Enum TokenError 

pub enum TokenError {
    Missing,
    Malformed,
    Invalid,
    Expired,
    Unavailable(Error),
}

Why a presented token was not accepted.

An unknown id and a wrong secret are the same variant on purpose. They are indistinguishable to the caller, and keeping them apart in the type is how somebody eventually writes a message — or a log line, or a metric — that tells an attacker which of their guesses was half right.

Variants

Missing

No Authorization: Bearer header at all.

Malformed

Present, but not shaped like <id>|<secret>.

Invalid

No such token, or the wrong secret for it.

Expired

The right secret for a token that is past its expiry.

Unavailable(Error)

The store itself failed. Ours, not the caller’s.

Implementations

impl TokenError

pub fn message(&self) -> &'static str

What the client is told. Never mentions the token it presented.

pub fn status(&self) -> Status

pub fn challenge(&self) -> &'static str

The WWW-Authenticate challenge, per RFC 6750.

A bare Bearer when nothing was presented — the client may simply not know it needed to authenticate — and error="invalid_token" when something was, which tells a correct client to stop retrying with the credential it has and go get another one.

Trait Implementations

impl Debug for TokenError

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

Formats the value using the given formatter.

impl Display for TokenError

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

Formats the value using the given formatter.

impl Error for TokenError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl IntoResponse for TokenError

fn into_response(self) -> Response