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Linux.com: Unix Web Application Architectures - Part 3: Sessions, Authentication, and Databases

Sep 20, 2000, 19:54 (1 Talkback[s])
(Other stories by Samuli Kärkkäinen)


Desktop-as-a-Service Designed for Any Cloud ? Nutanix Frame

"With a session I mean the series of HTTP requests/replies that one user makes when visiting a site. In the example application, a session would begin when a customer logs on in the system, and end when the customer logs off or just closes his browser."

"Session state is all relevant information about what the user has already done during that session. In our example application, the following session state data might be kept...."

"Session management is a significant and very fundamental issue with web applications, because HTTP is a completely stateless protocol. Each HTTP request has no relation with any other HTTP request (aside from possibly using the same TCP connection). Therefore, it's the job of the application to create this association. In traditional GUI programming, each screen element is represented by a GUI toolkit object that holds all the data and state of the screen element. In web applications, this data must be kept somewhere else."

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