session.py 文件源码

def __init__(self, request, key='beaker.session.id', timeout=None,
                 cookie_expires=True, cookie_domain=None, encrypt_key=None,
                 validate_key=None, secure=False, **kwargs):

        if not crypto.has_aes and encrypt_key:
            raise InvalidCryptoBackendError("No AES library is installed, can't generate "
                                  "encrypted cookie-only Session.")

        self.request = request
        self.key = key
        self.timeout = timeout
        self.cookie_expires = cookie_expires
        self.encrypt_key = encrypt_key
        self.validate_key = validate_key
        self.request['set_cookie'] = False
        self.secure = secure
        self._domain = cookie_domain
        self._path = '/'

        try:
            cookieheader = request['cookie']
        except KeyError:
            cookieheader = ''

        if validate_key is None:
            raise BeakerException("No validate_key specified for Cookie only "
                                  "Session.")

        try:
            self.cookie = SignedCookie(validate_key, input=cookieheader)
        except Cookie.CookieError:
            self.cookie = SignedCookie(validate_key, input=None)

        self['_id'] = self._make_id()
        self.is_new = True

        # If we have a cookie, load it
        if self.key in self.cookie and self.cookie[self.key].value is not None:
            self.is_new = False
            try:
                self.update(self._decrypt_data())
            except:
                pass
            if self.timeout is not None and time.time() - \
               self['_accessed_time'] > self.timeout:
                self.clear()
            self.accessed_dict = self.copy()
            self._create_cookie()