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System and method for managing client application state in a stateless web browser environment
| Details |
Inventors: Hoffman, Richard Dale;
Assignee: International Business Machines Corporation (Armonk, NY)
Primary Examiner: Rinehart; Mark H.
Assistant Examiner: Thompson; Marc D.
Attorney, Agent or Firm: Yee; Duke W., LaBaw; Jeffrey S., Walder, Jr.; Stephen J.
A system and method for maintaining application state information in a stateless environment. State data of arbitrary length is stored in a storage area at a location referenced by a storage handle. The storage handle is recorded by the application and is used to reaccess the data as required. The storage handle is defined as a short fixed length field enabling compact reference and use regardless of the amount of data stored. Storage space is periodically reclaimed and reused after being freed by the application. |
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DETAILED DESCRIPTION The expanded use of the Internet for business and personal transactions has led to a continued expansion of the number of applications executable over the Internet.
Complex applications including travel reservation and ticketing and banking from home require software programs that are themselves complex.
Application programming of network applications is made more difficult by the stateless environment of the Internet.
Each request from the client browser is processed by an application independently and without knowledge of any previous interaction with that client.
The client browser may supply previous state information with the request, though this is limited by network capacity and browser and server software limitations.
A simplified view of client/server interaction is shown in FIG.
1.
A client system 102 has a network browser 104 for displaying data accessed from the Internet.
The client system can be any computer system capable of connecting to a network and executing browser software.
Examples of such systems include IBM Personal Computers, Apple Macintosh computers, and various Intel microprocessor based computers from Compaq, Dell and others.
In addition, workstations such as the IBM RS/6000 workstation, and workstations from Sun Microsystems, and Hewlett-Packard may be used.
Browsers include the Netscape Navigator and Netscape Communicator from Netscape Communications, the Microsoft Internet Explorers and others.
Client 102 is connected through a network 106 to a server 110.
The server can be hosted by the computers listed above and includes server software 112 such as Netscape SuiteSpot, Microsoft Internet Server, IBM Internet Connection Server, and Lotus Domino server.
The server software must be responsive to requests made using the Hypertext Transfer Protocol (HTTP).
The preferred embodiment of the present invention operates in a server that supports JavaScript, the interpretive programming language developed by Netscape Communications to implement complex logic in a web server
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File Sharing 
