State Maintenance
Robert E. Beasley · Apress eBooks · 2020
State maintenance is the process of preserving the state of an end user’s data as he or she navigates the pages of a Web application. This process is necessary because client-server Web applications are stateless , which means that once a server serves a page to a client, the server completely forgets about the client, the page it just served, and the state of any data associated with the page. In other words, once a page has been requested by the client via an HTTP request, and once the server has responded with the page via an HTTP response, any connection between the client and the server is lost. In fact, each new page request results in the creation and return of a brand new page, whether the end user is re-requesting the page he or she is currently on or is requesting a completely different page.