class Protocol::Rack::Adapter::Generic

def self.extract_protocol(env, response, headers)
	if protocol = response.protocol
		# This is the newer mechanism for protocol upgrade:
		if env["rack.protocol"]
			headers["rack.protocol"] = protocol
		
		# Older mechanism for protocol upgrade:
		elsif env[CGI::HTTP_UPGRADE]
			headers["upgrade"] = protocol
			headers["connection"] = "upgrade"
		end
	end
end