вот что я нашел похожее по этому поводу,
но непонятно как это применить для reply_body вместо request_body
On Mon, 26 Apr 2004, Michael Gale wrote:
> Can I use "request_body_max_size" inside a acl ?
There only is one single limit in this directive.
But it is possible to invent a new acl for this using the external acl
interface. request_body_max_size looks into the Content-Length request
header, available to external_acl_type as %{Content-Length}
This silly shell script should work
#!/bin/sh
while read line; do
set -- $line
length="$1"
limit="$2"
if [ "$length" -le "$2" ]; then
echo OK
else
echo ERR
fi
done
Use this as
external_acl_type request_body %{Content-Length} /path/to/above/script
acl request_max_20MB request_body 20971520
This acl can then be used in http_access to match requests up to the given
size. If you need different sizes just define new acls with different
limits in bytes (20971520 == 20480 * 1024 == 20480 KB)
Regards
Henrik