Creating a Minimal Sinatra App For Hosting Test Files

basic_auth.rb

class BasicAuth
  class << self
    def enable_if_possible
      return unless on?
      Sinatra::Application.use(Rack::Auth::Basic) do |username, password|
        valid_credentials?(username, password)
      end
    end
    
    private
    
    # Basic auth is on only if both username and password are set
    def on?
      username && password
    end
    
    def valid_credentials?(username_, password_)
      raise 'Arguments missing' unless username_ && password_
      username_ == username && password == password_
    end
    
    def username
      ENV['BASIC_AUTH_USERNAME']
    end
    
    def password
      ENV['BASIC_AUTH_PASSWORD']
    end
  end
end

config.ru

require './server'
run Sinatra::Application

$stdout.sync = true

Gemfile

source "https://rubygems.org"

ruby '2.5.1'
gem 'sinatra', '~> 2.0'

server (version 1).rb

# server.rb

require 'sinatra'

server (version 2).rb

require 'sinatra'
require_relative 'basic_auth'

BasicAuth.enable_if_possible