18.23 Cookie -- HTTP state management

Python 2.5

18.23 Cookie -- HTTP state management

The Cookie module defines classes for abstracting the concept of cookies, an HTTP state management mechanism. It supports both simple string-only cookies, and provides an abstraction for having any serializable data-type as cookie value.

The module formerly strictly applied the parsing rules described in the RFC 2109 and RFC 2068 specifications. It has since been discovered that MSIE 3.0x doesn't follow the character rules outlined in those specs. As a result, the parsing rules used are a bit less strict.

Exception failing because of RFC 2109 invalidity: incorrect attributes, incorrect Set-Cookie: header, etc.

This class is a dictionary-like object whose keys are strings and whose values are Morsel instances. Note that upon setting a key to a value, the value is first converted to a Morsel containing the key and the value.

If input is given, it is passed to the load() method.

This class derives from BaseCookie and overrides value_decode() and value_encode() to be the identity and str() respectively.

This class derives from BaseCookie and overrides value_decode() and value_encode() to be the pickle.loads() and pickle.dumps().

This class derives from BaseCookie. It overrides value_decode() to be pickle.loads() if it is a valid pickle, and otherwise the value itself. It overrides value_encode() to be pickle.dumps() unless it is a string, in which case it returns the value itself.

A further security note is warranted. For backwards compatibility, the Cookie module exports a class named Cookie which is just an alias for SmartCookie. This is probably a mistake and will likely be removed in a future version. You should not use the Cookie class in your applications, for the same reason why you should not use the SerialCookie class.

See Also:

HTTP cookie handling for web clients. The cookielib and Cookie modules do not depend on each other.

This is the state management specification implemented by this module.


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