sinatra

Sinatra

So we've looked at Rack and even written our own framework. Now it's time to use someone else's. Sinatra is a really nice framework that has a great DSL for defining both services and sites.

Classic and Modular applications

There are two types of Sinatra application. Classic and Modular.

Classic

require 'sinatra'

get '/' do
  'hello world'
end

Modular

require 'sinatra'

class App < Sinatra::Base

  get '/' do
    'hello'
  end

end

run App

Exercises

Objectives:

• Get to grips with writing Modular Sinatra applications
• Test them throughly using Rack::Test etc...
• Implement Rakefiles for your projects

Task 1: View my Bill

Some things are not meant to be seen by everyone and your billing information is a good example.

Write an application that has a login in screen that will only let you see your bill if you have the right user name and password.

Note: the purpose of the exercise is to have a play with Sinatra so the username and password can be hard coded.

Once you are logged in, read in the the JSON from the supplied file and render it using a view templating engine of your choice.

Task 2: Bill Service

The bill data needs to come from some where and files are so yesterday. Write a service using Sinatra to serve the JSON that you used in the previous task.

Once you've done this call this services from within you bill application.