Methods and apparatus for directing a resource request

• US 7,171,471 B1
• Filed: 08/15/2002
• Issued: 01/30/2007
• Est. Priority Date: 08/15/2002
• Status: Expired due to Fees

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Nair, Raj Krishnan
• Primary Examiner(s): SALAD, ABDULLAHI ELMI
• Application Number:
  US10/219,402
• Time in Patent Office: 1,629 Days
• Field of Search: 709/226, 709/217, 709/229, 707/3, 707/10, 707/9
• US Class Current: 709/226
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/30 Profiles
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services
• CPC Class Codes: H04L 67/563 Data redirection of data network streams
• CPC Class Codes: H04L 67/564 Enhancement of application control based on intercepted application data

Abstract

The invention is directed to techniques for receiving the resource request in which the resource request contains a set of resource preference properties and in which the set of resource preference properties has a resource preference property. The data communications device compares the set of resource preference properties to a database of resource definitions to select a resource, the resource being most closely identified with the set of resource preference properties. The result is to provide a resource response from the selected resource.

Claims

1. A method for processing a resource request, the method comprising the steps of:

receiving the resource request, the resource request containing a set of resource preference properties, the set of resource preference properties having at least one resource preference property;

comparing the set of resource preference properties to a database of resource definitions to select a resource, the resource being most closely identified with the set of resource preference properties among multiple resources which are suitable for responding to the resource request; and

providing a resource response from the selected resource;

wherein a namespace is accessible to the data communications device, wherein the namespace controls usage of the resource preference properties and of the resource definitions, and wherein the step of comparing includes;

checking the namespace prior to comparing resource preference properties to resource definitions; and

processing the resource preference properties contained in the resource request and processing the resource definitions.

2. The method of claim 1 wherein the set of resource preference properties includes a resource preference property formatted as a markup language element, the markup language element having a tag which delimits the markup language element, and wherein the step of comparing includes the step of:

extracting the markup language element from the set of resource preference properties based on the tag.

3. The method of claim 2 wherein the step of extracting includes the steps of:

isolating the markup language element within the set of resource preference properties based on the tag; and

obtaining data of the markup language element for comparison with the database of resource definitions.

4. The method of claim 1 wherein the resource which is most closely identified with the set of resource preference properties is a remote server and wherein the step of providing the resource response includes the step of:

providing, as the resource response, content from the remote server.

5. The method of claim 1 wherein the resource definitions contain an instruction for accessing a resource located on a remote server, wherein the instruction operates the resource and wherein the step of providing the resource response includes the steps of:

locating the instruction for the resource most closely identified with the set of resource preference properties; and

executing the located instruction for the resource most closely identified with the set of resource preference properties in order to provide the resource response from the selected resource.

6. The method of claim 1 wherein the resource preference properties of the set of resource preference properties are associated with the resource definitions of the resources, wherein the database of resource definitions contains the resource definitions of the resources and wherein the step of comparing includes the step of:

matching each of the resource preference properties of the set of resource preference properties to the resource definitions of the resources;

adding to a point value for each resource definition that matches one of the resource preference properties; and

picking, as the selected resource, the resource having the highest point value.

7. The method of claim 1 wherein the resource preference properties of the set of resource preference properties are associated with the resource definitions of the resources, wherein the database of resource definitions contains the resource definitions of the resources and wherein the step of comparing includes the step of:

matching each of the resource preference properties of the set of resource preference properties to the resource definitions of the resources; and

picking, as the selected resource, the resource for which all the resource preference properties of the resource request match the resource definitions of the resource.

8. The method of claim 1 wherein the resource preference properties of the set of resource preference properties are associated with the resource definitions of the resource, wherein the database of resource definitions contains the resource definitions of resources and wherein the step of comparing includes the step of:

matching each of the resource preference properties of the set of resource preference properties to the resource definitions of the resource; and

picking, as the selected resource, the resource for which all the resource preference properties of the resource request match the resource definitions of the selected resource such that all of the resource definitions of the selected resource also all match resource preference properties of the resource request.

9. The method of claim 1 wherein the data communications device controls network communications functions, wherein any object components related to provision of the resource response are available to the data communications device and wherein the step of providing the resource response includes the step of:

generating a network control command identified with the set of resource preference properties in order to control communications of the resource response;

packaging any object components; and

forwarding the network control command and the object components to a remote server to provide a resource response.

10. The method of claim 1, wherein the at least one resource preference property identifies a parameter associated with a resource, the parameter being distinct from a specific identity of a resource.

11. The method of claim 1, wherein the resource which is most closely identified with the at least one resource preference properties is a remote server and wherein the step of providing the resource response includes the step of:

providing, as the resource response, content from the remote server.

12. A data communications device, for processing a resource request, comprising:

a communications interface;

a controller coupled to the communications interface,

wherein the communications interface is configured to receive the resource request, the resource request containing a set of resource preference properties, the set of resource preference properties having at least one resource preference property;

the controller is configured to compare the set of resource preference properties to a database of resource definitions to select a resource, the resource being most closely identified with the set of resource preference properties; and

the communications interface is configured to provide a resource response from the selected resource;

wherein a namespace is accessible to the data communications device, wherein the namespace controls usage of the resource preference properties and of the resource definitions, and wherein, to compare the set of resource preference properties, the controller is configured to;

check the collection of namespace definitions prior to comparing resource preference properties to resource definitions; and

process the resource preference properties contained in the resource request and processing the resource definitions.

13. The data communications device of claim 12 wherein the set of resource preference properties includes a resource preference property formatted as a markup language element, the markup language element having a tag which delimits the markup language element, and wherein to compare the set of resource preference properties, the controller is configured to:

extract the markup language element from the set of resource preference properties based on the tag.

14. The data communications device of claim 13 wherein, to extract the markup language element, the controller is configured to:

isolate the markup language element within the set of resource preference properties based on the tag; and

obtain data of the markup language element for comparison with the database of resource definitions.

15. The data communications device of claim 12 wherein the resource which is most closely identified with the set of resource preference properties is a remote server and wherein, to perform the step of providing the resource response, the communications interface is configured to:

provide, as the resource response, content from the remote server.

16. The data communications device of claim 12 wherein the resource definitions contain an instruction for accessing a resource located on a remote server, wherein the instruction operates the resource and wherein, to provide the resource response, the controller is configured to:

locate the instruction for the resource most closely identified with the set of resource preference properties; and

execute the located instruction for the resource most closely identified with the set of resource preference properties in order to provide the resource response from the selected resource.

17. The data communications device of claim 12 wherein the resource preference properties of the set of resource preference properties are associated with the resource definitions of the resources, wherein the database of resource definitions contains the resource definitions of the resources and wherein, to compare the set of resource preference properties, the controller is configured to:

match each of the resource preference properties of the set of resource preference properties to the resource definitions of the resources;

add to a point value for each resource definition that matches one of the resource preference properties; and

pick, as the selected resource, the resource having the highest point value.

18. The data communications device of claim 12 wherein the resource preference properties of the set of resource preference properties are associated with the resource definitions of the resources, wherein the database of resource definitions contains the resource definitions of the resources and wherein, to compare the set of resource preference properties, the controller is configured to:

match each of the resource preference properties of the set of resource preference properties to the resource definitions of the resources; and

pick, as the selected resource, the resource for which all the resource preference properties of the resource request match the resource definitions of the resource.

20. The data communications device of claim 12 wherein the data communications device controls network communications functions, wherein any object components related to provision of the resource response are available to the data communications device and wherein, to provide the resource response, the communications interface is configured to:

generate a network control command identified with the set of resource preference properties in order to control communications of the resource response;

package any object components; and

forward the network control command and the object components to a remote server to provide a resource response.

21. The data communications device of claim 12, wherein the at least one resource preference property identifies a parameter associated with a resource, the parameter being distinct from a specific identity of a resource.

22. The data communications device of claim 21 wherein the resource which is most closely identified with the at least one resource preference properties is a remote server and wherein, when providing, the communications interface is configured to provide, as the resource response, content from the remote server.

19. The data communications device of 12 wherein the resource preference properties of the set of resource preference properties are associated with the resource definitions of the resource, wherein the database of resource definitions contains the resource definitions of resources and wherein, to compare the set of resource preference properties, the controller is configured to:

match each of the resource preference properties of the set of resource preference properties to the resource definitions of the resource; and

pick, as the selected resource, the resource for which all the resource preference properties of the resource request match the resource definitions of the selected resource such that all of the resource definitions of the selected resource also all match resource preference properties of the resource request.

23. A computer program product that includes a computer readable medium having instructions stored thereon for processing a resource request such that when the instructions are carried out by a computer, the computer is capable of performing the steps of:

receiving the resource request, the resource request containing a set of resource preference properties, the set of resource preference properties having at least one resource preference property;

comparing the set of resource preference properties to a database of resource definitions to select a resource, the resource being most closely identified with the set of resource preference properties; and

providing a resource response from the selected resource;

wherein a namespace is accessible to the computer, wherein the namespace controls usage of the resource preference properties and of the resource definitions, and wherein the step of comparing includes;

checking the namespace Prior to comparing resource preference properties to resource definitions; and

processing the resource preference properties contained in the resource request and processing the resource definitions.

24. A data communications device, for processing a resource request, comprising:

a communications interface;

a controller;

an interconnection mechanism coupling the communications interface to the controller;

means, coupled to the communications interface, for receiving the resource request, the resource request containing a set of resource preference properties, the set of resource preference properties having at least one resource preference property;

means, coupled to the controller, for comparing the set of resource preference properties to a database of resource definitions to select a resource, the resource being most closely identified with the set of resource preference properties; and

means, coupled to the communications interface, for providing a resource response from the selected resource;

wherein a namespace is accessible to the data communications device, wherein the namespace controls usage of the resource preference properties and of the resource definitions, and wherein the means for comparing includes;

means for checking the namespace prior to comparing resource preference properties to resource definitions; and

means for processing the resource preference properties contained in the resource request and processing the resource definitions.