254         $socket = null;
257             $socket = self::$connections[$connectionId];
259         if (is_null($socket) || feof($socket)) {
262             $socket = @fsockopen($server,$port,$errno, $errstr, $this->timeout);
263             if (!$socket){
271                 if($this->ssltunnel($socket, $request_url)){
280                 fclose($socket);
286                 self::$connections[$connectionId] = $socket;
303             stream_set_blocking($socket, 0);
313             $this->sendData($socket, $request, 'request');
318                 $r_line = $this->readLine($socket, 'headers');
368                     fclose($socket);
411                     while (preg_match('/^[a-zA-Z0-9]?$/',$byte=$this->readData($socket,1,'chunk'))){
417                     $this->readLine($socket, 'chunk');     // readtrailing \n
429                         $r_body .= $this->readData($socket, $chunk_size, 'chunk');
430                         $this->readData($socket, 2, 'chunk'); // read trailing \r\n
451 …            $r_body = $this->readData($socket, $length, 'response (content-length limited)', true);
453 …$r_body = $this->readData($socket, $this->max_bodysize+1, 'response (content-length limited)', tru…
458                 while (!feof($socket)) {
459                     $r_body .= $this->readData($socket, 4096, 'response (unlimited)', true);
479             fclose($socket);
486             fclose($socket);
518     protected function ssltunnel(&$socket, &$requesturl){  argument
533         $this->sendData($socket, $request, 'SSL Tunnel CONNECT');
538             $r_line = $this->readLine($socket, 'headers');
545             stream_context_set_option($socket, 'ssl', 'peer_name', $requestinfo['host']);
556             if (@stream_socket_enable_crypto($socket, true, $cryptoMethod)) {
573      * @param  resource $socket     An open socket handle
580     protected function sendData($socket, $data, $message) {  argument
589             if(feof($socket))
594             $sel_w = array($socket);
603             $nbytes = fwrite($socket, substr($data,$written,4096));
616      * @param  resource $socket     An open socket handle in non-blocking mode
625     protected function readData($socket, $nbytes, $message, $ignore_eof = false) {  argument
636             if(feof($socket)) {
644                 $sel_r = array($socket);
653                 $bytes = fread($socket, $to_read);
668      * @param  resource $socket     An open socket handle in non-blocking mode
675     protected function readLine($socket, $message) {  argument
683             if(feof($socket))
687             $sel_r = array($socket);
696             $r_data = fgets($socket, 1024);