Question

我使用socket.io运行了一个websocket服务器：

var http = require('http'),
fs = require('fs'),
// NEVER use a Sync function except at start-up!
index = fs.readFileSync(__dirname + '/index.html');

// Send index.html to all requests
var app = http.createServer(function(req, res) {
    res.writeHead(200, {'Content-Type': 'text/html'});
    res.end(index);
});

// Socket.io server listens to our app
var io = require('socket.io').listen(app);

// Send current time to all connected clients
function sendTime() {
   io.emit('time', { time: new Date().toJSON() });
}

// Send current time every 10 secs
setInterval(sendTime, 10000);

// Emit welcome message on connection
io.on('connection', function(socket) {
    // Use socket to communicate with this particular client only, sending it it's own id
    socket.emit('welcome', { message: 'Welcome!', id: socket.id });

    socket.on('i am client', console.log);
});

app.listen(3000);

这个服务器可以使用简单的socket-io客户端工作：

var socket = require('socket.io-client')('http://127.0.0.1:1337');
socket.on('connect', function(){});
socket.on('time', function(data){console.log(data);});
socket.on('disconnect', function(){});

我尝试使用cURL发送连接请求，但失败了：

curl --verbose -i -N -H "Upgrade: websocket" -H "Connection: Upgrade" -H "Host: 127.0.0.1" -H "Origin: http://127.0.0.1" http://127.0.0.1:3000/

* Connected to 127.0.0.1 (127.0.0.1) port 3000 (#0)
> GET /socket.io HTTP/1.1
> User-Agent: curl/7.37.1
> Accept: */*
> Upgrade: websocket
> Connection: Upgrade
> Host: 127.0.0.1
> Origin: http://127.0.0.1
> 
* Empty reply from server
* Connection #0 to host 127.0.0.1 left intact
curl: (52) Empty reply from server

如果我删除了＆＃34;升级：websocket＆＃34;，那么服务器将发回html页面。＆＃34;升级：websocket＆＃34;应该告诉服务器将HTTP连接升级到websocket连接。为什么它没有用？

Websocket服务器返回空回复

0 个答案: