webrtc学习笔记六(datachannel+websocket)

阅读更多

只有datachannel的例子，websocket作为转发用，
建立连接后websocket就可以关了
server.js

//http://www.blogjava.net/linli/archive/2014/10/21/418910.html
var express = require('express'),
app = express(),
server = require('http').createServer(app);

server.listen(3000);

app.get('/', function(req, res) {
    res.sendfile(__dirname + '/webrtc.html');
});

var WebSocketServer = require('ws').Server,
wss = new WebSocketServer({server: server});
function writeObj(obj){ 
    var description = ""; 
    for(var i in obj){   
        var property=obj[i];   
        description+=i+" = "+property+"\n";  
    }   
    console.log(description); 
} 
// 存储socket的数组，这里只能有2个socket，每次测试需要重启，否则会出错
var wsc = [],
index = 1;
// 有socket连入
wss.on('connection', function(ws) {
    console.log('connection:');
    //writeObj(ws);
    // 将socket存入数组
    wsc.push(ws);
    // 记下对方socket在数组中的下标，因为这个测试程序只允许2个socket
    // 所以第一个连入的socket存入0，第二个连入的就是存入1
    // otherIndex就反着来，第一个socket的otherIndex下标为1，第二个socket的otherIndex下标为0
    var otherIndex = index--,
    desc = null;

    if (otherIndex == 1) {
        desc = 'first socket';
    } else {
        desc = 'second socket';
    }
    // 转发收到的消息
    ws.on('message', function(message) {
        var json = JSON.parse(message);
        //console.log('received (' + desc + '): ', json);
        console.log('otherIndex ---('+desc+')(' + otherIndex + '): '+json.event);
        wsc[otherIndex].send(message, function (error) {
            if (error) {
                console.log('Send message error (' + desc + '): ', error);
            }
        });
    });
});

webrtc_datachannle.html

Send
abc