/**
* Parse OAuth WWW-Authenticate header and either add them to an existing
* message or create a new message.
*
* @param msg
* @param resp
* @return the updated message.
*/
private function parseAuthHeader(ShindigOAuthRequest $msg = null, RemoteContentRequest $resp)
{
if ($msg == null) {
$msg = ShindigOAuthRequest::from_request();
}
$authHeaders = $resp->getResponseHeader("WWW-Authenticate");
if ($authHeaders != null) {
$msg->set_parameters(ShindigOAuthUtil::decodeAuthorization($authHeaders));
}
return $msg;
}
private function setRequestCache(RemoteContentRequest $originalRequest, RemoteContentRequest $request, Cache $cache)
{
if ($request->isStrictNoCache()) {
return;
}
$ignoreCache = $originalRequest->getOptions()->ignoreCache;
if (($this->cachePostRequest || !$request->isPost()) && !$ignoreCache) {
$ttl = Shindig_Config::get('cache_time');
if ((int) $request->getHttpCode() == 200) {
// Got a 200 OK response, calculate the TTL to use for caching it
if (($expires = $request->getResponseHeader('Expires')) != null) {
// prefer to use the servers notion of the time since there could be a clock-skew, but otherwise use our own
$date = $request->getResponseHeader('Date') != null ? $request->getResponseHeader('Date') : gmdate('D, d M Y H:i:s', $_SERVER['REQUEST_TIME']) . ' GMT';
// convert both dates to unix epoch seconds, and calculate the TTL
date_default_timezone_set('GMT');
$date = strtotime($date);
$expires = strtotime($expires);
$ttl = $expires - $date;
// Don't fall for the old expiration-date-in-the-past trick, we *really* want to cache stuff since a large SNS's traffic would devastate a gadget developer's server
if ($expires - $date > 1) {
$ttl = $expires - $date;
}
}
// See http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html : The Cache-Control: max-age=<seconds> overrides the expires header, so if both are present this one will overwrite the $ttl
if (($cacheControl = $request->getResponseHeader('Cache-Control')) != null) {
$bits = explode('=', $cacheControl);
foreach ($bits as $key => $val) {
if ($val == 'max-age' && isset($bits[$key + 1])) {
$ttl = $bits[$key + 1];
break;
}
}
}
} else {
$ttl = 5 * 60;
// cache errors for 5 minutes, takes the denial of service attack type behaviour out of having an error :)
}
$this->invalidateService->markResponse($request);
$this->cache->set($originalRequest->toHash(), $request, $ttl);
}
}
