On Feb 7, 2008, at 2:28 PM, Colm MacCarthaigh wrote:
On Thu, Feb 07, 2008 at 12:39:14PM +0100, Dirk-Willem van Gulik wrote:
Have a look at the ntp protocol - it is fairly effective at this -
and I would not rule out that you'd be able to do something similar
(abeit less accurate) on a keep-alive connection.
NTP does it via phase-lock loop, and it's pretty clever alright, a PLL
could be applied to the back and forth traffic for HTTP alright, as
long
as the implementor took great care to work around things like accept
filters (so throw away the first session). It'd be interesting,
mod_youre_on_sattellite_broadband ;-)
I just tried it with a bit of ajaxy/javascript on a keep alive
connection - but did not get very far - no convergence -- but that may
be as the CGI is not called with predictable enough a delay -- a
module may be indeed what is needed.
Dw
