如何修復 [Errno 111] 連接被拒絕

Question

我正在使用 authlib (0.11) 庫設置 oauth2 服務器。 我已經創建了 Oauth2Session 並收到了授權代碼授權。 現在我必須 fetch_access_token(...)，但我在嘗試與 access_token_url 通信時收到 [Errno 111] 連接被拒絕。 我正在使用 docker compose，並已將兩者與橋連接。 我還使用端口映射從主機訪問本地主機。 （蘋果系統）

我已經在本地主機和特定鏈接上嘗試過 netcat 並發送 GET / HTTP/1.1。 有效。 我已經檢查了端口轉發並將其設置為 true (=1) 我嘗試將主機鏈接的名稱 (127.0.0.1) 設置為 docker compose 名稱（后端）

access_token_url = 'http://127.0.0.1:50000/oauth/token'
# tried 'http://backend:50000/oauth/token', 'http://localhost:50000/oauth/token'
token = sessionOauth.fetch_access_token(access_token_url, authorization_response=authorization_response)

# the part that concerns the question
backend:
    build: .

    ports:
      - "50000:5000"
    environment:
      - AUTHLIB_INSECURE_TRANSPORT=true
      - PYTHONUNBUFFERED=1
    networks:
      - db
      - front_back

vuejs:
    build: ../x/
    ports:
      - 8080:8080
    networks:
      - front_back
networks:
    main:
      driver: bridge
    db:
      driver: bridge
    front_back:
      driver: bridge

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2311, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1834, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1737, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python3.7/site-packages/flask/_compat.py", line 36, in reraise
    raise value
  File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1832, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1818, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/usr/local/lib/python3.7/site-packages/flask_cors/decorator.py", line 128, in wrapped_function
    resp = make_response(f(*args, **kwargs))
  File "/var/app/app/routes.py", line 325, in testing3
    token = sessionOauth.fetch_access_token(access_token_url, authorization_response=authorization_response)
  File "/usr/local/lib/python3.7/site-packages/authlib/client/oauth2_session.py", line 102, in fetch_access_token
    return self.fetch_token(url, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/authlib/oauth2/client.py", line 177, in fetch_token
    headers=headers, **session_kwargs
  File "/usr/local/lib/python3.7/site-packages/authlib/oauth2/client.py", line 185, in _fetch_token
    auth=auth, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/requests/sessions.py", line 581, in post
    return self.request('POST', url, data=data, json=json, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/authlib/client/oauth2_session.py", line 110, in request
    method, url, auth=auth, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/requests/sessions.py", line 533, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/local/lib/python3.7/site-packages/requests/sessions.py", line 646, in send
    r = adapter.send(request, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/requests/adapters.py", line 516, in send
    raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='127.0.0.1', port=50000): Max retries exceeded with url: /oauth/token (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fc872466198>: Failed to establish a new connection: [Errno 111] Connection refused'))

Answer 1

答案是：

使用容器的名稱，在我的情況下為后端，然后使用原始端口而不是暴露的端口，在我的情況下為 5000。

access_token_url = 'http://backend:5000/oauth/token'