249         $socket = null;
252             $socket = self::$connections[$connectionId];
254         if (is_null($socket) || feof($socket)) {
257             $socket = @fsockopen($server, $port, $errno, $errstr, $this->timeout);
258             if (!$socket) {
266                 if ($this->ssltunnel($socket, $request_url)) {
275                 fclose($socket);
281                 self::$connections[$connectionId] = $socket;
298             stream_set_blocking($socket, 0);
308             $this->sendData($socket, $request, 'request');
313                 $r_line = $this->readLine($socket, 'headers');
362                     fclose($socket);
405 …             while (preg_match('/^[a-zA-Z0-9]?$/', $byte = $this->readData($socket, 1, 'chunk'))) {
411                     $this->readLine($socket, 'chunk');     // readtrailing \n
423                         $r_body .= $this->readData($socket, $chunk_size, 'chunk');
424                         $this->readData($socket, 2, 'chunk'); // read trailing \r\n
448 …            $r_body = $this->readData($socket, $length, 'response (content-length limited)', true);
450 …$r_body = $this->readData($socket, $this->max_bodysize + 1, 'response (content-length limited)', t…
455                 while (!feof($socket)) {
456                     $r_body .= $this->readData($socket, 4096, 'response (unlimited)', true);
475             fclose($socket);
484             fclose($socket);
518     protected function ssltunnel(&$socket, &$requesturl)  argument
535         $this->sendData($socket, $request, 'SSL Tunnel CONNECT');
540             $r_line = $this->readLine($socket, 'headers');
547             stream_context_set_option($socket, 'ssl', 'peer_name', $requestinfo['host']);
558             if (@stream_socket_enable_crypto($socket, true, $cryptoMethod)) {
576      * @param resource $socket An open socket handle
583     protected function sendData($socket, $data, $message)  argument
593             if (feof($socket))
598             $sel_w = [$socket];
607             $nbytes = fwrite($socket, substr($data, $written, 4096));
620      * @param resource $socket An open socket handle in non-blocking mode
629     protected function readData($socket, $nbytes, $message, $ignore_eof = false)  argument
647             if (feof($socket)) {
655                 $sel_r = [$socket];
664                 $bytes = fread($socket, $to_read);
679      * @param resource $socket An open socket handle in non-blocking mode
686     protected function readLine($socket, $message)  argument
696             if (feof($socket))
700             $sel_r = [$socket];
709             $r_data = fgets($socket, 1024);