/**
* Write the connection header
* @param $endpoint
* @param Request\TrackingRequest $request
* @param bool $lastData
* @return string
* @throws Exception\EndpointServerException
*/
private function writeHeader($endpoint, Request\TrackingRequest $request, $lastData = false)
{
// create data
$payloadString = http_build_query($request->getPayload());
$payloadLength = strlen($payloadString);
$header = 'POST ' . $endpoint['path'] . ' HTTP/1.1' . "\r\n" . 'Host: ' . $endpoint['host'] . "\r\n" . 'User-Agent: Google-Measurement-PHP-Client' . "\r\n" . 'Content-Length: ' . $payloadLength . "\r\n" . ($lastData ? 'Connection: Close' . "\r\n" : '') . "\r\n";
// fwrite + check if fwrite was ok
if (!fwrite($this->connection, $header) || !fwrite($this->connection, $payloadString)) {
throw new Exception\EndpointServerException('Server closed connection unexpectedly');
}
return $header;
}
