Re: Last-Modified vs. Expires

Hi,

Oskar Pearson wrote:
> Do something like 'exponential back-off' where you obey the TTL's for
> the page, but keep a CRC or something. When the page is next downloaded,
> and if it is the same then keep a record saying 'keep this object for
> 2x the amount it says to keep it'.

How about storing the Content-MD5, if it exists, and promoting its
use? How about ETags? If the Content-MD5 doesn't exist then
generate it on the fly (though I proposed this a while back and it
comes out a bad idea)
 
> I know that there is currently no way of keeping state, and that it
> would probably use huge amounts of disk space :)

and RAM if you keep the MD5 in the object info as part of the struct.
Another 16 bytes for a 128-bit checksum.

-- 
miguel a.l. paraz  <map@iphil.net>                              +63-2-750-2288
iphil communications, makati city, philippines          <http://www.iphil.net>