require 'rack/utils'
module ActionController
module Session
class AbstractStore
ENV_SESSION_KEY = 'rack.session'.freeze
ENV_SESSION_OPTIONS_KEY = 'rack.session.options'.freeze
HTTP_COOKIE = 'HTTP_COOKIE'.freeze
SET_COOKIE = 'Set-Cookie'.freeze
class SessionHash < Hash
def initialize(by, env)
super()
@by = by
@env = env
@loaded = false
end
def session_id
ActiveSupport::Deprecation.warn(
"ActionController::Session::AbstractStore::SessionHash#session_id " +
"has been deprecated. Please use request.session_options[:id] instead.", caller)
@env[ENV_SESSION_OPTIONS_KEY][:id]
end
def [](key)
load! unless @loaded
super
end
def []=(key, value)
load! unless @loaded
super
end
def to_hash
h = {}.replace(self)
h.delete_if { |k,v| v.nil? }
h
end
def data
ActiveSupport::Deprecation.warn(
"ActionController::Session::AbstractStore::SessionHash#data " +
"has been deprecated. Please use #to_hash instead.", caller)
to_hash
end
private
def loaded?
@loaded
end
def load!
stale_session_check! do
id, session = @by.send(:load_session, @env)
(@env[ENV_SESSION_OPTIONS_KEY] ||= {})[:id] = id
replace(session)
@loaded = true
end
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 => const_error
raise ActionController::SessionRestoreError, "Session contains objects whose class definition isn\\'t available.\nRemember to require the classes for all objects kept in the session.\n(Original exception: \#{const_error.message} [\#{const_error.class}])\n"
end
retry
else
raise
end
end
end
DEFAULT_OPTIONS = {
:key => '_session_id',
:path => '/',
:domain => nil,
:expire_after => nil,
:secure => false,
:httponly => true,
:cookie_only => true
}
def initialize(app, options = {})
# Process legacy CGI options
options = options.symbolize_keys
if options.has_key?(:session_path)
options[:path] = options.delete(:session_path)
end
if options.has_key?(:session_key)
options[:key] = options.delete(:session_key)
end
if options.has_key?(:session_http_only)
options[:httponly] = options.delete(:session_http_only)
end
@app = app
@default_options = DEFAULT_OPTIONS.merge(options)
@key = @default_options[:key]
@cookie_only = @default_options[:cookie_only]
end
def call(env)
session = SessionHash.new(self, env)
env[ENV_SESSION_KEY] = session
env[ENV_SESSION_OPTIONS_KEY] = @default_options.dup
response = @app.call(env)
session_data = env[ENV_SESSION_KEY]
options = env[ENV_SESSION_OPTIONS_KEY]
if !session_data.is_a?(AbstractStore::SessionHash) || session_data.send(:loaded?) || options[:expire_after]
session_data.send(:load!) if session_data.is_a?(AbstractStore::SessionHash) && !session_data.send(:loaded?)
sid = options[:id] || generate_sid
unless set_session(env, sid, session_data.to_hash)
return response
end
cookie = Rack::Utils.escape(@key) + '=' + Rack::Utils.escape(sid)
cookie << "; domain=#{options[:domain]}" if options[:domain]
cookie << "; path=#{options[:path]}" if options[:path]
if options[:expire_after]
expiry = Time.now + options[:expire_after]
cookie << "; expires=#{expiry.httpdate}"
end
cookie << "; Secure" if options[:secure]
cookie << "; HttpOnly" if options[:httponly]
headers = response[1]
case a = headers[SET_COOKIE]
when Array
a << cookie
when String
headers[SET_COOKIE] = [a, cookie]
when nil
headers[SET_COOKIE] = cookie
end
end
response
end
private
def generate_sid
ActiveSupport::SecureRandom.hex(16)
end
def load_session(env)
request = Rack::Request.new(env)
sid = request.cookies[@key]
unless @cookie_only
sid ||= request.params[@key]
end
sid, session = get_session(env, sid)
[sid, session]
end
def get_session(env, sid)
raise '#get_session needs to be implemented.'
end
def set_session(env, sid, session_data)
raise '#set_session needs to be implemented.'
end
end
end
end
