listen.rb

require 'sinatra'

post '/*' do
  puts JSON.pretty_generate(request.env)
  puts request.body.read
end

put '/*' do
  puts JSON.pretty_generate(request.env)
  puts request.body.read
end

get '/*' do
  env = JSON.pretty_generate(request.env)
  body = request.body.read
  puts env # log
  puts body
  env + "\n" + body
end