You are building a simple IPTV proxy. You need to dynamically convert user-submitted text lists into valid M3U playlists. An API-based online converter (or local script inspired by one) is the perfect solution.
Ensure your .txt file is formatted correctly. A common format is: #EXTINF:-1,Channel Name http://url-to-stream.m3u8 Txt To M3u Online Converter
http://example.com/radio.mp3,My Radio Station http://example.com/tv.m3u8,Channel 1 You are building a simple IPTV proxy