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Contents
# frozen_string_literal: true
require "action_dispatch/middleware/session/abstract_store"
module ActionDispatch
module Session
# 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
# * <tt>cache</tt> - The cache to use. If it is not specified, <tt>Rails.cache</tt> will be used.
# * <tt>expire_after</tt> - The length of time a session will be stored before automatically expiring.
# By default, the <tt>:expires_in</tt> option of the cache is used.
class CacheStore < AbstractSecureStore
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 find_session(env, sid)
unless sid && (session = get_session_with_fallback(sid))
sid, session = generate_sid, {}
end
[sid, session]
end
# Set a session in the cache.
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
# Remove a session from the cache.
def delete_session(env, sid, options)
@cache.delete(cache_key(sid.private_id))
@cache.delete(cache_key(sid.public_id))
generate_sid
end
private
# Turn the session id into a cache key.
def cache_key(id)
"_session_id:#{id}"
end
def get_session_with_fallback(sid)
@cache.read(cache_key(sid.private_id)) || @cache.read(cache_key(sid.public_id))
end
end
end
end
Version data entries
116 entries across 112 versions & 8 rubygems