public function start()
{
if ($this->isActive || $this->isStopped) {
return;
}
$this->isActive = true;
$this->isStarted = true;
$curlHandle = curl_multi_init();
try {
do {
// send requests from queue to CURL
if (count($this->activeRequests) < $this->connectionsLimit) {
for ($i = $this->connectionsLimit - count($this->activeRequests); $i > 0; $i--) {
$request = $this->queue->pop();
if ($request) {
$this->sendRequestToMultiCurl($curlHandle, $request);
$this->activeRequests[$request->getId()] = $request;
} else {
break;
}
}
}
while (CURLM_CALL_MULTI_PERFORM === curl_multi_exec($curlHandle, $activeThreads)) {
}
// check complete requests
curl_multi_select($curlHandle, $this->requestingDelay);
while ($completeCurlInfo = curl_multi_info_read($curlHandle)) {
$completeRequestId = Request::getRequestIdByCurlHandle($completeCurlInfo['handle']);
$completeRequest = $this->activeRequests[$completeRequestId];
unset($this->activeRequests[$completeRequestId]);
curl_multi_remove_handle($curlHandle, $completeRequest->getCurlHandle());
$completeRequest->handleCurlResult();
// check if response code is 301 or 302 and follow location
$ignoreNotification = false;
$completeRequestCode = $completeRequest->getCode();
if ($completeRequestCode == 301 || $completeRequestCode == 302) {
$completeRequestOptions = $completeRequest->getCurlOptions();
if (!empty($completeRequestOptions[CURLOPT_FOLLOWLOCATION])) {
$completeRequest->_permanentlyMoved = empty($completeRequest->_permanentlyMoved) ? 1 : $completeRequest->_permanentlyMoved + 1;
$responseHeaders = $completeRequest->getResponseHeaders(true);
if ($completeRequest->_permanentlyMoved < 5 && !empty($responseHeaders['Location'])) {
// figure out whether we're dealing with an absolute or relative redirect (thanks to kmontag https://github.com/kmontag for this bugfix)
$redirectedUrl = (parse_url($responseHeaders['Location'], PHP_URL_SCHEME) === null ? $completeRequest->getBaseUrl() : '') . $responseHeaders['Location'];
$completeRequest->setUrl($redirectedUrl);
$completeRequest->reInitCurlHandle();
$this->pushRequestToQueue($completeRequest);
$ignoreNotification = true;
}
}
}
if (!$ignoreNotification) {
$this->notifyRequestComplete($completeRequest);
}
}
} while (!$this->isStopped && ($this->activeRequests || $this->queue->count()));
} catch (Exception $exception) {
}
$this->isActive = false;
if ($curlHandle && is_resource($curlHandle)) {
curl_multi_close($curlHandle);
}
if (!empty($exception)) {
throw $exception;
}
/** @noinspection PhpUndefinedMethodInspection */
$this->callbacks->onComplete($this);
}
/**
* {@inheritdoc}
*/
public function count()
{
return $this->exceptional(function () {
return $this->queue->count();
});
}
/**
* {@inheritdoc}
*/
public function count()
{
return $this->queue->count();
}
