From 2b04c2f66e3cf5abbbf118eaa1e692b9e1380e4e Mon Sep 17 00:00:00 2001 From: Brian Durand Date: Fri, 21 Oct 2011 13:13:29 -0500 Subject: Add ActionDispatch::Session::CacheStore as a generic way of storing sessions in a cache. --- actionpack/lib/action_dispatch.rb | 1 + .../middleware/session/cache_store.rb | 50 ++++++ .../test/dispatch/session/cache_store_test.rb | 181 +++++++++++++++++++++ 3 files changed, 232 insertions(+) create mode 100644 actionpack/lib/action_dispatch/middleware/session/cache_store.rb create mode 100644 actionpack/test/dispatch/session/cache_store_test.rb (limited to 'actionpack') diff --git a/actionpack/lib/action_dispatch.rb b/actionpack/lib/action_dispatch.rb index c13850f378..1e92d14542 100644 --- a/actionpack/lib/action_dispatch.rb +++ b/actionpack/lib/action_dispatch.rb @@ -83,6 +83,7 @@ module ActionDispatch autoload :AbstractStore, 'action_dispatch/middleware/session/abstract_store' autoload :CookieStore, 'action_dispatch/middleware/session/cookie_store' autoload :MemCacheStore, 'action_dispatch/middleware/session/mem_cache_store' + autoload :CacheStore, 'action_dispatch/middleware/session/cache_store' end autoload_under 'testing' do diff --git a/actionpack/lib/action_dispatch/middleware/session/cache_store.rb b/actionpack/lib/action_dispatch/middleware/session/cache_store.rb new file mode 100644 index 0000000000..d3b6fd12fa --- /dev/null +++ b/actionpack/lib/action_dispatch/middleware/session/cache_store.rb @@ -0,0 +1,50 @@ +require 'action_dispatch/middleware/session/abstract_store' +require 'rack/session/memcache' + +module ActionDispatch + module Session + # Session store that uses an ActiveSupport::Cache::Store to store the sessions. This store is most useful + # if you don't store critical data in your sessions and you don't need them to live for extended periods + # of time. + class CacheStore < AbstractStore + # Create a new store. The cache to use can be passed in the :cache option. If it is + # not specified, Rails.cache will be used. + def initialize(app, options = {}) + @cache = options[:cache] || Rails.cache + options[:expire_after] ||= @cache.options[:expires_in] + super + end + + # Get a session from the cache. + def get_session(env, sid) + sid ||= generate_sid + session = @cache.read(cache_key(sid)) + session ||= {} + [sid, session] + end + + # Set a session in the cache. + def set_session(env, sid, session, options) + key = cache_key(sid) + if session + @cache.write(key, session, :expires_in => options[:expire_after]) + else + @cache.delete(key) + end + sid + end + + # Remove a session from the cache. + def destroy_session(env, sid, options) + @cache.delete(cache_key(sid)) + generate_sid + end + + private + # Turn the session id into a cache key. + def cache_key(sid) + "_session_id:#{sid}" + end + end + end +end diff --git a/actionpack/test/dispatch/session/cache_store_test.rb b/actionpack/test/dispatch/session/cache_store_test.rb new file mode 100644 index 0000000000..73e056de23 --- /dev/null +++ b/actionpack/test/dispatch/session/cache_store_test.rb @@ -0,0 +1,181 @@ +require 'abstract_unit' + +class CacheStoreTest < ActionDispatch::IntegrationTest + class TestController < ActionController::Base + def no_session_access + head :ok + end + + def set_session_value + session[:foo] = "bar" + head :ok + end + + def set_serialized_session_value + session[:foo] = SessionAutoloadTest::Foo.new + head :ok + end + + def get_session_value + render :text => "foo: #{session[:foo].inspect}" + end + + def get_session_id + render :text => "#{request.session_options[:id]}" + end + + def call_reset_session + session[:bar] + reset_session + session[:bar] = "baz" + head :ok + end + + def rescue_action(e) raise end + end + + def test_setting_and_getting_session_value + with_test_route_set do + get '/set_session_value' + assert_response :success + assert cookies['_session_id'] + + get '/get_session_value' + assert_response :success + assert_equal 'foo: "bar"', response.body + end + end + + def test_getting_nil_session_value + with_test_route_set do + get '/get_session_value' + assert_response :success + assert_equal 'foo: nil', response.body + end + end + + def test_getting_session_value_after_session_reset + with_test_route_set do + get '/set_session_value' + assert_response :success + assert cookies['_session_id'] + session_cookie = cookies.send(:hash_for)['_session_id'] + + get '/call_reset_session' + assert_response :success + assert_not_equal [], headers['Set-Cookie'] + + cookies << session_cookie # replace our new session_id with our old, pre-reset session_id + + get '/get_session_value' + assert_response :success + assert_equal 'foo: nil', response.body, "data for this session should have been obliterated from cache" + end + end + + def test_getting_from_nonexistent_session + with_test_route_set do + get '/get_session_value' + assert_response :success + assert_equal 'foo: nil', response.body + assert_nil cookies['_session_id'], "should only create session on write, not read" + end + end + + def test_setting_session_value_after_session_reset + with_test_route_set do + get '/set_session_value' + assert_response :success + assert cookies['_session_id'] + session_id = cookies['_session_id'] + + get '/call_reset_session' + assert_response :success + assert_not_equal [], headers['Set-Cookie'] + + get '/get_session_value' + assert_response :success + assert_equal 'foo: nil', response.body + + get '/get_session_id' + assert_response :success + assert_not_equal session_id, response.body + end + end + + def test_getting_session_id + with_test_route_set do + get '/set_session_value' + assert_response :success + assert cookies['_session_id'] + session_id = cookies['_session_id'] + + get '/get_session_id' + assert_response :success + assert_equal session_id, response.body, "should be able to read session id without accessing the session hash" + end + end + + def test_deserializes_unloaded_class + with_test_route_set do + with_autoload_path "session_autoload_test" do + get '/set_serialized_session_value' + assert_response :success + assert cookies['_session_id'] + end + with_autoload_path "session_autoload_test" do + get '/get_session_id' + assert_response :success + end + with_autoload_path "session_autoload_test" do + get '/get_session_value' + assert_response :success + assert_equal 'foo: #', response.body, "should auto-load unloaded class" + end + end + end + + def test_doesnt_write_session_cookie_if_session_id_is_already_exists + with_test_route_set do + get '/set_session_value' + assert_response :success + assert cookies['_session_id'] + + get '/get_session_value' + assert_response :success + assert_equal nil, headers['Set-Cookie'], "should not resend the cookie again if session_id cookie is already exists" + end + end + + def test_prevents_session_fixation + with_test_route_set do + get '/get_session_value' + assert_response :success + assert_equal 'foo: nil', response.body + session_id = cookies['_session_id'] + + reset! + + get '/set_session_value', :_session_id => session_id + assert_response :success + assert_not_equal session_id, cookies['_session_id'] + end + end + + private + def with_test_route_set + with_routing do |set| + set.draw do + match ':action', :to => ::CacheStoreTest::TestController + end + + @app = self.class.build_app(set) do |middleware| + cache = ActiveSupport::Cache::MemoryStore.new + middleware.use ActionDispatch::Session::CacheStore, :key => '_session_id', :cache => cache + middleware.delete "ActionDispatch::ShowExceptions" + end + + yield + end + end +end -- cgit v1.2.3