swoole websocket service

The websocket protocol is a new network protocol based on TCP, which realizes full-duplex communication between the browser and the server - allowing the server to actively send information to the client

Why use websocket

HTTP communication can only be initiated by the client, such as ajax polling.

websocket features:

1. Built on the TCP protocol

2. Small performance overhead and efficient communication

3. The client can communicate with any server

4. The protocol identifier WS WSS is a concept with HTTPS

5. The persistent network communication protocol server actively pushes messages to the client

<?php
 $server = new swoole_websocket_server( "0.0.0.0" , 9504 ) ;
 // Set the WebSocket sub-protocol. After setting, the Http header of the handshake response will add Sec-WebSocket-Protocol: {$websocket_subprotocol}
 //$server->set([
 // 'websocket_subprotocol' => 'chat',
 //]);
 //---- ------------
 // Listen to websocket connection open event
 //$server->on('open', function (swoole_websocket_server $server, $request) {
 // echo "server: handshake success with fd{$request->fd}\n";
 //});
 // You can also use the following syntax
 $server ->


'open' , 'onOpen' ) ;
 function onOpen ( $server , $request ){
 // Which client
 print_r( $request -> fd ) ;
 }
 //-------------- -
 // Listen to message events
 $server -> on ( 'message' , function (swoole_websocket_server $server , $frame ) {
 echo "receive from { $frame -> fd } : { $frame -> data        



    } ,opcode: { $frame -> opcode } ,fin: { $frame -> finish } \n " ;
 // Push data to the websocket client connection
 // $fd ID of the client connection , if the specified $fd corresponds to If the TCP connection is not a websocket client, it will fail
 to send //$data the data content to be sent
 //$opcode , specify the format of the sent data content, the default is text. To send binary content $opcode parameter needs to be set to WEBSOCKET_OPCODE_BINARY
     // Send Returns true on success, false
 when sending fails                    // function swoole_websocket_server->push(int $fd, string $data, int $opcode = 1, bool $finish = true);
 $server -> push ( $frame -> fd , "this is server" ) ;
 }) ;
 // You can also write
 $server -> on ( 'close' , function ( $ser , $fd ) {
 echo "client { $fd } closed \n " ;
 }) ;
    
    

//$server->on('request', function (swoole_http_request $request, swoole_http_response $response) {
//    global $server;//调用外部的server
//    // $server->connections 遍历所有websocket连接用户的fd，给所有用户推送
//    foreach ($server->connections as $fd) {
//        $server->push($fd, $request->get['message']);
//    }
//});
$server->start();

//class WebsocketTest {
//    public $server;
//    public function __construct() {
//        $this->server = new swoole_websocket_server("0.0.0.0", 9501);
//        $this->server->on('open', function (swoole_websocket_server $server, $request) {
//            echo "server: handshake success with fd{$request->fd}\n";
//        });
//        $this->server->on('message', function (swoole_websocket_server $server, $frame) {
//            echo "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}\n";
//            $server->push($frame->fd, "this is server");
//        });
//        $this->server->on('close', function ($ser, $fd) {
//            echo "client {$fd} closed\n";
//        });
//        $this->server->on('request', function ($request, $response) {
//            // 接收http请求从get获取message参数的值，给用户推送
//            // $this->server->connections 遍历所有websocket连接用户的fd，给所有用户推送
//            foreach ($this->server->connections as $fd) {
//                $this->server->push($fd, $request->get['message']);
//            }
//        });
//        $this->server->start();
//    }
//}
//new WebsocketTest();

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>ws test</h1>
<script>
    var wsUrl = 'ws://test.swoole.com:9504';
    var webSocket = new WebSocket(wsUrl);
    //实例对象的onopen的属性
    webSocket.onopen = function (p1) {
        console.log('con-swoole-succ');
    }

    //实例化 onmessage
    webSocket.onmessage = function (p1) {
        console.log('ws-server-return-data:'+ p1.data);
    }

    //onclose
    webSocket.onclose = function (p1) {
        console.log('close');
    }

    webSocket.onerror = function (p1) {
        console.log('error-data:'+ p1.data);
    }
</script>
</body>
</html>

swoole websocket service

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