/**
* main push request/ websocket response loop
*/
function onRequest(Request $request, Response $response)
{
$content = '';
$headers = $request->getHeaders();
$contentLength = isset($headers['Content-Length']) ? (int) $headers['Content-Length'] : null;
// length required, chunked encoding not supported
if (null === $contentLength) {
$response->writeHead(411);
$response->end();
return;
}
$request->on('data', function ($data) use($request, $response, &$content, $contentLength) {
// read data (may be empty for GET request)
$content .= $data;
// handle request after receive
if (strlen($content) >= $contentLength) {
$headers = array('Content-Type' => 'application/json');
try {
$data = $this->hub->handlePushMessage($content);
$headers['Content-Length'] = strlen($data);
if (null === $data) {
$response->writeHead(400, $headers);
$response->end();
} else {
$response->writeHead(200, $headers);
$response->end($data);
}
} catch (\Exception $exception) {
$data = $this->getExceptionAsJson($exception, true);
$headers['Content-Length'] = strlen($data);
$response->writeHead(500, $headers);
// internal server error
$response->end($data);
}
}
});
}