Function decode_header

src/decoding.rs:318–323

Decode a JWT without any signature verification/validations and return its [Header](struct.Header.html). If the token has an invalid format (ie 3 parts separated by a `.`), it will return an error. ```rust use jsonwebtoken::decode_header; let token = "a.jwt.token".to_string(); let header = decode_header(&token); ```

(token: impl AsRef<[u8]>)

/// let header = decode_header(&token);
/// ```
pub fn decode_header(token: impl AsRef<[u8]>) -> Result<Header> {
    let token = token.as_ref();
    let (_, message) = expect_two!(token.rsplitn(2, |b| *b == b'.'));
    let (_, header) = expect_two!(message.rsplitn(2, |b| *b == b'.'));
    Header::from_encoded(header)
}

pub(crate) fn verify_signature_body(
    message: &[u8],