Method and device for performing caching of dynamically generated objects in a data communication network

• US 8,788,581 B2
• Filed: 01/18/2013
• Issued: 07/22/2014
• Est. Priority Date: 01/24/2005
• Status: Active Grant

• Current Assignee: Citrix Systems, Inc. (Cloud Software Group)
• Original Assignee: Citrix Systems, Inc. (Cloud Software Group)
• Inventors: Sundarrajan, Prabakar, Khemani, Prakash, Kailash, Kailash, Soni, Ajay, Sinha, Rajiv, Annamalaisami, Saravana, Kumar, Anil, Bhushan K. R., Bharath
• Primary Examiner(s): SONG, HUA JASMINE
• Application Number:
  US13/744,614
• Publication Number:
  US 20130132472A1
• Time in Patent Office: 550 Days
• Field of Search: 711/118, 711/139, 711/E12.001, 711/E12.023, 709/203, 709/217, 709/219
• US Class Current: 709/203
• CPC Class Codes: G06F 16/9574 of access to content, e.g. by caching
• CPC Class Codes: H04L 67/01 Protocols
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]

Abstract

A method for maintaining a cache of dynamically generated objects. The method includes storing in the cache dynamically generated objects previously served from an originating server to a client. A communication between the client and server is intercepted by the cache. The cache parses the communication to identify an object determinant and to determine whether the object determinant indicates whether a change has occurred or will occur in an object at the originating server. The cache marks the object stored in the cache as invalid if the object determinant so indicates. If the object has been marked as invalid, the cache retrieves the object from the originating server.

Claims

1. A system for caching a dynamically generated object, the system comprising:

a device configured to be deployed intermediary to a plurality of clients and a server,

a cache of the device;

wherein the device is configured to store in the cache a dynamically generated object, identified as not cacheable, generated at the server that has been transmitted via the device to a first client of the plurality of clients in response to a first request of the first client;

wherein the device is configured to transmit to a second client of the plurality of clients the dynamically generated object stored in the cache for a response to a second request of the second client received by the device.

2. The system of claim 1, wherein the device is configured to intercept the server'"'"'s response comprising the dynamically generated object, store the dynamically generated object to the cache and transmit the server'"'"'s response to the first client.

3. The system of claim 1, wherein the device is configured to intercept the second request of the second client to the server for the dynamically generated object, identify that the dynamically generated object is stored in the cache and respond to the second request with the dynamically generated object stored in the cache instead of forwarding the second request to the server.

4. The system of claim 1, wherein the dynamically generated object identified as not cacheable comprises a dynamically generated object not identified as cacheable.

5. A method for maintaining a cache of dynamically generated objects by a device intermediary to a plurality of clients and a server, the method comprising:

establishing automatically by, a device intermediary to a plurality of clients and a server, an object determinant for a plurality of dynamically generated objects stored in a cache of the device, the object determinant comprising one or more parameters embedded within requests;

maintaining, by the device, in the cache, linked to the predetermined object determinant, the plurality of dynamically generated objects generated at the server that have been transmitted via the device to one or more clients;

determining, by the device, that the one or more parameters within a request for a dynamically generated object from a client of the plurality of clients to the server matches the object determinant; and

marking, by the device responsive to the determination, the plurality of dynamically generated objects stored in the cache as invalid.

6. The method of claim 5, further comprising establishing automatically, by the device from processing requests, a particular user id as the one or more parameters for the object determinant.

7. The method of claim 5, further comprising establishing automatically, by the device from processing requests, a particular group id as the one or more parameters for the object determinant.

8. The method of claim 5, further comprising establishing automatically, by the device from processing requests, a pair of name-value parts of a uniform resource locator as the one or more parameters for the object determinant.

9. The method of claim 5, further comprising establishing automatically, by the device from processing requests, a stem of a uniform resource locator as the one or more parameters for the object determinant.

10. The method of claim 5, further comprising parsing, by the device, the request from the client to identify the one or more parameters embedded within the request.

11. The method of claim 5, wherein at least one of the plurality of dynamically generated objects are identified as not cacheable.

12. The method of claim 11, wherein the least one of the plurality of dynamically generated objects identified as not cacheable comprises a dynamically generated object not identified as cacheable.

13. A system for maintaining a cache of dynamically generated objects by a device intermediary to a plurality of clients and a server, the system comprising:

a device deployable intermediary to a plurality of clients and a server, the device configured to automatically establish an object determinant for a plurality of dynamically generated objects stored in a cache of the device, the object determinant comprising one or more parameters embedded within requests;

a cache to maintain, linked to the predetermined object determinant, the plurality of dynamically generated objects generated at the server that have been transmitted via the device to one or more clients;

wherein the device is configured to identify that the one or more parameters within a request for a dynamically generated object from a client of the plurality of clients to the server matches the object determinant and mark. responsive to the determination, the plurality of dynamically generated objects stored in the cache as invalid.

14. The system of claim 13, wherein the device is configured to automatically establish from processing requests, a particular user id as the one or more parameters for the object determinant.

15. The system of claim 13, wherein the device is configured to automatically establish from processing requests, a particular group id as the one or more parameters for the object determinant.

16. The system of claim 13, wherein the device is configured to automatically establish from processing requests, a pair of name-value parts of a uniform resource locator as the one or more parameters for the object determinant.

17. The system of claim 13, wherein the device is configured to automatically establish from processing requests, a stem of a uniform resource locator as the one or more parameters for the object determinant.

18. The system of claim 13, wherein the device is configured to parse the request from the client to identify the one or more parameters embedded within the request.

19. The system of claim 13, wherein at least one of the plurality of dynamically generated objects are identified as not cacheable.

20. The system of claim 19, wherein the least one of the plurality of dynamically generated objects identified as not cacheable comprises a dynamically generated object not identified as cacheable.