server_connection: don't respond SETTINGS ACK for received SETTINGS ACK

2 files changed, 3 insertions, 1 deletions

diff --git a/examples/local_server.rb b/examples/local_server.rb
index 712c4eb..fda0092 100644
--- a/examples/local_server.rb
+++ b/examples/local_server.rb
@@ -109,6 +109,7 @@ loop do
   end if DEBUG
 
   plum.on(:stream) do |stream|
+    log(id, stream.id, "stream open")
     stream.on(:stream_error) do |exception|
       puts exception
       puts exception.backtrace
diff --git a/lib/plum/server_connection.rb b/lib/plum/server_connection.rb
index 2ffa5c9..de41033 100644
--- a/lib/plum/server_connection.rb
+++ b/lib/plum/server_connection.rb
@@ -110,6 +110,7 @@ module Plum
     def process_control_frame(frame)
       case frame.type
       when :settings
+        return if frame.flags.include?(:ack)
         process_settings(frame)
         callback(:settings, @remote_settings)
         @state = :initialized if @state == :waiting_for_settings
@@ -125,7 +126,7 @@ module Plum
       when :data, :headers, :priority, :rst_stream, :push_promise, :continuation
         raise Plum::ConnectionError.new(:protocol_error)
       else
-        raie Error.new("unknown frame type: #{frame.inspect}")
+        raise Error.new("unknown frame type: #{frame.inspect}")
       end
     end