Hi,
I had a query with respect to section 16.9 of bis-09
which talks about how proxies must handle transport errors.
This section states that any transport layer errors (like
ICMP errors) must be interpreted as equal to receiving a
400 Bad Request. But is this the correct response code that
a network error must be equated to ? Because in this case,
neither is the request malformed, nor is it a client error.
I would assume that the correct interpretation in this case
should be a 503. Interestingly, the 503 interpretation is
prescribed for user agents as the following line from the
"General User Agent Behaviour" section shows:
Line 1162:
"If a fatal transport error is reported by the transport
layer (generally, due to fatal ICMP errors in UDP or
connection failures in TCP), the condition MUST be treated
as a 503 (Service Unavailable) status code."
Why is this difference of interpretation between UA's
and proxies. Shouldn't it be interpreted as a 503 at proxies
as well ? Was there some discussion/open-issue on this which
concluded that proxies must interpret network errors as 400 ?
Thanks in advance
Subhash Nayak.
Hughes Software Systems
http://www.hssworld.com
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