There is no real reason why this has to be the default.

Author: ioquatix

lib/protocol/http2/client.rb

@@ -28,18 +28,6 @@ def send_connection_preface(settings = [])
 				if @state == :new
 					@framer.write_connection_preface
 
-					# We don't support RFC7540 priorities:
-					if settings.is_a?(Hash)
-						settings = settings.dup
-					else
-						settings = settings.to_h
-					end
-					
-					unless settings.key?(Settings::NO_RFC7540_PRIORITIES)
-						settings = settings.dup
-						settings[Settings::NO_RFC7540_PRIORITIES] = 1
-					end
-					
 					send_settings(settings)
 
 					yield if block_given?

lib/protocol/http2/framer.rb

@@ -22,7 +22,7 @@ module HTTP2
 		FRAMES = [
 			DataFrame,
 			HeadersFrame,
-			nil, # PriorityFrame is deprecated / removed.
+			nil, # PriorityFrame is deprecated and ignored, instead consider using PriorityUpdateFrame instead.
 			ResetStreamFrame,
 			SettingsFrame,
 			PushPromiseFrame,

lib/protocol/http2/server.rb

@@ -28,18 +28,6 @@ def read_connection_preface(settings = [])
 				if @state == :new
 					@framer.read_connection_preface
 
-					# We don't support RFC7540 priorities:
-					if settings.is_a?(Hash)
-						settings = settings.dup
-					else
-						settings = settings.to_h
-					end
-					
-					unless settings.key?(Settings::NO_RFC7540_PRIORITIES)
-						settings = settings.dup
-						settings[Settings::NO_RFC7540_PRIORITIES] = 1
-					end
-					
 					send_settings(settings)
 
 					read_frame do |frame|

test/protocol/http2/client.rb

@@ -34,7 +34,7 @@
 
 			client_settings_frame = framer.read_frame
 			expect(client_settings_frame).to be_a Protocol::HTTP2::SettingsFrame
-			expect(client_settings_frame.unpack).to be == settings + [[Protocol::HTTP2::Settings::NO_RFC7540_PRIORITIES, 1]]
+			expect(client_settings_frame.unpack).to be == settings
 
 			# Fake (empty) server settings:
 			server_settings_frame = Protocol::HTTP2::SettingsFrame.new
@@ -63,16 +63,6 @@
 		end.to raise_exception(Protocol::HTTP2::ProtocolError, message: be =~ /First frame must be Protocol::HTTP2::SettingsFrame/)
 	end
 
-	it "should send connection preface with no RFC7540 priorities" do
-		server_settings_frame = client.send_connection_preface({}) do
-			client_settings_frame = server.read_connection_preface({})
-			
-			expect(client_settings_frame.unpack).to be == [[Protocol::HTTP2::Settings::NO_RFC7540_PRIORITIES, 1]]
-		end
-		
-		expect(server_settings_frame.unpack).to be == [[Protocol::HTTP2::Settings::NO_RFC7540_PRIORITIES, 1]]
-	end
-	
 	it "can generate a stream id" do
 		id = client.next_stream_id
 		expect(id).to be == 1

test/protocol/http2/server.rb

@@ -78,7 +78,7 @@
 		# The server immediately sends its own settings frame...
 		frame = framer.read_frame
 		expect(frame).to be_a Protocol::HTTP2::SettingsFrame
-		expect(frame.unpack).to be == server_settings + [[Protocol::HTTP2::Settings::NO_RFC7540_PRIORITIES, 1]]
+		expect(frame.unpack).to be == server_settings
 
 		# And then it acknowledges the client settings:
 		frame = framer.read_frame