I am learning Node.js. While creating a web site, I will run the web site locally (on localhost). When it is deployed, it will run on other servers. My question is, how do I determine if a request is from localhost or not in Node? In ASP.NET, I could use Request.IsLocal. I'm trying to figure out how to do that in Node.

Thank you!

I am learning Node.js. While creating a web site, I will run the web site locally (on localhost). When it is deployed, it will run on other servers. My question is, how do I determine if a request is from localhost or not in Node? In ASP.NET, I could use Request.IsLocal. I'm trying to figure out how to do that in Node.

Thank you!

• javascript
• node.js

1 Answer 1

There's server.address() to get the server address.

And request has connection and socket objects, as both might hold remote address (in a remoteAddress property) depending on a type of current connection.

But if the server is behind a reverse proxy, you'll have to pull it from appropriate header, most likely x-forwarded-for. However I'm not sure if that holds if proxies are chained.

So, to conclude, you'd do something along the lines of:

function cliAddress(req) {
  return req.connection.remoteAddress || req.socket.remoteAddress || req.headers['x-forwarded-for'];
}

server.isLocal = function(request) {
  return server.address() === cliAddress(req);
}

And if you use express.js see Express.js Req.IP API.