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Securing the Login for a Rails Ecommerce Application


In the first part of this four-part series we started to learn about security for an ecommerce application in Ruby-on-Rails. In this second part we're going to test some of what we did in the first part, and implement some important login features. This article is excerpted from chapter eight of the book Practical Rails Projects, written by Eldon Alameda (Apress; ISBN: 1590597818).

Author Info:
By: Apress Publishing
Rating: 5 stars5 stars5 stars5 stars5 stars / 5
June 17, 2010
TABLE OF CONTENTS:
  1. · Securing the Login for a Rails Ecommerce Application
  2. · Implementing the Fail Log In User Story
  3. · Adding the Flash Message
  4. · Adding Login Links and Styling

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Securing the Login for a Rails Ecommerce Application
(Page 1 of 4 )

Testing Redirection

The last part of the story was that after successful login, George is redirected to the page he tried to access in the first place.acts_as_authenticatedshould do this for us automatically. Letís extend our integration test (authentication_test.rb) as follows to make sure.

require "#{File.dirname(__FILE__)}/../test_helper"

class AuthenticationTest < ActionController::IntegrationTest
 
def setup
   
User.create(:login => "george",
                :email =>
george@emporium.com,
                :password => "cheetah",
                :password_confirmation => "cheetah")
 
end

  def test_successful_login
    george = enter_site(:george)
    george.tries_to_go_to_admin

    george.logs_in_successfully("george", "cheetah")
 
end

  private

  module BrowsingTestDSL
    include ERB::Util
    attr_writer :name

    def tries_to_go_to_admin
      get "/admin/book/new"
      assert_response :redirect
      assert_redirected_to "/account/login"
    end

    def logs_in_successfully(login, password)
      post_login(login, password)
      assert_response :redirect
      assert_redirected_to "/admin/book/new"
    end

    private

    def post_login(login, password)
      post "/account/login", :login => login, :password => password
    end
 
end

  def enter_site(name)
   
open_session do |session|
      session.extend(BrowsingTestDSL)
      session.name = name
      yield session if block_given?
    end
  end
end

In the beginning of the test, we use thesetupmethod, which is automatically run before every test method, to create George as a user in the system. Then we create another DSL method for logging in to the system successfully. We extracted the actual posting of the login credentials to a private method, because we will need the same code later when we test a failed login. All our new method tests is that after successful login, George is redirected to/admin/book/new, the page he tried to access before he was thrown to the login page.

Running the test again shows that the authentication system indeed remembers where George was heading:

$ ruby test/integration/authentication_test.rb

--------------------------------------------
Loaded suite test/integration/authentication_test Started
.
Finished in 0.192056 seconds.

1 tests, 6 assertions, 0 failures, 0 errors --------------------------------------------

Trying to access the admin pages in a browser confirms what the test already says. As you can see in Figure 8-1, if you havenít logged in successfully, youíre redirected to the login page.


Figure 8-1.  Accessing the admin pages redirects to the login page


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