I think the most common scenario for URL blocking services would be
to send (in NR)
Wont-Look-Body: 2147483647
rather than
Wont-Send-Body: 2147483647
It will be
Wont-Look-Body: 0
because as you said before:
Not only Wont-Use tells the processor that preserving those bytes for
this service is a waste, but that _sending_ those bytes is a waste.
The processor SHOULD terminate the message with AME/206 after sending
all original bytes up to the Wont-Use point. Right?
I described now:
An OPES processor SHOULD behave as if it receives a Wont-Look
message at the time that it will have sent the given
number of OCTETs of the application message body part, for example,
if the Wont-Look-Body value is zero in an HTTP response profile, the
OPES processor SHOULD send an AME message with result code 206 after
sending the response-header message part and before starting with the
response-body message part.
Martin