Import the relevant portions of faye-websocket

(as adapted to use concurrent-ruby / nio4r instead of eventmachine)

1 files changed, 59 insertions, 0 deletions

diff --git a/actioncable/lib/action_cable/connection/stream.rb b/actioncable/lib/action_cable/connection/stream.rb
new file mode 100644
index 0000000000..ace250cd16
--- /dev/null
+++ b/actioncable/lib/action_cable/connection/stream.rb
@@ -0,0 +1,59 @@
+module ActionCable
+  module Connection
+    #--
+    # This class is heavily based on faye-websocket-ruby
+    #
+    # Copyright (c) 2010-2015 James Coglan
+    class Stream
+      def initialize(event_loop, socket)
+        @event_loop    = event_loop
+        @socket_object = socket
+        @stream_send   = socket.env['stream.send']
+
+        @rack_hijack_io = nil
+
+        hijack_rack_socket
+      end
+
+      def each(&callback)
+        @stream_send ||= callback
+      end
+
+      def close
+        shutdown
+        @socket_object.client_gone
+      end
+
+      def shutdown
+        clean_rack_hijack
+      end
+
+      def write(data)
+        return @rack_hijack_io.write(data) if @rack_hijack_io
+        return @stream_send.call(data) if @stream_send
+      rescue EOFError
+        @socket_object.client_gone
+      end
+
+      def receive(data)
+        @socket_object.parse(data)
+      end
+
+      private
+        def hijack_rack_socket
+          return unless @socket_object.env['rack.hijack']
+
+          @socket_object.env['rack.hijack'].call
+          @rack_hijack_io = @socket_object.env['rack.hijack_io']
+
+          @event_loop.attach(@rack_hijack_io, self)
+        end
+
+        def clean_rack_hijack
+          return unless @rack_hijack_io
+          @event_loop.detach(@rack_hijack_io, self)
+          @rack_hijack_io = nil
+        end
+    end
+  end
+end