Await _connect and inline read_messages callback to _connect #350
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This PR should fix an issue with the gateway handler introduced by the switch to native async function for the
_connect
function in the gateway websocket handler (which originally used the @gen coroutine version fromtornado
)._connect
should now be properly awaited through IOLoop'sspawn_callback
mechanism.@kevin-bates recommended a PR based on this discussion jupyter-server/enterprise_gateway#903.