Mapping of a content request for a cache server

• US 7,640,296 B2
• Filed: 12/21/2004
• Issued: 12/29/2009
• Est. Priority Date: 12/21/2004
• Status: Active Grant

• Current Assignee: SAP SE
• Original Assignee: SAP AG (SAP SE)
• Inventors: Merz, Christian, Fuchs, Harald, Theilmann, Wolfgang, Gerteis, Wolfgang, Altenhofen, Michael
• Primary Examiner(s): Nguyen; Quang N.
• Application Number:
  US11/019,607
• Publication Number:
  US 20060167979A1
• Time in Patent Office: 1,834 Days
• Field of Search: 709/203, 709/217, 709/219, 709/227, 709/228, 709/232, 709/238, 709/226
• US Class Current: 709/203
• CPC Class Codes: G06F 16/9574 of access to content, e.g. by caching
• CPC Class Codes: H04L 67/2871 Implementation details of single intermediate entities
• CPC Class Codes: H04L 67/564 Enhancement of application control based on intercepted application data
• CPC Class Codes: H04L 67/5651 Reducing the amount or size of exchanged application data
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching
• CPC Class Codes: H04L 67/5682 Policies or rules for updating, deleting or replacing the stored data

Abstract

An embodiment includes a method that includes receiving, into a cache server, from a client, a request for content from a content server. The request for content includes one or more fields. The method also includes mapping the request for content into a new request for content that is without the one or more fields. The method includes performing a lookup into a cache list of the cache server based on the new request for content.

Claims

1. A method including:

receiving, into a cache server, from a client, a request for content from a content server, wherein the request for content includes one or more fields;

mapping the request for the content into a new request for the content that is without the one or more fields, wherein the mapping of the request includes;

deriving a field from a history of requests, wherein the history of requests include at least one previous request for the same content, and

inserting the field into the request; and

performing a lookup into a cache list of the cache server based on the new request for the content;

wherein deriving a field from a history of requests includes;

removing one or more fields from the request for content if the field contains identification of the client, identification of a session between the client and the content server, or identification of a user of the client;

decoding an encoded string included as one of the one or more fields included in the request; and

creating the field based on at least a portion of the decoded string.

2. The method of claim 1, further including retrieving the content from a machine-readable medium in the cache server if the content is stored in the machine-readable medium in the cache server based on the new request for the content.

3. The method of claim 2, further including forwarding the content to the client if the content is stored in the machine-readable medium in the cache server based on the new request for content.

4. The method of claim 2, further including:

performing the following operations if the content is not stored in the machine-readable medium in the cache server;

forwarding the new request for the content to the content server;

receiving the content from the content server;

storing a copy of the content in the machine-readable medium in the cache server; and

forwarding the content to the client.

5. The method of claim 1, wherein receiving the content request includes receiving a Uniform Resource Identifier (URI) request for content.

6. The method of claim 1, wherein the one or more fields include attributes from a list that includes identification of the client, identification of a session between the client and the content server and identification of a user of the client.

7. The method of claim 1, wherein deriving a field from a history of requests includes:

removing one or more fields from the request for content that contain identification of the client, identification of a session between the client and the content server, or identification of a user of the client;

determining the number of previous requests for the content received during a current session between the client and the content server; and

creating the field based on the number of previous requests for the content.

8. The method of claim 1, wherein deriving a field from a history of requests includes:

removing one or more fields from the request for content that contain identification of the client, identification of a session between the client and the content server, or identification of a user of the client;

determining the address within the content server of the requested content based on the removed field; and

creating the field based on the determined address.

9. A method including:

receiving, into a cache server, from a client, a current request for content from a content server, wherein the current request for the content includes one or more of the attributes from a list that includes identification of the client, identification of a session between the client and the content server and identification of a user of the client;

mapping the current request for the content into a new request for content that is without the one or more attributes, wherein mapping of the current request;

is based on mapping of one or more previous requests, and

comprising inserting a field derived from the one or more previous requests into the current request, wherein the one or more previous requests includes at least one previous request for the same content; and

performing a lookup into a cache list of the cache server based on the new request for content;

wherein inserting a field derived from the one or more previous requests includes;

removing one or more attributes from the current request for content if the attribute contains identification of the client, identification of a session between the client and the content server, or identification of a user of the client;

decoding an encoded string includes as one of the one or more attributes included in the current request; and

creating the field based on at least a portion of the decoded string.

10. The method of claim 9, wherein mapping the current request based on mapping of one or more previous requests includes mapping the current request using identification of the session between the client and the content server derived from the one or more previous requests.

11. The method of claim 9, wherein mapping the current request based on mapping of one or more previous requests includes mapping the current request using identification of the client derived from the one or more previous requests.

12. The method of claim 9, wherein mapping the current request based on mapping of one or more previous requests includes mapping the current request using identification of a version of the content derived from the one or more previous requests.

13. The method of claim 9, further including retrieving the content from a machine-readable medium in the cache server if the content is stored in the machine-readable medium in the cache server based on the new request for content.

14. The method of claim 13, further including forwarding the content to the client if the content is stored in the machine-readable medium in the cache server based on the new request for content.

15. The method of claim 13, further including:

performing the following operations if the content is not stored in the machine-readable medium in the cache server;

forwarding the new request for the content to the content server;

receiving the content from the content server;

storing a copy of the content in the machine-readable medium in the cache server; and

forwarding the content to the client.

16. A system including:

a cache server coupled between a client and a content server, the cache server including;

a mapping engine to;

receive, from the client, a request for content stored in the content server;

remove from the request any field from a list of fields that includes identification of the client, identification of a session between the client and the content server, and identification of a user of the client;

generate a modified request that includes a replacement field derived from a history of requests, wherein the history of requests includes at least one previous request for the same content; and

add an address of a location of the content to the modified request;

a data store to store content requests from the client and retrieved from the content server; and

a lookup engine to determine whether the content is stored in the data store based on the modified request;

wherein deriving a replacement field from a history of requests includes;

removing one or more fields from the request for content if the field contains identification of the client, identification of a session between the client and the content server, or identification of a user of the client;

decoding an encoded string includes as one of the one or more fields included in the request ; and

creating the replacement field based on at least a portion of the decoded string.

17. The system of claim 16, wherein the mapping engine is to generate the modified request based on identification of the session between the client and the content server derived from the one or more previous requests.

18. The system of claim 16, wherein the mapping engine is to generate the modified request based on identification of the client derived from the one or more previous requests.

19. The system of claim 16, wherein the mapping engine is to generate the modified request based on identification of a version of the content derived from the one or more previous requests.

20. An apparatus comprising a computer, the apparatus including:

means for receiving, into a cache server, from a client, a request for content from a content server, wherein the request for content includes one or more fields;

means for mapping the request for content into a new request for content that is without the one or more fields, wherein the means for mapping of the request includes;

means for deriving a field from a history of requests, wherein the history of requests include at least one previous request for the same content; and

means for inserting the field into the request; and

means for performing a lookup into a cache list of the cache server based on the new request for content;

wherein the means for deriving a field from a history of requests includes;

means for removing one or more fields from the request for content if the field contains identification of the client, identification of a session between the client and the content server, or identification of a user of the client;

means for decoding an encoded string included as one of the one or more fields included in the request; and

means for creating the field based on at least a portion of the decoded string.

21. The apparatus of claim 20, further including means for retrieving the content from a machine-readable medium in the cache server if the content is stored in the machine-readable medium in the cache server based on the new request for content.

22. The apparatus of claim 21, further including means for forwarding the content to the client if the content is stored in the machine-readable medium in the cache server based on the new request for content.

23. The apparatus of claim 20, wherein the one or more fields include attributes from a list that includes identification of the client, identification of a session between the client and the content server and identification of a user of the client.

24. An apparatus comprising a computer, the apparatus including:

means for receiving, into a cache server, from a client, a current request for content from a content server, wherein the current request for content includes one or more of the attributes from a list that includes identification of the client, identification of a session between the client and the content server and identification of a user of the client;

means for mapping the current request for the content into a new request for the content that is without the one or more attributes, wherein the means for mapping of the current request;

is based on mapping of one or more previous requests, and

comprising means for inserting a field derived from the one or more previous requests into the current request, wherein the one or more previous requests includes at least one previous request for the same content; and

means for performing a lookup into a cache list of the cache server based on the new request for the content;

wherein means for inserting a field derived from the one or more previous requests includes;

means for removing one or more attributes from the current request for content if the attribute contains identification of the client, identification of a session between the client and the content server, or identification of a user of the client;

means for decoding an encoded string included as one of the one or more attributes included in the current request; and

means for creating the field based on at least a portion of the decoded string.

25. The apparatus of claim 24, wherein means for mapping the current request based on mapping of one or more previous requests includes means for mapping the current request using identification of the session between the client and the content server derived from the one or more previous requests.

26. The apparatus of claim 24, further including means for retrieving the content from a machine-readable medium in the cache server if the content is stored in the machine-readable medium in the cache server based on the new request for content.

27. The apparatus of claim 26, further including means for forwarding the content to the client if the content is stored in the machine-readable medium in the cache server based on the new request for content.

28. A computer-readable storage medium storing computer program instructions which, when executed by one or more processors, cause the one or more processors to perform a method comprising:

receiving, into a cache server, from a client, a request for content from a content server, wherein the request for content includes one or more fields;

mapping the request for the content into a new request for the content that is without the one or more fields, wherein the mapping of the request includes;

deriving a field from a history of requests, wherein the history of requests includes at least one previous request for the same content; and

inserting the field into the request; and

performing a lookup into a cache list of the cache server based on the new request for the content;

wherein deriving a field from a history of requests includes;

removing one or more fields from the request for content if the field contains identification of the client, identification of a session between the client and the content server, or identification of a user of the client;

decoding an encoded string included as one of the one or more fields included in the request; and

creating the field based on at least a portion of the decoded string.

29. A computer-readable storage medium storing computer program instructions which, when executed by one or more processors, cause the one or more processors to perform a method comprising:

receiving, into a cache server, from a client, a current request for content from a content server, wherein the current request for content includes one or more of the attributes from a list that includes identification of the client, identification of a session between the client and the content server and identification of a user of the client;

mapping the current request for the content into a new request for the content that is without the one or more attributes, wherein the mapping of the current request;

is based on mapping of one or more previous requests, and

comprises inserting a field derived from the one or more previous requests into the current request, wherein the one or more previous requests includes at least one previous request for the same content; and

performing a lookup into a cache list of the cache server based on the new request for the content;

wherein inserting a field derived from the one or more previous requests includes;

removing one or more attributes from the current request for content if the attribute contains identification of the client, identification of a session between the client and the content server, or identification of a user of the client;

decoding an encoded string included as one of the one or more attributes included in the current request; and

creating the field based on at least a portion of the decoded string.