d4d1668864
This is the start of wiring up the HTTP/2 Transport. It is still disabled in this commit. This change does two main things: 1) Transport.RegisterProtocol now permits registering "http" or "https" (they previously paniced), and the semantics of the registered RoundTripper have been extended to say that the new sentinel error value (ErrSkipAltProtocol, added in this CL) means that the Transport's RoundTrip method proceeds as if the alternate protocol had not been registered. This gives us a place to register an alternate "https" RoundTripper which gets first dibs on using HTTP/2 if there's already a cached connection. 2) adds Transport.TLSNextProto, a map keyed by TLS NPN/ALPN protocol strings, similar in feel to the existing Server.TLSNextProto map. This map is the glue between the HTTP/1 and HTTP/2 clients, since we don't know which protocol we're going to speak (and thus which Transport type to use) until we've already made the TCP connection. Updates #6891 Change-Id: I7328c7ff24f52d9fe4899facabf7ecc5dcb989f3 Reviewed-on: https://go-review.googlesource.com/16090 Reviewed-by: Andrew Gerrand <adg@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> |
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