gitmathub / simple-js-server

Simple server in JavaScript for leaning proposes

Simple Server

Showcase for client server communication.

Instalation and Start

npm i
npm run start

Now the minimalistic server is running on port 8888. It accepts numbers from a client and sums them up.

Server Code

var net = require('net')
var sum = 0

var server = net.createServer(socket => {
  socket.on('data', summand => {
    if (!parseInt(summand)) summand = 0
    sum = sum + parseInt(summand)
    socket.write('sum: ' + sum + '\n')
  })
})
server.listen(8888)

Client

When the server is running (npm run start) a client can send any string. If it's a number then server calculates the sum of all numbers sent.

Example: keyboard in put is: 3 then 4 then 8 and finally a.

$ nc localhost 8888
3
sum: 3
4
sum: 7
1
sum: 8
a
sum: 8