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Refreshing cached documents and storing differential document content

  • US 8,639,742 B2
  • Filed: 07/16/2012
  • Issued: 01/28/2014
  • Est. Priority Date: 06/30/2004
  • Status: Active Grant
First Claim
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1. A method for updating a cache, comprising:

  • at a server remote from a host and having one or more processors and memory storing one or more programs for execution by the one or more processors;

    identifying from freshness parameters associated with a respective document identifier for a respective document in the cache whether certain preconditions have been met;

    retrieving, when the preconditions have been met, a first document content from the remote host;

    calculating a first content fingerprint for the first document content;

    storing the first document content in the cache;

    calculating a content difference between the first document content and a second document content associated with the respective document identifier;

    storing the content difference; and

    associating the respective document identifier with the content difference.

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