Get hostname of current request in node.js Express


Question

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?

1
153
10/30/2016 9:10:02 AM

Accepted Answer

If you're talking about an HTTP request, you can find the request host in:

request.headers.host

But that relies on an incoming request.

More at http://nodejs.org/docs/v0.4.12/api/http.html#http.ServerRequest

If you're looking for machine/native information, try the process object.

172
10/23/2014 1:57:37 PM

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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