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HTTP State Management Mechanism RFC ( Request for Comments ) 2965, October 2000. This document reflects implementation experience with RFC 2109 and obsoletes it. This document describes a way to create stateful sessions with HTTP requests and responses. Currently, HTTP servers respond to each client request without relating that request to previous or subsequent requests; the state management mechanism allows clients and servers that wish to exchange state information to place HTTP requests and responses within a larger context, which we term a "session". This context might be used to create, for example, a "shopping cart", in which user selections can be aggregated before purchase, or a magazine browsing system, in which a user's previous reading affects which offerings are presented. Neither clients nor servers are required to support cookies. A server MAY refuse to provide content to a client that does not return the cookies it sends.
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