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ruby-on-railsomniauthhostnameenv

What's the best way to get the hostname from the env hash in a Rails app?

I'm writing an OmniAuth dynamic provider and in the callback I need to get the current hostname (the app works in several different hostnames). I don't have the request object, just a big env hash. I found this hash contains an entry, env["SERVER_NAME"], with the hostname, but I'm not sure if that's a stable entry or it may change depending on the web server or stuff like that.

I also found the hostname buried in env["action_dispatch.routes"] in the member variable @host.

Any ideas what's the best or canonical way to get the hostname at this point?

Solution

  • The app is not in production yet, but so far the the private beta, using env["SERVER_NAME"] worked like a charm.