pipe mode and sendfile?

[Poul-Henning Kamp]

--------
In message <CABoVN9DfHVJ7VUznjSzRxCg4inzgOoqg6GdXGhiZqfo=D7SnZw at mail.gmail.com>
, Dridi Boukelmoune writes:

>> It's bad enough to pipe half the HTTP streams to one backend and
>> the other half to the other.  Think for instance about how we would
>> merge the two backend->client HPACK state into one.
>
>You're not supposed to do that, HPACK is maintained as a one-way
>compression between two parties and cannot be shared with
>third-parties.

That just means that we would have to decompress and recompress
all the streams, in which case we might as well return(pass).

>We need CONNECT piping to comply with the RFC, and as I said in
>previous comments, I believe that's the only kind of "true" pipe we
>can do in H2, and it's stream-based.

No, we can also do transparent piping, for instance based on ACL
matches and similar.


-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.