Websocket connection failure for realtime data

[elijah286]

I can connect and see historical data, but invoking update_realtime() returns this error: ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1045)

[kbickar]

Looks like you need certificates installed, this thread has some suggestions: https://stackoverflow.com/questions/50236117/scraping-ssl-certificate-verify-failed-error-for-http-en-wikipedia-org

[howartp84]

I had this last night.

MacOS Sierra uses OpenSSL 0.9.8 which is deprecated and doesn't support TLS 1.1 or TLS 1.2.

High Sierra and later uses LibreSSL, which fixed the problem when I upgraded OS.

[clarsen]

seen on Raspberry PI with Python 3.7.3:

  File "poll.py", line 24, in <module>
    sense.update_realtime()
  File "/home/pi/.local/share/virtualenvs/home-energy-monitor-ttUzj-Xz/lib/python3.7/site-packages/sense_energy/senseable.py", line 43, in update_realtime
    next(self.get_realtime_stream())
  File "/home/pi/.local/share/virtualenvs/home-energy-monitor-ttUzj-Xz/lib/python3.7/site-packages/sense_energy/senseable.py", line 51, in get_realtime_stream
    ws = create_connection(url, timeout=self.wss_timeout)
  File "/home/pi/.local/share/virtualenvs/home-energy-monitor-ttUzj-Xz/lib/python3.7/site-packages/websocket/_core.py", line 514, in create_connection
    websock.connect(url, **options)
  File "/home/pi/.local/share/virtualenvs/home-energy-monitor-ttUzj-Xz/lib/python3.7/site-packages/websocket/_core.py", line 223, in connect
    options.pop('socket', None))
  File "/home/pi/.local/share/virtualenvs/home-energy-monitor-ttUzj-Xz/lib/python3.7/site-packages/websocket/_http.py", line 126, in connect
    sock = _ssl_socket(sock, options.sslopt, hostname)
  File "/home/pi/.local/share/virtualenvs/home-energy-monitor-ttUzj-Xz/lib/python3.7/site-packages/websocket/_http.py", line 260, in _ssl_socket
    sock = _wrap_sni_socket(sock, sslopt, hostname, check_hostname)
  File "/home/pi/.local/share/virtualenvs/home-energy-monitor-ttUzj-Xz/lib/python3.7/site-packages/websocket/_http.py", line 239, in _wrap_sni_socket
    server_hostname=hostname,
  File "/usr/lib/python3.7/ssl.py", line 412, in wrap_socket
    session=session
  File "/usr/lib/python3.7/ssl.py", line 853, in _create
    self.do_handshake()
  File "/usr/lib/python3.7/ssl.py", line 1117, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLError: [SSL: WRONG_SIGNATURE_TYPE] wrong signature type (_ssl.c:1056)

[clarsen]

referring to this 'fix': https://github.com/kennethreitz/requests/issues/4775#issuecomment-478198879

and ability to set this within the websocket connection code:
https://github.com/websocket-client/websocket-client/blob/1c2219b8a580182db63e9ae1ed3cc1d58f25845b/websocket/_http.py#L227

In sense_energy/senseable.py:

-            ws = create_connection(url, timeout=self.wss_timeout)
+            ws = create_connection(url, timeout=self.wss_timeout, sslopt={'ciphers': 'DEFAULT@SECLEVEL=1'})

Setting 'ciphers' for sslopt 'fixes' it, but I'd be cautious about patching this in anything more than a non-production use.