SSL Problem with Installing `ngrok` through `pyngrok`

Question

from pyngrok import ngrok
public_url = ngrok.connect(5000).public_url

I've taken this 2 lines of code from the twilio's documentation for automating ngrok connection. Basically I'm just trying to establish a connection and take the web url to be then used as a webhook. but my logs keeps giving me this error:

Downloading ngrok ...
Traceback (most recent call last):
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\urllib\request.py", line 1346, in do_open
    h.request(req.get_method(), req.selector, req.data, headers,
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\http\client.py", line 1279, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\http\client.py", line 1325, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\http\client.py", line 1274, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\http\client.py", line 1034, in _send_output
    self.send(msg)
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\http\client.py", line 974, in send
    self.connect()
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\http\client.py", line 1448, in connect
    self.sock = self._context.wrap_socket(self.sock,
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\ssl.py", line 500, in wrap_socket
    return self.sslsocket_class._create(
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\ssl.py", line 1040, in _create
    self.do_handshake()
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\ssl.py", line 1309, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate has expired (_ssl.c:1129)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\Vic\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\pyngrok\installer.py", line 94, in install_ngrok
    download_path = _download_file(url, **kwargs)
  File "C:\Users\Vic\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\pyngrok\installer.py", line 215, in _download_file
    response = urlopen(url, **kwargs)
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\urllib\request.py", line 214, in urlopen
    return opener.open(url, data, timeout)
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\urllib\request.py", line 517, in open
    response = self._open(req, data)
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\urllib\request.py", line 534, in _open
    result = self._call_chain(self.handle_open, protocol, protocol +
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\urllib\request.py", line 494, in _call_chain
    result = func(*args)
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\urllib\request.py", line 1389, in https_open
    return self.do_open(http.client.HTTPSConnection, req,
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2032.0_x64__qbz5n2kfra8p0\lib\urllib\request.py", line 1349, in do_open
    raise URLError(err)
urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate has expired (_ssl.c:1129)>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "d:\Files\School\Linkdemic\Linkdemic\try.py", line 3, in <module>
    phttp_tunnel = ngrok.connect()
  File "C:\Users\Vic\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\pyngrok\ngrok.py", line 251, in connect
    api_url = get_ngrok_process(pyngrok_config).api_url
  File "C:\Users\Vic\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\pyngrok\ngrok.py", line 160, in get_ngrok_process
    install_ngrok(pyngrok_config)
  File "C:\Users\Vic\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\pyngrok\ngrok.py", line 98, in install_ngrok
    installer.install_ngrok(pyngrok_config.ngrok_path)
  File "C:\Users\Vic\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\pyngrok\installer.py", line 98, in install_ngrok
    raise PyngrokNgrokInstallError("An error occurred while downloading ngrok from {}: {}".format(url, e))
pyngrok.exception.PyngrokNgrokInstallError: An error occurred while downloading ngrok from https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-windows-amd64.zip: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate has expired (_ssl.c:1129)>

It works on my colleague's computer but not on mine. I'm not sure what the error is

Answer 1

This can present itself in Python when you're behind certain proxies or VPNs. However, you can easily workaround this, because install_ngrok() takes kwargs that are passed down to urlopen, as documented here.

There are a myriad of ways to resolve this, since it's not specific to any one Python package, but if bypassing SSL verification is an acceptable security risk to your application, here's one example for doing this in pyngrok (also highlighted in this issue):

import ssl
from pyngrok import ngrok, conf, installer

pyngrok_config = conf.get_default()

if not os.path.exists(pyngrok_config.ngrok_path):
    myssl = ssl.create_default_context();
    myssl.check_hostname=False
    myssl.verify_mode=ssl.CERT_NONE
    installer.install_ngrok(pyngrok_config.ngrok_path, context=context)

public_url = ngrok.connect(5000).public_url

Answer 2

You Should change:installer.install_ngrok(pyngrok_config.ngrok_path, context=context) as installer.install_ngrok(pyngrok_config.ngrok_path, context=myssl)

Answer 3

I was on mac and got the same issue. These below steps worked for me.

Install or Update SSL Certificate.

/Applications/Python\ [version]/Install\ Certificates.command

Replace [version] with your version of Python (e.g. 3.11)

/Applications/Python\ 3.11/Install\ Certificates.command

Next, sign up with your ngrok account ngrok's signup page. Get the auth token ngrok dashboard. And Install it

./ngrok authtoken [your-authtoken]

Try running your program again. Hope it works.