[BUG] Investigate: object NoneType can't be used in 'await' expression

[aktech]

Context

As mentioned by @krassowski here: #220 (review)

Quoting him:

This is not directly related to this PR as it also happens on runs with older JupyterHub, but what is a bit concerning is that the CI passes with green status when there are JupyterHub errors, so if there is a more severe issue in the future it may get by unnoticed.

I have been seeing this for a while, but haven't had the chance to investigate or fix it. It doesn't have any impact on functionality, but CI going green on this error is an issue. I have so far ignored is as this is coming from jhsingle_native_proxy, which will be replaced eventually with out custom proxy using oauth2proxy (to be created).

Value and/or benefit

• More confidence in the CI
• No noise in the logs

Anything else?

No response

[kcpevey]

This error shows up on every app deployment - even ones that are successful. I've learned to ignore it, but it would be good to get it resolved. Here is a recent deployment log:

2024-05-24 08:23:39 | [D 240524 08:23:39 auth:578] HubAuth cache miss: token:46c1ec774b254eeab818bb94a1b53979:01d5ed589b2d8f3ca45a9f6b602ff93899474db696fceeb55319ceecc461a522
-- | --
  |   | 2024-05-24 08:23:38 | TypeError: object NoneType can't be used in 'await' expression
  |   | 2024-05-24 08:23:38 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |   | 2024-05-24 08:23:38 | return await self.oauth_proxy(port, path)
  |   | 2024-05-24 08:23:38 | File "/opt/conda/envs/default/lib/python3.11/site-packages/jhsingle_native_proxy/proxyhandlers.py", line 843, in proxy
  |   | 2024-05-24 08:23:38 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |   | 2024-05-24 08:23:38 | return await self.proxy(self.port, path)
  |   | 2024-05-24 08:23:38 | File "/opt/conda/envs/default/lib/python3.11/site-packages/jhsingle_native_proxy/proxyhandlers.py", line 849, in http_get
  |   | 2024-05-24 08:23:38 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |   | 2024-05-24 08:23:38 | return await self.http_get(*args, **kwargs)
  |   | 2024-05-24 08:23:38 | File "/opt/conda/envs/default/lib/python3.11/site-packages/jhsingle_native_proxy/websocket.py", line 102, in get
  |   | 2024-05-24 08:23:38 | ^^^^^^^^^^^^
  |   | 2024-05-24 08:23:38 | result = await result
  |   | 2024-05-24 08:23:38 | File "/opt/conda/envs/default/lib/python3.11/site-packages/tornado/web.py", line 1790, in _execute
  |   | 2024-05-24 08:23:38 | Traceback (most recent call last):
  |   | 2024-05-24 08:23:38 | HTTPServerRequest(protocol='http', host='nebari.quansight.dev', method='GET', uri='/user/kcpevey@quansight.com/test-cf9b8f6/', version='HTTP/1.1', remote_ip='10.32.3.1')
  |   | 2024-05-24 08:23:38 | [E 240524 08:23:38 web:1875] Uncaught exception GET /user/kcpevey@quansight.com/test-cf9b8f6/ (10.32.3.1)
  |   | 2024-05-24 08:23:38 | [D 240524 08:23:38 auth:1398] Redirecting to login url: /hub/api/oauth2/authorize?client_id=jupyterhub-user-kcpevey%2540quansight.com-test-cf9b8f6&redirect_uri=%2Fuser%2Fkcpevey%40quansight.com%2Ftest-cf9b8f6%2Foauth_callback&response_type=code
  |   | 2024-05-24 08:23:38 | [D 240524 08:23:38 auth:835] No user identified
  |   | 2024-05-24 08:23:38 | [I 240524 08:23:38 proxyhandlers:848] SuperviseAndProxyHandler http_get 34841
  |   | 2024-05-24 08:23:38 | TypeError: object NoneType can't be used in 'await' expression
  |   | 2024-05-24 08:23:38 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |   | 2024-05-24 08:23:38 | return await self.oauth_proxy(port, path)
  |   | 2024-05-24 08:23:38 | File "/opt/conda/envs/default/lib/python3.11/site-packages/jhsingle_native_proxy/proxyhandlers.py", line 843, in proxy
  |   | 2024-05-24 08:23:38 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |   | 2024-05-24 08:23:38 | return await self.proxy(self.port, path)
  |   | 2024-05-24 08:23:38 | File "/opt/conda/envs/default/lib/python3.11/site-packages/jhsingle_native_proxy/proxyhandlers.py", line 849, in http_get
  |   | 2024-05-24 08:23:38 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |   | 2024-05-24 08:23:38 | return await self.http_get(*args, **kwargs)
  |   | 2024-05-24 08:23:38 | File "/opt/conda/envs/default/lib/python3.11/site-packages/jhsingle_native_proxy/websocket.py", line 102, in get
  |   | 2024-05-24 08:23:38 | ^^^^^^^^^^^^
  |   | 2024-05-24 08:23:38 | result = await result
  |   | 2024-05-24 08:23:38 | File "/opt/conda/envs/default/lib/python3.11/site-packages/tornado/web.py", line 1790, in _execute
  |   | 2024-05-24 08:23:38 | Traceback (most recent call last):
  |   | 2024-05-24 08:23:38 | HTTPServerRequest(protocol='http', host='10.32.2.35:8888', method='GET', uri='/user/kcpevey@quansight.com/test-cf9b8f6/api', version='HTTP/1.1', remote_ip='10.32.3.48')
  |   | 2024-05-24 08:23:38 | [E 240524 08:23:38 web:1875] Uncaught exception GET /user/kcpevey@quansight.com/test-cf9b8f6/api (10.32.3.48)
  |   | 2024-05-24 08:23:38 | [D 240524 08:23:38 auth:1398] Redirecting to login url: /hub/api/oauth2/authorize?client_id=jupyterhub-user-kcpevey%2540quansight.com-test-cf9b8f6&redirect_uri=%2Fuser%2Fkcpevey%40quansight.com%2Ftest-cf9b8f6%2Foauth_callback&response_type=code
  |   | 2024-05-24 08:23:38 | [D 240524 08:23:38 auth:835] No user identified
  |   | 2024-05-24 08:23:38 | [I 240524 08:23:38 proxyhandlers:848] SuperviseAndProxyHandler http_get 34841 api