Method, system and program product for asynchronously processing requests

• US 7,756,982 B2
• Filed: 02/20/2008
• Issued: 07/13/2010
• Est. Priority Date: 07/31/2003
• Status: Expired due to Term

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: International Business Machines Corporation
• Inventors: Johnson, David Phillip
• Primary Examiner(s): Lim; Krisna
• Application Number:
  US12/034,426
• Publication Number:
  US 20080140774A1
• Time in Patent Office: 874 Days
• Field of Search: 709/227, 709/223, 709/226, 711/133, 711/134, 711/137
• US Class Current: 709/227
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

Under the present invention, a request for a Uniform Resource Locator (URL) is received from a client on a server. Upon receipt, a corresponding session object is obtained, and a response identifier is generated. Based on the response identifier, it is determined whether the URL was previously requested by the client. If not, generation of a final response begins. As the response is being generated, a response refresh header is generated and returned to the client with a temporary response. The response refresh header contains a time value for causing the client to automatically send a subsequent request for the URL. After generation of the final response is complete, it is stored in a cache according to the response identifier. Then, when the subsequent request is received from the client, the final response is retrieved from the cache and served to the client.

Claims

1. A method for asynchronously processing requests, comprising:

obtaining a session object for a request for a Uniform Resource Locator (URL) received from a client;

generating a response identifier based on a session identifier and the URL;

determining if the URL was previously requested in the request by the client based on the response identifier;

generating a response refresh header that includes a time value for causing the client to automatically send a subsequent request for the URL; and

sending a temporary response to the request and the response refresh header to the client.

2. The method of claim 1, further comprising sending the request to a response caching system with an instruction to cache a final response to the request according to the response identifier.

3. The method of claim 1, wherein the request is a web request.

4. The method of claim 1, wherein the response identifier comprises the session identifier and a hash of the URL.

5. The method of claim 1, further comprising:

determining if a final response to the request is complete, prior to the generating step; and

sending the final response to the client if the final response is complete, wherein the refresh header is not generated and sent to the client with the temporary response if the final response is complete.

6. The method of claim 1, further comprising:

commencing generation of a final response to the request; and

storing the final response in a cache according to the response identifier when the final response is complete.

7. The method of claim 6, further comprising:

receiving a subsequent request for the URL from the client after expiration of the time value in the response refresh header;

obtaining the session object;

generating the response identifier;

determining whether the URL was previously requested based on the response identifier;

checking the cache for the final response to request based on the response identifier; and

sending the final response to the client if the final response complete, wherein a new refresh header is generated and sent to the client with a new temporary response if the final response is not complete.

8. The method of claim 1, wherein the determining step comprises checking a table in the session object for the response identifier to determine if the URL was previously requested by the client.

9. A method for asynchronously processing requests, comprising:

obtaining a session object for a request for a Uniform Resource Locator (URL) received from a client;

generating a response identifier based on a session identifier and the URL;

determining if the URL was previously requested in the request by the client based on the response identifier;

checking a cache for a final response to the request based on the response identifier, if the URL was previously requested by the client;

generating a response refresh header that includes a time value for causing the client to automatically send a subsequent request for the URL if the final response is not complete; and

sending a temporary response to the request and the response refresh header to the client if the final response is not complete.

10. The method of claim 9, wherein the response identifier comprises the session identifier and a hash of the URL.

11. The method of claim 9, wherein the determining step comprises checking a table in the session object for the response identifier to determine if the URL was previously requested by the client.

12. The method of claim 9, further comprising:

generating the final response; and

caching the final response in the cache according to the response identifier, prior to the checking step.