<?phpnamespace Common\Library;// ini_set('display_errors', 1);// error_reporting(E_ALL);/** * Very basic websocket client. * Supporting draft hybi-10. * * @author Simon Samtleben <web@lemmingzshadow.net> * @version 2011-10-18 */class WebSocketClient{ private $_host; private $_port; private $_path; private $_origin; private $_Socket = null; private $_connected = false; public function __construct() { } public function __destruct() { $this->disconnect(); } public function sendData($data, $type = 'text', $masked = true) { if($this->_connected === false) { trigger_error("Not connected", E_USER_WARNING); return false; } if( !is_string($data)) { trigger_error("Not a string data was given.", E_USER_WARNING); return false; } if (strlen($data) == 0) { return false; } $res = @fwrite($this->_Socket, $this->_hybi10Encode($data, $type, $masked)); if($res === 0 || $res === false) { return false; } $buffer = ' '; while($buffer !== '') { $buffer = fread($this->_Socket, 512); } return true; } public function connect($host, $port, $path, $origin = false) { $this->_host = $host; $this->_port = $port; $this->_path = $path; $this->_origin = $origin; $key = base64_encode($this->_generateRandomString(16, false, true)); $header = "GET " . $path . " HTTP/1.1\r\n"; $header.= "Host: ".$host.":".$port. "\r\n"; $header.= "Upgrade: websocket\r\n"; $header.= "Connection: Upgrade\r\n"; //$header.= "Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits\r\n"; $header.= "Sec-WebSocket-Key: " . $key . "\r\n"; if($origin !== false) { $header.= "Sec-WebSocket-Origin: " . $origin . "\r\n"; } $header.= "Sec-WebSocket-Version: 13\r\n\r\n"; $this->_Socket = fsockopen($host, $port, $errno, $errstr, 2); socket_set_timeout($this->_Socket, 2, 10000); //socket_write($this->_Socket, $header); $res = @fwrite($this->_Socket, $header); if( $res === false ){ echo "fwrite false \n"; } $response = @fread($this->_Socket, 1500); //$response = socket_read($this->_Socket); preg_match('#Sec-WebSocket-Accept:\s(.*)$#mU', $response, $matches); if ($matches) { $keyAccept = trim($matches[1]); $expectedResonse = base64_encode(pack('H*', sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11'))); $this->_connected = ($keyAccept === $expectedResonse) ? true : false; } return $this->_connected; } public function checkConnection() { $this->_connected = false; // send ping: $data = 'ping?'; @fwrite($this->_Socket, $this->_hybi10Encode($data, 'ping', true)); $response = @fread($this->_Socket, 300); if(empty($response)) { return false; } $response = $this->_hybi10Decode($response); if(!is_array($response)) { return false; } if(!isset($response['type']) || $response['type'] !== 'pong') { return false; } $this->_connected = true; return true; } public function disconnect() { $this->_connected = false; is_resource($this->_Socket) and fclose($this->_Socket); } public function reconnect() { sleep(10); $this->_connected = false; fclose($this->_Socket); $this->connect($this->_host, $this->_port, $this->_path, $this->_origin); } private function _generateRandomString($length = 10, $addSpaces = true, $addNumbers = true) { $characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"ยง$%&/()=[]{}'; $useChars = array(); // select some random chars: for($i = 0; $i < $length; $i++) { $useChars[] = $characters[mt_rand(0, strlen($characters)-1)]; } // add spaces and numbers: if($addSpaces === true) { array_push($useChars, ' ', ' ', ' ', ' ', ' ', ' '); } if($addNumbers === true) { array_push($useChars, rand(0,9), rand(0,9), rand(0,9)); } shuffle($useChars); $randomString = trim(implode('', $useChars)); $randomString = substr($randomString, 0, $length); return $randomString; } private function _hybi10Encode($payload, $type = 'text', $masked = true) { $frameHead = array(); $frame = ''; $payloadLength = strlen($payload); switch($type) { case 'text': // first byte indicates FIN, Text-Frame (10000001): $frameHead[0] = 129; break; case 'close': // first byte indicates FIN, Close Frame(10001000): $frameHead[0] = 136; break; case 'ping': // first byte indicates FIN, Ping frame (10001001): $frameHead[0] = 137; break; case 'pong': // first byte indicates FIN, Pong frame (10001010): $frameHead[0] = 138; break; } // set mask and payload length (using 1, 3 or 9 bytes) if($payloadLength > 65535) { $payloadLengthBin = str_split(sprintf('%064b', $payloadLength), 8); $frameHead[1] = ($masked === true) ? 255 : 127; for($i = 0; $i < 8; $i++) { $frameHead[$i+2] = bindec($payloadLengthBin[$i]); } // most significant bit MUST be 0 (close connection if frame too big) if($frameHead[2] > 127) { $this->close(1004); return false; } } elseif($payloadLength > 125) { $payloadLengthBin = str_split(sprintf('%016b', $payloadLength), 8); $frameHead[1] = ($masked === true) ? 254 : 126; $frameHead[2] = bindec($payloadLengthBin[0]); $frameHead[3] = bindec($payloadLengthBin[1]); } else { $frameHead[1] = ($masked === true) ? $payloadLength + 128 : $payloadLength; } // convert frame-head to string: foreach(array_keys($frameHead) as $i) { $frameHead[$i] = chr($frameHead[$i]); } if($masked === true) { // generate a random mask: $mask = array(); for($i = 0; $i < 4; $i++) { $mask[$i] = chr(rand(0, 255)); } $frameHead = array_merge($frameHead, $mask); } $frame = implode('', $frameHead); // append payload to frame: $framePayload = array(); for($i = 0; $i < $payloadLength; $i++) { $frame .= ($masked === true) ? $payload[$i] ^ $mask[$i % 4] : $payload[$i]; } return $frame; } private function _hybi10Decode($data) { $payloadLength = ''; $mask = ''; $unmaskedPayload = ''; $decodedData = array(); // estimate frame type: $firstByteBinary = sprintf('%08b', ord($data[0])); $secondByteBinary = sprintf('%08b', ord($data[1])); $opcode = bindec(substr($firstByteBinary, 4, 4)); $isMasked = ($secondByteBinary[0] == '1') ? true : false; $payloadLength = ord($data[1]) & 127; switch($opcode) { // text frame: case 1: $decodedData['type'] = 'text'; break; case 2: $decodedData['type'] = 'binary'; break; // connection close frame: case 8: $decodedData['type'] = 'close'; break; // ping frame: case 9: $decodedData['type'] = 'ping'; break; // pong frame: case 10: $decodedData['type'] = 'pong'; break; default: return false; break; } if($payloadLength === 126) { $mask = substr($data, 4, 4); $payloadOffset = 8; $dataLength = bindec(sprintf('%08b', ord($data[2])) . sprintf('%08b', ord($data[3]))) + $payloadOffset; } elseif($payloadLength === 127) { $mask = substr($data, 10, 4); $payloadOffset = 14; $tmp = ''; for($i = 0; $i < 8; $i++) { $tmp .= sprintf('%08b', ord($data[$i+2])); } $dataLength = bindec($tmp) + $payloadOffset; unset($tmp); } else { $mask = substr($data, 2, 4); $payloadOffset = 6; $dataLength = $payloadLength + $payloadOffset; } if($isMasked === true) { for($i = $payloadOffset; $i < $dataLength; $i++) { $j = $i - $payloadOffset; if(isset($data[$i])) { $unmaskedPayload .= $data[$i] ^ $mask[$j % 4]; } } $decodedData['payload'] = $unmaskedPayload; } else { $payloadOffset = $payloadOffset - 4; $decodedData['payload'] = substr($data, $payloadOffset); } return $decodedData; }}使用示例：
// 使用 WebSocket 通知客户端 $client = new \Common\Library\WebSocketClient(); $client->connect($_SERVER['HTTP_HOST'], 943, '/'); $payload = json_encode(array( 'code' => 'xxx', 'id' => '1' )); $rs = $client->sendData($payload); if( $rs !== true ){ echo "sendData error...\n"; }else{ echo "ok\n"; }来自： http://my.oschina.net/skq/blog/552923
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
