SSL requirement adds a declarative way of specifying that certain act…

…ions should only be allowed to run under SSL, and if theyre accessed without it, they should be redirected.

README

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+SSL Requirement
+===============
+
+SSL requirement adds a declarative way of specifying that certain actions should
+only be allowed to run under SSL, and if they're accessed without it, they should
+be redirected.
+
+The methods are: account_url, account_host, and account_domain.
+
+Example:
+
+  class ApplicationController < ActiveRecord::Base
+    include SslRequirement
+  end
+
+  class AccountController < ApplicationController
+    ssl_required :signup, :payment
+
+    def signup
+      # Non-SSL access will be redirected to SSL
+    end
+
+    def payment
+      # Non-SSL access will be redirected to SSL
+    end
+  end
+
+You can overwrite the protected method ssl_required? to rely on other things than
+just the declarative specification. Say, only premium accounts get SSL.
+
+P.S.: Beware when you include the SslRequirement module. At the time of inclusion,
+it'll add the before_filter that validates the declarations. Some times you'll want to
+run other before_filters before that. They should then be declared ahead of including
+this module.
+
+Copyright (c) 2005 David Heinemeier Hansson, released under the MIT license

lib/ssl_requirement.rb

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+# Copyright (c) 2005 David Heinemeier Hansson
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+module SslRequirement
+  def self.included(controller)
+    controller.extend(ClassMethods)
+    controller.before_filter(:ensure_proper_protocol)
+  end
+
+  module ClassMethods
+    # Specifies that the named actions requires an SSL connection to be performed (which is enforced by ensure_proper_protocol).
+    def ssl_required(*actions)
+      write_inheritable_array(:ssl_required_actions, actions)
+    end
+  end
+
+  protected
+    # Returns true if the current action is supposed to run as SSL
+    def ssl_required?
+      (self.class.read_inheritable_attribute(:ssl_required_actions) || []).include?(action_name.to_sym)
+    end
+
+  private
+    def ensure_proper_protocol
+      if ssl_required? && !request.ssl?
+        redirect_to "https://" + request.host + request.request_uri
+        return false
+      elsif request.ssl? && !ssl_required?
+        redirect_to "http://" + request.host + request.request_uri
+        return false
+      end
+    end
+end