/** * Does the actual rewrite option scanning and performs the dom parsing * * @param string $content * @param Gadget $gadget */ public function rewrite($content, Shindig_Gadget &$gadget, $checkDocument = false) { // Check to see if the gadget requested rewriting, or if rewriting is forced in the configuration if (is_array($gadget->gadgetSpec->rewrite) || Shindig_Config::get('rewrite_by_default')) { require_once "src/gadgets/rewrite/ContentRewriter.php"; $contentRewriter = new ContentRewriter($this->context, $gadget); $contentRewriter->register($this); } // Are we configured to sanitize certain views? (if so the config should be an array of view names to sanitize, iaw: array('profile', 'home')) if (is_array(Shindig_Config::get('sanitize_views'))) { require_once "src/gadgets/rewrite/SanitizeRewriter.php"; $sanitizeRewriter = new SanitizeRewriter($this->context, $gadget); $sanitizeRewriter->register($this); } // no observers registered, return the original content, otherwise parse the DOM tree and call the observers if (!count($this->domObservers)) { return $content; } else { libxml_use_internal_errors(true); $this->doc = new DOMDocument(null, 'utf-8'); $this->doc->preserveWhiteSpace = true; $this->doc->formatOutput = false; $this->doc->strictErrorChecking = false; $this->doc->recover = false; $this->doc->resolveExternals = false; if (!$this->doc->loadHtml($content)) { //TODO parse and output libxml_get_errors(); libxml_clear_errors(); // parsing failed, return the unmodified content return $content; } if ($checkDocument) { $this->checkDocument(); } // find and parse all nodes in the dom document $rootNodes = $this->doc->getElementsByTagName('*'); $this->parseNodes($rootNodes); // DomDocument tries to make the document a valid html document, so added the html/body/head elements to it.. so lets strip them off before returning the content $html = $this->doc->saveHTML(); // If the gadget specified the caja feature, cajole it if (in_array('caja', $gadget->features)) { //TODO : use the caja daemon to cajole the content (experimental patch is available and will be added soon) } return $html; } }
/** * Outputs a html content type gadget. * It creates a html page, with the javascripts from the features inline into the page, plus * calls to 'gadgets.config.init' with the container configuration (config/container.js) and * 'gadgets.Prefs.setMessages_' with all the substitutions. For external javascripts it adds * a <script> tag. * * @param Gadget $gadget * @param GadgetContext $context */ private function outputHtmlGadget($gadget, $context, $view) { $content = ''; $externJs = ''; $externFmt = "<script src=\"%s\"></script>"; $forcedLibs = $context->getForcedJsLibs(); // allow the &libs=.. param to override our forced js libs configuration value if (empty($forcedLibs)) { $forcedLibs = Config::get('focedJsLibs'); } $this->setContentType("text/html; charset=UTF-8"); if ($context->getIgnoreCache()) { // no cache was requested, set non-caching-headers $this->setNoCache(true); } elseif (isset($_GET['v'])) { // version was given, cache for a long long time (a year) $this->setCacheTime(365 * 24 * 60 * 60); } else { // no version was given, cache for 5 minutes $this->setCacheTime(5 * 60); } // Was a privacy policy header configured? if so set it if (Config::get('P3P') != '') { header("P3P: " . Config::get('P3P')); } if (!$view->getQuirks()) { $content .= "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01//EN\" \"http://www.w3.org/TR/html4/strict.dtd\">\n"; } $content .= "<html><head><meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"/><style type=\"text/css\">" . Config::get('gadget_css') . "</style></head><body>\n"; // Forced libs first. if (!empty($forcedLibs)) { $libs = explode(':', $forcedLibs); $content .= sprintf($externFmt, Config::get('default_js_prefix') . $this->getJsUrl($libs, $gadget) . "&container=" . $context->getContainer()) . "\n"; } $content .= "<script>\n"; if (!empty($forcedLibs)) { // if some of the feature libraries are externalized (through a browser cachable <script src="/gadgets/js/opensocial-0.7:settitle.js"> // type url), then we don't want to include dependencies twice, so find the complete features chain, so we can skip over those $forcedLibsArray = explode(':', $forcedLibs); $registry = $this->context->getRegistry(); $missing = array(); $registry->getIncludedFeatures($forcedLibsArray, $forcedLibsArray, $missing); } foreach ($gadget->getJsLibraries() as $library) { $type = $library->getType(); if ($type == 'URL') { // TODO: This case needs to be handled more gracefully by the js // servlet. We should probably inline external JS as well. $externJs .= sprintf($externFmt, $library->getContent()) . "\n"; // else check if there are no forcedLibs, or if it wasn't included in their dep chain } elseif (empty($forcedLibs) || !in_array($library->getFeatureName(), $forcedLibsArray)) { $content .= $library->getContent(); } // otherwise it was already included by config.forceJsLibs. } $content .= $this->appendJsConfig($context, $gadget, !empty($forcedLibs)) . $this->appendMessages($gadget) . $this->appendPreloads($gadget, $context) . "</script>"; if (strlen($externJs) > 0) { $content .= $externJs; } $gadgetExceptions = array(); $rewriter = new ContentRewriter(); if ($rewriter->rewriteGadgetView($gadget, $view)) { $content .= $gadget->getSubstitutions()->substitute($view->getRewrittenContent()); } else { $content .= $gadget->getSubstitutions()->substitute($view->getContent()); } if (empty($content)) { // Unknown view $gadgetExceptions[] = "View: '" . $context->getView() . "' invalid for gadget: " . $gadget->getId()->getKey(); } if (count($gadgetExceptions)) { throw new GadgetException(print_r($gadgetExceptions, true)); } $content .= "\n<script>gadgets.util.runOnLoadHandlers();</script></body>\n</html>"; echo $content; }
private function rewriteContent($gadgetUrl, RemoteContentRequest &$result) { try { // At the moment we're only able to rewrite CSS files, so check the content type and/or the file extension before rewriting $headers = $result->getResponseHeaders(); $isCss = false; if (isset($headers['Content-Type']) && strtolower($headers['Content-Type'] == 'text/csss')) { $isCss = true; } else { $ext = substr($_GET['url'], strrpos($_GET['url'], '.') + 1); $isCss = strtolower($ext) == 'css'; } if ($isCss) { $gadget = $this->createGadget($gadgetUrl); $rewrite = $gadget->gadgetSpec->rewrite; if (is_array($rewrite)) { $contentRewriter = new ContentRewriter($this->context, $gadget); $result->setResponseContent($contentRewriter->rewriteCSS($result->getResponseContent())); } } } catch (Exception $e) { // ignore, not being able to rewrite anything isn't fatal } }