/** * Parse the gadget views * * @param DOMDocument $doc * @param GadgetSpec $gadget */ private function parseViews(DOMDocument &$doc, GadgetSpec &$gadget) { $views = $doc->getElementsByTagName('Content'); if (!$views || $views->length < 1) { throw new GadgetSpecException("A gadget needs to have at least one view"); } $gadget->views = array(); foreach ($views as $viewNode) { if ($viewNode->getAttribute('type' == 'url') && $viewNode->getAttribute('href') == null) { throw new GadgetSpecException("Malformed <Content> href value"); } foreach (explode(',', $viewNode->getAttribute('view')) as $view) { $view = trim($view); $href = trim($viewNode->getAttribute('href')); $type = trim(strtoupper($viewNode->getAttribute('type'))); if (empty($type)) { $type = 'html'; } $dataPipeliningRequests = array(); if (!empty($href) && $type == 'HTML') { require_once 'src/gadgets/templates/DataPipelining.php'; // a non empty href & type == 'HTML' means there might be data-pipelining tags in the content section $dataPipeliningRequests = DataPipelining::parse($viewNode); } if (isset($gadget->views[$view])) { $gadget->views[$view]['content'] .= $viewNode->nodeValue; } else { $gadget->views[$view] = array('view' => $view, 'type' => $type, 'href' => $href, 'preferedHeight' => $viewNode->getAttribute('prefered_height'), 'preferedWidth' => $viewNode->getAttribute('prefered_width'), 'quirks' => $viewNode->getAttribute('quirks'), 'content' => $viewNode->nodeValue, 'authz' => $viewNode->getAttribute('authz'), 'oauthServiceName' => $viewNode->getAttribute('oauth_service_name'), 'oauthTokenName' => $viewNode->getAttribute('oauth_token_name'), 'oauthRequestToken' => $viewNode->getAttribute('oauth_request_token'), 'oauthRequestTokenSecret' => $viewNode->getAttribute('oauth_request_token_secret'), 'signOwner' => $viewNode->getAttribute('sign_owner'), 'signViewer' => $viewNode->getAttribute('sign_viewer'), 'refreshInterval' => $viewNode->getAttribute('refresh_interval'), 'dataPipelining' => $dataPipeliningRequests); } } } }
/** * Parses and performs the (combined) os-data requests * * @param string $osDataRequests */ private function performDataRequests($osDataRequests) { //TODO check with the java implementation guys if they do a caching strategy here (same as with data-pipelining), // would result in a much higher render performance.. 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->loadXML($osDataRequests)) { $dataPipeliningRequests = array(); // walk the one or multiple script tags, and build a combined request array foreach ($this->doc->childNodes as $childNode) { if ($childNode->tagName == 'script') { $dataPipeliningRequests = array_merge($dataPipeliningRequests, DataPipelining::Parse($childNode)); } } // and perform the requests if (count($dataPipeliningRequests)) { $this->dataInserts = DataPipelining::fetch($dataPipeliningRequests, $this->context); $this->addContextData($this->dataInserts); } } else { echo "Error parsing os-data:\n" . XmlError::getErrors($osDataRequests); } }
/** * Renders a 'proxied content' view, for reference see: * http://opensocial-resources.googlecode.com/svn/spec/draft/OpenSocial-Data-Pipelining.xml * * @param Gadget $gadget * @param array $view */ public function renderGadget(Shindig_Gadget $gadget, $view) { $this->setGadget($gadget); if (Shindig_Config::get('P3P') != '') { header("P3P: " . Shindig_Config::get('P3P')); } /* TODO * We should really re-add OAuth fetching support some day, uses these view atributes: * $view['oauthServiceName'], $view['oauthTokenName'], $view['oauthRequestToken'], $view['oauthRequestTokenSecret']; */ $authz = $this->getAuthz($view); $refreshInterval = $this->getRefreshInterval($view); $href = $this->buildHref($view, $authz); if (count($view['dataPipelining'])) { $request = new RemoteContentRequest($href, "Content-type: application/json\n"); $request->setMethod('POST'); $request->getOptions()->ignoreCache = $gadget->gadgetContext->getIgnoreCache(); } else { // no data-pipelining set, use GET and set cache/refresh interval options $request = new RemoteContentRequest($href); $request->setMethod('GET'); $request->setRefreshInterval($refreshInterval); $request->getOptions()->ignoreCache = $gadget->gadgetContext->getIgnoreCache(); } $signingFetcherFactory = $gadgetSigner = false; if ($authz != 'none') { $gadgetSigner = Shindig_Config::get('security_token_signer'); $gadgetSigner = new $gadgetSigner(); $token = $gadget->gadgetContext->extractAndValidateToken($gadgetSigner); $request->setToken($token); $request->setAuthType($authz); $request->getOptions()->ownerSigned = $this->getSignOwner($view); $request->getOptions()->viewerSigned = $this->getSignViewer($view); $signingFetcherFactory = new SigningFetcherFactory(Shindig_Config::get("private_key_file")); } $remoteFetcherClass = Shindig_Config::get('remote_content_fetcher'); $remoteFetcher = new $remoteFetcherClass(); $basicRemoteContent = new BasicRemoteContent($remoteFetcher, $signingFetcherFactory, $gadgetSigner); // Cache POST's as if they were GET's, since we don't want to re-fetch and repost the social data for each view $basicRemoteContent->setCachePostRequest(true); if (($response = $basicRemoteContent->getCachedRequest($request)) == false) { // Don't fetch the data-pipelining social data unless we don't have a cached version of the gadget's content $dataPipeliningResults = DataPipelining::fetch($view['dataPipelining'], $this->context); // spec stats that the proxied content data-pipelinging data is *not* available to templates (to avoid duplicate posting // of the data to the gadget dev's server and once to js space), so we don't assign it to the data context, and just // post the json encoded results to the remote url. $request->setPostBody(json_encode($dataPipeliningResults)); $response = $basicRemoteContent->fetch($request); } if ($response->getHttpCode() != '200') { // an error occured fetching the proxied content's gadget content $content = '<html><body><h1>An error occured fetching the gadget content</h1><p>http error code: ' . $response->getHttpCode() . '</p><p>' . $response->getResponseContent() . '</body></html>'; } else { // fetched ok, build the response document and output it $content = $response->getResponseContent(); $content = $this->parseTemplates($content); $content = $this->rewriteContent($content); $content = $this->addTemplates($content); } echo $content; }