Exception handling required when REST call hits untrusted SSL certificate

[limweichiang]

As in title, current unhandled exception looks like this if the "--insecure" or "-i" option is not used.

arubaos-tools % python3 cluster-healthcheck.py -m 192.168.1.30 -u USER
Password for USER: 
Traceback (most recent call last):
  File "/Library/Python/3.7/site-packages/urllib3/connectionpool.py", line 672, in urlopen
    chunked=chunked,
  File "/Library/Python/3.7/site-packages/urllib3/connectionpool.py", line 376, in _make_request
    self._validate_conn(conn)
  File "/Library/Python/3.7/site-packages/urllib3/connectionpool.py", line 994, in _validate_conn
    conn.connect()
  File "/Library/Python/3.7/site-packages/urllib3/connection.py", line 394, in connect
    ssl_context=context,
  File "/Library/Python/3.7/site-packages/urllib3/util/ssl_.py", line 383, in ssl_wrap_socket
    return context.wrap_socket(sock)
  File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/ssl.py", line 412, in wrap_socket
    session=session
  File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/ssl.py", line 853, in _create
    self.do_handshake()
  File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/ssl.py", line 1117, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Library/Python/3.7/site-packages/requests/adapters.py", line 449, in send
    timeout=timeout
  File "/Library/Python/3.7/site-packages/urllib3/connectionpool.py", line 720, in urlopen
    method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
  File "/Library/Python/3.7/site-packages/urllib3/util/retry.py", line 436, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='192.168.1.30', port=4343): Max retries exceeded with url: /v1/api/login?username=USER&password=PASSWORDSTR (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)')))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "cluster-healthcheck.py", line 209, in <module>
    mm_login_response = http_session.get(mm_login_url, params={'username': mm_user, 'password': mm_passwd})
  File "/Library/Python/3.7/site-packages/requests/sessions.py", line 546, in get
    return self.request('GET', url, **kwargs)
  File "/Library/Python/3.7/site-packages/requests/sessions.py", line 533, in request
    resp = self.send(prep, **send_kwargs)
  File "/Library/Python/3.7/site-packages/requests/sessions.py", line 646, in send
    r = adapter.send(request, **kwargs)
  File "/Library/Python/3.7/site-packages/requests/adapters.py", line 514, in send
    raise SSLError(e, request=request)
requests.exceptions.SSLError: HTTPSConnectionPool(host='192.168.1.30', port=4343): Max retries exceeded with url: /v1/api/login?username=USER&password=PASSWORDSTR (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)')))