Edge caching using HTTP headers

摘要

Disclosed is a program for pre-fetching resources. A computer, communicatively coupled to a plurality of client computers and a server computer, identifies a resource, through an examination of one or more HTTP server logs, that is cached on at least one of the plurality of client computers and has been validated by the server computer. The computer determines to pre-fetch the resource based on one or more predefined rules, at least one of the predefined rules including a threshold number of responses validating the resource that must be received by the computer. The computer pre-fetches and caches the resource from the server computer. The computer receives a request for the resource from a client computer that does not have the resource cached. The computer validates resource cached locally and sends the resource to the client computer from the local cache on the computer.

主权项

1. A computer program product for pre-fetching content, the computer program product comprising:
one or more computer-readable tangible storage devices and program instructions, stored on the one or more computer-readable tangible storage devices, which when executed; identify at least one resource, through an examination of one or more HTTP server logs, that is cached on at least one of a plurality of client computers and has been validated by a server computer; determine to pre-fetch the at least one resource based on one or more predefined rules, at least one of the predefined rules including a threshold number of responses validating the at least one resource; pre-fetch the at least one resource from the server computer; cache the at least one resource locally; receive a request for the at least one resource from a client computer, of the plurality of client computers, that does not have the at least one resource cached on the client computer; and send the at least one resource to the client computer from the local cache; and prior to caching the at least one resource locally:
responsive to determining that an HTTP header includes a cache-control directive that dictates that the at least one resource should not be cached, set a flag associated with the at least one resource to indicate that the at least one resource is locally cacheable.