FetchError: request to https://example.com/check failed, reason: certificate has expired

[holtwick]

I run a custom instance of LanguageTool on Docker. It used to work fine. But now I get these errors from the plugin:

language: auto
motherTongue: de-DE
preferredVariants: en-US,de-DE
Error connecting to https://z-languagetool.holtwick.de/v2/check
FetchError: request to https://z-languagetool.holtwick.de/v2/check failed, reason: certificate has expired

The SSL certificate is up-to-date. Is there something I can do to fix this?

[davidlday]

So I did a little digging and came across this issue on node-fetch that might provide some insight: node-fetch/node-fetch#568

Looks like it might be an electron issue. I'm leaving this open for now and will try to do a little more digging over the weekend, but ultimately I don't think it's an issue with this extension specifically.

[holtwick]

Thanks! Maybe it is worth updating node-fetch? It is on 3.0 now. https://www.npmjs.com/package/node-fetch

[davidlday]

Oh definitely. Dependabot already opened PR #328 for updating, but I have to make some significant changes to use it since it's changed to an ESM only package. I'm working through it, but it's slow going due to other life priorities.

[holtwick]

The node-fetch people seem to also maintain the 2.x branch as well. Bumping to 2.6.5 might also solve the issue without larger rework? https://www.npmjs.com/package/node-fetch/v/2.6.5

[davidlday]

Updated to node-fetch 2.6.6. Still leaving the issue open for awareness.

[cernst72]

This is still happening in version 0.19.0:
The certificate is perfectly valid and working with other clients, but the extension's output says:
Error connecting to https://xx.yy.zz/v2/check
FetchError: request to https://xx.yy.zz/v2/check failed, reason: certificate has expired

[cernst72]

This is still happening in version 0.19.0: The certificate is perfectly valid and working with other clients, but the extension's output says: Error connecting to https://xx.yy.zz/v2/check FetchError: request to https://xx.yy.zz/v2/check failed, reason: certificate has expired

This is probably not related to vscode-languagetool-linter, but a general problem concerning letsencrypt certificates in vscode, as discussed here.
Setting "http.systemCertificates": false in settings.json works for me. So, not an issue.