rm -r controller/base!

9 files changed, 1380 insertions, 0 deletions

diff --git a/actionpack/lib/action_controller/base/cookies.rb b/actionpack/lib/action_controller/base/cookies.rb
new file mode 100644
index 0000000000..d4806623c3
--- /dev/null
+++ b/actionpack/lib/action_controller/base/cookies.rb
@@ -0,0 +1,94 @@
+module ActionController #:nodoc:
+  # Cookies are read and written through ActionController#cookies.
+  #
+  # The cookies being read are the ones received along with the request, the cookies
+  # being written will be sent out with the response. Reading a cookie does not get
+  # the cookie object itself back, just the value it holds.
+  #
+  # Examples for writing:
+  #
+  #   # Sets a simple session cookie.
+  #   cookies[:user_name] = "david"
+  #
+  #   # Sets a cookie that expires in 1 hour.
+  #   cookies[:login] = { :value => "XJ-122", :expires => 1.hour.from_now }
+  #
+  # Examples for reading:
+  #
+  #   cookies[:user_name] # => "david"
+  #   cookies.size        # => 2
+  #
+  # Example for deleting:
+  #
+  #   cookies.delete :user_name
+  #
+  # Please note that if you specify a :domain when setting a cookie, you must also specify the domain when deleting the cookie:
+  #
+  #  cookies[:key] = {
+  #    :value => 'a yummy cookie',
+  #    :expires => 1.year.from_now,
+  #    :domain => 'domain.com'
+  #  }
+  #
+  #  cookies.delete(:key, :domain => 'domain.com')
+  #
+  # The option symbols for setting cookies are:
+  #
+  # * <tt>:value</tt> - The cookie's value or list of values (as an array).
+  # * <tt>:path</tt> - The path for which this cookie applies.  Defaults to the root
+  #   of the application.
+  # * <tt>:domain</tt> - The domain for which this cookie applies.
+  # * <tt>:expires</tt> - The time at which this cookie expires, as a Time object.
+  # * <tt>:secure</tt> - Whether this cookie is a only transmitted to HTTPS servers.
+  #   Default is +false+.
+  # * <tt>:httponly</tt> - Whether this cookie is accessible via scripting or
+  #   only HTTP. Defaults to +false+.
+  module Cookies
+    def self.included(base)
+      base.helper_method :cookies
+    end
+
+    protected
+      # Returns the cookie container, which operates as described above.
+      def cookies
+        @cookies ||= CookieJar.new(self)
+      end
+  end
+
+  class CookieJar < Hash #:nodoc:
+    def initialize(controller)
+      @controller, @cookies = controller, controller.request.cookies
+      super()
+      update(@cookies)
+    end
+
+    # Returns the value of the cookie by +name+, or +nil+ if no such cookie exists.
+    def [](name)
+      super(name.to_s)
+    end
+
+    # Sets the cookie named +name+. The second argument may be the very cookie
+    # value, or a hash of options as documented above.
+    def []=(key, options)
+      if options.is_a?(Hash)
+        options.symbolize_keys!
+      else
+        options = { :value => options }
+      end
+
+      options[:path] = "/" unless options.has_key?(:path)
+      super(key.to_s, options[:value])
+      @controller.response.set_cookie(key, options)
+    end
+
+    # Removes the cookie on the client machine by setting the value to an empty string
+    # and setting its expiration date into the past. Like <tt>[]=</tt>, you can pass in
+    # an options hash to delete cookies with extra data such as a <tt>:path</tt>.
+    def delete(key, options = {})
+      options.symbolize_keys!
+      options[:path] = "/" unless options.has_key?(:path)
+      super(key.to_s)
+      @controller.response.delete_cookie(key, options)
+    end
+  end
+end
diff --git a/actionpack/lib/action_controller/base/filter_parameter_logging.rb b/actionpack/lib/action_controller/base/filter_parameter_logging.rb
new file mode 100644
index 0000000000..8370ba6fc0
--- /dev/null
+++ b/actionpack/lib/action_controller/base/filter_parameter_logging.rb
@@ -0,0 +1,95 @@
+module ActionController
+  module FilterParameterLogging
+    extend ActiveSupport::Concern
+
+    # TODO : Remove the defined? check when new base is the main base
+    if defined?(ActionController::Http)
+      include AbstractController::Logger
+    end
+
+    included do
+      include InstanceMethodsForNewBase
+    end
+
+    module ClassMethods
+      # Replace sensitive parameter data from the request log.
+      # Filters parameters that have any of the arguments as a substring.
+      # Looks in all subhashes of the param hash for keys to filter.
+      # If a block is given, each key and value of the parameter hash and all
+      # subhashes is passed to it, the value or key
+      # can be replaced using String#replace or similar method.
+      #
+      # Examples:
+      #   filter_parameter_logging
+      #   => Does nothing, just slows the logging process down
+      #
+      #   filter_parameter_logging :password
+      #   => replaces the value to all keys matching /password/i with "[FILTERED]"
+      #
+      #   filter_parameter_logging :foo, "bar"
+      #   => replaces the value to all keys matching /foo|bar/i with "[FILTERED]"
+      #
+      #   filter_parameter_logging { |k,v| v.reverse! if k =~ /secret/i }
+      #   => reverses the value to all keys matching /secret/i
+      #
+      #   filter_parameter_logging(:foo, "bar") { |k,v| v.reverse! if k =~ /secret/i }
+      #   => reverses the value to all keys matching /secret/i, and
+      #      replaces the value to all keys matching /foo|bar/i with "[FILTERED]"
+      def filter_parameter_logging(*filter_words, &block)
+        parameter_filter = Regexp.new(filter_words.collect{ |s| s.to_s }.join('|'), true) if filter_words.length > 0
+
+        define_method(:filter_parameters) do |unfiltered_parameters|
+          filtered_parameters = {}
+
+          unfiltered_parameters.each do |key, value|
+            if key =~ parameter_filter
+              filtered_parameters[key] = '[FILTERED]'
+            elsif value.is_a?(Hash)
+              filtered_parameters[key] = filter_parameters(value)
+            elsif block_given?
+              key = key.dup
+              value = value.dup if value
+              yield key, value
+              filtered_parameters[key] = value
+            else
+              filtered_parameters[key] = value
+            end
+          end
+
+          filtered_parameters
+        end
+        protected :filter_parameters
+      end
+    end
+
+    module InstanceMethodsForNewBase
+      # TODO : Fix the order of information inside such that it's exactly same as the old base
+      def process(*)
+        ret = super
+
+        if logger
+          parameters = respond_to?(:filter_parameters) ? filter_parameters(params) : params.dup
+          parameters = parameters.except!(:controller, :action, :format, :_method, :only_path)
+
+          unless parameters.empty?
+            # TODO : Move DelayedLog to AS
+            log = AbstractController::Logger::DelayedLog.new { "  Parameters: #{parameters.inspect}" }
+            logger.info(log)
+          end
+        end
+
+        ret
+      end
+    end
+
+    private
+
+    # TODO : This method is not needed for the new base
+    def log_processing_for_parameters
+      parameters = respond_to?(:filter_parameters) ? filter_parameters(params) : params.dup
+      parameters = parameters.except!(:controller, :action, :format, :_method)
+
+      logger.info "  Parameters: #{parameters.inspect}" unless parameters.empty?
+    end
+  end
+end
diff --git a/actionpack/lib/action_controller/base/flash.rb b/actionpack/lib/action_controller/base/flash.rb
new file mode 100644
index 0000000000..42c6e430ca
--- /dev/null
+++ b/actionpack/lib/action_controller/base/flash.rb
@@ -0,0 +1,196 @@
+module ActionController #:nodoc:
+  # The flash provides a way to pass temporary objects between actions. Anything you place in the flash will be exposed
+  # to the very next action and then cleared out. This is a great way of doing notices and alerts, such as a create
+  # action that sets <tt>flash[:notice] = "Successfully created"</tt> before redirecting to a display action that can
+  # then expose the flash to its template. Actually, that exposure is automatically done. Example:
+  #
+  #   class PostsController < ActionController::Base
+  #     def create
+  #       # save post
+  #       flash[:notice] = "Successfully created post"
+  #       redirect_to posts_path(@post)
+  #     end
+  #
+  #     def show
+  #       # doesn't need to assign the flash notice to the template, that's done automatically
+  #     end
+  #   end
+  #
+  #   show.html.erb
+  #     <% if flash[:notice] %>
+  #       <div class="notice"><%= flash[:notice] %></div>
+  #     <% end %>
+  #
+  # This example just places a string in the flash, but you can put any object in there. And of course, you can put as
+  # many as you like at a time too. Just remember: They'll be gone by the time the next action has been performed.
+  #
+  # See docs on the FlashHash class for more details about the flash.
+  module Flash
+    extend ActiveSupport::Concern
+
+    # TODO : Remove the defined? check when new base is the main base
+    include Session if defined?(ActionController::Http)
+
+    included do
+      # TODO : Remove the defined? check when new base is the main base
+      if defined?(ActionController::Http)
+        include InstanceMethodsForNewBase
+      else
+        include InstanceMethodsForBase
+
+        alias_method_chain :perform_action, :flash
+        alias_method_chain :reset_session,  :flash
+      end
+    end
+
+    class FlashNow #:nodoc:
+      def initialize(flash)
+        @flash = flash
+      end
+
+      def []=(k, v)
+        @flash[k] = v
+        @flash.discard(k)
+        v
+      end
+
+      def [](k)
+        @flash[k]
+      end
+    end
+
+    class FlashHash < Hash
+      def initialize #:nodoc:
+        super
+        @used = {}
+      end
+
+      def []=(k, v) #:nodoc:
+        keep(k)
+        super
+      end
+
+      def update(h) #:nodoc:
+        h.keys.each { |k| keep(k) }
+        super
+      end
+
+      alias :merge! :update
+
+      def replace(h) #:nodoc:
+        @used = {}
+        super
+      end
+
+      # Sets a flash that will not be available to the next action, only to the current.
+      #
+      #     flash.now[:message] = "Hello current action"
+      #
+      # This method enables you to use the flash as a central messaging system in your app.
+      # When you need to pass an object to the next action, you use the standard flash assign (<tt>[]=</tt>).
+      # When you need to pass an object to the current action, you use <tt>now</tt>, and your object will
+      # vanish when the current action is done.
+      #
+      # Entries set via <tt>now</tt> are accessed the same way as standard entries: <tt>flash['my-key']</tt>.
+      def now
+        FlashNow.new(self)
+      end
+
+      # Keeps either the entire current flash or a specific flash entry available for the next action:
+      #
+      #    flash.keep            # keeps the entire flash
+      #    flash.keep(:notice)   # keeps only the "notice" entry, the rest of the flash is discarded
+      def keep(k = nil)
+        use(k, false)
+      end
+
+      # Marks the entire flash or a single flash entry to be discarded by the end of the current action:
+      #
+      #     flash.discard              # discard the entire flash at the end of the current action
+      #     flash.discard(:warning)    # discard only the "warning" entry at the end of the current action
+      def discard(k = nil)
+        use(k)
+      end
+
+      # Mark for removal entries that were kept, and delete unkept ones.
+      #
+      # This method is called automatically by filters, so you generally don't need to care about it.
+      def sweep #:nodoc:
+        keys.each do |k|
+          unless @used[k]
+            use(k)
+          else
+            delete(k)
+            @used.delete(k)
+          end
+        end
+
+        # clean up after keys that could have been left over by calling reject! or shift on the flash
+        (@used.keys - keys).each{ |k| @used.delete(k) }
+      end
+
+      def store(session, key = "flash")
+        return if self.empty?
+        session[key] = self
+      end
+
+      private
+        # Used internally by the <tt>keep</tt> and <tt>discard</tt> methods
+        #     use()               # marks the entire flash as used
+        #     use('msg')          # marks the "msg" entry as used
+        #     use(nil, false)     # marks the entire flash as unused (keeps it around for one more action)
+        #     use('msg', false)   # marks the "msg" entry as unused (keeps it around for one more action)
+        # Returns the single value for the key you asked to be marked (un)used or the FlashHash itself
+        # if no key is passed.
+        def use(key = nil, used = true)
+          Array(key || keys).each { |k| @used[k] = used }
+          return key ? self[key] : self
+        end
+    end
+
+    module InstanceMethodsForBase #:nodoc:
+      protected
+        def perform_action_with_flash
+          perform_action_without_flash
+          if defined? @_flash
+            @_flash.store(session)
+            remove_instance_variable(:@_flash)
+          end
+        end
+
+        def reset_session_with_flash
+          reset_session_without_flash
+          remove_instance_variable(:@_flash) if defined?(@_flash)
+        end
+    end
+
+    module InstanceMethodsForNewBase #:nodoc:
+      protected
+        def process_action(method_name)
+          super
+          if defined? @_flash
+            @_flash.store(session)
+            remove_instance_variable(:@_flash)
+          end
+        end
+
+        def reset_session
+          super
+          remove_instance_variable(:@_flash) if defined?(@_flash)
+        end
+    end
+
+    protected
+      # Access the contents of the flash. Use <tt>flash["notice"]</tt> to
+      # read a notice you put there or <tt>flash["notice"] = "hello"</tt>
+      # to put a new one.
+      def flash #:doc:
+        if !defined?(@_flash)
+          @_flash = session["flash"] || FlashHash.new
+          @_flash.sweep
+        end
+
+        @_flash
+      end
+  end
+end
diff --git a/actionpack/lib/action_controller/base/http_authentication.rb b/actionpack/lib/action_controller/base/http_authentication.rb
new file mode 100644
index 0000000000..2519f55269
--- /dev/null
+++ b/actionpack/lib/action_controller/base/http_authentication.rb
@@ -0,0 +1,309 @@
+require 'active_support/base64'
+
+module ActionController
+  module HttpAuthentication
+    # 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 set_account
+    #         @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(login_url) 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,
+    #       :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
+    #
+    # NOTE: 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.
+    #       Storing the ha1 hash: MD5(username:realm:password), is better than storing a plain password. If
+    #       the password file or database is compromised, the attacker would be able to use the ha1 hash to
+    #       authenticate as the user at this +realm+, but would not have the user's password to try using at
+    #       other sites.
+    #
+    # 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]
+    module Basic
+      extend self
+
+      module ControllerMethods
+        def authenticate_or_request_with_http_basic(realm = "Application", &login_procedure)
+          authenticate_with_http_basic(&login_procedure) || request_http_basic_authentication(realm)
+        end
+
+        def authenticate_with_http_basic(&login_procedure)
+          HttpAuthentication::Basic.authenticate(self, &login_procedure)
+        end
+
+        def request_http_basic_authentication(realm = "Application")
+          HttpAuthentication::Basic.authentication_request(self, realm)
+        end
+      end
+
+      def authenticate(controller, &login_procedure)
+        unless authorization(controller.request).blank?
+          login_procedure.call(*user_name_and_password(controller.request))
+        end
+      end
+
+      def user_name_and_password(request)
+        decode_credentials(request).split(/:/, 2)
+      end
+
+      def authorization(request)
+        request.env['HTTP_AUTHORIZATION']   ||
+        request.env['X-HTTP_AUTHORIZATION'] ||
+        request.env['X_HTTP_AUTHORIZATION'] ||
+        request.env['REDIRECT_X_HTTP_AUTHORIZATION']
+      end
+
+      def decode_credentials(request)
+        ActiveSupport::Base64.decode64(authorization(request).split.last || '')
+      end
+
+      def encode_credentials(user_name, password)
+        "Basic #{ActiveSupport::Base64.encode64("#{user_name}:#{password}")}"
+      end
+
+      def authentication_request(controller, realm)
+        controller.headers["WWW-Authenticate"] = %(Basic realm="#{realm.gsub(/"/, "")}")
+        controller.__send__ :render, :text => "HTTP Basic: Access denied.\n", :status => :unauthorized
+      end
+    end
+
+    module Digest
+      extend self
+
+      module ControllerMethods
+        def authenticate_or_request_with_http_digest(realm = "Application", &password_procedure)
+          authenticate_with_http_digest(realm, &password_procedure) || request_http_digest_authentication(realm)
+        end
+
+        # Authenticate with HTTP Digest, returns true or false
+        def authenticate_with_http_digest(realm = "Application", &password_procedure)
+          HttpAuthentication::Digest.authenticate(self, realm, &password_procedure)
+        end
+
+        # Render output including the HTTP Digest authentication header
+        def request_http_digest_authentication(realm = "Application", message = nil)
+          HttpAuthentication::Digest.authentication_request(self, realm, message)
+        end
+      end
+
+      # Returns false on a valid response, true otherwise
+      def authenticate(controller, realm, &password_procedure)
+        authorization(controller.request) && validate_digest_response(controller.request, realm, &password_procedure)
+      end
+
+      def authorization(request)
+        request.env['HTTP_AUTHORIZATION']   ||
+        request.env['X-HTTP_AUTHORIZATION'] ||
+        request.env['X_HTTP_AUTHORIZATION'] ||
+        request.env['REDIRECT_X_HTTP_AUTHORIZATION']
+      end
+
+      # Returns false unless the request credentials response value matches the expected value.
+      # First try the password as a ha1 digest password. If this fails, then try it as a plain
+      # text password.
+      def validate_digest_response(request, realm, &password_procedure)
+        credentials = decode_credentials_header(request)
+        valid_nonce = validate_nonce(request, credentials[:nonce])
+
+        if valid_nonce && realm == credentials[:realm] && opaque == credentials[:opaque]
+          password = password_procedure.call(credentials[:username])
+          return false unless password
+
+          method = request.env['rack.methodoverride.original_method'] || request.env['REQUEST_METHOD']
+
+         [true, false].any? do |password_is_ha1|
+           expected = expected_response(method, request.env['REQUEST_URI'], credentials, password, password_is_ha1)
+           expected == credentials[:response]
+         end
+        end
+      end
+
+      # Returns the expected response for a request of +http_method+ to +uri+ with the decoded +credentials+ and the expected +password+
+      # Optional parameter +password_is_ha1+ is set to +true+ by default, since best practice is to store ha1 digest instead
+      # of a plain-text password.
+      def expected_response(http_method, uri, credentials, password, password_is_ha1=true)
+        ha1 = password_is_ha1 ? password : ha1(credentials, password)
+        ha2 = ::Digest::MD5.hexdigest([http_method.to_s.upcase, uri].join(':'))
+        ::Digest::MD5.hexdigest([ha1, credentials[:nonce], credentials[:nc], credentials[:cnonce], credentials[:qop], ha2].join(':'))
+      end
+
+      def ha1(credentials, password)
+        ::Digest::MD5.hexdigest([credentials[:username], credentials[:realm], password].join(':'))
+      end
+
+      def encode_credentials(http_method, credentials, password, password_is_ha1)
+        credentials[:response] = expected_response(http_method, credentials[:uri], credentials, password, password_is_ha1)
+        "Digest " + credentials.sort_by {|x| x[0].to_s }.inject([]) {|a, v| a << "#{v[0]}='#{v[1]}'" }.join(', ')
+      end
+
+      def decode_credentials_header(request)
+        decode_credentials(authorization(request))
+      end
+
+      def decode_credentials(header)
+        header.to_s.gsub(/^Digest\s+/,'').split(',').inject({}) do |hash, pair|
+          key, value = pair.split('=', 2)
+          hash[key.strip.to_sym] = value.to_s.gsub(/^"|"$/,'').gsub(/'/, '')
+          hash
+        end
+      end
+
+      def authentication_header(controller, realm)
+        controller.headers["WWW-Authenticate"] = %(Digest realm="#{realm}", qop="auth", algorithm=MD5, nonce="#{nonce}", opaque="#{opaque}")
+      end
+
+      def authentication_request(controller, realm, message = nil)
+        message ||= "HTTP Digest: Access denied.\n"
+        authentication_header(controller, realm)
+        controller.__send__ :render, :text => message, :status => :unauthorized
+      end
+
+      # Uses an MD5 digest based on time to generate a value to be used only once.
+      #
+      # A server-specified data string which should be uniquely generated each time a 401 response is made.
+      # It is recommended that this string be base64 or hexadecimal data.
+      # Specifically, since the string is passed in the header lines as a quoted string, the double-quote character is not allowed.
+      #
+      # The contents of the nonce are implementation dependent.
+      # The quality of the implementation depends on a good choice.
+      # A nonce might, for example, be constructed as the base 64 encoding of
+      #
+      # => time-stamp H(time-stamp ":" ETag ":" private-key)
+      #
+      # where time-stamp is a server-generated time or other non-repeating value,
+      # ETag is the value of the HTTP ETag header associated with the requested entity,
+      # and private-key is data known only to the server.
+      # With a nonce of this form a server would recalculate the hash portion after receiving the client authentication header and
+      # reject the request if it did not match the nonce from that header or
+      # if the time-stamp value is not recent enough. In this way the server can limit the time of the nonce's validity.
+      # The inclusion of the ETag prevents a replay request for an updated version of the resource.
+      # (Note: including the IP address of the client in the nonce would appear to offer the server the ability
+      # to limit the reuse of the nonce to the same client that originally got it.
+      # However, that would break proxy farms, where requests from a single user often go through different proxies in the farm.
+      # Also, IP address spoofing is not that hard.)
+      #
+      # An implementation might choose not to accept a previously used nonce or a previously used digest, in order to
+      # protect against a replay attack. Or, an implementation might choose to use one-time nonces or digests for
+      # POST or PUT requests and a time-stamp for GET requests. For more details on the issues involved see Section 4
+      # of this document.
+      #
+      # The nonce is opaque to the client. Composed of Time, and hash of Time with secret
+      # key from the Rails session secret generated upon creation of project. Ensures
+      # the time cannot be modifed by client.
+      def nonce(time = Time.now)
+        t = time.to_i
+        hashed = [t, secret_key]
+        digest = ::Digest::MD5.hexdigest(hashed.join(":"))
+        ActiveSupport::Base64.encode64("#{t}:#{digest}").gsub("\n", '')
+      end
+
+      # Might want a shorter timeout depending on whether the request
+      # is a PUT or POST, and if client is browser or web service.
+      # Can be much shorter if the Stale directive is implemented. This would
+      # allow a user to use new nonce without prompting user again for their
+      # username and password.
+      def validate_nonce(request, value, seconds_to_timeout=5*60)
+        t = ActiveSupport::Base64.decode64(value).split(":").first.to_i
+        nonce(t) == value && (t - Time.now.to_i).abs <= seconds_to_timeout
+      end
+
+      # Opaque based on random generation - but changing each request?
+      def opaque()
+        ::Digest::MD5.hexdigest(secret_key)
+      end
+
+      # Set in /initializers/session_store.rb, and loaded even if sessions are not in use.
+      def secret_key
+        ActionController::Base.session_options[:secret]
+      end
+
+    end
+  end
+end
diff --git a/actionpack/lib/action_controller/base/mime_responds.rb b/actionpack/lib/action_controller/base/mime_responds.rb
new file mode 100644
index 0000000000..5c7218691e
--- /dev/null
+++ b/actionpack/lib/action_controller/base/mime_responds.rb
@@ -0,0 +1,188 @@
+module ActionController #:nodoc:
+  module MimeResponds #:nodoc:
+    # Without web-service support, an action which collects the data for displaying a list of people
+    # might look something like this:
+    #
+    #   def index
+    #     @people = Person.find(:all)
+    #   end
+    #
+    # Here's the same action, with web-service support baked in:
+    #
+    #   def index
+    #     @people = Person.find(:all)
+    #
+    #     respond_to do |format|
+    #       format.html
+    #       format.xml { render :xml => @people.to_xml }
+    #     end
+    #   end
+    #
+    # What that says is, "if the client wants HTML in response to this action, just respond as we
+    # would have before, but if the client wants XML, return them the list of people in XML format."
+    # (Rails determines the desired response format from the HTTP Accept header submitted by the client.)
+    #
+    # Supposing you have an action that adds a new person, optionally creating their company
+    # (by name) if it does not already exist, without web-services, it might look like this:
+    #
+    #   def create
+    #     @company = Company.find_or_create_by_name(params[:company][:name])
+    #     @person  = @company.people.create(params[:person])
+    #
+    #     redirect_to(person_list_url)
+    #   end
+    #
+    # Here's the same action, with web-service support baked in:
+    #
+    #   def create
+    #     company  = params[:person].delete(:company)
+    #     @company = Company.find_or_create_by_name(company[:name])
+    #     @person  = @company.people.create(params[:person])
+    #
+    #     respond_to do |format|
+    #       format.html { redirect_to(person_list_url) }
+    #       format.js
+    #       format.xml  { render :xml => @person.to_xml(:include => @company) }
+    #     end
+    #   end
+    #
+    # If the client wants HTML, we just redirect them back to the person list. If they want Javascript
+    # (format.js), then it is an RJS request and we render the RJS template associated with this action.
+    # Lastly, if the client wants XML, we render the created person as XML, but with a twist: we also
+    # include the person's company in the rendered XML, so you get something like this:
+    #
+    #   <person>
+    #     <id>...</id>
+    #     ...
+    #     <company>
+    #       <id>...</id>
+    #       <name>...</name>
+    #       ...
+    #     </company>
+    #   </person>
+    #
+    # Note, however, the extra bit at the top of that action:
+    #
+    #   company  = params[:person].delete(:company)
+    #   @company = Company.find_or_create_by_name(company[:name])
+    #
+    # This is because the incoming XML document (if a web-service request is in process) can only contain a
+    # single root-node. So, we have to rearrange things so that the request looks like this (url-encoded):
+    #
+    #   person[name]=...&person[company][name]=...&...
+    #
+    # And, like this (xml-encoded):
+    #
+    #   <person>
+    #     <name>...</name>
+    #     <company>
+    #       <name>...</name>
+    #     </company>
+    #   </person>
+    #
+    # In other words, we make the request so that it operates on a single entity's person. Then, in the action,
+    # we extract the company data from the request, find or create the company, and then create the new person
+    # with the remaining data.
+    #
+    # Note that you can define your own XML parameter parser which would allow you to describe multiple entities
+    # in a single request (i.e., by wrapping them all in a single root node), but if you just go with the flow
+    # and accept Rails' defaults, life will be much easier.
+    #
+    # If you need to use a MIME type which isn't supported by default, you can register your own handlers in
+    # environment.rb as follows.
+    #
+    #   Mime::Type.register "image/jpg", :jpg
+    def respond_to(*types, &block)
+      raise ArgumentError, "respond_to takes either types or a block, never both" unless types.any? ^ block
+      block ||= lambda { |responder| types.each { |type| responder.send(type) } }
+      responder = Responder.new(self)
+      block.call(responder)
+      responder.respond
+    end
+
+    class Responder #:nodoc:
+      
+      def initialize(controller)
+        @controller = controller
+        @request    = controller.request
+        @response   = controller.response
+
+        @mime_type_priority = @request.formats
+
+        @order     = []
+        @responses = {}
+      end
+
+      def custom(mime_type, &block)
+        mime_type = mime_type.is_a?(Mime::Type) ? mime_type : Mime::Type.lookup(mime_type.to_s)
+
+        @order << mime_type
+
+        @responses[mime_type] ||= Proc.new do
+          # TODO: Remove this when new base is merged in
+          if defined?(Http)
+            @controller.formats = [mime_type.to_sym]
+          end
+
+          @controller.template.formats = [mime_type.to_sym]
+          @response.content_type = mime_type
+
+          block_given? ? block.call : @controller.send(:render, :action => @controller.action_name)
+        end
+      end
+
+      def any(*args, &block)
+        if args.any?
+          args.each { |type| send(type, &block) }
+        else
+          custom(@mime_type_priority.first, &block)
+        end
+      end
+      
+      def self.generate_method_for_mime(mime)
+        sym = mime.is_a?(Symbol) ? mime : mime.to_sym
+        const = sym.to_s.upcase
+        class_eval <<-RUBY, __FILE__, __LINE__ + 1
+          def #{sym}(&block)                # def html(&block)
+            custom(Mime::#{const}, &block)  #   custom(Mime::HTML, &block)
+          end                               # end
+        RUBY
+      end
+
+      Mime::SET.each do |mime|
+        generate_method_for_mime(mime)
+      end
+
+      def method_missing(symbol, &block)
+        mime_constant = Mime.const_get(symbol.to_s.upcase)
+      
+        if Mime::SET.include?(mime_constant)
+          self.class.generate_method_for_mime(mime_constant)
+          send(symbol, &block)
+        else
+          super
+        end
+      end
+
+      def respond
+        for priority in @mime_type_priority
+          if priority == Mime::ALL
+            @responses[@order.first].call
+            return
+          else
+            if @responses[priority]
+              @responses[priority].call
+              return # mime type match found, be happy and return
+            end
+          end
+        end
+
+        if @order.include?(Mime::ALL)
+          @responses[Mime::ALL].call
+        else
+          @controller.send :head, :not_acceptable
+        end
+      end
+    end
+  end
+end
diff --git a/actionpack/lib/action_controller/base/request_forgery_protection.rb b/actionpack/lib/action_controller/base/request_forgery_protection.rb
new file mode 100644
index 0000000000..a470c8eec1
--- /dev/null
+++ b/actionpack/lib/action_controller/base/request_forgery_protection.rb
@@ -0,0 +1,123 @@
+module ActionController #:nodoc:
+  class InvalidAuthenticityToken < ActionControllerError #:nodoc:
+  end
+
+  module RequestForgeryProtection
+    extend ActiveSupport::Concern
+
+    # TODO : Remove the defined? check when new base is the main base
+    if defined?(ActionController::Http)
+      include AbstractController::Helpers, Session
+    end
+
+    included do
+      if defined?(ActionController::Http)
+        # Sets the token parameter name for RequestForgery. Calling +protect_from_forgery+
+        # sets it to <tt>:authenticity_token</tt> by default.
+        cattr_accessor :request_forgery_protection_token
+
+        # Controls whether request forgergy protection is turned on or not. Turned off by default only in test mode.
+        class_inheritable_accessor :allow_forgery_protection
+        self.allow_forgery_protection = true
+      end
+
+      helper_method :form_authenticity_token
+      helper_method :protect_against_forgery?
+    end
+    
+    # Protecting controller actions from CSRF attacks by ensuring that all forms are coming from the current web application, not a
+    # forged link from another site, is done by embedding a token based on a random string stored in the session (which an attacker wouldn't know) in all
+    # forms and Ajax requests generated by Rails and then verifying the authenticity of that token in the controller.  Only
+    # HTML/JavaScript requests are checked, so this will not protect your XML API (presumably you'll have a different authentication
+    # scheme there anyway).  Also, GET requests are not protected as these should be idempotent anyway.
+    #
+    # This is turned on with the <tt>protect_from_forgery</tt> method, which will check the token and raise an
+    # ActionController::InvalidAuthenticityToken if it doesn't match what was expected. You can customize the error message in
+    # production by editing public/422.html.  A call to this method in ApplicationController is generated by default in post-Rails 2.0
+    # applications.
+    #
+    # The token parameter is named <tt>authenticity_token</tt> by default. If you are generating an HTML form manually (without the
+    # use of Rails' <tt>form_for</tt>, <tt>form_tag</tt> or other helpers), you have to include a hidden field named like that and
+    # set its value to what is returned by <tt>form_authenticity_token</tt>. Same applies to manually constructed Ajax requests. To
+    # make the token available through a global variable to scripts on a certain page, you could add something like this to a view:
+    #
+    #   <%= javascript_tag "window._token = '#{form_authenticity_token}'" %>
+    #
+    # Request forgery protection is disabled by default in test environment.  If you are upgrading from Rails 1.x, add this to
+    # config/environments/test.rb:
+    #
+    #   # Disable request forgery protection in test environment
+    #   config.action_controller.allow_forgery_protection = false
+    # 
+    # == Learn more about CSRF (Cross-Site Request Forgery) attacks
+    #
+    # Here are some resources:
+    # * http://isc.sans.org/diary.html?storyid=1750
+    # * http://en.wikipedia.org/wiki/Cross-site_request_forgery
+    #
+    # Keep in mind, this is NOT a silver-bullet, plug 'n' play, warm security blanket for your rails application.
+    # There are a few guidelines you should follow:
+    # 
+    # * Keep your GET requests safe and idempotent.  More reading material:
+    #   * http://www.xml.com/pub/a/2002/04/24/deviant.html
+    #   * http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.1.1
+    # * Make sure the session cookies that Rails creates are non-persistent.  Check in Firefox and look for "Expires: at end of session"
+    #
+    module ClassMethods
+      # Turn on request forgery protection. Bear in mind that only non-GET, HTML/JavaScript requests are checked.
+      #
+      # Example:
+      #
+      #   class FooController < ApplicationController
+      #     protect_from_forgery :except => :index
+      #
+      #     # you can disable csrf protection on controller-by-controller basis:
+      #     skip_before_filter :verify_authenticity_token
+      #   end
+      #
+      # Valid Options:
+      #
+      # * <tt>:only/:except</tt> - Passed to the <tt>before_filter</tt> call.  Set which actions are verified.
+      def protect_from_forgery(options = {})
+        self.request_forgery_protection_token ||= :authenticity_token
+        before_filter :verify_authenticity_token, :only => options.delete(:only), :except => options.delete(:except)
+        if options[:secret] || options[:digest]
+          ActiveSupport::Deprecation.warn("protect_from_forgery only takes :only and :except options now. :digest and :secret have no effect", caller)
+        end
+      end
+    end
+
+    protected
+      # The actual before_filter that is used.  Modify this to change how you handle unverified requests.
+      def verify_authenticity_token
+        verified_request? || raise(ActionController::InvalidAuthenticityToken)
+      end
+      
+      # Returns true or false if a request is verified.  Checks:
+      #
+      # * is the format restricted?  By default, only HTML requests are checked.
+      # * is it a GET request?  Gets should be safe and idempotent
+      # * Does the form_authenticity_token match the given token value from the params?
+      def verified_request?
+        !protect_against_forgery?     ||
+          request.method == :get      ||
+          request.xhr?                ||
+          !verifiable_request_format? ||
+          form_authenticity_token == params[request_forgery_protection_token]
+      end
+    
+      def verifiable_request_format?
+        !request.content_type.nil? && request.content_type.verify_request?
+      end
+    
+      # Sets the token value for the current session.  Pass a <tt>:secret</tt> option
+      # in +protect_from_forgery+ to add a custom salt to the hash.
+      def form_authenticity_token
+        session[:_csrf_token] ||= ActiveSupport::SecureRandom.base64(32)
+      end
+
+      def protect_against_forgery?
+        allow_forgery_protection && request_forgery_protection_token
+      end
+  end
+end
diff --git a/actionpack/lib/action_controller/base/session_management.rb b/actionpack/lib/action_controller/base/session_management.rb
new file mode 100644
index 0000000000..ffce8e1bd1
--- /dev/null
+++ b/actionpack/lib/action_controller/base/session_management.rb
@@ -0,0 +1,54 @@
+module ActionController #:nodoc:
+  module SessionManagement #:nodoc:
+    def self.included(base)
+      base.class_eval do
+        extend ClassMethods
+      end
+    end
+
+    module ClassMethods
+      # Set the session store to be used for keeping the session data between requests.
+      # By default, sessions are stored in browser cookies (<tt>:cookie_store</tt>),
+      # but you can also specify one of the other included stores (<tt>:active_record_store</tt>,
+      # <tt>:mem_cache_store</tt>, or your own custom class.
+      def session_store=(store)
+        if store == :active_record_store
+          self.session_store = ActiveRecord::SessionStore
+        else
+          @@session_store = store.is_a?(Symbol) ?
+            Session.const_get(store.to_s.camelize) :
+            store
+        end
+      end
+
+      # Returns the session store class currently used.
+      def session_store
+        if defined? @@session_store
+          @@session_store
+        else
+          ActionDispatch::Session::CookieStore
+        end
+      end
+
+      def session=(options = {})
+        self.session_store = nil if options.delete(:disabled)
+        session_options.merge!(options)
+      end
+
+      # Returns the hash used to configure the session. Example use:
+      #
+      #   ActionController::Base.session_options[:secure] = true # session only available over HTTPS
+      def session_options
+        @session_options ||= {}
+      end
+
+      def session(*args)
+        ActiveSupport::Deprecation.warn(
+          "Disabling sessions for a single controller has been deprecated. " +
+          "Sessions are now lazy loaded. So if you don't access them, " +
+          "consider them off. You can still modify the session cookie " +
+          "options with request.session_options.", caller)
+      end
+    end
+  end
+end
diff --git a/actionpack/lib/action_controller/base/streaming.rb b/actionpack/lib/action_controller/base/streaming.rb
new file mode 100644
index 0000000000..5c72fc9ad9
--- /dev/null
+++ b/actionpack/lib/action_controller/base/streaming.rb
@@ -0,0 +1,188 @@
+module ActionController #:nodoc:
+  # Methods for sending arbitrary data and for streaming files to the browser,
+  # instead of rendering.
+  module Streaming
+    extend ActiveSupport::Concern
+
+    # TODO : Remove the defined? check when new base is the main base
+    if defined?(ActionController::Http)
+      include ActionController::Renderer
+    end
+
+    DEFAULT_SEND_FILE_OPTIONS = {
+      :type         => 'application/octet-stream'.freeze,
+      :disposition  => 'attachment'.freeze,
+      :stream       => true,
+      :buffer_size  => 4096,
+      :x_sendfile   => false
+    }.freeze
+
+    X_SENDFILE_HEADER = 'X-Sendfile'.freeze
+
+    protected
+      # Sends the file, by default streaming it 4096 bytes at a time. This way the
+      # whole file doesn't need to be read into memory at once. This makes it
+      # feasible to send even large files. You can optionally turn off streaming
+      # and send the whole file at once.
+      #
+      # Be careful to sanitize the path parameter if it is coming from a web
+      # page. <tt>send_file(params[:path])</tt> allows a malicious user to
+      # download any file on your server.
+      #
+      # Options:
+      # * <tt>:filename</tt> - suggests a filename for the browser to use.
+      #   Defaults to <tt>File.basename(path)</tt>.
+      # * <tt>:type</tt> - specifies an HTTP content type. Defaults to 'application/octet-stream'. You can specify
+      #   either a string or a symbol for a registered type register with <tt>Mime::Type.register</tt>, for example :json
+      # * <tt>:length</tt> - used to manually override the length (in bytes) of the content that
+      #   is going to be sent to the client. Defaults to <tt>File.size(path)</tt>.
+      # * <tt>:disposition</tt> - specifies whether the file will be shown inline or downloaded.
+      #   Valid values are 'inline' and 'attachment' (default).
+      # * <tt>:stream</tt> - whether to send the file to the user agent as it is read (+true+)
+      #   or to read the entire file before sending (+false+). Defaults to +true+.
+      # * <tt>:buffer_size</tt> - specifies size (in bytes) of the buffer used to stream the file.
+      #   Defaults to 4096.
+      # * <tt>:status</tt> - specifies the status code to send with the response. Defaults to '200 OK'.
+      # * <tt>:url_based_filename</tt> - set to +true+ if you want the browser guess the filename from
+      #   the URL, which is necessary for i18n filenames on certain browsers
+      #   (setting <tt>:filename</tt> overrides this option).
+      # * <tt>:x_sendfile</tt> - uses X-Sendfile to send the file when set to +true+. This is currently
+      #   only available with Lighttpd/Apache2 and specific modules installed and activated. Since this
+      #   uses the web server to send the file, this may lower memory consumption on your server and
+      #   it will not block your application for further requests.
+      #   See http://blog.lighttpd.net/articles/2006/07/02/x-sendfile and
+      #   http://tn123.ath.cx/mod_xsendfile/ for details. Defaults to +false+.
+      #
+      # The default Content-Type and Content-Disposition headers are
+      # set to download arbitrary binary files in as many browsers as
+      # possible.  IE versions 4, 5, 5.5, and 6 are all known to have
+      # a variety of quirks (especially when downloading over SSL).
+      #
+      # Simple download:
+      #
+      #   send_file '/path/to.zip'
+      #
+      # Show a JPEG in the browser:
+      #
+      #   send_file '/path/to.jpeg', :type => 'image/jpeg', :disposition => 'inline'
+      #
+      # Show a 404 page in the browser:
+      #
+      #   send_file '/path/to/404.html', :type => 'text/html; charset=utf-8', :status => 404
+      #
+      # Read about the other Content-* HTTP headers if you'd like to
+      # provide the user with more information (such as Content-Description) in
+      # http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.11.
+      #
+      # Also be aware that the document may be cached by proxies and browsers.
+      # The Pragma and Cache-Control headers declare how the file may be cached
+      # by intermediaries.  They default to require clients to validate with
+      # the server before releasing cached responses.  See
+      # http://www.mnot.net/cache_docs/ for an overview of web caching and
+      # http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9
+      # for the Cache-Control header spec.
+      def send_file(path, options = {}) #:doc:
+        raise MissingFile, "Cannot read file #{path}" unless File.file?(path) and File.readable?(path)
+
+        options[:length]   ||= File.size(path)
+        options[:filename] ||= File.basename(path) unless options[:url_based_filename]
+        send_file_headers! options
+
+        @performed_render = false
+
+        if options[:x_sendfile]
+          logger.info "Sending #{X_SENDFILE_HEADER} header #{path}" if logger
+          head options[:status], X_SENDFILE_HEADER => path
+        else
+          if options[:stream]
+            # TODO : Make render :text => proc {} work with the new base
+            render :status => options[:status], :text => Proc.new { |response, output|
+              logger.info "Streaming file #{path}" unless logger.nil?
+              len = options[:buffer_size] || 4096
+              File.open(path, 'rb') do |file|
+                while buf = file.read(len)
+                  output.write(buf)
+                end
+              end
+            }
+          else
+            logger.info "Sending file #{path}" unless logger.nil?
+            File.open(path, 'rb') { |file| render :status => options[:status], :text => file.read }
+          end
+        end
+      end
+
+      # Sends the given binary data to the browser. This method is similar to
+      # <tt>render :text => data</tt>, but also allows you to specify whether
+      # the browser should display the response as a file attachment (i.e. in a
+      # download dialog) or as inline data. You may also set the content type,
+      # the apparent file name, and other things.
+      #
+      # Options:
+      # * <tt>:filename</tt> - suggests a filename for the browser to use.
+      # * <tt>:type</tt> - specifies an HTTP content type. Defaults to 'application/octet-stream'. You can specify
+      #   either a string or a symbol for a registered type register with <tt>Mime::Type.register</tt>, for example :json
+      # * <tt>:disposition</tt> - specifies whether the file will be shown inline or downloaded.
+      #   Valid values are 'inline' and 'attachment' (default).
+      # * <tt>:status</tt> - specifies the status code to send with the response. Defaults to '200 OK'.
+      #
+      # Generic data download:
+      #
+      #   send_data buffer
+      #
+      # Download a dynamically-generated tarball:
+      #
+      #   send_data generate_tgz('dir'), :filename => 'dir.tgz'
+      #
+      # Display an image Active Record in the browser:
+      #
+      #   send_data image.data, :type => image.content_type, :disposition => 'inline'
+      #
+      # See +send_file+ for more information on HTTP Content-* headers and caching.
+      #
+      # <b>Tip:</b> if you want to stream large amounts of on-the-fly generated
+      # data to the browser, then use <tt>render :text => proc { ... }</tt>
+      # instead. See ActionController::Base#render for more information.
+      def send_data(data, options = {}) #:doc:
+        logger.info "Sending data #{options[:filename]}" if logger
+        send_file_headers! options.merge(:length => data.size)
+        @performed_render = false
+        render :status => options[:status], :text => data
+      end
+
+    private
+      def send_file_headers!(options)
+        options.update(DEFAULT_SEND_FILE_OPTIONS.merge(options))
+        [:length, :type, :disposition].each do |arg|
+          raise ArgumentError, ":#{arg} option required" if options[arg].nil?
+        end
+
+        disposition = options[:disposition].dup || 'attachment'
+
+        disposition <<= %(; filename="#{options[:filename]}") if options[:filename]
+
+        content_type = options[:type]
+
+        if content_type.is_a?(Symbol)
+          raise ArgumentError, "Unknown MIME type #{options[:type]}" unless Mime::EXTENSION_LOOKUP.key?(content_type.to_s)
+          self.content_type = Mime::Type.lookup_by_extension(content_type.to_s)
+        else
+          self.content_type = content_type
+        end
+
+        headers.merge!(
+          'Content-Length'            => options[:length],
+          'Content-Disposition'       => disposition,
+          'Content-Transfer-Encoding' => 'binary'
+        )
+
+        # Fix a problem with IE 6.0 on opening downloaded files:
+        # If Cache-Control: no-cache is set (which Rails does by default),
+        # IE removes the file it just downloaded from its cache immediately
+        # after it displays the "open/save" dialog, which means that if you
+        # hit "open" the file isn't there anymore when the application that
+        # is called for handling the download is run, so let's workaround that
+        headers['Cache-Control'] = 'private' if headers['Cache-Control'] == 'no-cache'
+      end
+  end
+end
diff --git a/actionpack/lib/action_controller/base/verification.rb b/actionpack/lib/action_controller/base/verification.rb
new file mode 100644
index 0000000000..d87b348ed4
--- /dev/null
+++ b/actionpack/lib/action_controller/base/verification.rb
@@ -0,0 +1,133 @@
+module ActionController #:nodoc:
+  module Verification #:nodoc:
+    extend ActiveSupport::Concern
+
+    # TODO : Remove the defined? check when new base is the main base
+    if defined?(ActionController::Http)
+      include AbstractController::Callbacks, Session, Flash, Renderer
+    end
+
+    # This module provides a class-level method for specifying that certain
+    # actions are guarded against being called without certain prerequisites
+    # being met. This is essentially a special kind of before_filter.
+    #
+    # An action may be guarded against being invoked without certain request
+    # parameters being set, or without certain session values existing.
+    #
+    # When a verification is violated, values may be inserted into the flash, and
+    # a specified redirection is triggered. If no specific action is configured,
+    # verification failures will by default result in a 400 Bad Request response.
+    #
+    # Usage:
+    #
+    #   class GlobalController < ActionController::Base
+    #     # Prevent the #update_settings action from being invoked unless
+    #     # the 'admin_privileges' request parameter exists. The
+    #     # settings action will be redirected to in current controller
+    #     # if verification fails.
+    #     verify :params => "admin_privileges", :only => :update_post,
+    #            :redirect_to => { :action => "settings" }
+    #
+    #     # Disallow a post from being updated if there was no information
+    #     # submitted with the post, and if there is no active post in the
+    #     # session, and if there is no "note" key in the flash. The route
+    #     # named category_url will be redirected to if verification fails.
+    #
+    #     verify :params => "post", :session => "post", "flash" => "note",
+    #            :only => :update_post,
+    #            :add_flash => { "alert" => "Failed to create your message" },
+    #            :redirect_to => :category_url
+    #
+    # Note that these prerequisites are not business rules. They do not examine 
+    # the content of the session or the parameters. That level of validation should
+    # be encapsulated by your domain model or helper methods in the controller.
+    module ClassMethods
+      # Verify the given actions so that if certain prerequisites are not met,
+      # the user is redirected to a different action. The +options+ parameter
+      # is a hash consisting of the following key/value pairs:
+      #
+      # <tt>:params</tt>:: 
+      #   a single key or an array of keys that must be in the <tt>params</tt> 
+      #   hash in order for the action(s) to be safely called.
+      # <tt>:session</tt>:: 
+      #   a single key or an array of keys that must be in the <tt>session</tt> 
+      #   in order for the action(s) to be safely called.
+      # <tt>:flash</tt>:: 
+      #   a single key or an array of keys that must be in the flash in order 
+      #   for the action(s) to be safely called.
+      # <tt>:method</tt>:: 
+      #   a single key or an array of keys--any one of which must match the 
+      #   current request method in order for the action(s) to be safely called. 
+      #   (The key should be a symbol: <tt>:get</tt> or <tt>:post</tt>, for 
+      #   example.)
+      # <tt>:xhr</tt>:: 
+      #   true/false option to ensure that the request is coming from an Ajax 
+      #   call or not. 
+      # <tt>:add_flash</tt>:: 
+      #   a hash of name/value pairs that should be merged into the session's 
+      #   flash if the prerequisites cannot be satisfied.
+      # <tt>:add_headers</tt>:: 
+      #   a hash of name/value pairs that should be merged into the response's 
+      #   headers hash if the prerequisites cannot be satisfied.
+      # <tt>:redirect_to</tt>:: 
+      #   the redirection parameters to be used when redirecting if the 
+      #   prerequisites cannot be satisfied. You can redirect either to named 
+      #   route or to the action in some controller.
+      # <tt>:render</tt>:: 
+      #   the render parameters to be used when the prerequisites cannot be satisfied.
+      # <tt>:only</tt>:: 
+      #   only apply this verification to the actions specified in the associated 
+      #   array (may also be a single value).
+      # <tt>:except</tt>:: 
+      #   do not apply this verification to the actions specified in the associated 
+      #   array (may also be a single value).
+      def verify(options={})
+        before_filter :only => options[:only], :except => options[:except] do |c|
+          c.__send__ :verify_action, options
+        end
+      end
+    end
+
+  private
+
+    def verify_action(options) #:nodoc:
+      if prereqs_invalid?(options)
+        flash.update(options[:add_flash])              if options[:add_flash]
+        response.headers.merge!(options[:add_headers]) if options[:add_headers]
+        apply_remaining_actions(options)               unless performed?
+      end
+    end
+    
+    def prereqs_invalid?(options) # :nodoc:
+      verify_presence_of_keys_in_hash_flash_or_params(options) || 
+      verify_method(options) || 
+      verify_request_xhr_status(options)
+    end
+ 
+    def verify_presence_of_keys_in_hash_flash_or_params(options) # :nodoc:
+      [*options[:params] ].find { |v| v && params[v.to_sym].nil?  } ||
+      [*options[:session]].find { |v| session[v].nil? } ||
+      [*options[:flash]  ].find { |v| flash[v].nil?   }
+    end
+    
+    def verify_method(options) # :nodoc:
+      [*options[:method]].all? { |v| request.method != v.to_sym } if options[:method]
+    end
+    
+    def verify_request_xhr_status(options) # :nodoc:
+      request.xhr? != options[:xhr] unless options[:xhr].nil?
+    end
+    
+    def apply_redirect_to(redirect_to_option) # :nodoc:
+      (redirect_to_option.is_a?(Symbol) && redirect_to_option != :back) ? self.__send__(redirect_to_option) : redirect_to_option
+    end
+    
+    def apply_remaining_actions(options) # :nodoc:
+      case
+        when options[:render]      ; render(options[:render])
+        when options[:redirect_to] ; redirect_to(apply_redirect_to(options[:redirect_to]))
+        else head(:bad_request)
+      end
+    end
+  end
+end
\ No newline at end of file