完整报错如下:
(Python3.6) appleyuchi@ubuntu19:5.2-使用Tornado进行长轮询$ python shopping_cart.py
[I 200409 20:55:43 web:2162] 200 GET / (::1) 1.99ms
[I 200409 20:55:43 web:2162] 200 GET /static/images/internet.jpg (::1) 3.80ms
[I 200409 20:55:43 web:2162] 200 GET /static/scripts/inventory.js?v=081e5ab58d037c4cc17adb713e0b601b (::1) 0.66ms
[E 200409 20:55:43 web:1670] Uncaught exception GET /cart/status?session=a59525ab-ef55-4f2d-989a-90baea6d6578 (::1)
HTTPServerRequest(protocol='http', host='localhost:8000', method='GET', uri='/cart/status?session=a59525ab-ef55-4f2d-989a-90baea6d6578', version='HTTP/1.1', remote_ip='::1')
Traceback (most recent call last):
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/tornado/web.py", line 1548, in _stack_context_handle_exception
raise_exc_info((type, value, traceback))
File "<string>", line 4, in raise_exc_info
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/tornado/web.py", line 1756, in wrapper
result = method(self, *args, **kwargs)
File "shopping_cart.py", line 64, in get
self.application.shoppingCart.register(self.async_callback(self.on_message))
AttributeError: 'StatusHandler' object has no attribute 'async_callback'
故障原因：
代码一般出自Tornado2.x
解决方案:
self.application.shoppingCart.register(self.async_callback(self.on_message))
改成:
self.application.shoppingCart.register(callback=self.on_message)
