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require 'action_controller/session/cookie_store'
require 'action_controller/session/drb_store'
require 'action_controller/session/mem_cache_store'
if Object.const_defined?(:ActiveRecord)
require 'action_controller/session/active_record_store'
end
module ActionController #:nodoc:
module SessionManagement #:nodoc:
def self.included(base)
base.class_eval do
extend ClassMethods
alias_method_chain :process, :session_management_support
alias_method_chain :process_cleanup, :session_management_support
end
end
module ClassMethods
# Set the session store to be used for keeping the session data between requests. The default is using the
# file system, but you can also specify one of the other included stores (:active_record_store, :drb_store,
# :mem_cache_store, or :memory_store) or use your own class.
def session_store=(store)
ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS[:database_manager] =
store.is_a?(Symbol) ? CGI::Session.const_get(store == :drb_store ? "DRbStore" : store.to_s.camelize) : store
end
# Returns the session store class currently used.
def session_store
ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS[:database_manager]
end
# Returns the hash used to configure the session. Example use:
#
# ActionController::Base.session_options[:session_secure] = true # session only available over HTTPS
def session_options
ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS
end
# Specify how sessions ought to be managed for a subset of the actions on
# the controller. Like filters, you can specify <tt>:only</tt> and
# <tt>:except</tt> clauses to restrict the subset, otherwise options
# apply to all actions on this controller.
#
# The session options are inheritable, as well, so if you specify them in
# a parent controller, they apply to controllers that extend the parent.
#
# Usage:
#
# # turn off session management for all actions.
# session :off
#
# # turn off session management for all actions _except_ foo and bar.
# session :off, :except => %w(foo bar)
#
# # turn off session management for only the foo and bar actions.
# session :off, :only => %w(foo bar)
#
# # the session will only work over HTTPS, but only for the foo action
# session :only => :foo, :session_secure => true
#
# # the session will only be disabled for 'foo', and only if it is
# # requested as a web service
# session :off, :only => :foo,
# :if => Proc.new { |req| req.parameters[:ws] }
#
# # the session will be disabled for non html/ajax requests
# session :off,
# :if => Proc.new { |req| !(req.format.html? || req.format.js?) }
#
# All session options described for ActionController::Base.process_cgi
# are valid arguments.
def session(*args)
options = args.extract_options!
options[:disabled] = true if !args.empty?
options[:only] = [*options[:only]].map { |o| o.to_s } if options[:only]
options[:except] = [*options[:except]].map { |o| o.to_s } if options[:except]
if options[:only] && options[:except]
raise ArgumentError, "only one of either :only or :except are allowed"
end
write_inheritable_array("session_options", [options])
end
# So we can declare session options in the Rails initializer.
alias_method :session=, :session
def cached_session_options #:nodoc:
@session_options ||= read_inheritable_attribute("session_options") || []
end
def session_options_for(request, action) #:nodoc:
if (session_options = cached_session_options).empty?
{}
else
options = {}
action = action.to_s
session_options.each do |opts|
next if opts[:if] && !opts[:if].call(request)
if opts[:only] && opts[:only].include?(action)
options.merge!(opts)
elsif opts[:except] && !opts[:except].include?(action)
options.merge!(opts)
elsif !opts[:only] && !opts[:except]
options.merge!(opts)
end
end
if options.empty? then options
else
options.delete :only
options.delete :except
options.delete :if
options[:disabled] ? false : options
end
end
end
end
def process_with_session_management_support(request, response, method = :perform_action, *arguments) #:nodoc:
set_session_options(request)
process_without_session_management_support(request, response, method, *arguments)
end
private
def set_session_options(request)
request.session_options = self.class.session_options_for(request, request.parameters["action"] || "index")
end
def process_cleanup_with_session_management_support
clear_persistent_model_associations
process_cleanup_without_session_management_support
end
# Clear cached associations in session data so they don't overflow
# the database field. Only applies to ActiveRecordStore since there
# is not a standard way to iterate over session data.
def clear_persistent_model_associations #:doc:
if defined?(@_session) && @_session.respond_to?(:data)
session_data = @_session.data
if session_data && session_data.respond_to?(:each_value)
session_data.each_value do |obj|
obj.clear_association_cache if obj.respond_to?(:clear_association_cache)
end
end
end
end
end
end
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