First, a quick test to ensure that we can talk to ourselves:
# Direct connection
$> ruby server.rb
$> ruby client.rb http://localhost:8080/ # GET
$> ruby client.rb http://localhost:8080/ -d 'some data' # POST
# Server push
$> ruby server.rb --push
$> ruby client.rb http://localhost:8080/ # GET
# TLS + NPN negotiation
$> ruby server.rb --secure
$> ruby client.rb https://localhost:8080/ # GET
$> ...nghttp2 (HTTP/2.0 C Library)
Public test server: http://106.186.112.116 (Upgrade + Direct)
# Direct request (http-2 > nghttp2)
$> ruby client.rb http://106.186.112.116/
# TLS + NPN request (http-2 > nghttp2)
$> ruby client.rb https://106.186.112.116/
# Direct request (nghttp2 > http-2)
$> ruby server.rb
$> nghttp -vnu http://localhost:8080 # Direct request to Ruby server# NPN + GET request (http-2 > twitter)
$> ruby client.rb https://twitter.com/For a complete list of current implementations, see http2 wiki.