feat: Make the 3rd-party download robust in CI - #2172

Weird that the zlib change is needed. Why did it work fine so far?

Hmm, it was recently (Jun 6 18:11:57 2025, c9d7862) changed to zlib.net, and used to be coming from downloads.sourceforge.net/libpng... Not sure if that's a good source nowadays.

no clue, but each time the Windows VC build failed was because the download of zlib failed. I first added the retry, but after 3 retries it still failed until I changed the download location. The strange thing is that locally I couldn't reproduce it, it downloads the correct file from the zlib.net. But somehow it fails to download it in the CI.

Weird that the zlib change is needed. Why did it work fine so far?

Hmm, it was recently (Jun 6 18:11:57 2025, c9d7862) changed to zlib.net, and used to be coming from downloads.sourceforge.net/libpng... Not sure if that's a good source nowadays.

@grauw do you remember why you changed that link?
EDIT: Oh, I guess the commit message tells us that.... no more releases on the original URL then? Nope..

What is the content of that 12 KB HTML page?

Presumably it will tell you why the desired content was not served?