262         $socket = null;
265             $socket = self::$connections[$connectionId];
267         if (is_null($socket) || feof($socket)) {
270             $socket = @fsockopen($server,$port,$errno, $errstr, $this->timeout);
271             if (!$socket){
279                 if($this->_ssltunnel($socket, $request_url)){
288                 fclose($socket);
294                 self::$connections[$connectionId] = $socket;
311             stream_set_blocking($socket, 0);
321             $this->_sendData($socket, $request, 'request');
326                 $r_line = $this->_readLine($socket, 'headers');
376                     fclose($socket);
407 …                  while (preg_match('/^[a-zA-Z0-9]?$/',$byte=$this->_readData($socket,1,'chunk'))){
413                     $this->_readLine($socket, 'chunk');     // readtrailing \n
425                         $r_body .= $this->_readData($socket, $chunk_size, 'chunk');
426                         $this->_readData($socket, 2, 'chunk'); // read trailing \r\n
443 …           $r_body = $this->_readData($socket, $length, 'response (content-length limited)', true);
445 …$r_body = $this->_readData($socket, $this->max_bodysize, 'response (content-length limited)', true…
450                 while (!feof($socket)) {
451                     $r_body .= $this->_readData($socket, 4096, 'response (unlimited)', true);
471             fclose($socket);
478             fclose($socket);
510     function _ssltunnel(&$socket, &$requesturl){  argument
525         $this->_sendData($socket, $request, 'SSL Tunnel CONNECT');
530             $r_line = $this->_readLine($socket, 'headers');
537             stream_context_set_option($socket, 'ssl', 'peer_name', $requestinfo['host']);
548             if (@stream_socket_enable_crypto($socket, true, $cryptoMethod)) {
563      * @param  resource $socket     An open socket handle
570     function _sendData($socket, $data, $message) {  argument
579             if(feof($socket))
584             $sel_w = array($socket);
593             $nbytes = fwrite($socket, substr($data,$written,4096));
606      * @param  resource $socket     An open socket handle in non-blocking mode
615     function _readData($socket, $nbytes, $message, $ignore_eof = false) {  argument
626             if(feof($socket)) {
634                 $sel_r = array($socket);
643                 $bytes = fread($socket, $to_read);
658      * @param  resource $socket     An open socket handle in non-blocking mode
665     function _readLine($socket, $message) {  argument
673             if(feof($socket))
677             $sel_r = array($socket);
686             $r_data = fgets($socket, 1024);