老雷socket编程之websocket实现
发布时间：2022-08-02 14:12:39 所属栏目：PHP教程 来源：互联网
导读：老雷socket编程之websocket实现 我们主要实现私聊和群聊两个功能,要在web端实现想微信QQ那样的即时通讯的功能，我们需要了解一下websocket。 websocket是一种可以双向通讯的长连接协议，http是获取完数据就关闭，websocket则可以一直连接，就像铺了一条管道
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老雷socket编程之websocket实现 我们主要实现私聊和群聊两个功能,要在web端实现想微信QQ那样的即时通讯的功能，我们需要了解一下websocket。 websocket是一种可以双向通讯的长连接协议，http是获取完数据就关闭，websocket则可以一直连接，就像铺了一条管道一样，水可以一直流着。 一、websocket前端 复制代码 var ws = new WebSocket("ws://127.0.0.1.com:8282"); ws.onopen=function(){ var msg = JSON.stringify({ type: "login", content: "login" }); ws.send(msg); } ws.onmessage = function (e){ console.log(e); //服务器发送的内容 var res = JSON.parse(e.data); switch(res.type){ case "login": break; case "pm": break; case "groupPm": break; } } ws.onerror=function (e){ console.log(e); } ws.onclose=function (e){ console.log(e); } 复制代码 二、服务端 客户端发送http请求，带上Sec-WebSocket-Key， 服务端握手 加密key,发送给客户端。 双方能进行交流。 发送接收消息需要进行打包encode 解包decode。 复制代码 <?php class SocketService { public $host="tcp://0.0.0.0:8000"; private $address; private $port; private $_sockets; public $clients; public $maxid=1000; public function __construct($address = '', $port='') { if(!empty($address)){ $this->address = $address; } if(!empty($port)) { $this->port = $port; } } public function onConnect($client_id){ echo "Client client_id:{$client_id} n"; } public function onMessage($client_id,$msg){ //发给所有的 foreach($this->clients as $kk=>$cc){ if($kk>0){ $this->send($cc, $msg); } } } public function onClose($client_id){ echo "$client_id close n"; } public function service(){ //获取tcp协议号码。 $tcp = getprotobyname("tcp"); $sock = stream_socket_server($this->host, $errno, $errstr);; if(!$sock) { throw new Exception("failed to create socket: ".socket_strerror($sock)."n"); } stream_set_blocking($sock,0); $this->_sockets = $sock; echo "listen on $this->address $this->host ... n"; } public function run(){ $this->service(); $this->clients[] = $this->_sockets; while (true){ $changes = $this->clients; //$write = NULL; //$except = NULL; stream_select($changes, $write, $except, NULL); foreach ($changes as $key => $_sock){ if($this->_sockets == $_sock){ //判断是不是新接入的socket if(($newClient = stream_socket_accept($_sock)) === false){ unset($this->clients[$key]); continue; } $line = trim(stream_socket_recvfrom($newClient, 1024)); //握手 $this->handshaking($newClient, $line); $this->maxid++; $this->clients[$this->maxid] = $newClient; $this->onConnect($this->maxid); } else { $res=@stream_socket_recvfrom($_sock, 2048); //客户端主动关闭 if(strlen($res) < 9) { stream_socket_shutdown($this->clients[$key],STREAM_SHUT_RDWR); unset($this->clients[$key]); $this->onClose($key); }else{ //解密 $msg = $this->decode($res); $this->onMessage($key,$msg); } } } } } /** * 握手处理 * @param $newClient socket * @return int 接收到的信息 */ public function handshaking($newClient, $line){ $headers = array(); $lines = preg_split("/rn/", $line); foreach($lines as $line) { $line = chop($line); if(preg_match('/A(S+): (.*)z/', $line, $matches)) { $headers[$matches[1]] = $matches[2]; } } $secKey = $headers['Sec-WebSocket-Key']; $secAccept = base64_encode(pack('H*', sha1($secKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11'))); $upgrade = "HTTP/1.1 101 Web Socket Protocol Handshakern" . "Upgrade: websocketrn" . "Connection: Upgradern" . "WebSocket-Origin: $this->addressrn" . "WebSocket-Location: ws://$this->address:$this->port/websocket/websocketrn". "Sec-WebSocket-Accept:$secAcceptrnrn"; return stream_socket_sendto($newClient, $upgrade); } /** * 发送数据 * @param $newClinet 新接入的socket * @param $msg 要发送的数据 * @return int|string */ public function send($newClinet, $msg){ $msg = $this->encode($msg); stream_socket_sendto($newClinet, $msg); } /** * 解析接收数据 * @param $buffer * @return null|string */ public function decode($buffer){ $len = $masks = $data = $decoded = null; $len = ord($buffer[1]) & 127; if ($len === 126) { $masks = substr($buffer, 4, 4); $data = substr($buffer, 8); } else if ($len === 127) { $masks = substr($buffer, 10, 4); $data = substr($buffer, 14); } else { $masks = substr($buffer, 2, 4); $data = substr($buffer, 6); } for ($index = 0; $index < strlen($data); $index++) { $decoded .= $data[$index] ^ $masks[$index % 4]; } return $decoded; } /** *打包消息 **/ public function encode($buffer) { $first_byte="x81"; $len=strlen($buffer); if ($len <= 125) { $encode_buffer = $first_byte . chr($len) . $buffer; } else { if ($len <= 65535) { $encode_buffer = $first_byte . chr(126) . pack("n", $len) . $buffer; } else { $encode_buffer = $first_byte . chr(127) . pack("xxxxN", $len) . $buffer; } } return $encode_buffer; } /** * 关闭socket */ public function close(){ return socket_close($this->_sockets); } } $sock = new SocketService('127.0.0.1','9000'); $sock->run(); （编辑：三门峡站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
