how to send response to a specific ip address in nodejs or javascript?

Question

how to send response to a specific ip address in nodejs or javascript?

I am working with nodejs, and i want to send response from server to a specific ip address but server will be able to listen request from any ip address. Please suggest me how to do this. thanks in advance.

javascript
node.js

Answer 1

Your question is not very clear and also didn't give any code example of what you have tried. Anyway here is a basic code showing how to get the ipaddress of the client that requested the server and send a response back based in the ip address:

var http = require('http');

var s = http.createServer(function(req, res){
     var ipAddress = req.connection.remoteAddress;
     //check if user is accessing from localhost ip
     if(ipAddress=="127.0.0.1"){
        res.writeHead(200, {'content-type':'text/plain'})
        res.end('Hello localhost');     
     } else {
        res.writeHead(200, {'content-type':'text/plain'})
        res.end('Hello '+ipAddress);
     }
});
s.listen(8000);