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[英]WebSocket Handler on_close method async Implementation tornado
[英]close method of Tornado's WebsocketClientConnection doesn't invoke on_close method of Websocket Handler
我有一個像這樣的WebsocketHandler:
class MyHandler(WebSocketHandler):
def open(self, *args, **kwargs):
self.application.logger.info('WebSocket connection opened from %s', self.request.remote_ip)
def on_close(self):
self.application.logger.info('WebSocket connection closed')
def on_message(self, message):
self.write_message(message)
我有一些使用pytest的測試,如下所示:
@pytest.fixture
def app(request):
request.cls.app_fixture = create_app(TornadoConfig)
@pytest.mark.usefixtures("app")
class TestWebSocket(testing.AsyncHTTPTestCase):
def get_app(self):
return self.app_fixture
def setUp(self):
super(TestWebSocket, self).setUp()
server = httpserver.HTTPServer(self.app_fixture)
self.socket, self.port = testing.bind_unused_port()
server.add_socket(self.socket)
def _mk_client(self):
client = websocket_connect('ws://localhost:{}/ws/'.format(self.port))
TestWebSocket.clients.append(client)
return client
@testing.gen_test
def test_auto_complete(self):
client = yield self._mk_client()
client.write_message('test')
response = yield client.read_message()
assert response == 'test'
client.close()
雖然我跟蹤了它,並且確定可以調用close
方法,但是client.close()
對MyHandler
沒有任何影響,並且永遠不會調用on_close
!
client.close()
將導致MyHandler.on_close
被調用,但尚未被調用,並且當測試方法返回時,它永遠不會有機會。 如果要確保調用了on_close
則必須等待on_close
被調用,而不是在client.close()
返回后立即返回。 請參閱例如Tornado對websocket功能的測試: https : //github.com/tornadoweb/tornado/blob/43e23f977715396ce243c6cd7e3387abf2a2e4ee/tornado/test/websocket_test.py#L44
我使用ThreadPoolExecutor
解決了我的問題,所以我創建了一個thread_pool
:
thread_pool = ThreadPoolExecutor(1)
並編寫了另一個關閉客戶端連接的方法:
def close_ws(self, client):
client.close()
time.sleep(1)
self.close_future.set_result('done')
在測試方法的最后,我做了:
self.thread_pool.submit(self.close_ws, client)
yield self.close_future
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