1. percent encoded: o%cc%88 (test_o%cc%88.txt) Expect 200
2. percent encoded: %c3%b6 (test_%c3%b6.txt) Expect 200


3. utf-8 encoded char: o\xcc\x88 (test_ö.txt) Expect 200
4. utf-8 encoded char: \xc3\xb6 (test_ö.txt) Expect 200