Get hostname of current request in node.js Express

node.js express hostname
Jesse picture Jesse · Sep 21, 2011 · Viewed 215.6k times · Source

So, I may be missing something simple here, but I can't seem to find a way to get the hostname that a request object I'm sending a response to was requested from.

Is it possible to figure out what hostname the user is currently visiting from node.js?

Answer

stephenbez picture stephenbez · Feb 22, 2012

You can use the os Module:

var os = require("os");
os.hostname();

See http://nodejs.org/docs/latest/api/os.html#os_os_hostname

Caveats:

  1. if you can work with the IP address -- Machines may have several Network Cards and unless you specify it node will listen on all of them, so you don't know on which NIC the request came in, before it comes in.

  2. Hostname is a DNS matter -- Don't forget that several DNS aliases can point to the same machine.

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