gem 'sinatra-simple-auth'

# classic_app.rb
require 'rubygems'
require 'sinatra'
require 'sinatra/simple_auth'

enable :sessions
set :password, 'my_cool_password' # set the password
set :home, '/secure/' # where user should be redirected after successful authentication

get '/login/?' do
  erb :login # page with auth form
end

get '/secure/' do
  protected! # protected route, requires auth
  erb :secure
end

get '/' do
  if authorized? # helper method
    "Hello, %username%"
  else
    "Not authorized"
  end
end

# modular_app.rb
require 'sinatra/base'
require 'sinatra/simple_auth'

class SinatraModularApp < Sinatra::Base
  enable :sessions
  register Sinatra::SimpleAuth

  set :password, 'hello' # set the password
  set :home, '/' # where user should be redirected after successful authentication

  get '/login/?' do
    erb :login # page with auth form
  end

  get '/secure/' do
    protected! # protected route, requires auth
    erb :secure
  end

  get '/' do
    if authorized? # helper method
      "Hello, %username%"
    else
      "Not authorized"
    end
  end
end