Zend_Http_Cookie is a class describing an HTTP cookie and all it's parameters.
A Zend_Http_Cookiejar object is designed to contain and maintain HTTP cookies, and should be used along with Zend_Http_Client in order to manage cookies across HTTP requests and responses.
Zend_Http_Response represents an HTTP 1.0 / 1.1 response message. It includes easy access to all the response's different elemts, as well as some convenience methods for parsing and validating HTTP responses.