
            
                                                                        
                            
            
                                    
            
            
                | 91 |  |  | 		} | 
            
                                                                        
                            
            
                                    
            
            
                | 92 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  | 	 * Ensures that there is always a 404 page by checking if there's an | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  | 	 * instance of ErrorPage with a 404 and 500 error code. If there is not, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  | 	 * one is created when the DB is built. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 99 |  |  | 	public function requireDefaultRecords() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 100 |  |  | 		parent::requireDefaultRecords(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 101 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 102 |  |  | 		if ($this->class === 'ErrorPage' && SiteTree::config()->create_default_pages) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 103 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 104 |  |  | 			$defaultPages = $this->getDefaultRecords(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 105 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 106 |  |  | 			foreach($defaultPages as $defaultData) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 107 |  |  | 				$code = $defaultData['ErrorCode']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 108 |  |  | 				$page = ErrorPage::get()->filter('ErrorCode', $code)->first(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 109 |  |  | 				$pageExists = !empty($page); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 110 |  |  | 				if(!$pageExists) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 111 |  |  | 					$page = new ErrorPage($defaultData); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  | 					$page->write(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 |  |  | 					$page->copyVersionToStage(Versioned::DRAFT, Versioned::LIVE); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 114 |  |  | 				} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 115 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 116 |  |  | 				// Check if static files are enabled | 
            
                                                                                                            
                            
            
                                    
            
            
                | 117 |  |  | 				if(!self::config()->enable_static_file) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 118 |  |  | 					continue; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 119 |  |  | 				} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 120 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 121 |  |  | 				// Ensure this page has cached error content | 
            
                                                                                                            
                            
            
                                    
            
            
                | 122 |  |  | 				$success = true; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 123 |  |  | 				if(!$page->hasStaticPage()) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 124 |  |  | 					// Update static content | 
            
                                                                                                            
                            
            
                                    
            
            
                | 125 |  |  | 					$success = $page->writeStaticPage(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 126 |  |  | 				} elseif($pageExists) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 127 |  |  | 					// If page exists and already has content, no alteration_message is displayed | 
            
                                                                                                            
                            
            
                                    
            
            
                | 128 |  |  | 					continue; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 129 |  |  | 				} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 130 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 131 |  |  | 				if($success) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 132 |  |  | 					DB::alteration_message( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 133 |  |  | 						sprintf('%s error page created', $code), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 134 |  |  | 						'created' | 
            
                                                                                                            
                            
            
                                    
            
            
                | 135 |  |  | 					); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 136 |  |  | 				} else { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 137 |  |  | 					DB::alteration_message( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 138 |  |  | 						sprintf('%s error page could not be created. Please check permissions', $code), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 139 |  |  | 						'error' | 
            
                                                                                                            
                            
            
                                    
            
            
                | 140 |  |  | 					); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 141 |  |  | 				} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 142 |  |  | 			} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 143 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 144 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 145 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 146 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 147 |  |  | 	 * Returns an array of arrays, each of which defines properties for a new | 
            
                                                                                                            
                            
            
                                    
            
            
                | 148 |  |  | 	 * ErrorPage record. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 149 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 150 |  |  | 	 * @return array | 
            
                                                                                                            
                            
            
                                    
            
            
                | 151 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 152 |  |  | 	protected function getDefaultRecords() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 153 |  |  | 		$data = array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 154 |  |  | 			array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 155 |  |  | 				'ErrorCode' => 404, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 156 |  |  | 				'Title' => _t('ErrorPage.DEFAULTERRORPAGETITLE', 'Page not found'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 157 |  |  | 				'Content' => _t( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 158 |  |  | 					'ErrorPage.DEFAULTERRORPAGECONTENT', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 159 |  |  | 					'<p>Sorry, it seems you were trying to access a page that doesn\'t exist.</p>' | 
            
                                                                                                            
                            
            
                                    
            
            
                | 160 |  |  | 					. '<p>Please check the spelling of the URL you were trying to access and try again.</p>' | 
            
                                                                                                            
                            
            
                                    
            
            
                | 161 |  |  | 				) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 162 |  |  | 			), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 163 |  |  | 			array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 164 |  |  | 				'ErrorCode' => 500, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 165 |  |  | 				'Title' => _t('ErrorPage.DEFAULTSERVERERRORPAGETITLE', 'Server error'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 166 |  |  | 				'Content' => _t( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 167 |  |  | 					'ErrorPage.DEFAULTSERVERERRORPAGECONTENT', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 168 |  |  | 					'<p>Sorry, there was a problem with handling your request.</p>' | 
            
                                                                                                            
                            
            
                                    
            
            
                | 169 |  |  | 				) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 170 |  |  | 			) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 171 |  |  | 		); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 172 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 173 |  |  | 		$this->extend('getDefaultRecords', $data); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 174 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 175 |  |  | 		return $data; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 176 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 177 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 178 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 179 |  |  | 	 * @return FieldList | 
            
                                                                                                            
                            
            
                                    
            
            
                | 180 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 181 |  |  | 	public function getCMSFields() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 182 |  |  | 		$fields = parent::getCMSFields(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 183 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 184 |  |  | 		$fields->addFieldToTab( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 185 |  |  | 			"Root.Main", | 
            
                                                                                                            
                            
            
                                    
            
            
                | 186 |  |  | 			new DropdownField( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 187 |  |  | 				"ErrorCode", | 
            
                                                                                                            
                            
            
                                    
            
            
                | 188 |  |  | 				$this->fieldLabel('ErrorCode'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 189 |  |  | 				array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 190 |  |  | 					400 => _t('ErrorPage.400', '400 - Bad Request'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 191 |  |  | 					401 => _t('ErrorPage.401', '401 - Unauthorized'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 192 |  |  | 					403 => _t('ErrorPage.403', '403 - Forbidden'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 193 |  |  | 					404 => _t('ErrorPage.404', '404 - Not Found'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 194 |  |  | 					405 => _t('ErrorPage.405', '405 - Method Not Allowed'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 195 |  |  | 					406 => _t('ErrorPage.406', '406 - Not Acceptable'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 196 |  |  | 					407 => _t('ErrorPage.407', '407 - Proxy Authentication Required'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 197 |  |  | 					408 => _t('ErrorPage.408', '408 - Request Timeout'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 198 |  |  | 					409 => _t('ErrorPage.409', '409 - Conflict'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 199 |  |  | 					410 => _t('ErrorPage.410', '410 - Gone'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 200 |  |  | 					411 => _t('ErrorPage.411', '411 - Length Required'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 201 |  |  | 					412 => _t('ErrorPage.412', '412 - Precondition Failed'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 202 |  |  | 					413 => _t('ErrorPage.413', '413 - Request Entity Too Large'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 203 |  |  | 					414 => _t('ErrorPage.414', '414 - Request-URI Too Long'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 204 |  |  | 					415 => _t('ErrorPage.415', '415 - Unsupported Media Type'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 205 |  |  | 					416 => _t('ErrorPage.416', '416 - Request Range Not Satisfiable'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 206 |  |  | 					417 => _t('ErrorPage.417', '417 - Expectation Failed'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 207 |  |  | 					422 => _t('ErrorPage.422', '422 - Unprocessable Entity'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 208 |  |  | 					429 => _t('ErrorPage.429', '429 - Too Many Requests'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 209 |  |  | 					500 => _t('ErrorPage.500', '500 - Internal Server Error'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 210 |  |  | 					501 => _t('ErrorPage.501', '501 - Not Implemented'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 211 |  |  | 					502 => _t('ErrorPage.502', '502 - Bad Gateway'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 212 |  |  | 					503 => _t('ErrorPage.503', '503 - Service Unavailable'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 213 |  |  | 					504 => _t('ErrorPage.504', '504 - Gateway Timeout'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 214 |  |  | 					505 => _t('ErrorPage.505', '505 - HTTP Version Not Supported'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 215 |  |  | 				) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 216 |  |  | 			), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 217 |  |  | 			"Content" | 
            
                                                                                                            
                            
            
                                    
            
            
                | 218 |  |  | 		); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 219 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 220 |  |  | 		return $fields; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 221 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 222 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 223 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 224 |  |  | 	 * When an error page is published, create a static HTML page with its | 
            
                                                                                                            
                            
            
                                    
            
            
                | 225 |  |  | 	 * content, so the page can be shown even when SilverStripe is not | 
            
                                                                                                            
                            
            
                                    
            
            
                | 226 |  |  | 	 * functioning correctly before publishing this page normally. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 227 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 228 |  |  | 	 * @return bool True if published | 
            
                                                                                                            
                            
            
                                    
            
            
                | 229 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 230 |  |  | 	public function publishSingle() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 231 |  |  | 		if (!parent::publishSingle()) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 232 |  |  | 			return false; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 233 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 234 |  |  | 		return $this->writeStaticPage(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 235 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 236 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 237 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 238 |  |  | 	 * Determine if static content is cached for this page | 
            
                                                                                                            
                            
            
                                    
            
            
                | 239 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 240 |  |  | 	 * @return bool | 
            
                                                                                                            
                            
            
                                    
            
            
                | 241 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 242 |  | View Code Duplication | 	protected function hasStaticPage() { | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 243 |  |  | 		if(!self::config()->enable_static_file) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 244 |  |  | 			return false; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 245 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 246 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 247 |  |  | 		// Attempt to retrieve content from generated file handler | 
            
                                                                                                            
                            
            
                                    
            
            
                | 248 |  |  | 		$filename = $this->getErrorFilename(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 249 |  |  | 		$storeFilename = File::join_paths(self::config()->store_filepath, $filename); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 250 |  |  | 		$result = self::get_asset_handler()->getContent($storeFilename); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 251 |  |  | 		return !empty($result); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 252 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 253 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 254 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 255 |  |  | 	 * Write out the published version of the page to the filesystem | 
            
                                                                                                            
                            
            
                                    
            
            
                | 256 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 257 |  |  | 	 * @return true if the page write was successful | 
            
                                                                                                            
                            
            
                                    
            
            
                | 258 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 259 |  |  | 	public function writeStaticPage() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 260 |  |  | 		if(!self::config()->enable_static_file) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 261 |  |  | 			return false; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 262 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 263 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 264 |  |  | 		// Run the page (reset the theme, it might've been disabled by LeftAndMain::init()) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 265 |  |  | 		Config::nest(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 266 |  |  | 		Config::inst()->update('SSViewer', 'theme_enabled', true); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 267 |  |  | 		$response = Director::test(Director::makeRelative($this->Link())); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 268 |  |  | 		Config::unnest(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 269 |  |  | 		$errorContent = $response->getBody(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 270 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 271 |  |  | 		// Store file content in the default store | 
            
                                                                                                            
                            
            
                                    
            
            
                | 272 |  |  | 		$storeFilename = File::join_paths( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 273 |  |  | 			self::config()->store_filepath, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 274 |  |  | 			$this->getErrorFilename() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 275 |  |  | 		); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 276 |  |  | 		self::get_asset_handler()->setContent($storeFilename, $errorContent); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 277 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 278 |  |  | 		// Success | 
            
                                                                                                            
                            
            
                                    
            
            
                | 279 |  |  | 		return true; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 280 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 281 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 282 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 283 |  |  | 	 * @param boolean $includerelations a boolean value to indicate if the labels returned include relation fields | 
            
                                                                                                            
                            
            
                                    
            
            
                | 284 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 285 |  |  | 	 * @return array | 
            
                                                                                                            
                            
            
                                    
            
            
                | 286 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 287 |  |  | 	public function fieldLabels($includerelations = true) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 288 |  |  | 		$labels = parent::fieldLabels($includerelations); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 289 |  |  | 		$labels['ErrorCode'] = _t('ErrorPage.CODE', "Error code"); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 290 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 291 |  |  | 		return $labels; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 292 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 293 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 294 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 295 |  |  | 	 * Returns statically cached content for a given error code | 
            
                                                                                                            
                            
            
                                    
            
            
                | 296 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 297 |  |  | 	 * @param int $statusCode A HTTP Statuscode, typically 404 or 500 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 298 |  |  | 	 * @return string|null | 
            
                                                                                                            
                            
            
                                    
            
            
                | 299 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 300 |  | View Code Duplication | 	public static function get_content_for_errorcode($statusCode) { | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 301 |  |  | 		if(!self::config()->enable_static_file) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 302 |  |  | 			return null; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 303 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 304 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 305 |  |  | 		// Attempt to retrieve content from generated file handler | 
            
                                                                                                            
                            
            
                                    
            
            
                | 306 |  |  | 		$filename = self::get_error_filename($statusCode); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 307 |  |  | 		$storeFilename = File::join_paths( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 308 |  |  | 			self::config()->store_filepath, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 309 |  |  | 			$filename | 
            
                                                                                                            
                            
            
                                    
            
            
                | 310 |  |  | 		); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 311 |  |  | 		return self::get_asset_handler()->getContent($storeFilename); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 312 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 313 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 314 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 315 |  |  | 	 * Gets the filename identifier for the given error code. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 316 |  |  | 	 * Used when handling responses under error conditions. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 317 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 318 |  |  | 	 * @param int $statusCode A HTTP Statuscode, typically 404 or 500 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 319 |  |  | 	 * @param ErrorPage $instance Optional instance to use for name generation | 
            
                                                                                                            
                            
            
                                    
            
            
                | 320 |  |  | 	 * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 321 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 322 |  |  | 	protected static function get_error_filename($statusCode, $instance = null) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 323 |  |  | 		if(!$instance) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 324 |  |  | 			$instance = ErrorPage::singleton(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 325 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 326 |  |  | 		// Allow modules to extend this filename (e.g. for multi-domain, translatable) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 327 |  |  | 		$name = "error-{$statusCode}.html"; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 328 |  |  | 		$instance->extend('updateErrorFilename', $name, $statusCode); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 329 |  |  | 		return $name; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 330 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 331 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 332 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 333 |  |  | 	 * Get filename identifier for this record. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 334 |  |  | 	 * Used for generating the filename for the current record. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 335 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 336 |  |  | 	 * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 337 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 338 |  |  | 	protected function getErrorFilename() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 339 |  |  | 		return self::get_error_filename($this->ErrorCode, $this); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 340 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 341 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 342 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 343 |  |  | 	 * @return GeneratedAssetHandler | 
            
                                                                                                            
                            
            
                                    
            
            
                | 344 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 345 |  |  | 	protected static function get_asset_handler() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 346 |  |  | 		return Injector::inst()->get('GeneratedAssetHandler'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 347 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 348 |  |  | } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 349 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 350 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 351 |  |  |  * Controller for ErrorPages. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 352 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 353 |  |  |  * @package cms | 
            
                                                                                                            
                            
            
                                    
            
            
                | 354 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 355 |  |  | class ErrorPage_Controller extends Page_Controller { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 356 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 357 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 358 |  |  | 	 * Overload the provided {@link Controller::handleRequest()} to append the | 
            
                                                                                                            
                            
            
                                    
            
            
                | 359 |  |  | 	 * correct status code post request since otherwise permission related error | 
            
                                                                                                            
                            
            
                                    
            
            
                | 360 |  |  | 	 * pages such as 401 and 403 pages won't be rendered due to | 
            
                                                                                                            
                            
            
                                    
            
            
                | 361 |  |  | 	  * {@link SS_HTTPResponse::isFinished() ignoring the response body. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 362 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 363 |  |  | 	 * @param SS_HTTPRequest $request | 
            
                                                                                                            
                            
            
                                    
            
            
                | 364 |  |  | 	 * @param DataModel $model | 
            
                                                                                                            
                            
            
                                    
            
            
                | 365 |  |  | 	 * @return SS_HTTPResponse | 
            
                                                                                                            
                            
            
                                    
            
            
                | 366 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 367 |  |  | 	public function handleRequest(SS_HTTPRequest $request, DataModel $model = NULL) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 368 |  |  | 		$response = parent::handleRequest($request, $model); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 369 |  |  | 		$response->setStatusCode($this->ErrorCode); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 370 |  |  | 		return $response; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 371 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 372 |  |  | } | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 373 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 374 |  |  |  | 
            
                        
In PHP, under loose comparison (like
==, or!=, orswitchconditions), values of different types might be equal.For
stringvalues, the empty string''is a special case, in particular the following results might be unexpected: