Tempesta must properly implement large uploads using Expect header. See What Proxies Must Do, "5. Meet Expectations", for motivation.
There were ambiguity in RFC 2616 "8.2.1 Persistent Connections and Flow Control" regarding affecting Expect header on POST requests retrying, which lead to serious problems. RFC 7230 explicitly prohibit the statement in A.2.:
The requirement to retry requests under certain circumstances when
the server prematurely closes the connection has been removed.
Expect must also correctly work for Upgrade header, see RFC 7230 6.7
Tempesta must properly implement large uploads using Expect header. See What Proxies Must Do, "5. Meet Expectations", for motivation.
There were ambiguity in RFC 2616 "8.2.1 Persistent Connections and Flow Control" regarding affecting Expect header on POST requests retrying, which lead to serious problems. RFC 7230 explicitly prohibit the statement in A.2.:
Expect must also correctly work for
Upgradeheader, see RFC 7230 6.7