/**
* Potentially open a socket and sent an HTTP request back to the server
* to run a specified number of jobs. This registers a callback to cleanup
* the socket once it's done.
*/
protected function triggerJobs()
{
global $wgJobRunRate, $wgServer, $wgRunJobsAsync;
if ($wgJobRunRate <= 0 || wfReadOnly()) {
return;
} elseif ($this->getTitle()->isSpecial('RunJobs')) {
return;
// recursion guard
}
$section = new ProfileSection(__METHOD__);
if ($wgJobRunRate < 1) {
$max = mt_getrandmax();
if (mt_rand(0, $max) > $max * $wgJobRunRate) {
return;
// the higher $wgJobRunRate, the less likely we return here
}
$n = 1;
} else {
$n = intval($wgJobRunRate);
}
if (!$wgRunJobsAsync) {
// If running jobs asynchronously has been disabled, run the job here
// while the user waits
SpecialRunJobs::executeJobs($n);
return;
}
if (!JobQueueGroup::singleton()->queuesHaveJobs(JobQueueGroup::TYPE_DEFAULT)) {
return;
// do not send request if there are probably no jobs
}
$query = array('title' => 'Special:RunJobs', 'tasks' => 'jobs', 'maxjobs' => $n, 'sigexpiry' => time() + 5);
$query['signature'] = SpecialRunJobs::getQuerySignature($query);
$errno = $errstr = null;
$info = wfParseUrl($wgServer);
wfSuppressWarnings();
$sock = fsockopen($info['host'], isset($info['port']) ? $info['port'] : 80, $errno, $errstr, 0.1);
wfRestoreWarnings();
if (!$sock) {
wfDebugLog('runJobs', "Failed to start cron API (socket error {$errno}): {$errstr}\n");
// Fall back to running the job here while the user waits
SpecialRunJobs::executeJobs($n);
return;
}
$url = wfAppendQuery(wfScript('index'), $query);
$req = "POST {$url} HTTP/1.1\r\nHost: {$info['host']}\r\nConnection: Close\r\nContent-Length: 0\r\n\r\n";
wfDebugLog('runJobs', "Running {$n} job(s) via '{$url}'\n");
// Send a cron API request to be performed in the background.
// Give up if this takes too long to send (which should be rare).
stream_set_timeout($sock, 1);
$bytes = fwrite($sock, $req);
if ($bytes !== strlen($req)) {
wfDebugLog('runJobs', "Failed to start cron API (socket write error)\n");
} else {
// Do not wait for the response (the script should handle client aborts).
// Make sure that we don't close before that script reaches ignore_user_abort().
$status = fgets($sock);
if (!preg_match('#^HTTP/\\d\\.\\d 202 #', $status)) {
wfDebugLog('runJobs', "Failed to start cron API: received '{$status}'\n");
}
}
fclose($sock);
}
