在node.js中的TCP服务器和HTTP服务器之间创建WebSockets [英] Create WebSockets between a TCP server and HTTP server in node.js

问题描述

我已使用 Node.js 创建了一个用于监听客户端连接的 TCP服务器. 我需要在Node.js中再次将数据从 TCP服务器 传输到 HTTP服务器 ，可能是通过 Websocket ( socket.io ).

I have created a TCP server using Node.js which listens to clients connections. I need to transmit data from TCP server to HTTP server again in Node.js possibly through a Websocket (socket.io).

但是，我不知道如何创建这样的连接，以使TCP服务器能够通过Websocket将数据推送到HTTP服务器.

However, I do not know how to create such connection such that TCP server is able to push data to HTTP server through Websocket.

非常感谢.

推荐答案

我正在尝试很多事情来完成这项工作.在大多数情况下，我都是依靠 socket.io 来实现此功能的，但是它不能与TCP一起使用.

I was trying lot of things to get this work. Most of the time I was relying on socket.io to get this working, but it was just not working with TCP.

但是， net.Socket 足以满足目的.

这是它的有效示例.

TCP服务器

var net = require('net');

var HOST = 'localhost';
var PORT = 4040;

var server = net.createServer();
server.listen(PORT, HOST);

server.on('connection', function(sock) {
    console.log('CONNECTED: ' + sock.remoteAddress +':'+ sock.remotePort);
sock.write("TCP sending message : 1");
    console.log('Server listening on ' + server.address().address +':'+ 
        server.address().port);
}).listen(PORT, HOST);

HTTP服务器

var http = require('http').createServer(httpHandler),
    fs = require("fs"),
    wsock = require('socket.io').listen(http),
    tcpsock = require('net');

var http_port = 8888;

var tcp_HOST = 'localhost';
var tcp_PORT = 4040;

/**
 * http server
 */
function httpHandler (req, res) {
  fs.readFile(__dirname + '/index.html',
  function (err, data) {
    if (err) {
      res.writeHead(500);
      return res.end('Error loading index.html');
    }

    res.writeHead(200);
    res.end(data);
  });
}

http.listen(http_port);
console.info("HTTP server listening on " + http_port);

wsock.sockets.on('connection', function (socket) { 

    var tcpClient = new tcpsock.Socket();
    tcpClient.setEncoding("ascii");
    tcpClient.setKeepAlive(true);

    tcpClient.connect(tcp_PORT, tcp_HOST, function() {
        console.info('CONNECTED TO : ' + tcp_HOST + ':' + tcp_PORT);

        tcpClient.on('data', function(data) {
            console.log('DATA: ' + data);
            socket.emit("httpServer", data);
        });

        tcpClient.on('end', function(data) {
            console.log('END DATA : ' + data);
        });
    });

    socket.on('tcp-manager', function(message) {
        console.log('"tcp" : ' + message);
        return;
    });

    socket.emit("httpServer", "Initial Data");
});

浏览器客户端

<script src="/socket.io/socket.io.js"></script>
<script>
  var socket = io.connect('http://localhost');
  socket.on('httpServer', function (data) {
    console.log(data);
    document.write(data + "\r\n");
    socket.emit('tcp', "For TCP");
  });
</script>

这样，Node.js中的HTTP服务器和TCP服务器之间打开了一个套接字.

This way, there is a socket opened between HTTP server and TCP server in Node.js.

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