file 1: https://textfiles.meulie.net/survival/tenherbs.txt
file 2: https://textfiles.meulie.net/survival/1hrrads.txt

When trying to open file 1 in a browser, I get prompted to download it. When trying to open file 2, it displays in the browser.

I've checked both with Redbot, and can't see any difference:
file 1: https://redbot.org/?uri=https%3A%2F%2Ftextfiles.meulie.net%2Fsurvival%2Ftenherbs.txt
file 2: https://redbot.org/?uri=https%3A%2F%2Ftextfiles.meulie.net%2Fsurvival%2F1hrrads.txt

No special config in the site-config either. What can explain this difference in treatment?

Regards,
Evert

Enable debug and see what nginx is selecting as context type which should also tell why.

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nginx for Windows http://nginx-win.ecsds.eu/

Thank you for your swift reply.

Redbot says content-type for both URL's is: 'Content-Type: text/plain; charset=UTF-8'. Will nginx in debug mode reveal me more/different info? If so, I'll try it later today :)

regards,
Evert

Debug mode will show everything, just do a simple Curl test to keep the logfile small.

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nginx for Windows http://nginx-win.ecsds.eu/