Creating distributed proxy configurations

• US 7,200,679 B2
• Filed: 02/05/2002
• Issued: 04/03/2007
• Est. Priority Date: 04/13/2001
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Seneviratne, Aruna, Gunningberg, Per, Ardon, Sebastien, Portmann, Marius, Ismailov, Yuri, Landfeldt, Bjorn
• Primary Examiner(s): Jaroenchonwanit; Bunjob
• Assistant Examiner(s): LESNIEWSKI, VICTOR D
• Application Number:
  US10/068,779
• Publication Number:
  US 20020165928A1
• Time in Patent Office: 1,883 Days
• Field of Search: 709217-219, 709/231, 709/246, 709/247
• US Class Current: 709/246
• CPC Class Codes: H04L 67/04 specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
• CPC Class Codes: H04L 67/10 in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46
• CPC Class Codes: H04L 67/288 Distributed intermediate devices, i.e. intermediate devices for interaction with other intermediate devices on the same level
• CPC Class Codes: H04L 67/303 Terminal profiles
• CPC Class Codes: H04L 67/306 User profiles
• CPC Class Codes: H04L 67/34 involving the movement of software or configuration parameters network booting or remote initial program loading [RIPL] G06F9/4416
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

Server-to-user delivery of a data stream associated with a service provided by the server is effectuated by selecting the server and, automatically and without manual intervention, providing in a communication path that is to be used for the delivery a proxy that performs a proxy operation on the data stream during the delivery. A proxy can be automatically installed in a communication path through a data network. In response to an installation request, a communication port for coupling to the communication path is automatically allocated and a proxy to support data flow through the communication port is automatically loaded. The proxy is operable for performing a proxy operation on the data stream. In maintaining proxies in a communication path used to deliver from a server to a user a data stream associated with a service provided by the server, it can be determined when a first proxy in the communication path is not performing its proxy function within the communication path. In response to such a determination, a replacement proxy can be provided in the communication path automatically and without manual intervention. The replacement proxy replaces the first proxy in the communication path to perform the proxy function of the first proxy.

Claims

1. A method of supporting delivery, from a server to an application, of a data stream associated with a service provided by the server, the method comprising:

selecting the server;

requesting the service provided by the server; and

automatically and without manual intervention providing a proxy path between the server and the application for communicating the data stream to the application by sending a request from the server side of the proxy oath to a proxy execution environment (PEE) server, wherein the proxy path comprises a plurality of general purpose proxies retrieved from the PEE server, the plurality of proxies being concatenated together to form a proxy chain with an input of each proxy being connected to an output of each preceding proxy,

coupling a proxy cradle to the proxy chain, the proxy cradle comprising logic for managing proxy-to-proxy communications in the proxy path and for managing network service points of the proxy chain,

performing a proxy operation on the data stream during the delivery of the data stream to the application, wherein the proxy operation processes the data stream according to characteristics required for communicating with the application, and

automatically and dynamically modifying proxy functionality or the proxy path, as required, during a session.

2. The method of claim 1, wherein said proxy path comprises one proxy.

3. The method of claim 1, wherein said step of providing the proxy path includes configuring the proxy chain to provide the requested service.

4. The method of claim 3, further comprising the step of

configuring the proxy path based on information indicative of at least one of a preference of the application, a characteristic of equipment that will receive the data stream, and a characteristic of the service.

5. The method of claim 1, further comprising the steps of

responsive to the step of sending the request from the server side to the PEE server a request to install the proxy chain in the proxy path, the PEE server installing the proxy chain thereon in response to said installation request, and

coupling the proxy execution environment server into the proxy path.

6. The method of claim 5, further comprising the steps of

the proxy execution environment server

downloading selected proxy modules from proxy repositories and

providing an input network service point, an output network service point

and coupling with the proxy cradle, all for handling the proxy-to-proxy communication within the proxy chain.

7. The method of claim 6, further comprising the proxy execution environment server

allocating the necessary network service points for the associated proxy chain enabling the proxy chain to listen for connections and wherein the service points are TCP sockets or UDP sockets.

8. The method of claim 1, wherein each of the concatenated proxies are designed as general-purpose proxy service modules and do not require direct communication to the server or the application.

9. The method of claim 1, wherein said providing step includes sending from the server side of the proxy path to each of a plurality of proxy execution environment servers a request to install a proxy or concatenated proxy chain from each of the plurality of proxy execution environment servers in the proxy path.

10. The method of claim 9, wherein said step of sending the request to each of the plurality of proxy execution environment servers includes sending the requests in parallel.

11. The method of claim 9, including the proxy execution environment servers

installing the respective proxies or proxy chains thereon in response to the respective installation request, and

the proxy execution environment servers sending to the server side of the proxy path information that identifies input and output ports to be used for coupling the respective proxy execution environment servers into the proxy path.

12. The method of claim 11, wherein said installing step includes the proxy execution environment servers installing the respective proxies in parallel.

13. The method of claim 12, wherein said step of sending input and output port information includes the proxy execution environment servers sending their respective input and output port information to the server side in parallel.

14. The method of claim 11, wherein said providing step includes forwarding from the server side of the proxy path to the proxy execution environment server the input port information that was sent to the server side by another proxy execution environment server.

15. The method of claim 14, wherein said forwarding step includes, for each of the proxy execution environment servers, forwarding from the server side to the proxy execution environment server the input port information that was sent by the another proxy execution environment server.

16. The method of claim 1, wherein said proxy operation includes one of data compression, data encryption, data transformation, data transcoding and data caching.

17. A system for supporting delivery, from a server to an application, of a data stream associated with a service provided by the server, comprising:

an input for receiving a service request; and

a proxy provider apparatus coupled to said input and responsive to the service request for automatically and without manual intervention providing a proxy path between the server and the application for communicating the data stream to the application by sending a request from the server side of the proxy path to

a proxy execution environment (PEE) server, wherein the proxy path comprises a plurality of general purpose proxies retrieved from the PEE server, the plurality of proxies being concatenated together to form a proxy chain, wherein

a proxy cradle, comprising logic for managing proxy-to-proxy communications in the proxy path and for managing network service points of the proxy chain, is coupled with the proxy chain, with an input of each general-purpose proxy being connected to an output of each preceding proxy, the proxy chain performing a proxy operation on the data stream during the delivery of the data stream to the application, wherein the proxy operation processes the data stream according to characteristics required for communicating with the application, and

means for automatically and dynamically modifying proxy functionality or the proxy path, as required, during a session.

18. The system of claim 17, wherein said proxy path comprises one proxy.

19. The system of claim 17, wherein said proxy provider apparatus includes a proxy execution environment server for receiving a request to install a specific proxy in the proxy path and the proxy execution environment server being operable for installing the requested specific proxy.

20. The system of claim 17, wherein said proxy provider apparatus includes a proxy repository for storing proxies therein, said proxy execution environment server coupled to said proxy repository and operable to download the stored proxies therefrom.

21. The system of claim 17, wherein said proxy execution environment server is operable for

providing an input network service point, an output network service point and coupling with the proxy cradle;

all for handling proxy-to-proxy communication within the proxy chain.

22. The system of claim 21, wherein said proxy execution environment server is operable for allocating necessary network service points for the associated proxy chain thereby enabling the proxy chain to listen for connections, wherein the service utilizes TCP sockets or UDP sockets.

23. The system of claim 17, wherein said proxy provider apparatus includes a plurality of proxy execution environment servers for receiving requests to install proxies in the proxy path, each of the plurality of proxy execution environment servers operable for installing respective proxies therefrom in the proxy path, each said proxy execution environment server further operable for sending to the proxy provider apparatus information which identifies input and output ports to be used for coupling the respective proxy execution environment server into the proxy path.

24. The system of claim 17, wherein each of the concatenated proxies do not require direct communication to the server or the application.

25. The system of claim 17, wherein the proxy provider apparatus further comprises means for sending requests for proxies, in parallel, to respective proxy execution environment servers.

26. The system of claim 17, wherein the proxy execution environment server comprises means for installing the respective proxies in the proxy path in response to the respective installation requests and

the proxy execution environment server sending to the server side of the proxy path information that identifies input and output ports to be used for coupling the respective proxy execution environment servers into the proxy path.

27. The system of claim 26, wherein the proxy execution server includes means for installing the respective proxies in parallel in the proxy path.

28. The system of claim 17, wherein the means for performing a proxy operation includes means for performing data compression, data encryption, data transformation, data transcoding and data caching.