I'm personally quite concerned about trying to figure out the content-length in any Rack middleware. It's expensive to do in pure-ruby, and a later middleware can mess with the size anyway and be forced to recalculate. I think the appropriate place for this calculation is in the actual server that sends the data to the client, where it can be done once and in C.

-- Yehuda

On Thu, Aug 13, 2009 at 9:18 AM, Jeremy Kemper <jeremy@bitsweat.net> wrote:

On Thu, Aug 13, 2009 at 5:14 AM, Christian
Neukirchen<chneukirchen@gmail.com> wrote:
>
> Jeremy Kemper <jeremy@bitsweat.net> writes:
>
>> CommonLogger's concern
>> is logging the request, not calculating content length edge cases
>
> The CLF includes the real response size, though.  It should be correct
> if you want to do traffic analysis with the existing tools.

There is no standard "real" size. Most log the size of the entity body
as represented by Content-Length. Some include HTTP header size. Few
actually record the number of bytes sent to the client (mog_logio for
apache does).

jeremy

--
Yehuda Katz
Developer | Engine Yard
(ph) 718.877.1325