Enum Error 

pub enum Error {
    Protocol(Error),
    InvalidStatusCodeWithDetails {
        status: StatusCode,
        body: String,
        headers: HeaderMap,
    },
    InvalidHeaderValue(InvalidHeaderValue),
    NoHeaders,
    StreamEnded,
    InvalidContentType(HeaderValue),
    Instance(Box<dyn Error + Send + Sync + 'static>),
}

Variants

Protocol(Error)

InvalidStatusCodeWithDetails

Failed HTTP response preserving its status, body, and headers. Transport failures without a response use Self::Instance or a protocol variant.

Fields

status: StatusCode

The non-success status.

body: String

The raw response body.

headers: HeaderMap

The failed response’s headers, verbatim.

InvalidHeaderValue(InvalidHeaderValue)

NoHeaders

StreamEnded

InvalidContentType(HeaderValue)

Instance(Box<dyn Error + Send + Sync + 'static>)

Available on non-target_family=wasm only.

Implementations

impl Error

pub fn non_success_status(&self) -> Option<StatusCode>

Preserved HTTP failure status, or None for other error variants.

pub fn non_success_body(&self) -> Option<&str>

The response body this error preserved, when it has one. Companion to Self::non_success_status and Self::non_success_headers.

pub fn non_success_with_details( status: StatusCode, headers: HeaderMap, body: String, ) -> Self

Constructs a failure from its HTTP status, headers, and body without validating that the status is non-successful.

pub fn non_success_headers(&self) -> Option<&HeaderMap>

Returns the failed response’s headers, when this error preserved them.

The following example reads the seconds form of Retry-After:

fn retry_after(error: &Error) -> Option<Duration> {
    let seconds = error
        .non_success_headers()?
        .get(http::header::RETRY_AFTER)?
        .to_str()
        .ok()?
        .parse()
        .ok()?;
    Some(Duration::from_secs(seconds))
}

Returns None for a response-less failure: every non-success error carries its headers.

impl Error

pub fn instance<E: Error + Send + Sync + 'static>(error: E) -> Self

Available on non-target_family=wasm only.

Wrap a transport’s native error as Error::Instance. Transports use this for response-less failures (connect, decode, timeout); non-success responses go through Error::non_success_with_details instead so the status stays inspectable.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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 From<Box<dyn Error + Sync + Send>> for Error

fn from(source: Box<dyn Error + Send + Sync + 'static>) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<InvalidHeaderValue> for Error

fn from(source: InvalidHeaderValue) -> Self

Converts to this type from the input type.