web\Response getDispositionHeaderValue()

Returns Content-Disposition header value that is safe to use with both old and new browsers

Fallback name:

• Causes issues if contains non-ASCII characters with codes less than 32 or more than 126.
• Causes issues if contains urlencoded characters (starting with %) or % character. Some browsers interpret filename="X" as urlencoded name, some don't.
• Causes issues if contains path separator characters such as \ or /.
• Since value is wrapped with ", it should be escaped as \".
• Since input could contain non-ASCII characters, fallback is obtained by transliteration.

UTF name:

• Causes issues if contains path separator characters such as \ or /.
• Should be urlencoded since headers are ASCII-only.
• Could be omitted if it exactly matches fallback name.