- From: Brian Behlendorf <brian@organic.com>
- Date: Wed, 16 Aug 1995 22:20:42 -0700 (PDT)
- To: Shel Kaphan <sjk@amazon.com>
- Cc: masinter@parc.xerox.com, sjk@amazon.com, http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com
On Wed, 16 Aug 1995, Shel Kaphan wrote: > What about servers that are constantly creating dynamic documents? > If they're 1 minute ahead, none of their documents will be cacheable. RealTime ServerTime Action 12:00 12:01 C: GET /this-dynamic-object S: 200 Ok Last-Modified: some-old-time (some-old-time calculated by determining age of the data it assembles to produce the page) 12:05 12:06 C: GET /this-dynamic-object If-modified-since: some-old-time S: 304 Not Modified (the calculation to check last_modified of the data is much faster than assembling the whole page) 12:07 12:08 (some data changes on the server which affects this-dynamic-object) 12:08 12:09 C: GET /this-dynamic-object IMS: some-old-time S: 200 Ok Last-Modified: 12:08 Only objects which truly change with every minute (i.e., the data used to determine what the page looks like) need be uncacheable. Brian --=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-- brian@organic.com brian@hyperreal.com http://www.[hyperreal,organic].com/
Received on Wednesday, 16 August 1995 22:20:35 UTC