What is a very simple authentication scheme for Sinatra/Rack
Here is a very simple authentication scheme for Sinatra.
I’ll explain how it works below.
class App < Sinatra::Base set :sessions => true register do def auth (type) condition do redirect "/login" unless send("is_#{type}?") end end end helpers do def is_user? @user != nil end end before do @user = User.get(session[:user_id]) end get "/" do "Hello, anonymous." end get "/protected", :auth => :user do "Hello, #{@user.name}." end post "/login" do session[:user_id] = User.authenticate(params).id end get "/logout" do session[:user_id] = nil endendFor any route you want to protect, add the :auth => :user condition to it, as in the /protected example above. That will call the auth method, which adds a condition to the route via condition.
The condition calls the is_user? method, which has been defined as a helper. The method should return true or false depending on whether the session contains a valid account id. (Calling helpers dynamically like this makes it simple to add other types of users with different privileges.)
Finally, the before handler sets up a @user instance variable for every request for things like displaying the user’s name at the top of each page. You can also use the is_user? helper in your views to determine if the user is logged in.
Todd's answer does not work for me, and I found an even simpler solution for one-off dead simple authentication in Sinatra's FAQ:
require 'rubygems'require 'sinatra'use Rack::Auth::Basic, "Restricted Area" do |username, password| [username, password] == ['admin', 'admin'] endget '/' do "You're welcome"endI thought I would share it just in case anyone wandered this question and needed a non-persistent solution.
I' have found this tutorial and repository with a full example, its working fine for me