Spine.js contacts demo Sinatra backend

app.rb

require 'bundler/setup'
Bundler.require

DB = Sequel.sqlite

DB.create_table :contacts do
  primary_key :id
  String  :name
  String  :email
end

class Contact < Sequel::Model
  self.strict_param_setting = false
end

set :port, 3000
set :protection, except: :json_csrf

before do
  headers \
    'Access-Control-Allow-Origin' => 'http://localhost:9294',
    'Access-Control-Allow-Methods' => %w{GET POST PUT DELETE OPTIONS}.join(','),
    'Access-Control-Allow-Headers' => %w{Origin Accept Content-Type X-Requested-With X-CSRF-Token}.join(',')
  params['contact'] = Yajl::Parser.parse request.body || {} 
end

options '/contacts*' do
  200
end

get '/contacts/:id' do
  @contact = Contact[params['id']]
  yajl :show
end

put '/contacts/:id' do
  @contact = Contact[params['id']].update(params['contact'])
  yajl :show
end

delete '/contacts/:id' do
  Contact[params['id']].destroy
  200
end

get '/contacts' do
  @contacts = Contact.all
  yajl :index
end

post '/contacts' do
  @contact = Contact.create(params['contact'])
  yajl :show
end

__END__
@@index
json = @contacts.map {|c| c.values }

@@show
json = @contact.values

Gemfile

source 'https://rubygems.org'

gem 'sinatra', git: 'git://github.com/sinatra/sinatra.git'

gem 'sequel'
gem 'sqlite3'

gem 'yajl-ruby', require: 'yajl'