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# AUTHOR: blink <blinketje@gmail.com>; blink#ruby-lang@irc.freenode.net
# THANKS:
# apeiros, for session id generation, expiry setup, and threadiness
# sergio, threadiness and bugreps
require 'rack/session/abstract/id'
require 'thread'
module Rack
module Session
# Rack::Session::Pool provides simple cookie based session management.
# Session data is stored in a hash held by @pool.
# In the context of a multithreaded environment, sessions being
# committed to the pool is done in a merging manner.
#
# Example:
# myapp = MyRackApp.new
# sessioned = Rack::Session::Pool.new(myapp,
# :key => 'rack.session',
# :domain => 'foo.com',
# :path => '/',
# :expire_after => 2592000
# )
# Rack::Handler::WEBrick.run sessioned
class Pool < Abstract::ID
attr_reader :mutex, :pool
DEFAULT_OPTIONS = Abstract::ID::DEFAULT_OPTIONS.dup
def initialize(app, options={})
super
@pool = Hash.new
@mutex = Mutex.new
end
private
def get_session(env, sid)
session = @mutex.synchronize do
unless sess = @pool[sid] and ((expires = sess[:expire_at]).nil? or expires > Time.now)
@pool.delete_if{|k,v| expiry = v[:expire_at] and expiry < Time.now }
begin
sid = "%08x" % rand(0xffffffff)
end while @pool.has_key?(sid)
end
@pool[sid] ||= {}
end
[sid, session]
end
def set_session(env, sid)
options = env['rack.session.options']
expiry = options[:expire_after] && options[:at]+options[:expire_after]
@mutex.synchronize do
old_session = @pool[sid]
old_session[:expire_at] = expiry if expiry
session = old_session.merge(env['rack.session'])
@pool[sid] = session
session.each do |k,v|
next unless old_session.has_key?(k) and v != old_session[k]
warn "session value assignment collision at #{k}: #{old_session[k]} <- #{v}"
end if $DEBUG and env['rack.multithread']
end
return true
rescue
warn "#{self} is unable to find server."
warn "#{env['rack.session'].inspect} has been lost."
warn $!.inspect
return false
end
end
end
end
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