ارسال پیام بین کلاینت و سرور ( چت ساده )

node.js

Chat server and client

می خواهیم برنامه ای بنویسیم که متن هایی را از کاربر ( ورودی ) گرفته و به سرور ارسال کند همین طور از سرور میتوان پاسخ کلاینت را ارسال کرد

 

server.js

var net = require('net');

var HOST = '127.0.0.1';
var PORT = 6969;

// Create a server instance, and chain the listen function to it
// The function passed to net.createServer() becomes the event handler for the 'connection' event
// The sock object the callback function receives UNIQUE for each connection
net.createServer(function(sock) {

    // We have a connection - a socket object is assigned to the connection automatically
    console.log('CONNECTED: ' + sock.remoteAddress +':'+ sock.remotePort);

    // Add a 'data' event handler to this instance of socket
    sock.on('data', function(data) {

        console.log('DATA ' + sock.remoteAddress + ': ' + data);
        // Write the data back to the socket, the client will receive it as data from the server

        // Ersal matn az server ber client
        const readline = require('readline');

        const rl = readline.createInterface({
            input: process.stdin,
            output: process.stdout
        });

        rl.question('Your Text ? ', (answer) => {
            // TODO: Log the answer in a database
           // console.log('Your name is:', answer);
        sock.write('Server :"' + answer + '"');
        rl.close();
    });


    });

    // Add a 'close' event handler to this instance of socket
    sock.on('close', function(data) {
        console.log('CLOSED: ' + sock.remoteAddress +' '+ sock.remotePort);
    });

}).listen(PORT, HOST);

console.log('Server listening on ' + HOST +':'+ PORT);

 

client.js

 

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 Benyamin');
    const readline = require('readline');

    const rl = readline.createInterface({
        input: process.stdin,
        output: process.stdout
    });

    rl.question('Your Text : ', (answer) => {
        // TODO: Log the answer in a database
      //  console.log('Your name is:', answer);
        client.write(answer);

    rl.close();
});

});

// Add a 'data' event handler for the client socket
// data is what the server sent to this socket
client.on('data', function(data) {

    console.log('DATA: ' + data);
    // Close the client socket completely
  //  client.destroy();

    const readline = require('readline');

    const rl = readline.createInterface({
        input: process.stdin,
        output: process.stdout
    });

    rl.question('Your Text : ', (answer) => {
        // TODO: Log the answer in a database
        //  console.log('Your name is:', answer);
        client.write(answer);

    rl.close();
});
});

// Add a 'close' event handler for the client socket
client.on('close', function() {
    console.log('Connection closed');
});