Module: ActionController::HttpAuthentication::Basic

Extended by:
Basic
Included in:
Basic
Defined in:
lib/action_controller/metal/http_authentication.rb

Overview

Makes it dead easy to do HTTP Basic authentication.

Simple Basic example:

class PostsController < ApplicationController
  USER_NAME, PASSWORD = "dhh", "secret"

  before_filter :authenticate, :except => [ :index ]

  def index
    render :text => "Everyone can see me!"
  end

  def edit
    render :text => "I'm only accessible if you know the password"
  end

  private
    def authenticate
      authenticate_or_request_with_http_basic do |user_name, password|
        user_name == USER_NAME && password == PASSWORD
      end
    end
end

Here is a more advanced Basic example where only Atom feeds and the XML API is protected by HTTP authentication, the regular HTML interface is protected by a session approach:

class ApplicationController < ActionController::Base
  before_filter :set_account, :authenticate

  protected
    def 
      @account = Account.find_by_url_name(request.subdomains.first)
    end

    def authenticate
      case request.format
      when Mime::XML, Mime::ATOM
        if user = authenticate_with_http_basic { |u, p| @account.users.authenticate(u, p) }
          @current_user = user
        else
          request_http_basic_authentication
        end
      else
        if session_authenticated?
          @current_user = @account.users.find(session[:authenticated][:user_id])
        else
          redirect_to() and return false
        end
      end
    end
end

In your integration tests, you can do something like this:

def test_access_granted_from_xml
  get(
    "/notes/1.xml", nil,
    'HTTP_AUTHORIZATION' => ActionController::HttpAuthentication::Basic.encode_credentials(users(:dhh).name, users(:dhh).password)
  )

  assert_equal 200, status
end

Simple Digest example:

require 'digest/md5'
class PostsController < ApplicationController
  REALM = "SuperSecret"
  USERS = {"dhh" => "secret", #plain text password
           "dap" => Digest:MD5::hexdigest(["dap",REALM,"secret"].join(":"))  #ha1 digest password

  before_filter :authenticate, :except => [:index]

  def index
    render :text => "Everyone can see me!"
  end

  def edit
    render :text => "I'm only accessible if you know the password"
  end

  private
    def authenticate
      authenticate_or_request_with_http_digest(REALM) do |username|
        USERS[username]
      end
    end
end

Notes

The authenticate_or_request_with_http_digest block must return the user's password or the ha1 digest hash so the framework can appropriately hash to check the user's credentials. Returning nil will cause authentication to fail.

On shared hosts, Apache sometimes doesn't pass authentication headers to FCGI instances. If your environment matches this description and you cannot authenticate, try this rule in your Apache setup:

RewriteRule ^(.*)$ dispatch.fcgi [E=X-HTTP_AUTHORIZATION:%{HTTP:Authorization},QSA,L]

Defined Under Namespace

Modules: ControllerMethods

Instance Method Summary collapse

Instance Method Details

#authenticate(request, &login_procedure) ⇒ Object


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# File 'lib/action_controller/metal/http_authentication.rb', line 126

def authenticate(request, &)
  unless request.authorization.blank?
    .call(*user_name_and_password(request))
  end
end

#authentication_request(controller, realm) ⇒ Object


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# File 'lib/action_controller/metal/http_authentication.rb', line 144

def authentication_request(controller, realm)
  controller.headers["WWW-Authenticate"] = %(Basic realm="#{realm.gsub(/"/, "")}")
  controller.response_body = "HTTP Basic: Access denied.\n"
  controller.status = 401
end

#decode_credentials(request) ⇒ Object


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# File 'lib/action_controller/metal/http_authentication.rb', line 136

def decode_credentials(request)
  ActiveSupport::Base64.decode64(request.authorization.split(' ', 2).last || '')
end

#encode_credentials(user_name, password) ⇒ Object


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# File 'lib/action_controller/metal/http_authentication.rb', line 140

def encode_credentials(user_name, password)
  "Basic #{ActiveSupport::Base64.encode64("#{user_name}:#{password}")}"
end

#user_name_and_password(request) ⇒ Object


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# File 'lib/action_controller/metal/http_authentication.rb', line 132

def user_name_and_password(request)
  decode_credentials(request).split(/:/, 2)
end