Function base64_url::unescape_u8_slice

pub fn unescape_u8_slice<S: ?Sized + AsRef<[u8]>>(base64_url: &S) -> Cow<[u8]>

Unescape Base64-URL data to Base64 data. The conversion is not concerning with Base64 decoding. You need to make sure the input Base64-URL data is correct by yourself.