Proxy host computer and method for accessing and retrieving information between a browser and a proxy

• US 6,049,821 A
• Filed: 01/24/1997
• Issued: 04/11/2000
• Est. Priority Date: 01/24/1997
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Lockhart, Thomas Wayne, Battin, Robert D., Theriault, Roger
• Primary Examiner(s): Maung, Zarni
• Assistant Examiner(s): CALDWELL, ANDREW T
• Application Number:
  US08/788,971
• Time in Patent Office: 1,173 Days
• Field of Search: 395/200.31-200.33, 395/200.47-200.49, 395/200.76, 395/187.01, 713/201, 709/201-203, 709/217-219, 709/246
• US Class Current: 709/203
• CPC Class Codes: G06F 16/9577 Optimising the visualization of content, e.g. distillation of HTML documents
• CPC Class Codes: H04L 63/0236 Filtering by address, protocol, port number or service, e.g. IP-address or URL
• CPC Class Codes: H04L 63/0281 Proxies

Abstract

A query (160) is sent from a browser (100, 101) to a proxy (300) directed to an information source (140) in a networked data communications system. In one aspect, the query is modified by the proxy to provide a modified query and the modified query is forwarded to the information source (120). A response (170) is received at the proxy from the information source and forwarded to the browser. In another aspect the response is modified by the proxy to provide a modified response (370) which is forwarded to the browser. The proxy (300) has a proxy configuration database (340) including a file (341) of services identifying a method of filtering for a specified browser (100) and filters (302, 304) for filtering responsive to the file of services, respectively, queries from and responses to the specified browser. The method of filtering may vary or be modified, for example, according to attributes of the URL within the query, proxy attachment point (310) for the browser, response content, or changing browser requirements, as user, device, or network service needs change.

Claims

1. A proxy host computer comprising:

a configuration database of services associated with browsers, further comprising a plurality of configuration pages representing different sets of services; and

a database updater to update services associated with a browser upon receipt from the browser of a request for a configuration update, said request selecting one configuration page from said plurality of configuration pages.

2. The proxy host computer of claim 1, wherein the configuration database includes associations between services and attachment points of browsers.

3. The proxy host computer of claim 1 further comprising a wireless radio link connecting the proxy host computer to the browser.

4. A method of accessing and retrieving information in a networked data communications system comprising, at a proxy:

receiving from a browser a query directed to an information source;

establishing a set of services associated with the browser;

selecting a method of filtering to apply to the query as a function of the set of services associated with the browser;

modifying the query according to the method of filtering to provide a modified query;

forwarding the modified query to another information source;

receiving from the another information source a response to the modified query; and

forwarding the response to the browser.

5. The method of claim 4 further comprising:

at the browser configuring the browser to direct the query to a specific attachment point of a plurality of attachment points of the proxy; and

wherein said step of receiving further includes receiving the query at the specific attachment point and said step of establishing a set of services depends on the specific attachment point.

6. The method of claim 4 wherein, the step of modifying the query comprises filtering the query information by the proxy.

7. The method of claim 4, wherein the set of services established for a selected browser are determined by at least one of:

associating a class of service with a proxy host computer attachment point;

implying proxy parameters from a browser query; and

configuring proxy parameters for the selected browser in response to a fetched form.

8. The method of claim 7, wherein the step of configuring the proxy parameters includes:

identifying a particular type of configuration request from contents of the query;

modifying a proxy configuration parameter database according to information contained in the query; and

sending a status response back to the selected browser on success or failure of the configuration request.

9. The method of claim 4, wherein the step of modifying the query as a function of the set of services established for a selected browser includes the steps of:

providing an advance indication of characteristics of information requested; and

altering the query by the proxy.

10. The method of claim 9, wherein the step of providing an advance indication of the characteristics of information requested includes at least one of:

annotating a physical size of a data file on the proxy;

annotating file type characteristics; and

annotating a file content classification on the proxy.

11. The method of claim 4, wherein the set of services established for a selected browser are determined by associating a set of filtering methods based on capabilities of the selected browser.

12. A method of accessing and retrieving information in a networked data communications system comprising, at a proxy:

receiving, at a specific attachment point, from a browser a query directed to an information source, the query directed to the specific attachment point of a plurality of attachment points of the proxy;

establishing a set of services associated with the browser, said set of services depending on the specific attachment point;

forwarding the query to the information source;

receiving from the information source a response to the query;

selecting a method of filtering to apply to the response as a function of the set of services associated with the browser;

modifying by filtering the response according to the method of filtering to provide a modified response; and

forwarding the modified response to the browser.

13. The method of claim 12, wherein the step of establishing a set of services for the browser comprises at least one of:

implying proxy parameters from a browser query; and

configuring proxy parameters for a browser in response to a fetched form.

14. The method of claim 13, wherein the step of configuring the proxy parameters includes:

modifying a proxy configuration parameter database according to information contained in response to the fetched form; and

sending a status response back to the browser.

15. The method of claim 12, wherein the step of modifying the response as a function of the set of services established for the browser includes the step of providing to the browser an advance indication of characteristics of information retrieved.

16. The method of claim 15 wherein the step of providing an advance indication of the characteristics of the information retrieved comprises at least one of:

annotating a physical size of a data file on the proxy;

annotating file type characteristics;

annotating a file content classification on the proxy.

17. The method of claim 12 wherein the step of modifying the response comprises splitting pages of information into smaller components and said step of forwarding includes forwarding only a portion of the smaller components.

18. The method of claim 12 wherein the step of modifying the response comprises removing at least one of:

text comments;

forms;

backgrounds;

graphic images;

embedded document markup and control language instructions; and

boilerplate HTML commands.

19. The method of claim 12 wherein the step of modifying the response comprises at least one of:

reducing an image in size by re-encoding the image using a compression algorithm; and

limiting a maximum size of a graphic image.

20. The method of claim 12 wherein the step of modifying the response comprises replacing an image with at least one of:

a textual reference to its size; and

a reference name to local cache of the image.

21. The method of claim 12 wherein the step of modifying the response comprises reformatting tables.

22. The method of claim 12 wherein the step of modifying the response comprises at least one of:

minimizing universal resource locator (URL) prefixes; and

restricting access to URL, classes.

23. A method of accessing and retrieving information in a networked data communications system having a proxy comprising:

recording at the proxy a set of services associated with a browser;

sending a query from the browser to the proxy, the query being directed to an information source;

selecting a method of filtering to apply to the query received from the browser as a function of the set of services associated with the browser;

modifying at least one of the query and a response to the query according to the method of filtering;

sending from the browser to the proxy a request to change the set of services associated with the browser; and

re-defining the set of services associated with the browser upon receipt at the proxy of a request to access a configuration page at the proxy.

24. The method of claim 23 wherein the step of sending the query comprises accessing the configuration page at the proxy.

25. The method of claim 23 wherein the step of recording comprises:

registering the browser on the proxy;

establishing an initial default level of services; and

associating the initial default level of services with the browser.

26. A method of accessing and retrieving information by a proxy in a networked data communications system comprising:

associating a set of services with each of a plurality of proxy attachment points;

receiving a query at a proxy attachment point from a browser;

selecting a method of filtering to apply to the query as a function of the set of services associated with the proxy attachment point;

modifying the query by the proxy according to the method of filtering to provide a modified query;

forwarding the modified query to an information source;

receiving at the proxy from the information source a response to the modified query; and

forwarding the response to the browser.

27. A method of accessing and retrieving information by a proxy in a networked data communications system comprising:

associating a set of services with each of a plurality of proxy attachment points;

receiving a query at a proxy attachment point from a browser;

forwarding the query to an information source;

receiving at the proxy from the information source a response to the query;

modifying the response by the proxy according to the set of services associated with the proxy attachment point to provide a modified response; and

forwarding the modified response to the browser.

28. A method of accessing and retrieving information in a networked data communications system comprising:

receiving from a browser at a proxy a query directed to an information source;

modifying the query by the proxy to provide a modified query;

forwarding the modified query to another information source;

receiving at the proxy from the another information source a response to the modified query;

modifying the response by the proxy to provide a modified response; and

forwarding the modified response to the browser.