[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:720)

[ndee85]

Hi,
I am trying to implement the addon updater into my addon. I have setup all basic steps. I left the repo and user name at defaults by now. Just to see if it gets a connection.

At work we use a proxy to connect to the internet. Could it be related to that?

Unfortunately I get the error message above. And within the blender console I get these errors:

Getting tags from server Exception in thread Thread-3: Traceback (most recent call last): File "C:\Program Files\Blender Foundation\Blender\2.79\python\lib\threading.py ", line 914, in _bootstrap_inner self.run() File "C:\Program Files\Blender Foundation\Blender\2.79\python\lib\threading.py ", line 862, in run self._target(*self._args, **self._kwargs) File "C:\Users\g041481\AppData\Roaming\Blender Foundation\Blender\2.79\scripts \addons\coa_tools\addon_updater.py", line 1309, in async_check_update self.check_for_update(now=now) File "C:\Users\g041481\AppData\Roaming\Blender Foundation\Blender\2.79\scripts \addons\coa_tools\addon_updater.py", line 1035, in check_for_update self.get_tags() # sets self._tags and self._tag_latest File "C:\Users\g041481\AppData\Roaming\Blender Foundation\Blender\2.79\scripts \addons\coa_tools\addon_updater.py", line 523, in get_tags self._prefiltered_tag_count = len(all_tags) TypeError: object of type 'NoneType' has no len()

Later I will check this from home and see if it works. I will report back. Still would be great if this works with a proxy so my colleagues could update the addon without hassle in the future.

[ndee85]

Forgot to mention that the "URL error, check internet connection" exception is thrown.

[ndee85]

Ok.. I think I found a solution. It did have nothing to do with proxy settings. Its a problem with the ssl context. I found a solution on this site:
https://forum.manjaro.org/t/how-to-disable-ssl-verification-for-git-etc-through-proxy/20215

Basicall I just needed to import ssl
and then add the proper context to the openurl functions like that:

context = ssl._create_unverified_context()
urllib.request.urlopen(request,context=context)

Would be cool if this can be added by default.

[TheDuckCow]

Thanks again for looking into this and finding a solution - looking forward to the PR as discussed.

[ndee85]

Hi,
here is the pull request. You may want to take a look and see if its ok.
#36

[TheDuckCow]

Thanks again for the contribution, now merged (and now even used by one of my other addons)!

[Alzy]

Instead of disabling ssl certificate verification and possibly causing security threats, use the certifi module as @john-shine proposed here. This example uses aiohttp but should lead you in the right direction even if you're using a different module.