/**
* Read a FastCGI Packet
*
* @param Integer $timeoutMs
* @return array|null
* @throws CommunicationException
* @throws TimedOutException
*/
protected function readPacket($timeoutMs)
{
$s = [$this->sock];
$a = [];
socket_select($s, $a, $a, floor($timeoutMs / 1000), $timeoutMs % 1000 * 1000);
$packet = socket_read($this->sock, self::HEADER_LEN);
if ($packet === false) {
$errNo = socket_last_error($this->sock);
if ($errNo == 110) {
// ETIMEDOUT from http://php.net/manual/en/function.socket-last-error.php
throw new TimedOutException('Failed reading socket');
}
//TODO: Determine way to check if FPM is blocking the client
/* Not relevant for socket_create() but very interesting...
$info = stream_get_meta_data($this->_sock);
if ($info['unread_bytes'] == 0 && $info['blocked'] && $info['eof']) {
throw new CommunicationException('Not in white list. Check listen.allowed_clients.');
}*/
throw CommunicationException::socketRead($this->sock);
}
if (!$packet) {
return null;
}
$resp = $this->decodePacketHeader($packet);
$resp['content'] = '';
if ($resp['contentLength']) {
$len = $resp['contentLength'];
while ($len && ($buf = socket_read($this->sock, $len))) {
$len -= strlen($buf);
$resp['content'] .= $buf;
}
}
if ($resp['paddingLength']) {
/*$buf = */
socket_read($this->sock, $resp['paddingLength']);
// throw-away padding...
}
return $resp;
}
/**
* Read a FastCGI Packet
*
* @throws CommunicationException
* @return array
*/
private function readPacket()
{
$packet = @socket_read($this->sock, self::HEADER_LEN);
if ($packet === false) {
throw CommunicationException::socketRead($this->sock);
}
$resp = $this->decodePacketHeader($packet);
if ($len = $resp['contentLength'] + $resp['paddingLength']) {
$content = @socket_read($this->sock, $len);
if ($content === false) {
throw CommunicationException::socketRead($this->sock);
}
$resp['content'] = substr($content, 0, $resp['contentLength']);
} else {
$resp['content'] = '';
}
return $resp;
}
