Updating a copy of a remote document stored in a local computer system

• US 6,061,686 A
• Filed: 09/26/1997
• Issued: 05/09/2000
• Est. Priority Date: 06/26/1997
• Status: Expired due to Term

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: Digital Equipment Corporation (HP Inc.)
• Inventors: Taranto, Edward James, Gauvin, William Joseph
• Primary Examiner(s): Lintz, Paul R.
• Assistant Examiner(s): Colbert, Ella
• Application Number:
  US08/882,883
• Time in Patent Office: 956 Days
• Field of Search: 707/10, 707/9, 707/201, 707/3, 707/8, 707/513, 707/1, 395/200.33, 395/200.35, 395/200.59, 705/14
• US Class Current: 707/624
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/1095 Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
• CPC Class Codes: H04L 67/5682 Policies or rules for updating, deleting or replacing the stored data
• CPC Class Codes: H04L 67/62 Establishing a time schedule for servicing the requests
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: Y10S 707/959 Network

Abstract

In response to a command by a local computer system, a copy of a remote document is downloaded onto a remote update network device from an origin network device. A predetermined time after the remote document copy is downloaded, the update network device interfaces with the origin network device to compare the remote document with the remote document copy. If the remote document has been modified since it was copied onto the update network device, the remote document copy is updated to reflect the modifications. When the local computer system reconnects to the network, the updated remote document copy may be downloaded into the memory of the local computer system if the remote document copy on the update network device is different than a local copy of the remote document stored in the local computer system.

Claims

1. A method of updating a local copy of an origin document, the local copy being stored in memory of a local computer system that is connectable to a network, the origin document being stored in memory of an origin network device that is

connectable to the local computer system via the network, the local computer system also being connectable, via the network, to an update network device having a memory, the method comprising the steps of:

A. downloading, by the update network device, an update copy of the origin document into the memory of the update network device;

B. comparing, by the update network device, the origin document to the update copy;

C. modifying, by the update network device, the update copy when a change in the origin document is detected in step B;

D. comparing the update copy to the local copy by the update network device; and

E. modifying, responsive to the step D of comparing, the local copy when the local computer system is reconnected to the network.

2. The method of updating a local copy of an origin document as defined by claim 1 wherein the step of modifying includes the steps of:

D1. deleting the update copy;

D2. downloading a new copy of the origin document into the memory of the update network device; and

D3. designating the new copy of the origin document as the update copy.

3. The method of updating a local copy of an origin document as defined by claim 1 wherein the step E of modifying includes the steps of:

E1 deleting the local copy;

E2 downloading a new copy of the update copy into the memory of the local computer system; and

E3 designating the new copy of the update copy as the local copy.

4. The method of updating a local copy of an origin document as defined by claim 1 wherein the steps D and E are background processes.

5. The method of updating a local copy of an origin document as defined by claim 1 wherein the origin document has an origin document last update time stamp and the update copy has an update copy last update time stamp, wherein step of comparing includes the step of:

C1. comparing the update copy last update time stamp to the origin document last update time stamp.

6. The method of updating a local copy of an origin document as defined by claim 1 wherein the origin document is a World Wide Web resource.

7. The method of updating a local copy of an origin document as defined by claim 1 further including the step of:

G. selecting an autoupdate button on a graphical user interface displayed on the local computer system.

8. The method of updating a local copy of an origin document as defined by claim 1 wherein the step B includes the step of:

B1. controlling the update network device to periodically access the origin network device.

9. The method of updating a local copy of an origin document as defined by claim 1 wherein step A includes the step of:

A1. receiving a request to maintain the local copy.

10. The method of updating a local copy of an origin document as defined by claim 1 wherein the local copy has a name and a last update time, the method further including the step of:

H. uploading a name and a last update time stamp of the local copy to the update network device.

11. The method of updating a local copy of an origin document as defined by claim 1 wherein the update copy includes a name and a last update time stamp and wherein the step B further includes the step of:

B1. updating a data structure having the name of the update copy and the last update time stamp of the update copy.

12. An apparatus for updating a local copy of an origin document, the local copy being stored in memory of a local computer system that is connectable to a network, the origin document being stored in memory of an origin network device that is connectable to the local computer system via the network, the local computer system also being connectable, via the network, to an update network device having a memory, the apparatus comprising:

a downloader for downloading an update copy of the origin document into the memory of the update network device;

a first comparator on the update network device for comparing the update copy and the origin document; and

means for modifying the update copy, said modifying means modifying the update copy when the origin document is detected by the first comparator to be different than the update copy.

13. The apparatus for updating a local copy of an origin document as defined by claim 12 further including:

a second comparator for comparing the update copy to the local copy; and

a second modifier for modifying, responsive to the second comparator, the local copy when the local computer system is reconnected to the network.

14. The apparatus for updating a local copy of an origin document as defined by claim 13 wherein the second modifier includes:

means for deleting the local copy;

means for downloading a new copy of the update copy into the memory of the local computer system; and

means for designating the new copy of the update copy as the local copy.

15. The apparatus for updating a local copy of an origin document as defined by claim 12 wherein the first modifier includes:

means for deleting the update copy;

means for downloading a new copy of the origin document into the memory of the update network device; and

means for designating the new copy of the origin document as the update copy.

16. The apparatus for updating a local copy of an origin document as defined by claim 12 wherein the origin document has an origin document last update time stamp and the update copy has an update copy last update time stamp, wherein first comparator includes:

means for comparing the update copy last update time stamp to the origin document last update time stamp.

17. The apparatus for updating a local copy of an origin document as defined by claim 12 wherein the origin document is a World Wide Web resource.

18. The apparatus for updating a local copy of an origin document as defined by claim 12 further including means for causing the update network device to periodically access the origin network device.

19. A computer program product for use with a local computer system having a memory and being connectable by a network to an origin network device having a memory and to an update network device having a memory, the computer program product updating a local document copy, stored in the local computer system memory, of an origin document stored in the origin network device memory, the computer program product comprising a computer usable medium having computer readable program code thereon, the computer readable program code including:

program code for downloading, by the update network device, an update copy of the origin document into the memory of the update network device;

first program code for comparing, by the update network device, the origin document to the update copy;

first program code for modifying, by the update network device, the update copy when the update copy differs from the origin document;

second program code for comparing the update copy to the local copy; and

second program code for modifying the local copy when the local computer system is reconnected to the network.

20. The method of updating a local copy of an origin document as defined by claim 19 wherein the first program code for comparing is on the update network device.

21. The method of updating a local copy of an origin document as defined by claim 19 wherein the first program code for modifying is on the update network device.

22. The computer program product as defined by claim 19 further including:

program code for causing the update network device to interface with the origin network device.

23. The computer program product as defined by claim 19 wherein the program code for modifying includes:

program code for deleting the update copy;

program code for downloading a new copy of the origin document into the update network device memory; and

program code for designating the new copy of the origin document as the update copy.

24. The computer program product as defined by claim 19 further including

a second program code for modifying the local copy when the origin document is different than the update copy.

25. The computer program product as defined by claim 19 wherein the origin document has an origin document last update time and the update copy has an update copy last update time, the computer program product further including:

program code for comparing the update copy last update time to the origin document last update time.

26. The computer program product as defined by claim 19 wherein the origin document is a World Wide Web resource.

27. An apparatus for updating a local copy of an origin document, the local copy being stored in memory of a local computer system that is connectable to a network, the origin document being stored in memory of an origin network device that is connectable to the local computer system via the network, the local computer system also being connectable, via the network, to an update network device having a memory, the apparatus comprising:

a downloader for downloading an update copy of the origin document into the memory of the update network device;

a first comparator on the update network device for comparing the update copy and the origin document;

a second comparator for comparing the update copy to the local copy;

a first modifier for modifying the update copy if the origin document is different than the update copy; and

a second modifier for modifying, responsive to the second comparator, the local copy when the local computer system is reconnected to the network.

28. The apparatus for updating a local copy of an origin document as defined by claim 27 wherein the second modifier includes:

means for deleting the local copy;

means for downloading a new copy of the update copy into the memory of the local computer system; and

means for designating the new copy of the update copy as the local copy.

29. An apparatus for updating a local copy of an origin document, the local copy being stored in memory of a local computer system that is connectable to a network, the origin document being stored in memory of an origin network device that is connectable to the local computer system via the network, the local computer system also being connectable, via the network, to an update network device having a memory, the apparatus comprising:

a downloader for downloading an update copy of the origin document into the memory of the update network device;

a first comparator on the update network device for comparing the update copy and the origin document;

a second comparator for comparing the update copy to the local copy;

a first modifier for modifying the update copy if the origin document is different than the update copy, said first modifier including;

means for deleting the update copy;

means for downloading a new copy of the origin document into the memory of the update network device; and

means for designating the new copy of the origin document as the update copy.

30. An apparatus for updating a local copy of an origin document, the local copy being stored in memory of a local computer system that is connectable to a network, the origin document being stored in memory of an origin network device that is connectable to the local computer system via the network, the local computer system also being connectable, via the network, to an update network device having a memory, the apparatus comprising:

a downloader for downloading an update copy of the origin document into the memory of the update network device;

a first comparator on the update network device for comparing the update copy and the origin document;

a second comparator for comparing the update copy to the local copy;

a first modifier for modifying the update copy if the origin document is different than the update copy; and

means for causing the update network device to periodically access the origin network device.