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python - 有效的工作域给出“socket.gaierror: [Errno -2] Name or service not known”

问题描述

我正在开发一个需要实施 SSO 的项目。我的 SSO OAuth2 凭据大致如下：

SECRET = 'abcdefghijklmn12345678'
ACCESS_TOKEN_URL = "https://myprovider.example.com/as/token.oauth2"
USER_API_URL = "https://myprovider.example.com/idp/userinfo.openid"
JWKS_URL = "https://myprovider.example.com/pf/JWKS"
REDIRECT_URI = "http://localhost/api/1/auth/ping"
AUTH_ENDPOINT = "https://myprovider.example.com/as/authorization.oauth2"

我正在使用的库已经过测试并且应该可以工作，但由于某种原因失败了：

[2018-09-13 14:09:29,796] ERROR in app: Exception on /api/1/auth/ping [POST]
Traceback (most recent call last):
  File "/www/lemur/lib/python3.6/site-packages/urllib3/connection.py", line 171, in _new_conn
    (self._dns_host, self.port), self.timeout, **extra_kw)
  File "/www/lemur/lib/python3.6/site-packages/urllib3/util/connection.py", line 59, in create_connection
    for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
  File "/usr/lib/python3.6/socket.py", line 745, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -2] Name or service not known

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/www/lemur/lib/python3.6/site-packages/urllib3/connectionpool.py", line 600, in urlopen
    chunked=chunked)
  File "/www/lemur/lib/python3.6/site-packages/urllib3/connectionpool.py", line 343, in _make_request
    self._validate_conn(conn)
  File "/www/lemur/lib/python3.6/site-packages/urllib3/connectionpool.py", line 849, in _validate_conn
    conn.connect()
  File "/www/lemur/lib/python3.6/site-packages/urllib3/connection.py", line 314, in connect
    conn = self._new_conn()
  File "/www/lemur/lib/python3.6/site-packages/urllib3/connection.py", line 180, in _new_conn
    self, "Failed to establish a new connection: %s" % e)
urllib3.exceptions.NewConnectionError: <urllib3.connection.VerifiedHTTPSConnection object at 0x7fc15ed415f8>: Failed to establish a new connection: [Errno -2] Name or service not known

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/www/lemur/lib/python3.6/site-packages/requests/adapters.py", line 445, in send
    timeout=timeout
  File "/www/lemur/lib/python3.6/site-packages/urllib3/connectionpool.py", line 638, in urlopen
    _stacktrace=sys.exc_info()[2])
  File "/www/lemur/lib/python3.6/site-packages/urllib3/util/retry.py", line 398, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='myprovider.example.com', port=443): Max retries exceeded with url: /as/token.oauth2?grant_type=authorization_code&scope=openid+email+profile&code=abcdef123-ghijklm456&redirect_uri=http%3A%2F%2Flocalhost%2Fapi%2F1%2Fauth%2Fping&client_id=lemur (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7fc15ed415f8>: Failed to establish a new connection: [Errno -2] Name or service not known',))

经过一番调试，我发现异常源于r = requests.post(access_token_url, headers=headers, params=params, verify=verify_cert)SSO 库内部。

我打印出 的值access_token_url，即https://myprovider.example.com/as/token.oauth2。

一些谷歌搜索告诉我，这socket.gaierror: [Errno -2] Name or service not known可能源于它期待一个主机名而不是一个 URL，即只是myprovider.example.com/as/token.oauth2（没有https://）。主机名myprovider.example.com/as/token.oauth2不会去任何地方，在浏览器上访问它会返回“无法接收响应”消息。然而，参观https://myprovider.example.com/as/token.oauth2工作还不错。

我的提供商需要https://在前面（例如https://myprovider.example.com/as/token.oauth2），否则我会收到来自浏览器的“无法接收响应”消息。即使附加端口 443 asmyprovider.example.com:443/as/token.oauth2也不起作用。http://myprovider.example.com也不会重定向到https，并返回“无法接收响应”消息。

解析https://soaccess_token_url = 'myprovider.example.com/as/token.oauth2'也失败了。

是否需要使用https://（或者更可能是无法使用）是问题所在吗？

谢谢！

标签： pythonsocketsoauth-2.0python-requestsurllib

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