Struct Challenge 

pub struct Challenge {
    pub scheme: String,
    pub token68: Option<String>,
    pub params: Vec<(String, String)>,
}

One parsed challenge from a WWW-Authenticate (or Proxy-Authenticate) field value, per RFC 9110 §11.3:

challenge = auth-scheme [ 1*SP ( token68 / #auth-param ) ]

A challenge is an authentication-scheme name optionally followed by EITHER a single token68 blob (the base64-ish form used by schemes like Negotiate / NTLM) OR a comma-separated list of auth-param name/value pairs (the form used by Basic / Digest, e.g. realm="…"). The two argument shapes are mutually exclusive within one challenge, so token68 and params are never both populated.

Fields

scheme: String

auth-scheme (§11.1) — “a case-insensitive token to identify the authentication scheme”, lowercased here so Basic / basic compare equal.

token68: Option<String>

The token68 form (§11.2) when the scheme carried a single base64/base32/base16-style blob instead of auth-params. None when the challenge had no argument or carried auth-params.

params: Vec<(String, String)>

auth-param list (§11.2) as (lowercased-name, decoded-value) pairs in wire order. Names are matched case-insensitively (§11.2); values are read through the §5.6.4 quoted-string unwrap when DQUOTE-wrapped and kept verbatim when in token form (value case-sensitivity is scheme-specific, so the value case is not folded). Empty when the challenge had no argument or carried a token68.

Trait Implementations

impl Clone for Challenge

fn clone(&self) -> Challenge

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Challenge

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Challenge

fn default() -> Challenge

Returns the “default value” for a type.

impl Eq for Challenge

impl PartialEq for Challenge

fn eq(&self, other: &Challenge) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Challenge