phoenix framework - What is Elixir Plug?

Question

As a newcomer to both Elixir and the web domain in general (no web framework experience) I would like to know, what is Plug? As I understand it Cowboy is a web server (albeit in Erlang, not Elixir) and Phoenix is a framework for building web apps, but where does Plug come in? Is it an abstraction layer between the two or perhaps a plug-in system in the same abstraction layer as Phoenix?

question from:https://stackoverflow.com/questions/26304727/what-is-elixir-plug

Answer 1

Is it an abstraction layer between the two

Yes, exactly! Plug is meant to be a generic adapter for different web servers. Currently we support just Cowboy but there is work to support others.

Plug also defines how different components should be plugged together. Similar to Rack in Ruby, WSGI in Python, Ring in Clojure, and so on.