File Upload - Allow extended character sets
I believe the filename issue blocking us from using extended character sets is due to adding the https://github.com/edx/edx-ora2/pull/1538/files#diff-3cff5588a8662d1777be9f26d10550a66928eb7206267c0daad61bc23cfff0e8R39. Doing some digging, it looks like HTTP headers don't support non-ASCII characters, but have a way of encoding for other character sets.
Suggested fix, comes from this stackoverflow thread, plus some digging into the related RFCs. Encode and change filename header format from:
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User Impact Summary
Merged as a quick-fix in