There is a rate limit option you can set if you are using reproxy_url.
There's a header you can set that is supposed to limit the rate of the
download to whatever you set. So I would look over the documentation
for reproxy_url and see if that will work for you.

On Sun, Jul 19, 2009 at 11:46 PM, supergui<nginx-forum@nginx.us> wrote:
> I want to write a module to transfer files to client, but it need to limit the speed of transfer.
> how can i implement it ?
>
> it is likely that i should output one buffer per time, and then check the avg speed before, if expire the setting speed what should i do then?
>
> Posted at Nginx Forum: http://forum.nginx.org/read.php?2,4234,4234#msg-4234
>
>
>