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require 'rack/utils'
require 'rack/request'
require 'rack/session/abstract/id'
require 'action_dispatch/middleware/cookies'
require 'active_support/core_ext/object/blank'
module ActionDispatch
module Session
class SessionRestoreError < StandardError #:nodoc:
attr_reader :original_exception
def initialize(const_error)
@original_exception = const_error
super("Session contains objects whose class definition isn't available.\n" +
"Remember to require the classes for all objects kept in the session.\n" +
"(Original exception: #{const_error.message} [#{const_error.class}])\n")
end
end
module Compatibility
def initialize(app, options = {})
options[:key] ||= '_session_id'
super
end
def generate_sid
sid = SecureRandom.hex(16)
sid.encode!('UTF-8')
sid
end
protected
def initialize_sid
@default_options.delete(:sidbits)
@default_options.delete(:secure_random)
end
end
module StaleSessionCheck
def load_session(env)
stale_session_check! { super }
end
def extract_session_id(env)
stale_session_check! { super }
end
def stale_session_check!
yield
rescue ArgumentError => argument_error
if argument_error.message =~ %r{undefined class/module ([\w:]*\w)}
begin
# Note that the regexp does not allow $1 to end with a ':'
$1.constantize
rescue LoadError, NameError => e
raise ActionDispatch::Session::SessionRestoreError, e, e.backtrace
end
retry
else
raise
end
end
end
class AbstractStore < Rack::Session::Abstract::ID
include Compatibility
include StaleSessionCheck
ENV_SESSION_KEY = Rack::Session::Abstract::ENV_SESSION_KEY # :nodoc:
ENV_SESSION_OPTIONS_KEY = Rack::Session::Abstract::ENV_SESSION_OPTIONS_KEY # :nodoc:
private
def prepare_session(env)
session_was = env[ENV_SESSION_KEY]
env[ENV_SESSION_KEY] = Request::Session.new(self, env)
env[ENV_SESSION_OPTIONS_KEY] = Request::Session::Options.new(self, env, @default_options)
env[ENV_SESSION_KEY].merge! session_was if session_was
end
def loaded_session?(session)
!session.is_a?(Request::Session) || session.loaded?
end
def set_cookie(env, session_id, cookie)
request = ActionDispatch::Request.new(env)
request.cookie_jar[key] = cookie
end
end
end
class Request
# SessionHash is responsible to lazily load the session from store.
class Session # :nodoc:
ENV_SESSION_KEY = Rack::Session::Abstract::ENV_SESSION_KEY # :nodoc:
ENV_SESSION_OPTIONS_KEY = Rack::Session::Abstract::ENV_SESSION_OPTIONS_KEY # :nodoc:
class Options #:nodoc:
def initialize(by, env, default_options)
@by = by
@env = env
@delegate = default_options
end
def [](key)
if key == :id
@delegate.fetch(key) {
@delegate[:id] = @by.send(:extract_session_id, @env)
}
else
@delegate[key]
end
end
def []=(k,v); @delegate[k] = v; end
def to_hash; @delegate.dup; end
def values_at(*args); @delegate.values_at(*args); end
end
def initialize(by, env)
@by = by
@env = env
@delegate = {}
@loaded = false
end
def destroy
clear
options = @env[ENV_SESSION_OPTIONS_KEY] if @env
options ||= {}
@by.send(:destroy_session, @env, options[:id], options) if @by
options[:id] = nil
@loaded = false
end
def [](key)
load_for_read!
@delegate[key.to_s]
end
def has_key?(key)
load_for_read!
@delegate.key?(key.to_s)
end
alias :key? :has_key?
alias :include? :has_key?
def []=(key, value)
load_for_write!
@delegate[key.to_s] = value
end
def clear
load_for_write!
@delegate.clear
end
def to_hash
load_for_read!
@delegate.dup.delete_if { |_,v| v.nil? }
end
def update(hash)
load_for_write!
@delegate.update stringify_keys(hash)
end
def delete(key)
load_for_write!
@delegate.delete key.to_s
end
def inspect
if loaded?
super
else
"#<#{self.class}:0x#{(object_id << 1).to_s(16)} not yet loaded>"
end
end
def exists?
return @exists if instance_variable_defined?(:@exists)
@exists = @by.send(:session_exists?, @env)
end
def loaded?
@loaded
end
def empty?
load_for_read!
@delegate.empty?
end
private
def load_for_read!
load! if !loaded? && exists?
end
def load_for_write!
load! unless loaded?
end
def load!
id, session = @by.send(:load_session, @env)
@env[ENV_SESSION_OPTIONS_KEY][:id] = id
@delegate.replace(stringify_keys(session))
@loaded = true
end
def stringify_keys(other)
hash = {}
other.each do |key, value|
hash[key.to_s] = value
end
hash
end
end
end
end
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