System and/or method for client-driven server load distribution

• US 9,300,733 B2
• Filed: 11/28/2011
• Issued: 03/29/2016
• Est. Priority Date: 06/01/2007
• Status: Active Grant

• Current Assignee: Adobe Inc.
• Original Assignee: Adobe Systems Incorporated (Adobe Inc.)
• Inventors: Thornburgh, Michael, Kaufman, Matthew
• Primary Examiner(s): HOANG, HIEU T
• Application Number:
  US13/305,693
• Publication Number:
  US 20120278493A1
• Time in Patent Office: 1,583 Days
• Field of Search: 709/227, 709/228, 709/229, 709/201, 709/202, 709/240, 709/241
• US Class Current: 1/1
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/1008 based on parameters of servers, e.g. available memory or workload monitoring of computer activity G06F11/30
• CPC Class Codes: H04L 67/101 based on network conditions

Abstract

The subject matter disclosed herein relates to communication between a client and a server in a communications network. In one particular example, a server is selected from a plurality of servers to provide a resource and/or a service to a client.

Claims

1. A method comprising:

receiving, at a server hosted on a computing platform, an initiation message sent by a client to multiple servers over a network, the multiple servers including the server hosted on the computing platform, wherein the initiation message requests a resource or a service and includes a tag identifying the initiation message;

generating, at the server, a response message based on the initiation message, the response message including the tag and a generated cookie;

sending the response message to the client;

discarding, at the server, the generated cookie to keep the server stateless with respect to the initiation message after the response message is sent;

receiving a session initiation message from the client, the session initiation message including the generated cookie;

validating the session initiation message based on a comparison of the generated cookie received in the session initiation message and a regenerated version of the generated cookie, where the regenerated version of the generated cookie is created based upon secret information used by the server to create the generated cookie included in the session initiation message and a source address of the session initiation message; and

responding to a valid session initiation message with a session initiation response message to the client to open a session, wherein the session initiation response message comprises keying information that includes a responder session key component that is used to form an encryption key used to encrypt packets transmitted during the session.

2. The method of claim 1, further comprising:

receiving, at the server, an additional message before the initiation message, the additional message being another initiation message sent to the multiple servers over the network; and

based on a statistical assessment with respect to server load, discarding the additional message without response or delaying a response to the additional message.

3. The method of claim 1, where generating the response message comprises generating the response message including a cryptographic certificate associated with the server.

4. The method of claim 1, where the response message sent from the server indicates a responsiveness of the server.

5. The method of claim 4, where the responsiveness of the server results from, at least in part, delays or throughput associated with the network in transmitting information between the client and the server.

6. The method of claim 1, where the response message sent from the server is the earliest response message received by the client in response to the initiation message sent by the client to the multiple servers.

7. The method of claim 1, where the server is at least one server selected from the group consisting of a print server adapted to process print jobs, a web server, an email server, and a content server adapted to distribute audio or video content.

8. The method of claim 1, where the regenerated version of the generated cookie is created based upon a current time.

9. The method of claim 1, comprising:

generating a second cookie based upon secret information used by the server to create the generated cookie included in the session initiation message, a source address of the session initiation message, and a previous current time;

comparing the second cookie with information in the received session initiation message; and

based upon a result of the comparing, determining that the session initiation message is invalid.

10. A system comprising:

a communication adapter configured to transmit information to and receive information from a network; and

a processing system coupled with the communication adapter, the processing system configured to host a server to perform operations comprising;

receiving an initiation message sent by a client to multiple servers over the network, the multiple servers including the server, wherein the initiation message requests a resource or service and includes a tag identifying the initiation message;

generating, at the server, a response message based on the initiation message, the response message including the tag and a generated cookie;

sending the response message to the client;

discarding, at the server, the generated cookie to keep the server stateless with respect to the initiation message after the response message is sent;

receiving a session initiation message from the client, the session initiation message including the generated cookie;

validating the session initiation message based on a comparison of the generated cookie received in the session initiation message and a regenerated version of the generated cookie, where the regenerated version of the generated cookie is created based upon secret information used by the server to create the generated cookie included in the session initiation message and a source address of the session initiation message; and

responding to a valid session initiation message with a session initiation response message to the client to open a session, wherein the session initiation response message comprises keying information that includes a responder session key component that is used to form an encryption key used to encrypt packets transmitted during the session.

11. The system of claim 10, were the processing system is configured to:

receive an additional message before the initiation message, the additional message being another initiation message sent to the multiple servers over the network; and

based on a statistical assessment with respect to server load, discard the additional message without response or delaying a response to the additional message.

12. The system of claim 10, where generating the response message comprises generating the response message including a cryptographic certificate associated with the server.

13. The system of claim 10, where the response message sent from the server indicates a responsiveness of the server.

14. The system of claim 13, where the responsiveness of the server results from, at least in part, delays or throughput associated with the network in transmitting information between the client and the server.

15. The system of claim 10, where the response message sent from the server is the earliest response message received by the client in response to the initiation message sent by the client to the multiple servers.

16. The system of claim 10, where the server is at least one server selected from the group consisting of a print server adapted to process print jobs, a web server, an email server, or a content server adapted to distribute audio or video content.

17. The system of claim 10, where the regenerated version of the generated cookie is created based upon a current time.

18. The system of claim 10, comprising:

generating a second cookie based upon secret information used by the server to create the generated cookie included in the session initiation message, a source address of the session initiation message, and a previous current time;

comparing the second cookie with information in the received session initiation message; and

based upon a result of the comparing, determining that the session initiation message is invalid.

19. A non-transitory storage medium encoding machine-readable instructions configured to cause a server hosted on a computing platform to perform operations comprising:

receiving, at the server hosted on the computing platform, an initiation message sent by a client to multiple servers over a network, the multiple servers including the server hosted on the computing platform, wherein the initiation message requests a resource or a service and includes a tag identifying the initiation message;

generating, at the server, a response message based on the initiation message, the response message including the tag and a generated cookie;

sending the response message to the client;

discarding, at the server, the generated cookie to keep the server stateless with respect to the initiation message after the response message is sent;

receiving a session initiation message from the client, the session initiation message including the generated cookie;

validating the session initiation message based on a comparison of the generated cookie received in the session initiation message and a regenerated version of the generated cookie, where the regenerated version of the generated cookie is created based upon secret information used by the server to create the generated cookie included in the session initiation message and a source address of the session initiation message; and

responding to a valid session initiation message with a session initiation response message to the client to open a session, wherein the session initiation response message comprises keying information that includes a responder session key component that is used to form an encryption key used to encrypt packets transmitted during the session.

20. The storage medium of claim 19, were the machine-readable instructions are configured to cause the server to perform operations comprising:

receiving an additional message before the initiation message, the additional message being another initiation message sent to the multiple servers over the network; and

based on a statistical assessment with respect to server load, discarding the additional message without response or delaying a response to the additional message.