Re: HTTP/2 Upgrade with content?

On Fri, 13 Mar 2015, Stefan Eissing wrote:

> - hear from clients what they prefer/expect. there could be a response 
> header "upgrade: no-conten" or such

Not accepting a POST immediately will be surprising to users. There are quite 
a few users in the wild today that run curl like this:

  $ curl -d lotsofdata [URL]

which thus sends a POST immediately with that data over HTTP/1.1, and the same 
thing for HTTP/2 is almost identical, just adding asking for http2:

  $ curl --http2 -d lotsofdata [URL]

which will make a POST with an Upgrade: h2c header and Expect: 100-continue.

If a server then suddenly doesn't handle the POST + upgrade it puts a rather 
arbitrary (from the client's perspective) block on when a client can or 
cannot switch to HTTP/2 on such a server.

-- 

  / daniel.haxx.se