node.js + socket.io + express.js:没有连接

Question

我一直在尝试设置一个简单的socket.io示例,但它拒绝正常工作.客户端在Apache2上运行,应该通过端口3000访问node.js-server.

似乎没有任何连接,并且服务器是否实际运行似乎并不重要 - 如果在服务器($ kill xyz)上手动停止node.js-process ,我的客户端控制台不会抛出任何错误.当应用程序运行(info - socket.io started)时,会出现完全相同的结果.

服务器:

// Check dependencies & setup backend
var express = require('express');
var server = express();
var http = require('http');
var app = http.createServer(server); // somehow needed? ("Socket.IO's `listen()` method expects an `http.Server` instance as its first parameter.")
var socket = require('socket.io');
// listen @ port 3000 as definied by proxy
server.listen(3000);
// listen w/ socket.io as well
var io = socket.listen(app);

...

// socket.io
// TODO: test, added 01/03/14 
io.set('match origin protocol', true);
io.set('log level', 2);
var clients = io.sockets.clients();
io.sockets.on('connection', function(client) {
    console.log('Connection from ' + client);

    client.emit('news', {
        hello : 'world'
    });

    client.on('event', function(data) {
        console.log(data);
    });
});

客户:

<script type="text/javascript" src="./js/socket.io.js" ></script>
        <script>
            try {
                var socket = io.connect('https://localhost:3000');
                console.log(io);
                console.log('check 1', socket.socket.connected); // false

                socket.on('connect', function() {
                    console.log('check 2', socket.socket.connected); // not reached
                });

                socket.on('news', function(data) {
                    console.log(data);
                });

            } catch(error) {
                console.log(error);
            } finally {
                console.log('fin');
            }
        </script>

编辑2:

此代码有效,但仅限本地.我甚至在服务器上安装了Apache 2.4,以确保我可以访问WebSockets(我读到了2.2.x中没有的地方). 服务器:

var express = require('express');
var app = express();
var server = app.listen(3000);
var io = require('socket.io').listen(server);

app.use(express.static(__dirname + '/'));

io.sockets.on('connection', function (socket) {
  socket.emit('news', { hello: 'world' });
  socket.on('my other event', function (data) {
    console.log(data);
  });
});

客户:

<script type="text/javascript" src="js/socket.io.js" ></script> 
        <script>
            var socket = io.connect('ws://localhost:3000');
            socket.on('news', function(data) {
                console.log(data);
                socket.emit('my other event', {
                    my : 'data'
                });
            });

        </script>

Answer 1

好吧,伙计们,我终于把它搞定了.

我所做的是将我的反向代理从Apache迁移到node.js/node-http-proxy-solution.我不确定这是否真的是必须的 - 但在重新配置Apache 2.2.2甚至编译Apache 2.4.7后没有帮助,我认为它值得一试.我也切换到子域而不是子目录,因为在某些情况下,子目录似乎也会导致问题.再次,不知道这只是一个预防措施还是实际上是必要的.

然而,我非常确定相关的是如何加载socket.io.js.由于我的反向代理已经将请求转发到正确的(内部)IP,因此我必须通过TLD w/o端口或ws://访问socket.io.js以及实际的Websocket.

长话短说,这里是相关代码:

服务器

var express = require('express');
var app = express();
var server = app.listen(3000);
var io = require('socket.io').listen(server);

app.use(express.static(__dirname + '/'));

console.log('Express server started on port %s', app);

io.sockets.on('connection', function (socket) {
  socket.emit('news', { hello: 'world' });
  socket.on('my other event', function (data) {
    console.log(data);
  });
});

客户

<script src="http://mysubdomain.mydomain.com/socket.io/socket.io.js"></script>
<script>
    var socket = io.connect('http://mysubdomain.mydomain.com');
    // , {secure: true}

    socket.on('news', function(data) {
        console.log(data);
    });
</script>

代理

var fs = require('fs'), httpProxy = require('http-proxy');

// This will crash as soon as Apache isn't running or the port isn't binded elsewhere
// TODO: fix
var proxyTable = {
    'mydomain.com/subdir' : '127.0.0.1:3000',
    'mysubdomain.mydomain.com' : '127.0.0.1:3000'
};

var httpOptions = {
    hostnameOnly : false,
    router : proxyTable
};

var httpsOptions = {
    hostnameOnly : false,
    router : proxyTable,
    https : {
        key : fs.readFileSync('/path/key', 'utf8'),
        cert : fs.readFileSync('/path/cert', 'utf8')
    }
};

httpProxy.createServer(httpOptions).listen(80); 
httpProxy.createServer(httpsOptions).listen(443);

最后但并非最不重要的是,对于任何通过谷歌绊倒的人,使用的版本:

$ npm list --depth=0
myapp@0.0.0 /path/app
??? express@3.4.7
??? socket.io@0.9.16

$ npm list --depth=0
/path/proxy
??? http-proxy@0.10.4