How to encode UTF8 filename for HTTP headers? (Python, Django)

Question

I have problem with HTTP headers, they're encoded in ASCII and I want to provided a view for downloading files that names can be non ASCII.

response['Content-Disposition'] = 'attachment; filename="%s"' % (vo.filename.encode("ASCII","replace"), )

I don't want to use static files serving for same issue with non ASCII file names but in this case there would be a problem with File system and it's file name encoding. (I don't know target os.)

I've already tried urllib.quote(), but it raises KeyError exception.

Possibly I'm doing something wrong but maybe it's impossible.

Answer 1

This is a FAQ.

There is no interoperable way to do this. Some browsers implement proprietary extensions (IE, Chrome), other implement RFC 2231 (Firefox, Opera).

See test cases at http://greenbytes.de/tech/tc2231/.

Update: as of November 2012, all current desktop browsers support the encoding defined in RFC 6266 and RFC 5987 (Safari >= 6, IE >= 9, Chrome, Firefox, Opera, Konqueror).