Re: 1xx response forwarding and ignore_expect_100

tis 2010-08-24 klockan 17:16 -0600 skrev Alex Rousskov:

> RFC 2616 implies that we must forward 100-continue to HTTP/1.0 clients
> that send Expect: 100-continue header

I know, and something I disagree with. HTTP/1.0 says:

9.1 Informational 1xx

   This class of status code indicates a provisional response,
   consisting only of the Status-Line and optional headers, and is
   terminated by an empty line. HTTP/1.0 does not define any 1xx status
   codes and they are not a valid response to a HTTP/1.0 request.
   However, they may be useful for experimental applications which are
   outside the scope of this specification.

Plus 7.2 Entity Body

   All 1xx (informational), 204 (no content), and
   304 (not modified) responses must not include a body.

which makes 1xx forwarding via a HTTP/1.0 proxy practically impossible.

At the same time HTTP/1.0 says nothing about Expect or Via.

Result is very likely breakdown if there is an HTTP/1.0 proxy in the
path as thi to the HTTP/1.1 server is indistinguisible from an directly
connected HTTP/1.0 client using Expect: 100-continue.

Not sure we have discussed this on HTTPbis. Dropped a mail there now to
discuss this.

Regards
Henrik
Received on Wed Aug 25 2010 - 00:05:20 MDT