Patent ID: 7587398
Filing Date: 2009-09-08
Classification: G06F,Y10S

Abstract:
1. A method for returning a document to a requesting user at a client, comprising: on a server system having one or more processors and memory storing programs executed by the one or more processors: receiving from a client a request comprising a URL of a requested document, a first value that identifies a first content of the requested document, wherein the first value identifies a stale version of the requested document that is stored at the client, the first value calculated as a function of the first content, and a second value, the second value calculated as a function of a second document content of another document that has a URL distinct from the URL of the requested document; identifying a current content of the requested document using the URL of the requested document; and transmitting a response to the client; wherein the method includes: when a first condition is satisfied: when a second condition is satisfied: wherein the first condition is satisfied when the first content is found and the second condition is satisfied when the first content is not found.