Websocket Javascript的多个处理程序

Question

那可能我们可以为同一个webcocket会话提供多个处理程序(onmessage方法)吗？在下面的代码中,只有一个onmessage方法来处理来自客户端的消息.但是,我们是否有可能为同一个websocket会话提供多个onmessage处理程序方法？

码:

    var url = window.location.href;
    var arr = url.split("/");
    var redirectURL = arr[0] + "//" + arr[2];
    var wsURL = redirectURL.replace('http','ws');
    var ws = new WebSocket(wsURL+'/abc');
    ws.onopen = function(event) {
        var data = '{"userId":' + sessionStorage.getItem('userID') + '}';
        ws.send((data));
    };

    ws.onmessage = function(event) {
        var msg = event.data;
        console.info('Push Message : ' + msg);
        Ext.toast({
             html: msg,
             title: 'Alert',
             align: 'br',
             autoShow : true
        });

    };

Answer 1

该WebSocket对象支持.addEventListener()的话,你可以这样做:

var url = window.location.href;
var arr = url.split("/");
var redirectURL = arr[0] + "//" + arr[2];
var wsURL = redirectURL.replace('http','ws');
var ws = new WebSocket(wsURL+'/abc');
ws.addEventListener("open", function(event) {
    var data = '{"userId":' + sessionStorage.getItem('userID') + '}';
    ws.send((data));
});

ws.addEventListener("message", function(event) {
    var msg = event.data;
    console.info('Push Message : ' + msg);
    Ext.toast({
         html: msg,
         title: 'Alert',
         align: 'br',
         autoShow : true
    });

});

// some other listener for incoming messages
ws.addEventListener("message", function(event) {
    // code here
});