我通过node.js使用TCP连接来连接到Windows中的某个端口,但我希望在用户注销之前建立连接。 换句话说,我想在node.js中添加TCP连接作为会话属性,这样只要用户的会话处于活动状态,它就会持续。
我试过这个,但它不起作用。
代码:
var express = require('express');
var authRouter = express.Router();
var createTCPConnection = function () {
var net = require('net');
var HOST = '127.0.0.1';
var PORT = 6969;
var client = new net.Socket();
client.connect(PORT, HOST, function() {
console.log('CONNECTED TO: ' + HOST + ':' + PORT);
// Write a message to the socket as soon as the client is connected, the server will receive it as message from the client
client.write('I am Chuck1 Norris!');
});
// Add a 'data' event handler for the client socket
// data is what the server sent to this socket
client.on('data', function(data) {
// Close the client socket completely
//client.destroy();
});
// Add a 'close' event handler for the client socket
client.on('close', function() {
console.log('Connection closed');
});
return client;
};
authRouter.route('/').get(function(req, res) {
var sess = req.session;
if (sess.username) {
//If Session has username attribute, it is a valid session
res.render('dashboard', {
title : 'Welcome To Operator Screen',
username : sess.username
});
if(sess.tcpClient === undefined) {
console.log('Establishing TcpClient');
sess.tcpClient = createTCPConnection();
} else {
console.log('TcpClient already established');
}
} else {
//Invalid/expired session, redirect to homepage
res.redirect('/logout');
}
});
module.exports = authRouter;