def _RestartHttpServerForwarderIfNecessary(self):
"""Restarts the forwarder if it's not open."""
# Checks to see if the http server port is being used. If not forwards the
# request.
# TODO(dtrainor): This is not always reliable because sometimes the port
# will be left open even after the forwarder has been killed.
if not ports.IsDevicePortUsed(self.adb, self._forwarder_device_port):
self._ForwardPortsForHttpServer()
def _CheckDevicePortStatus(adb, port):
"""Returns whether the provided port is used."""
return _WaitUntil(lambda: ports.IsDevicePortUsed(adb, port))