How to add a Plug in Elixir / Phoenix before the Router? -

is there way insert plug run prior router selecting controller/action? i've got app redirect root path specific subdomains, regardless of current path on domains. so:

sub.myapp.com/foo/bar should redirect sub.myapp.com/

but, default, router says there no path /foo/bar , halts execution of plugs, meaning never hits redirect.

is there way insert plug prior router choosing action/controller?

(note: i'm pretty sure can handle case a catch-all route, i'm curious if there's better way.)

your router called explicitly in lib/my_app/endpoint.ex. can add plugs in file before then.

you can write plug handles redirects , halt connection before router called.

defmodule hellophoenix.endpoint   use phoenix.endpoint, otp_app: :hello_phoenix   plug plug.requestid   plug plug.logger   ...   plug customredirectplug # add plug here   plug hellophoenix.router end