/**
* @throws GadgetException
*/
public function doGet()
{
try {
if (empty($_GET['url'])) {
throw new GadgetException("Missing required parameter: url");
}
$contextClass = Config::get('gadget_context_class');
$this->context = new $contextClass('GADGET');
$gadgetSigner = Config::get('security_token_signer');
$gadgetSigner = new $gadgetSigner();
try {
$token = $this->context->extractAndValidateToken($gadgetSigner);
} catch (Exception $e) {
// no token given, this is a fatal error if 'render_token_required' is set to true
if (Config::get('render_token_required')) {
$this->showError($e);
} else {
$token = '';
}
}
$factoryClass = Config::get('gadget_factory_class');
$gadgetSpecFactory = new $factoryClass($this->context, $token);
$gadget = $gadgetSpecFactory->createGadget();
$this->setCachingHeaders();
$this->renderGadget($gadget);
} catch (Exception $e) {
$this->showError($e);
}
}
/**
* Appends data from <Preload> elements to make them available to
* gadgets.io.
*
* @param gadget
*/
private function appendPreloads(Gadget $gadget, GadgetContext $context)
{
$resp = array();
$gadgetSigner = Config::get('security_token_signer');
$gadgetSigner = new $gadgetSigner();
$token = '';
try {
$token = $context->extractAndValidateToken($gadgetSigner);
} catch (Exception $e) {
$token = '';
// no token given, safe to ignore
}
$unsignedRequests = $unsignedContexts = array();
$signedRequests = array();
foreach ($gadget->getPreloads() as $preload) {
try {
if (($preload->getAuth() == Auth::$NONE || $token != null) && (count($preload->getViews()) == 0 || in_array($context->getView(), $preload->getViews()))) {
$request = new RemoteContentRequest($preload->getHref());
$request->createRemoteContentRequestWithUri($preload->getHref());
$request->getOptions()->ownerSigned = $preload->isSignOwner();
$request->getOptions()->viewerSigned = $preload->isSignViewer();
switch (strtoupper(trim($preload->getAuth()))) {
case "NONE":
// Unify all unsigned requests to one single multi request
$unsignedRequests[] = $request;
$unsignedContexts[] = $context;
break;
case "SIGNED":
// Unify all signed requests to one single multi request
$signingFetcherFactory = new SigningFetcherFactory(Config::get("private_key_file"));
$fetcher = $signingFetcherFactory->getSigningFetcher(new BasicRemoteContentFetcher(), $token);
$req = $fetcher->signRequest($preload->getHref(), $request->getMethod());
$req->setNotSignedUri($preload->getHref());
$signedRequests[] = $req;
break;
default:
@ob_end_clean();
header("HTTP/1.0 500 Internal Server Error", true);
echo "<html><body><h1>" . "500 - Internal Server Error" . "</h1></body></html>";
die;
}
}
} catch (Exception $e) {
throw new Exception($e);
}
}
if (count($unsignedRequests)) {
try {
$brc = new BasicRemoteContent();
$responses = $brc->multiFetch($unsignedRequests, $unsignedContexts);
foreach ($responses as $response) {
$resp[$response->getUrl()] = array('body' => $response->getResponseContent(), 'rc' => $response->getHttpCode());
}
} catch (Exception $e) {
throw new Exception($e);
}
}
if (count($signedRequests)) {
try {
$fetcher = $signingFetcherFactory->getSigningFetcher(new BasicRemoteContentFetcher(), $token);
$responses = $fetcher->multiFetchRequest($signedRequests);
foreach ($responses as $response) {
$resp[$response->getNotSignedUrl()] = array('body' => $response->getResponseContent(), 'rc' => $response->getHttpCode());
}
} catch (Exception $e) {
throw new Exception($e);
}
}
$resp = count($resp) ? json_encode($resp) : "{}";
return "gadgets.io.preloaded_ = " . $resp . ";\n";
}