Super Simple API Setup in Ruby + Curl Commands

api.rb

require 'sinatra'
require 'json'

post '/' do
  push = JSON.parse(request.body.read)
  { :body => push }.to_json
end

get '/:id?' do
  content_type :json
  { :params => params }.to_json
end

tests.bash

echo POST / json string
curl -H "Content-Type: application/json" -X POST -d '{"username":"xxx","password":"xxx"}' localhost:4567

echo POST / data.json file
# http://unix.stackexchange.com/questions/144479/what-does-the-at-symbol-before-a-filename-mean-in-a-curl-command
curl -H "Content-Type: application/json" -X POST localhost:4567 -d @data.json

echo GET /:id
curl localhost:4567/451