ERR_CONNECTION_REFUSED (localhost:3000 only w/ignoreHTTPSErrors)

It’s really hard to debug puppeteer, at least connection errors. Related to #822, I get a ERR_CONNECTION_REFUSED error. Even with DEBUG=*, there’s nothing in the puppeteer logs that shows why the request failed. No stack trace, no weird error, no output from my server, nothing. The only output in Chromium inspector console and puppeteer CLI debug output was ERR_CONNECTION_REFUSED as mentioned.

I also tried the link in Chrome Canary and Chromium on its own, worked OK.

Also, I noticed that I have to manually unset the following header, even though I had set ignoreHTTPSErrors: true; shouldn’t this header get removed if this option is true by default?

page.setExtraHTTPHeaders({ 'upgrade-insecure-requests': '0' });

I think that this is a localhost or a port issue. My server is running at http://localhost:3000 and I have ignoreHTTPSErrors: true option set as mentioned.

I changed the URL I’m navigating to with our production URL and it worked fine.

[amazzoccone]

Hey @niftylettuce how you fixed it? I couldn’t make it work successfully. I look over all the issues, but none of the solutions resolve the problem.

[Iamcerba]

In my case, I forgot that the application is running in VS Code dev container and localhost is not visible from the container. I have to replace “localhost” with “host.docker.internal”.