Just send a response 200 ok.
Displays rack environment values.
Try this app with
$ rackup
workspace/plain_rack - [masterU] (′•_•) be rackup
From: ~/workspace/plain_rack/config.ru @ line 40 :
35: title + ['<p>Sorry, We could not found a requested page...</p>']
36: end
37:
38: binding.pry
39:
=> 40: run res
[1] pry(#<Rack::Builder>)> ls
Rack::Builder#methods: call map run to_app use warmup
self.methods: about header index not_found res title
instance variables: @map @run @use @warmup
locals: _ __ _dir_ _ex_ _file_ _in_ _out_ _pry_ str version