HTTP/2 without TLS does not work

[onitake]

For debugging, it would be useful if h2c also supported raw HTTP/2 without first establishing a TLS channel.
This is currently not possible, h2c will just fail.

Could you add this with an additional command line option or a fallback?

[JonathanHenson]

Someone who desperately needs a usable http2 tester, +1000 for needing non-tls connections... especially when I'm hitting localhost.

[onitake]

I found some alternatives:

• curl --http2 --http2-prior-knowledge can do raw HTTP/2.
• h2load does load tests and also supports insecure mode
• Possibly some of these work too: https://github.com/http2/http2-spec/wiki/Tools

[aep]

i quickly hacked it to remove TLS https://github.com/aep/h2c
this is a crappy hack but maybe its useful for someone else.

[guilt]

I really think we should add non-TLS/h2c support in this client. This is often a well referenced tool when it comes to testing, and there are great usecases for not running TLS and not running a connection upgrade every time.