Parses form-encoded body params for GET requests.
Plug.Parsers only parses request bodies for POST/PUT/PATCH/DELETE.
Some HTTP clients (e.g. Stripe SDK wrappers using Req with form: option)
send form-encoded params in the body even for GET requests. This plug reads
the body and sets body_params so that Plug.Parsers merges them with
query params correctly.
Summary
Functions
Callback implementation for Plug.call/2.
Callback implementation for Plug.init/1.