class CGI::Session::PStore

not exist, or opened if it does.
This session's PStore file will be created if it does

Defaults to the empty string.
the filename for this session's PStore file.
prefix:: the prefix to add to the session id when generating
on Unix systems).
file. Defaults to Dir::tmpdir (generally "/tmp"
tmpdir:: the directory to use for storing the PStore

following options are recognised:
+option+ is a hash of options for the initializer. The

this requirement.
characters; automatically generated session ids observe
created. The session id must only contain alphanumeric
+session+ is the session for which this instance is being

user does not generally need to call it directly.
This constructor is used internally by CGI::Session. The

Create a new CGI::Session::PStore instance

def initialize(session, option={})
  dir = option['tmpdir'] || Dir::tmpdir
  prefix = option['prefix'] || ''
  id = session.session_id
  require 'digest/md5'
  md5 = Digest::MD5.hexdigest(id)[0,16]
  path = dir+"/"+prefix+md5
  if File::exist?(path)
    @hash = nil
  else
    unless session.new_session
      raise CGI::Session::NoSession, "uninitialized session"
    end
    @hash = {}
  end
  @p = ::PStore.new(path)
  @p.transaction do |p|
    File.chmod(0600, p.path)
  end
end