287 lines
10 KiB
PHP
287 lines
10 KiB
PHP
<?php
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/**
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* ErrorPage holds the content for the page of an error response.
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* Renders the page on each publish action into a static HTML file
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* within the assets directory, after the naming convention
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* /assets/error-<statuscode>.html.
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* This enables us to show errors even if PHP experiences a recoverable error.
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* ErrorPages
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*
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* @see Debug::friendlyError()
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*
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* @package cms
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*/
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class ErrorPage extends Page {
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static $db = array(
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"ErrorCode" => "Int",
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);
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static $defaults = array(
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"ShowInMenus" => 0,
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"ShowInSearch" => 0
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);
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static $icon = array("sapphire/javascript/tree/images/page", "file");
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static $description = 'Custom content for different error cases (e.g. "Page not found")';
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protected static $static_filepath = ASSETS_PATH;
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public function canAddChildren($member = null) { return false; }
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/**
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* Get a {@link SS_HTTPResponse} to response to a HTTP error code if an {@link ErrorPage} for that code is present.
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*
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* @param int $statusCode
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* @return SS_HTTPResponse
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*/
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public static function response_for($statusCode) {
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// first attempt to dynamically generate the error page
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if($errorPage = DataObject::get_one('ErrorPage', "\"ErrorCode\" = $statusCode")) {
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return ModelAsController::controller_for($errorPage)->handleRequest(new SS_HTTPRequest('GET', ''));
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}
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// then fall back on a cached version
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$cachedPath = self::get_filepath_for_errorcode(
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$statusCode,
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class_exists('Translatable') ? Translatable::get_current_locale() : null
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);
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if(file_exists($cachedPath)) {
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$response = new SS_HTTPResponse();
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$response->setStatusCode($statusCode);
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$response->setBody(file_get_contents($cachedPath));
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return $response;
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}
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}
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/**
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* Ensures that there is always a 404 page
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* by checking if there's an instance of
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* ErrorPage with a 404 and 500 error code. If there
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* is not, one is created when the DB is built.
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*/
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function requireDefaultRecords() {
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parent::requireDefaultRecords();
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if ($this->class == 'ErrorPage' && SiteTree::get_create_default_pages()) {
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// Ensure that an assets path exists before we do any error page creation
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if(!file_exists(ASSETS_PATH)) {
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mkdir(ASSETS_PATH);
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}
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$pageNotFoundErrorPage = DataObject::get_one('ErrorPage', "\"ErrorCode\" = '404'");
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$pageNotFoundErrorPageExists = ($pageNotFoundErrorPage && $pageNotFoundErrorPage->exists()) ? true : false;
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$pageNotFoundErrorPagePath = self::get_filepath_for_errorcode(404);
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if(!($pageNotFoundErrorPageExists && file_exists($pageNotFoundErrorPagePath))) {
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if(!$pageNotFoundErrorPageExists) {
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$pageNotFoundErrorPage = new ErrorPage();
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$pageNotFoundErrorPage->ErrorCode = 404;
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$pageNotFoundErrorPage->Title = _t('ErrorPage.DEFAULTERRORPAGETITLE', 'Page not found');
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$pageNotFoundErrorPage->Content = _t('ErrorPage.DEFAULTERRORPAGECONTENT', '<p>Sorry, it seems you were trying to access a page that doesn\'t exist.</p><p>Please check the spelling of the URL you were trying to access and try again.</p>');
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$pageNotFoundErrorPage->write();
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$pageNotFoundErrorPage->publish('Stage', 'Live');
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}
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// Ensure a static error page is created from latest error page content
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$response = Director::test(Director::makeRelative($pageNotFoundErrorPage->Link()));
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if($fh = fopen($pageNotFoundErrorPagePath, 'w')) {
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$written = fwrite($fh, $response->getBody());
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fclose($fh);
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}
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if($written) {
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DB::alteration_message('404 error page created', 'created');
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} else {
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DB::alteration_message(sprintf('404 error page could not be created at %s. Please check permissions', $pageNotFoundErrorPagePath), 'error');
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}
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}
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$serverErrorPage = DataObject::get_one('ErrorPage', "\"ErrorCode\" = '500'");
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$serverErrorPageExists = ($serverErrorPage && $serverErrorPage->exists()) ? true : false;
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$serverErrorPagePath = self::get_filepath_for_errorcode(500);
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if(!($serverErrorPageExists && file_exists($serverErrorPagePath))) {
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if(!$serverErrorPageExists) {
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$serverErrorPage = new ErrorPage();
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$serverErrorPage->ErrorCode = 500;
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$serverErrorPage->Title = _t('ErrorPage.DEFAULTSERVERERRORPAGETITLE', 'Server error');
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$serverErrorPage->Content = _t('ErrorPage.DEFAULTSERVERERRORPAGECONTENT', '<p>Sorry, there was a problem with handling your request.</p>');
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$serverErrorPage->write();
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$serverErrorPage->publish('Stage', 'Live');
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}
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// Ensure a static error page is created from latest error page content
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$response = Director::test(Director::makeRelative($serverErrorPage->Link()));
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if($fh = fopen($serverErrorPagePath, 'w')) {
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$written = fwrite($fh, $response->getBody());
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fclose($fh);
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}
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if($written) {
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DB::alteration_message('500 error page created', 'created');
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} else {
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DB::alteration_message(sprintf('500 error page could not be created at %s. Please check permissions', $serverErrorPagePath), 'error');
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}
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}
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}
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}
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function getCMSFields() {
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$fields = parent::getCMSFields();
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$fields->addFieldToTab(
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"Root.Content",
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new DropdownField(
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"ErrorCode",
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$this->fieldLabel('ErrorCode'),
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array(
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400 => _t('ErrorPage.400', '400 - Bad Request'),
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401 => _t('ErrorPage.401', '401 - Unauthorized'),
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403 => _t('ErrorPage.403', '403 - Forbidden'),
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404 => _t('ErrorPage.404', '404 - Not Found'),
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405 => _t('ErrorPage.405', '405 - Method Not Allowed'),
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406 => _t('ErrorPage.406', '406 - Not Acceptable'),
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407 => _t('ErrorPage.407', '407 - Proxy Authentication Required'),
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408 => _t('ErrorPage.408', '408 - Request Timeout'),
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409 => _t('ErrorPage.409', '409 - Conflict'),
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410 => _t('ErrorPage.410', '410 - Gone'),
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411 => _t('ErrorPage.411', '411 - Length Required'),
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412 => _t('ErrorPage.412', '412 - Precondition Failed'),
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413 => _t('ErrorPage.413', '413 - Request Entity Too Large'),
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414 => _t('ErrorPage.414', '414 - Request-URI Too Long'),
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415 => _t('ErrorPage.415', '415 - Unsupported Media Type'),
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416 => _t('ErrorPage.416', '416 - Request Range Not Satisfiable'),
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417 => _t('ErrorPage.417', '417 - Expectation Failed'),
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500 => _t('ErrorPage.500', '500 - Internal Server Error'),
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501 => _t('ErrorPage.501', '501 - Not Implemented'),
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502 => _t('ErrorPage.502', '502 - Bad Gateway'),
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503 => _t('ErrorPage.503', '503 - Service Unavailable'),
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504 => _t('ErrorPage.504', '504 - Gateway Timeout'),
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505 => _t('ErrorPage.505', '505 - HTTP Version Not Supported'),
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)
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),
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"Content"
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);
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return $fields;
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}
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/**
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* When an error page is published, create a static HTML page with its
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* content, so the page can be shown even when SilverStripe is not
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* functioning correctly before publishing this page normally.
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* @param string|int $fromStage Place to copy from. Can be either a stage name or a version number.
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* @param string $toStage Place to copy to. Must be a stage name.
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* @param boolean $createNewVersion Set this to true to create a new version number. By default, the existing version number will be copied over.
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*/
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function doPublish() {
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parent::doPublish();
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// Run the page (reset the theme, it might've been disabled by LeftAndMain::init())
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$oldTheme = SSViewer::current_theme();
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SSViewer::set_theme(SSViewer::current_custom_theme());
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$response = Director::test(Director::makeRelative($this->Link()));
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SSViewer::set_theme($oldTheme);
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$errorContent = $response->getBody();
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// Make the base tag dynamic.
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// $errorContent = preg_replace('/<base[^>]+href="' . str_replace('/','\\/', Director::absoluteBaseURL()) . '"[^>]*>/i', '<base href="$BaseURL" />', $errorContent);
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// Check we have an assets base directory, creating if it we don't
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if(!file_exists(ASSETS_PATH)) {
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mkdir(ASSETS_PATH, 02775);
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}
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// if the page is published in a language other than default language,
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// write a specific language version of the HTML page
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$filePath = self::get_filepath_for_errorcode($this->ErrorCode, $this->Locale);
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if($fh = fopen($filePath, "w")) {
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fwrite($fh, $errorContent);
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fclose($fh);
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} else {
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$fileErrorText = sprintf(
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_t(
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"ErrorPage.ERRORFILEPROBLEM",
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"Error opening file \"%s\" for writing. Please check file permissions."
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),
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$errorFile
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);
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FormResponse::status_message($fileErrorText, 'bad');
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FormResponse::respond();
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return;
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}
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}
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/**
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*
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* @param boolean $includerelations a boolean value to indicate if the labels returned include relation fields
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*
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*/
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function fieldLabels($includerelations = true) {
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$labels = parent::fieldLabels($includerelations);
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$labels['ErrorCode'] = _t('ErrorPage.CODE', "Error code");
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return $labels;
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}
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/**
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* Returns an absolute filesystem path to a static error file
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* which is generated through {@link publish()}.
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*
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* @param int $statusCode A HTTP Statuscode, mostly 404 or 500
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* @param String $locale A locale, e.g. 'de_DE' (Optional)
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* @return String
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*/
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static function get_filepath_for_errorcode($statusCode, $locale = null) {
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if (singleton('ErrorPage')->hasMethod('alternateFilepathForErrorcode')) {
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return singleton('ErrorPage')-> alternateFilepathForErrorcode($statusCode, $locale);
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}
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if(class_exists('Translatable') && singleton('SiteTree')->hasExtension('Translatable') && $locale && $locale != Translatable::default_locale()) {
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return self::$static_filepath . "/error-{$statusCode}-{$locale}.html";
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} else {
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return self::$static_filepath . "/error-{$statusCode}.html";
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}
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}
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/**
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* Set the path where static error files are saved through {@link publish()}.
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* Defaults to /assets.
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*
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* @param string $path
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*/
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static function set_static_filepath($path) {
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self::$static_filepath = $path;
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}
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/**
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* @return string
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*/
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static function get_static_filepath() {
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return self::$static_filepath;
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}
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}
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/**
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* Controller for ErrorPages.
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* @package cms
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*/
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class ErrorPage_Controller extends Page_Controller {
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function init() {
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parent::init();
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$action = $this->request->param('Action');
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if(!$action || $action == 'index') {
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Director::set_status_code($this->failover->ErrorCode ? $this->failover->ErrorCode : 404);
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}
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}
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}
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?>
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