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-rw-r--r--actioncable/lib/action_cable/connection/stream.rb6
1 files changed, 4 insertions, 2 deletions
diff --git a/actioncable/lib/action_cable/connection/stream.rb b/actioncable/lib/action_cable/connection/stream.rb
index 4873026b71..e658948a55 100644
--- a/actioncable/lib/action_cable/connection/stream.rb
+++ b/actioncable/lib/action_cable/connection/stream.rb
@@ -98,8 +98,10 @@ module ActionCable
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"]
+ # This should return the underlying io according to the SPEC:
+ @rack_hijack_io = @socket_object.env["rack.hijack"].call
+ # Retain existing behaviour if required:
+ @rack_hijack_io ||= @socket_object.env["rack.hijack_io"]
@event_loop.attach(@rack_hijack_io, self)
end