Enum ErrorKind 

#[non_exhaustive]
pub enum ErrorKind {
    Http(Error),
    Status(Status),
    InvalidAccept,
    AlreadyExecuted,
    ExtendedConnectUnsupported,
}

Available on crate feature websockets only.

The kind of error that occurred when attempting a websocket upgrade

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Http(Error)

an HTTP error attempting to make the request

Status(Status)

Response didn’t have the expected status (101 Switching Protocols for h1, 200 OK for h2/h3 extended CONNECT).

InvalidAccept

Response Sec-WebSocket-Accept was missing or invalid; generally a server bug

AlreadyExecuted

into_websocket was called on a Conn that had already been executed (its status is already set). The websocket upgrade is the execution; build the conn and call into_websocket directly without awaiting first.

ExtendedConnectUnsupported

h2 peer did not advertise SETTINGS_ENABLE_CONNECT_PROTOCOL = 1, so the extended-CONNECT bootstrap (RFC 8441) is not available on this connection.

Also surfaced when the conn was hinted as Version::Http3: client-side WebSocket-over-h3 (RFC 9220) requires h3 DATA-frame wrapping for the post-upgrade byte channel and that framing layer doesn’t exist yet.

Trait Implementations

impl Debug for ErrorKind

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

Formats the value using the given formatter.

impl Display for ErrorKind

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

Formats the value using the given formatter.

impl Error for ErrorKind

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<Error> for ErrorKind

fn from(source: Error) -> Self

Converts to this type from the input type.