/**
* This method should only be called directly or indirectly by fire(), but must
* remain public as it can be called by a closure function.
*
* Sends either a normal HTTP request with response or an asynchronous request
* to Google Analytics without waiting for the response. Will always return
* null in the latter case, or false if any connection problems arise.
*
* @see HttpRequest::fire()
* @param string $request
* @return null|string|bool
*/
public function _send()
{
$request = $this->buildHttpRequest();
$response = null;
// Do not actually send the request if endpoint host is set to null
if ($this->config->getEndpointHost() !== null) {
$timeout = $this->config->getRequestTimeout();
$socket = fsockopen($this->config->getEndpointHost(), 80, $errno, $errstr, $timeout);
if (!$socket) {
return false;
}
if ($this->config->getFireAndForget()) {
stream_set_blocking($socket, false);
}
$timeoutS = intval($timeout);
$timeoutUs = ($timeout - $timeoutS) * 100000;
stream_set_timeout($socket, $timeoutS, $timeoutUs);
// Ensure that the full request is sent (see http://code.google.com/p/php-ga/issues/detail?id=11)
$sentData = 0;
$toBeSentData = strlen($request);
while ($sentData < $toBeSentData) {
$sentData += fwrite($socket, $request);
}
if (!$this->config->getFireAndForget()) {
while (!feof($socket)) {
$response .= fgets($socket, 512);
}
}
fclose($socket);
}
if ($loggingCallback = $this->config->getLoggingCallback()) {
$loggingCallback($request, $response);
}
return $response;
}
