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Class: ActionDispatch::Session::CacheStore

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, AbstractSecureStore, Rack::Session::Abstract::PersistedSecure
Instance Chain:
self, AbstractSecureStore, SessionObject, StaleSessionCheck, Compatibility, Rack::Session::Abstract::PersistedSecure
Inherits: ActionDispatch::Session::AbstractSecureStore
Defined in: actionpack/lib/action_dispatch/middleware/session/cache_store.rb

Overview

A 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.

Options

  • cache - The cache to use. If it is not specified, Rails.cache will be used.

  • expire_after - The length of time a session will be stored before automatically expiring. By default, the :expires_in option of the cache is used.

Class Method Summary

Instance Method Summary

AbstractSecureStore - Inherited

#generate_sid, #set_cookie

SessionObject - Included

#commit_session, #loaded_session?, #prepare_session

StaleSessionCheck - Included

#extract_session_id, #load_session, #stale_session_check!

Compatibility - Included

#generate_sid, #initialize, #initialize_sid, #make_request

Constructor Details

.new(app, options = {}) ⇒ CacheStore

[ GitHub ] 

  


# File 'actionpack/lib/action_dispatch/middleware/session/cache_store.rb', line 23



def initialize(app, options = {})
  @cache = options[:cache] || Rails.cache
  options[:expire_after] ||= @cache.options[:expires_in]
  super
end


  







Instance Method Details



  

    #cache_key(id)   (private)
  



  

    

Turn the session id into a cache key.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/middleware/session/cache_store.rb', line 57



def cache_key(id)
  "_session_id:#{id}"
end


  








  

    #delete_session(env, sid, options)  
  



  

    

Remove a session from the cache.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/middleware/session/cache_store.rb', line 49



def delete_session(env, sid, options)
  @cache.delete(cache_key(sid.private_id))
  @cache.delete(cache_key(sid.public_id))
  generate_sid
end


  








  

    #find_session(env, sid)  
  



  

    

Get a session from the cache.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/middleware/session/cache_store.rb', line 30



def find_session(env, sid)
  unless sid && (session = get_session_with_fallback(sid))
    sid, session = generate_sid, {}
  end
  [sid, session]
end


  








  

    #get_session_with_fallback(sid)   (private)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/middleware/session/cache_store.rb', line 61



def get_session_with_fallback(sid)
  @cache.read(cache_key(sid.private_id)) || @cache.read(cache_key(sid.public_id))
end


  








  

    #write_session(env, sid, session, options)  
  



  

    

Set a session in the cache.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/middleware/session/cache_store.rb', line 38



def write_session(env, sid, session, options)
  key = cache_key(sid.private_id)
  if session
    @cache.write(key, session, expires_in: options[:expire_after])
  else
    @cache.delete(key)
  end
  sid
end