HTTP PERFORMANCE ENHANCEMENT BASED ON DELTA TRANSFER

• US 20140052772A1
• Filed: 08/15/2012
• Published: 02/20/2014
• Est. Priority Date: 08/15/2012
• Status: Active Grant

• Current Assignee: Lenovo International Limited (Lenovo Group Ltd.)
• Original Assignee: International Business Machines Corporation
• Inventors: Hourselt, Andrew G., Hu, Pei Ming, Luo, Wen Gang, Yang, Hui, Yin, Yuan
• Granted Patent: US 9,058,400 B2
• Time in Patent Office: Days
• US Class Current: 709/203
• CPC Class Codes: G06F 16/958 Organisation or management of web site content, e.g. publishing, maintaining pages or automatic linking

Abstract

A method, computer program product, and computer system for client-server communication based on delta transfer. A server of the computer system receives from a client a HTTP request for transferring a current image page, compares the current image page and a saved image page which is stored on the server for the client. Based on the comparison, the server of the computer system constructs delta contents between the current image page and the saved image page. The server of the computer system updates the saved image page on the server with the current image page and sends a HTTP response comprising the delta contents to the client.

Claims

1. A method implemented by a computer system for client-server communication based on delta transfer, the method comprising:

receiving, from a client and by a server, a HTTP request for transferring a current image page;

comparing, by the server, the current image page and a saved image page, wherein the saved image page is stored on the server for the client;

constructing, by the server, delta contents between the current image page and the saved image page;

updating, on the server, the saved image page with the current image page; and

sending, from the server to the client, a HTTP response comprising the delta contents.

2. The method of claim 1, further comprising:

extracting, by the client, the delta contents, in response to receiving the HTTP response;

modifying, by the client, a prior DOM tree to generate a new DOM tree, based on the delta contents; and

generating, on the client, the current image page, based on the new DOM tree.

3. The method of claim 1, wherein constructing the delta contents is based on comparison between whole contents of the current image page and whole contents of the saved image page.

4. The method of claim 1, wherein the delta contents include instructions to add, remove, or modify nodes of a DOM tree, and wherein the delta contents include contents of the nodes which are added or modified.

5. The method of claim 1, further comprising:

allocating, by the server, a client ID to the client, in response to determining that the client does not have the client ID; and

creating, on the server, a new saved image page for the client ID.

6. The method of claim 1, further comprising:

creating, on the server, a new saved image page for the client, in response to determining that the saved image page for the client does not exist on the server.

7. A computer program product for client-server communication based on delta transfer, the computer program product comprising:

one or more computer-readable tangible storage devices and program instructions stored on at least one of the one or more tangible storage devices, the program instructions comprising;

program instructions to receive, from a client and by a server, a HTTP request for transferring a current image page;

program instructions to compare, by the server, the current image page and a saved image page, wherein the saved image page is stored on the server for the client;

program instructions to construct, by the server, delta contents between the current image page and the saved image page;

program instructions to update, on the server, the saved image page with the current image page; and

program instructions to send, from the server to the client, a HTTP response comprising the delta contents.

8. The computer program product of claim 7, further comprising:

program instructions to extract, by the client, the delta contents, in response to receiving the HTTP response;

program instructions to modify, by the client, a prior DOM tree to generate a new DOM tree, based on the delta contents; and

program instructions to generate, on the client, the current image page, based on the new DOM tree.

9. The computer program product of claim 7, wherein constructing the delta contents is based on comparison between whole contents of the current image page and whole contents of the saved image page.

10. The computer program product of claim 7, wherein the delta contents include instructions to add, remove, or modify nodes of a DOM tree, and wherein the delta contents include contents of the nodes which are added or modified.

11. The computer program product of claim 7, further comprising:

program instructions to allocate, by the server, a client ID to the client, in response to determining that the client does not have the client ID; and

program instructions to create, on the server, a new saved image page for the client ID.

12. The computer program product of claim 7, further comprising:

program instructions to create, on the server, a new saved image page for the client, in response to determining that the saved image page for the client does not exist on the server.

13. A computer system for client-server communication based on delta transfer, the computer system comprising:

one or more processors, one or more computer-readable tangible storage devices, and program instructions stored on at least one of the one or more storage devices for execution by at least one of the one or more processors, the program instructions comprising;

program instructions to receive, from a client and by a server, a HTTP request for transferring a current image page;

program instructions to compare, by the server, the current image page and a saved image page, wherein the saved image page is stored on the server for the client;

program instructions to construct, by the server, delta contents between the current image page and the saved image page;

program instructions to update, on the server, the saved image page with the current image page; and

program instructions to send, from the server to the client, a HTTP response comprising the delta contents.

14. The computer system of claim 13, further comprising:

program instructions to extract, by the client, the delta contents, in response to receiving the HTTP response;

program instructions to modify, by the client, a prior DOM tree to generate a new DOM tree, based on the delta contents; and

program instructions to generate, on the client, the current image page, based on the new DOM tree.

15. The computer system of claim 13, wherein constructing the delta contents is based on comparison between whole contents of the current image page and whole contents of the saved image page.

16. The computer system of claim 13, wherein the delta contents include instructions to add, remove, or modify nodes of a DOM tree, and wherein the delta contents include contents of the nodes which are added or modified.

17. The computer system of claim 13, further comprising:

program instructions to allocate, by the server, a client ID to the client, in response to determining that the client does not have the client ID; and

program instructions to create, on the server, a new saved image page for the client ID.

18. The computer system of claim 13, further comprising:

program instructions to create, on the server, a new saved image page for the client, in response to determining that the saved image page for the client does not exist on the server.