node.js:将websocket代理到其他端口



我已经在node.js中编写了http代理,运行在端口80上。我只需要将socket.io流量重定向到9090端口,将标准http流量重定向到8080上的Apache。这是我的代理代码:

httpProxy = require('http-proxy');
httpProxy.createServer(function (req, res, proxy) {
    if (req.url.match(/socket.io/)) {
        proxy.proxyRequest(req, res, {
            host: 'localhost',
            port: 9090
        });
    } else {
        proxy.proxyRequest(req, res, {
            host: 'localhost',
            port: 8080
        });
    }
}).listen(80);

一切正常,但io.socket又回到了xhr轮询。

http://localhost/client.htm    - falls back to xhr-polling
file:///C:/.../client9090.htm  - still uses websocket

socket.io应用程序在端口9090上运行,client.htm连接到80,client9090.htm直接连接到9090。

它看起来像是一个节点http代理使socket.io应用程序在xhr轮询模式下工作。客户端是Chrome v.25

socket.io应用程序代码

var io = require('socket.io').listen(9090);
io.on('connection', function (socket) {
        socket.on('hi!', function (data) {
            console.log(data);
            socket.emit('news');
        });
        socket.on('ahoj', function (data) {
            console.log(data);
        });
    });

client.htm代码

<script src="http://localhost/socket.io/socket.io.js"></script>
<script>
    var chat = io.connect('http://localhost')
    chat.on('connect', function () {
        chat.emit('hi!');
    });
    chat.on('news', function () {
        chat.emit('ahoj',{a:1,b:2});
    });
</script>

client9090.htm相同,但localhost被localhost:9090 取代

正如我所说,一切都很好,唯一的问题是,节点http代理从websockets回退到xhr轮询。有人能帮忙吗?

根据https://npmjs.org/package/http-proxy,当向httpProxy.createServer((添加回调时,您必须手动代理"升级"事件,因此如下所示:

httpProxy = require('http-proxy');
// added `var server =` here
var server = httpProxy.createServer(function (req, res, proxy) {
    if (req.url.match(/socket.io/)) {
        proxy.proxyRequest(req, res, {
            host: 'localhost',
            port: 9090
        });
    } else {
        proxy.proxyRequest(req, res, {
            host: 'localhost',
            port: 8080
        });
    }
}).listen(80);
// added upgrade listener section here:
server.on('upgrade', function (req, socket, head) {
    server.proxy.proxyWebSocketRequest(req, socket, head);
});

然而,对于您上面描述的用法,您甚至不需要回调函数——您可以很容易地执行以下操作:

httpProxy = require('http-proxy');
var options = {
  pathnameOnly: true,
  router: {
    '/wiki': '127.0.0.1:8001',
    '/blog': '127.0.0.1:8002',
    '/api':  '127.0.0.1:8003'
  }
}
var proxyServer = httpProxy.createServer(options);
proxyServer.listen(80);

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