Thursday, 24 March 2022

How to get more details on a requests.exceptions.SSLError?

When I request a URL with an expired HTTPS certificate I do not get a meaningful error from requests. Instead it gives me a cascade of "ssl.SSLError: A failure in the SSL library occurred".

See this example with https://expired.badssl.com/ :

>python
Python 3.9.5 (tags/v3.9.5:0a7dcbd, May  3 2021, 17:27:52) [MSC v.1928 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import requests
>>> requests.get("https://expired.badssl.com/")
Traceback (most recent call last):
  File "C:\Users\me\apps\Python39\lib\site-packages\urllib3\connectionpool.py", line 670, in urlopen
    httplib_response = self._make_request(
  File "C:\Users\me\apps\Python39\lib\site-packages\urllib3\connectionpool.py", line 381, in _make_request
    self._validate_conn(conn)
  File "C:\Users\me\apps\Python39\lib\site-packages\urllib3\connectionpool.py", line 978, in _validate_conn
    conn.connect()
  File "C:\Users\me\apps\Python39\lib\site-packages\urllib3\connection.py", line 362, in connect
    self.sock = ssl_wrap_socket(
  File "C:\Users\me\apps\Python39\lib\site-packages\urllib3\util\ssl_.py", line 386, in ssl_wrap_socket
    return context.wrap_socket(sock, server_hostname=server_hostname)
  File "C:\Users\me\apps\Python39\lib\ssl.py", line 500, in wrap_socket
    return self.sslsocket_class._create(
  File "C:\Users\me\apps\Python39\lib\ssl.py", line 1040, in _create
    self.do_handshake()
  File "C:\Users\me\apps\Python39\lib\ssl.py", line 1309, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLError: A failure in the SSL library occurred (_ssl.c:1129)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\me\apps\Python39\lib\site-packages\requests\adapters.py", line 439, in send
    resp = conn.urlopen(
  File "C:\Users\me\apps\Python39\lib\site-packages\urllib3\connectionpool.py", line 726, in urlopen
    retries = retries.increment(
  File "C:\Users\me\apps\Python39\lib\site-packages\urllib3\util\retry.py", line 446, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='expired.badssl.com', port=443): Max retries exceeded with url: / (Caused by SSLError(SSLError(1, 'A failure in the SSL library occurred (_ssl.c:1129)')))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\me\apps\Python39\lib\site-packages\requests\api.py", line 76, in get
    return request('get', url, params=params, **kwargs)
  File "C:\Users\me\apps\Python39\lib\site-packages\requests\api.py", line 61, in request
    return session.request(method=method, url=url, **kwargs)
  File "C:\Users\me\apps\Python39\lib\site-packages\requests\sessions.py", line 530, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\Users\me\apps\Python39\lib\site-packages\requests\sessions.py", line 643, in send
    r = adapter.send(request, **kwargs)
  File "C:\Users\me\apps\Python39\lib\site-packages\requests\adapters.py", line 514, in send
    raise SSLError(e, request=request)
requests.exceptions.SSLError: HTTPSConnectionPool(host='expired.badssl.com', port=443): Max retries exceeded with url: / (Caused by SSLError(SSLError(1, 'A failure in the SSL library occurred (_ssl.c:1129)')))
>>>

requests is 2.24.0 and ssl.OPENSSL_VERSION says "OpenSSL 1.1.1h 22 Sep 2020". I can not update the packages.

How can I get a meaningful error or error message that tells me that the certificate is expired?



from How to get more details on a requests.exceptions.SSLError?

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