Struct ToSign 

pub struct ToSign<'a> {
    pub method: &'a str,
    pub path: &'a str,
    pub query: &'a [(String, String)],
    pub headers: &'a [(String, String)],
    pub payload_sha256: &'a str,
}

What a request signs: method, the encoded path, the query pairs (not encoded), headers (lowercase names) and the payload hash.

Fields

method: &'a str

path: &'a str

Already URI-encoded (/bucket/my%20key).

query: &'a [(String, String)]

headers: &'a [(String, String)]

payload_sha256: &'a str