New answers tagged uploading
I could not find an extension either, but Wikimedia Commons uses an upload form similar to what you describe. You can see it at Special:Upload if you have an account (see the screenshot below if you don't). That uses UploadForm.js, which is most likely far too complex for your purpose, although you may wish to adapt it. A simpler way to do that is to do ...
Here is the MediaWiki documentation for mime type detection. It says that you need to add modify two files: mime.types Add conf to the text/plain line mime.info Ensure that text/plain is on the line ending in [TEXT]
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