METHODS AND SYSTEMS FOR IMPLEMENTING URL MASKING

• US 20100180082A1
• Filed: 09/30/2009
• Published: 07/15/2010
• Est. Priority Date: 01/12/2009
• Status: Abandoned Application

• Current Assignee: ViaSat Incorporated
• Original Assignee: ViaSat Incorporated
• Inventors: Sebastian, William B., Newman, Dan
• Application Number:
  US12/571,281
• Publication Number:
  US 20100180082A1
• Time in Patent Office: Days
• US Class Current: 711/126
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching

Abstract

A method includes receiving a web content request including a URL string for locating the web content, and comparing the URL string to a list of URLs for which prefetched responses are available to see if the request can be fulfilled from these responses. The method further includes using a mask that excludes portions of the URL string that are not relevant to finding or selecting the web content when comparing the request to the list of prefetched URLs. If the request URL string matches the URL of a prefetched response other than the masked section, then the prefetched response can be supplied as a response to the incoming response. The method further includes parsing Java scripts in a web response to search for URLs that may be rendered on a web page and analyzing the scripts to identify bytes in the URL that would have random values.

Claims

1. A method of implementing URL masking, the method comprising:

receiving, at a terminal, a web content request including a URL string for locating the web content;

comparing, at a parser module on the terminal, the URL string to a list of URLs for which prefetched responses are available to determine if the request can be fulfilled from the prefetched responses;

using a mask that excludes portions of the URL string that are not relevant to finding or selecting web content when comparing the request to the list of prefetched URLs;

if the masked URL string matches the URL of one of the prefetched responses, supplying the prefetched response to be used as a response to the incoming request;

parsing scripts in a web response to search for URLs that are rendered on a web page;

analyzing the scripts to identify bytes in the URL that generate random values; and

generating a mask which indicates bytes that are random and that are to be excluded from a comparison in order to determine whether the prefetched response can be used to response to the web content request.

2. A method of implementing URL masking according to claim 1, wherein the random values in the URL string comprise a cache busting string.

3. A method of implementing URL masking according to claim 1, wherein the web content request is a Java script.

4. A method of implementing URL masking according to claim 3, further comprising parsing, at the parser module, the Java script to identify an embedded URL.

5. A method of implementing URL masking according to claim 4, further comprising in response to identifying an embedded URL, determining the process in which the embedded URL was constructed.

6. A method of implementing URL masking according to claim 5, wherein the process comprises:

executing a random number generator to produce a binary string;

converting the binary string into an ASCI string; and

inserting the ASCI string into the embedded URL.

7. A method of implementing URL masking according to claim 6, wherein the embedded URL is the URL string and the ASCI string is the unrelated portion of the URL string.

8. A method of implementing URL masking according to claim 1, wherein the unrelated portion of the URL string is generated using a timestamp value.

9. A method of implementing URL masking according to claim 8, further comprising removing at least a portion of the timestamp value from the URL string to mask the URL string.

10. A method of implementing URL masking according to claim 1, further comprising comparing the masked URL with cached URLs in the terminal'"'"'s cache.

11. A method of implementing URL masking according to claim 10, further comprising in response to determining that the masked URL matches one of the cached URLs, rendering the web content associated with the cached URL at the terminal.

12. A method of implementing URL masking according to claim 11, wherein the cache is a squid web proxy cache.

13. A method of implementing URL masking according to claim 11, wherein the cache is a browser cache.

14. A method of implementing URL masking according to claim 1, the terminal is a satellite terminal.

15. A system for implementing URL masking, the system comprising:

a gateway configured to receive a web content request including a URL string for locating the web content; and

a terminal in communication with the gateway, the terminal configured to receive the web content request form the gateway, compare the URL string to a list of URLs for which prefetched responses are available to determine if the request can be fulfilled from the prefetched responses, use a mask that excludes portions of the URL string that are not relevant to finding or selecting web content when comparing the request to the list of prefetched URLs, if the masked URL string matches the URL of one of the prefetched responses, supply the prefetched response to be used as a response to the incoming request, parse scripts in a web response to search for URLs that are rendered on a web page, analyze the scripts to identify bytes in the URL that generate random values, generate a mask which indicates bytes that are random and that are to be excluded from a comparison in order to determine whether the prefetched response can be used to response to the web content request.

16. The system for implementing URL masking according to claim 15, wherein the gateway is a satellite gateway and the terminal is a subscriber terminal.

17. The system for implementing URL masking according to claim 16, wherein the satellite gateway and the subscriber terminal are in communication via a satellite link.

18. A gateway configured to implementing URL masking, the gateway comprising:

an accelerator module configured to receive a web content request including a URL string for locating the web content, wherein the accelerator module includes;

a parser module configured to analyze the URL string to determine if the URL string includes a portion within the string that is unrelated to locating the web content;

a masker module coupled with the parser module, the masker module configured to, in response to determining that the URL string includes a portion that is unrelated to determining the location of the web content, create a mask that indicates which bytes are to be excluded from the URL string when determining whether a request matches a prefetched or cached response; and

a prefetcher module coupled with the masker module, the prefetcher module configured to compare the masked URL string with prefetched URL strings stored by the prefetcher module, and in response to the masked URL matching one of the prefetched URL string, retrieve a prefetched object associated with the one of the prefetched URL strings; and

a gateway transceiver module in communication with the accelerator module, the gateway transceiver module configured to receive the prefetched object and transmit the prefetched object to a terminal.

19. A gateway configured to implementing URL masking according to claim 18, wherein the unrelated portion of the URL string is a cache busting string.

20. A machine-readable medium for implementing URL masking, which includes sets of instructions which, when executed by a machine, cause the machine to:

receive, at a terminal, a web content request including a URL string for locating the web content;

compare, at a parser module on the terminal, the URL string to a list of URLs for which prefetched responses are available to determine if the request can be fulfilled from the prefetched responses;

use a mask that excludes portions of the URL string that are not relevant to finding or selecting web content when comparing the request to the list of prefetched URLs;

if the masked URL string matches the URL of one of the prefetched responses, supply the prefetched response to be used as a response to the incoming request;

parse scripts in a web response to search for URLs that are rendered on a web page;

analyze the scripts to identify bytes in the URL that generate random values; and

generate a mask which indicates bytes that are random and that are to be excluded from a comparison in order to determine whether the prefetched response can be used to response to the web content request.