Question

我正在尝试按照教程https://laracasts.com/discuss/channels/general-discussion/step-by-step-guide-to-installing-socketio-and-broadcasting-events-with-laravel-51实现套接字。我让node.js运行，reddis工作，端口3000正在监听。我可以在命令行上获取控制台消息。当我尝试向客户端发射任何内容时出现问题。服务方：

var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var Redis = require('ioredis');
var redis = new Redis();
redis.subscribe('test-channel', function(err, count) {
});
redis.on('message', function(channel, message) {
    console.log('Message Recieved: ' + message);
    message = JSON.parse(message);
    io.emit(channel + ':' + message.event, message.data);
});
http.listen(3000, function(){
    console.log('Listening on Port 3000');
});

客户方：

<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.3.7/socket.io.min.js"></script>
<script>
    var socket = io('http://localhost:3000');
    //var socket = io('http://192.168.10.10:3000');
    socket.on("test-channel:App\\Events\\EventName", function(message){
        console.log("Working");
        // increase the power everytime we load test route
        $('#power').text(parseInt($('#power').text()) + parseInt(message.data.power));
    });

我尝试使用＆＃34; localStorage.debug =＆＃39; *＆＃39;;＆＃34;通过浏览器控制台进行调试。我收到以下消息：

engine.io-client:socket socket error {"type":"TransportError","description":{}} +4ms 
socket.io-client:manager connect_error +4ms 
socket.io-client:manager reconnect attempt error +1ms 
socket.io-client:manager will wait 5000ms before reconnect attempt +0ms 
engine.io-client:socket socket close with reason: "transport error" +1ms 
engine.io-client:polling transport not open - deferring close +1ms 
socket.io-client:manager attempting reconnect +5s 
socket.io-client:manager readyState closed +1ms

我尝试了所有可用的示例，我也尝试了socket.io网站上的基本示例，但没有任何作用。任何帮助表示赞赏。感谢

经过几天的挖掘后，我发现socket.io在localhost上运行得很好，但是从extrernal域无效。我也试图改变

var socket = io('http://localhost:3000');

到

var socket = io('http://serverip:3000');

但它没有帮助。 Chrome浏览器给了我错误：

GET http://serverip:3000/socket.io/?EIO=3&transport=polling&t=LDrVJCA Request.create @ socket.io.min.js:1Request @ socket.io.min.js:1XHR.request @ socket.io.min.js:1XHR.doPoll @ socket.io.min.js:1Polling.poll @ socket.io.min.js:1Polling.doOpen @ socket.io.min.js:1Transport.open @ socket.io.min.js:1Socket.open @ socket.io.min.js:1Socket @ socket.io.min.js:1Socket @ socket.io.min.js:1Manager.open.Manager.connect @ socket.io.min.js:2(anonymous function) @ socket.io.min.js:3
feedTest:1 XMLHttpRequest cannot load http://serverip:3000/socket.io/?EIO=3&transport=polling&t=LDrVJCA. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://example.com' is therefore not allowed access. The response had HTTP status code 502.

我真的很感激任何帮助。感谢

Answer 1

这是因为CORS

您可以使用 jsonp 来避免它：

    $.ajax({
       type: "POST",
       dataType: 'jsonp',
       ...... etc ....
     })

修改

对于socket io，请执行以下操作：

var socket = io('http://localhost:3000'); socket.set("origins","*");

修改

var socket = io('http://localhost:3000',{origins:'localhost:* http://localhost:* http://www.localhost:*'});

或

var socket = io('http://localhost:3000',{origins:"*"});

Answer 2

在laracasts.com的帮助下，我设法解决了这个问题。 3000港口因宣传而关闭，这就是为什么它只适用于localhost。感谢alexey试图提供帮助。

socket.io无法在客户端工作（传输错误）

2 个答案: