Distributed web object identification for web caching

摘要

In some embodiments, a request for a content object may be received as a data packet. Upon determining that the content object is not cached, an element of the data packet may be modified and the modified data packet may be forwarded toward a content provider of the content object.

主权项

1. A method comprising:
receiving a request for a content object at a first proxy caching (PC) engine, the request comprising a request packet; determining whether the content object is cached at the first PC engine; and in response to determining that the content object is not cached at the first PC engine:
modifying an element of the request packet, wherein modifying the element of the request packet comprises add an accept-encoding header in the request packet, the accept-encoding header providing an indication to an upstream PC engine that the first PC engine accepts a fingerprint associated with the content object,forwarding the modified request packet toward a second PC engine, andreceiving a response to the forwarded request packet from the second PC engine, the response comprising the forwarded request packet with a second modification in the accept-encoding header.