Question

大家好我想知道我的代码中有什么错误，我的代码是关于socket.io和redis pub / sub这是我第一次尝试这个，希望你能帮助我们。

这是我的 index.html

<!doctype html>
<html>
    <script src="/socket.io/socket.io.js"></script>
    <script> 
        var socket = new io.Socket();
        socket.connect();

        socket.on('connection', function (socket) {
            console.log('Connected');
        });

        socket.on('disconnect', function (socket) {
            console.log('Disconnected');
        });
    </script>
    <center>
    <h1>Test Page</h1>
    </center>
</html>

这是我的 app.js

var redis = require('redis');
var app = require('http').createServer();
var io = require('socket.io').listen(app);
var client = redis.createClient();
var pub = redis.createClient();
var sub = redis.createClient();

app.listen(1234);

io.sockets.on('connection', function (socket){
    sub.on('subscribe', function (channel){
        pub.publish('Pub','Test Message 1');
        pub.publish('Pub','Test Message 2');
        pub.publish('Pub','Test Message 3');
    });
    sub.on('message', function (channel, message) {
        console.log(channel + ':' + message);
    sub.unsubscribe();
    pub.end();
    sub.end();
    });
    sub.incr('Channel Test');
    sub.incr('Pub');
});

我希望你能帮我解决这个问题。先谢谢你们。

Answer 1

我可以在您的代码中看到许多错误：

http://localhost:1234/

var client
sub永远不会订阅某些内容。您需要订阅频道
subscriber mode中的连接无法向redis发送命令：只有修改订阅集的命令才有效
sub.incr永远不会发布消息：您必须调用publish。
请勿致电pub.end()或sub.end()，因为该连接将会关闭。
不要在连接事件下添加处理程序到事件message：内存泄漏

我不知道你想做什么，但这里有更新版本：

<强>的index.html

<!doctype html>
<html>
    <script src="http://localhost:1234/socket.io/socket.io.js"></script>
    <script>
        var socket = io.connect('http://localhost:1234/');

        socket.on('connection', function (socket) {
            console.log('Connected');
        });

        socket.on('disconnect', function (socket) {
            console.log('Disconnected');
        });
    </script>
    <center>
    <h1>Test Page</h1>
    </center>
</html>

<强> app.js

var redis = require('redis');
var app = require('http').createServer();
var io = require('socket.io').listen(app);
var pub = redis.createClient();
var sub = redis.createClient();

app.listen(1234);

sub.subscribe('Pub');//subscribe to Pub channel
sub.on('message', function (channel, message) {
    console.log(channel + ':' + message);
});

io.sockets.on('connection', function (socket) {
    pub.publish('Pub', 'New Connection');
    pub.incr('Channel Test');   //increment 'Channel Test' but do not publish messages
    pub.incr('Pub');            //increment 'Pub' but do not publish messages
});

Answer 2

我没有看到你在socket.io服务器中将redis设置为store。我做的一些例子供您参考：

// start up express server along with socket.io
var express = require('express');
var server = express();
var socket = require('socket.io');
var io = socket.listen(server);

// socket.io
io.set('store', new socket.RedisStore);

// set-up connections...
io.sockets.on('connection', function(socket) {

        io.emit('an event sent to all connected clients');

        socket.on('some-event', function(rooms) {
            ...
        });

});

您可以阅读以下文档链接：

Socket.io和Redis Pub / Sub无法正常工作

2 个答案: