Troubleshooting cors-proxy HTTP 500

[tmeuze]

Hi there,

I am having the hardest time with certain widgets - specifically of self-hosted services - and cors-proxy. In the logs, I'm getting a very generic HTTP 500 error on client-side, and no logs for the container.

Aside the 500 error, I'm hit with endless timeout errors. I feel that might just be a side-effect of the issue.

I am using Traefik. I have CORS middleware set up as such:

      headers:
        accessControlAllowOriginList: 
          - "*"

CORS Proxy is on by default:
widgetsAlwaysUseProxy: true

It should be noted that I'm using an "internal-only" Traefik instance; the FQDN is not publicly addressable. I use a self-signed TLS certificate that clients blindly trust. However, I briefly routed a public FQDN to it, and also tried via direct IP, to no avail. Internet APIs like Weather, News, and Public IP work, while self-hosted service widgets like Healthchecks, Glances, and AdGuard - no matter if through Traefik or direct IP.

Any advice would be greatly appreciated. Thank you.

[Lissy93]

Usually just setting usePoxy: true fixes all issues, see Widget Docs --> Proxying Requests for more info.

If you're still having issues, check the troubleshooting docs, specifically Fixing Widget CORS Errors.