GCache is a Python module that provides a generic
cache class useful for speeding up any application
where objects are referenced by keys. It uses
object metadata to optimize hit-rates and
freshness for fetches, and uses a "write-through"
mechanism for writes and deletes. It can use
"if-modified-since" fetches or rsync delta updates
to refresh stale cached objects. GSource classes
are provided for generating useful metadata from
common sources (os.stat calls and MIME headers). A
simple example urlCache is implemented that
supports HTTP 1.1 (rfc2616) cache-control and
expire headers to ensure freshness. Also included
is an rfc2616 package useful for parsing HTTP 1.1
headers, and a PCache package implementing a
persistant cache using a Python shelve.
