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Re: Large Frame Proposal

From: Mark Nottingham <mnot@mnot.net>
Date: Tue, 8 Jul 2014 13:46:20 +1000
Cc: Poul-Henning Kamp <phk@phk.freebsd.dk>, Greg Wilkins <gregw@intalio.com>, Johnny Graettinger <jgraettinger@chromium.org>, HTTP Working Group <ietf-http-wg@w3.org>
Message-Id: <B9684C98-D3DB-4B04-8F5F-4267BFE301DA@mnot.net>
To: Roberto Peon <grmocg@gmail.com>
431, not 413.


On 8 Jul 2014, at 9:22 am, Roberto Peon <grmocg@gmail.com> wrote:

> 
> 
> 
> On Mon, Jul 7, 2014 at 4:16 PM, Poul-Henning Kamp <phk@phk.freebsd.dk> wrote:
> In message <CAP+FsNfLuFj9aFVVzy6khFBZHmB5FMeFm0+2GLSw_KVQQppyqg@mail.gmail.com>, Roberto Peon wri
> tes:
> 
> >Lets make it concrete.
> >Client A,is speaking to a proxy B, to servers C, D.
> >Server C wants a max header limit of 4k.
> >Server D wants a max header limit of 8k.
> >
> >What does proxy B do?
> 
> What is proxy B's job?
> 
> If proxy B is a corporate SOX-compliance proxy that needs your
> kerberos ticket to let you through, it will tell you that it
> takes 64K frames and send you 413 if the headerset is bigger
> than what C or D (depending on Host:) will accept, after having
> stripped the Kerberos ticket out.
> 
> Sure.
>  
> 
> If proxy B is a CDN with two servers behind RFC1149 connectivity,
> it will announce something big enough for what you might send
> and then it will file away at the headers, in contract with
> server C and D, until they are small enough to tied to the legs.
> 
> And if it can't, then it will 413 the request for lack of any other option.
>  
> 
> If proxy B is a load-balancer in front of C and D, it will
> advertise the max, ie 8K, and if you send an 8K header
> destined for server C, it will either send you a 413 or
> in contract with server C rewrite the request so server
> C gets to emit the 413.
> 
> Agreed.
> I'll note that we're still needing to send 413s from proxies/loadbalancers/gateways in many cases.
> 
> -=R
>  
> 
> --
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk@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.
> 

--
Mark Nottingham   https://www.mnot.net/
Received on Tuesday, 8 July 2014 03:46:52 UTC

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