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Modify the session serializer implementation

Rename allowed options to :marshal and :json, for custom serializers
only allow the use of custom classes.
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guilleiguaran committed Jan 30, 2014
1 parent db5d6bf commit fd487860db3097104cdb8d589f3931d75b767721
@@ -1,14 +1,15 @@
* Add `:serializer` option for `config.session_store :cookie_store`. This
changes default serializer when using `:cookie_store` to
`ActionDispatch::Session::MarshalSerializer` which is wrapper on Marshal.
changes default serializer when using `:cookie_store`.
It is also possible to pass:
It is possible to pass:
* `:json_serializer` which is secure wrapper on JSON using `JSON.parse` and
* `:json` which is a secure wrapper on JSON using `JSON.parse` and
`JSON.generate` methods with quirks mode;
* any other Symbol or String like `:my_custom_serializer` which will be
camelized and constantized in `ActionDispatch::Session` namespace;
* serializer object with `load` and `dump` methods defined.
* `:marshal` which is a wrapper on Marshal;
* serializer class with `load` and `dump` methods defined.
For new apps `:json` option is added by default and :marshal is used
when no option is specified.
*Łukasz Sarnacki + Matt Aimonetti*
@@ -466,10 +466,12 @@ def decrypt_and_verify(encrypted_message)
def serializer
serializer = @options[:session_serializer] || :marshal_serializer
serializer = @options[:session_serializer] || :marshal
case serializer
when Symbol, String
when :marshal
when :json
@@ -379,7 +379,7 @@ def test_encrypted_cookie
assert_equal 'bar', cookies.encrypted[:foo]
class ActionDispatch::Session::CustomJsonSerializer
class CustomJsonSerializer
def self.load(value)
JSON.load(value) + " and loaded"
@@ -389,20 +389,14 @@ def self.dump(value)
def test_encrypted_cookie_using_custom_json_serializer
@request.env["action_dispatch.session_serializer"] = :custom_json_serializer
get :set_encrypted_cookie
assert_equal 'bar was dumped and loaded', cookies.encrypted[:foo]
def test_encrypted_cookie_using_serializer_object
@request.env["action_dispatch.session_serializer"] = ActionDispatch::Session::CustomJsonSerializer
@request.env["action_dispatch.session_serializer"] = CustomJsonSerializer
get :set_encrypted_cookie
assert_equal 'bar was dumped and loaded', cookies.encrypted[:foo]
def test_encrypted_cookie_using_json_serializer
@request.env["action_dispatch.session_serializer"] = :json_serializer
@request.env["action_dispatch.session_serializer"] = :json
get :set_encrypted_cookie
cookies = @controller.send :cookies
assert_not_equal 'bar', cookies[:foo]
@@ -384,20 +384,14 @@ YourApp::Application.config.session_store :cookie_store, key: '_your_app_session
You can pass `:serializer` key to specify serializer for serializing session:
YourApp::Application.config.session_store :cookie_store, key: '_your_app_session', serializer: :json_serializer
YourApp::Application.config.session_store :cookie_store, key: '_your_app_session', serializer: :json
Default serializer is `:marshal_serializer`. When Symbol or String is passed it
will look for appropriate class in `ActionDispatch::Session` namespace, so
passing `:my_custom_serializer` would load
The default serializer for new application is `:json`. For compatibility with
old applications `:marshal` is used when `serializer` option is not specified.
YourApp::Application.config.session_store :cookie_store, key: '_your_app_session', serializer: :my_custom_serializer
It is also possible to pass serializer object with defined `load` and `dump`
public methods:
It is also possible to pass a custom serializer class with `load` and `dump`
public methods defined:
YourApp::Application.config.session_store :cookie_store, key: '_your_app_session', serializer: MyCustomSerializer
@@ -1,3 +1,3 @@
# Be sure to restart your server when you modify this file.
Rails.application.config.session_store :cookie_store, key: <%= "'_#{app_name}_session'" %>, serializer: :json_serializer
Rails.application.config.session_store :cookie_store, key: <%= "'_#{app_name}_session'" %>, serializer: :json
@@ -433,7 +433,7 @@ def test_no_active_record_or_test_unit_if_skips_given
def test_new_hash_style
run_generator [destination_root]
assert_file "config/initializers/session_store.rb" do |file|
assert_match(/config.session_store :cookie_store, key: '_.+_session', serializer: :json_serializer/, file)
assert_match(/config.session_store :cookie_store, key: '_.+_session', serializer: :json/, file)

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