HTTP Support from Protocols - Http2 Spike

[eperinan]

This issue comes from #182.

After #203, we need to enable HTTP2 like this example https://github.com/http4s/http4s/blob/ecf32b9377997f17ed4c8858ec1471d0836d8522/examples/blaze/src/main/scala/com/example/http4s/blaze/BlazeHttp2Example.scala.

[L-Lavigne]

Just a quick note that HTTP/2 support with .enableHttp2() is ignored (with a logged warning) unless TLS is also enabled. I think this is done with .withSSLContext() but my quick testing with that wasn't conclusive. The http4s docs and issues seem a bit vague on the status of HTTP/2 support on the client side.

[juanpedromoreno]

I think this spike has been already done by @L-Lavigne . Thanks for doing it!

[L-Lavigne]

As discussed offline we'll keep this issue open for now, and find out if client-side HTTP/2 support in http4s/blaze is mature enough for us to use.

[juanpedromoreno]

This is probably a bit outdated. Closing it for now.