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use bytes::Bytes;
/// A `WebSocket` message, which can be a text string or binary data.
#[derive(Clone, Debug)]
pub enum Message {
/// A text `WebSocket` message.
// note: we can't use `tungstenite::Utf8String` here, since we don't have tungstenite on wasm.
Text(String),
/// A binary `WebSocket` message.
Binary(Bytes),
/// A ping message with the specified payload.
///
/// The payload here must have a length less than 125 bytes.
///
/// # WASM
///
/// This variant is ignored for WASM targets.
#[cfg_attr(
target_arch = "wasm32",
deprecated(note = "This variant is ignored for WASM targets")
)]
Ping(Bytes),
/// A pong message with the specified payload.
///
/// The payload here must have a length less than 125 bytes.
///
/// # WASM
///
/// This variant is ignored for WASM targets.
#[cfg_attr(
target_arch = "wasm32",
deprecated(note = "This variant is ignored for WASM targets")
)]
Pong(Bytes),
/// A close message.
///
/// Sending this will not close the connection. Use [`WebSocket::close`] for this.
/// Though the remote peer will likely close the connection after receiving this.
///
/// [`WebSocket::close`]: crate::WebSocket::close
Close { code: CloseCode, reason: String },
}
impl From<String> for Message {
#[inline]
fn from(value: String) -> Self {
Self::Text(value)
}
}
impl From<&str> for Message {
#[inline]
fn from(value: &str) -> Self {
Self::from(value.to_owned())
}
}
impl From<Bytes> for Message {
#[inline]
fn from(value: Bytes) -> Self {
Self::Binary(value)
}
}
impl From<Vec<u8>> for Message {
#[inline]
fn from(value: Vec<u8>) -> Self {
Self::from(Bytes::from(value))
}
}
impl From<&[u8]> for Message {
#[inline]
fn from(value: &[u8]) -> Self {
Self::from(Bytes::copy_from_slice(value))
}
}
/// Status code used to indicate why an endpoint is closing the `WebSocket`
/// connection.[1]
///
/// [1]: https://datatracker.ietf.org/doc/html/rfc6455
#[derive(Debug, Default, Eq, PartialEq, Clone, Copy)]
#[non_exhaustive]
pub enum CloseCode {
/// Indicates a normal closure, meaning that the purpose for
/// which the connection was established has been fulfilled.
#[default]
Normal,
/// Indicates that an endpoint is "going away", such as a server
/// going down or a browser having navigated away from a page.
Away,
/// Indicates that an endpoint is terminating the connection due
/// to a protocol error.
Protocol,
/// Indicates that an endpoint is terminating the connection
/// because it has received a type of data it cannot accept (e.g., an
/// endpoint that understands only text data MAY send this if it
/// receives a binary message).
Unsupported,
/// Indicates that no status code was included in a closing frame. This
/// close code makes it possible to use a single method, `on_close` to
/// handle even cases where no close code was provided.
Status,
/// Indicates an abnormal closure. If the abnormal closure was due to an
/// error, this close code will not be used. Instead, the `on_error` method
/// of the handler will be called with the error. However, if the connection
/// is simply dropped, without an error, this close code will be sent to the
/// handler.
Abnormal,
/// Indicates that an endpoint is terminating the connection
/// because it has received data within a message that was not
/// consistent with the type of the message (e.g., non-UTF-8 \[RFC3629\]
/// data within a text message).
Invalid,
/// Indicates that an endpoint is terminating the connection
/// because it has received a message that violates its policy. This
/// is a generic status code that can be returned when there is no
/// other more suitable status code (e.g., Unsupported or Size) or if there
/// is a need to hide specific details about the policy.
Policy,
/// Indicates that an endpoint is terminating the connection
/// because it has received a message that is too big for it to
/// process.
Size,
/// Indicates that an endpoint (client) is terminating the
/// connection because it has expected the server to negotiate one or
/// more extension, but the server didn't return them in the response
/// message of the `WebSocket` handshake. The list of extensions that
/// are needed should be given as the reason for closing.
/// Note that this status code is not used by the server, because it
/// can fail the `WebSocket` handshake instead.
Extension,
/// Indicates that a server is terminating the connection because
/// it encountered an unexpected condition that prevented it from
/// fulfilling the request.
Error,
/// Indicates that the server is restarting. A client may choose to
/// reconnect, and if it does, it should use a randomized delay of 5-30
/// seconds between attempts.
Restart,
/// Indicates that the server is overloaded and the client should either
/// connect to a different IP (when multiple targets exist), or
/// reconnect to the same IP when a user has performed an action.
Again,
/// Indicates that the connection was closed due to a failure to perform a
/// TLS handshake (e.g., the server certificate can't be verified). This
/// is a reserved value and MUST NOT be set as a status code in a Close
/// control frame by an endpoint.
Tls,
/// Reserved status codes.
Reserved(u16),
/// Reserved for use by libraries, frameworks, and applications. These
/// status codes are registered directly with IANA. The interpretation of
/// these codes is undefined by the `WebSocket` protocol.
Iana(u16),
/// Reserved for private use. These can't be registered and can be used by
/// prior agreements between `WebSocket` applications. The interpretation of
/// these codes is undefined by the `WebSocket` protocol.
Library(u16),
/// Unused / invalid status codes.
Bad(u16),
}
impl CloseCode {
/// Check if this `CloseCode` is allowed.
#[must_use]
pub const fn is_allowed(self) -> bool {
!matches!(
self,
Self::Bad(_) | Self::Reserved(_) | Self::Status | Self::Abnormal | Self::Tls
)
}
}
impl std::fmt::Display for CloseCode {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
let code: u16 = (*self).into();
write!(f, "{code}")
}
}
impl From<CloseCode> for u16 {
fn from(code: CloseCode) -> Self {
match code {
CloseCode::Normal => 1000,
CloseCode::Away => 1001,
CloseCode::Protocol => 1002,
CloseCode::Unsupported => 1003,
CloseCode::Status => 1005,
CloseCode::Abnormal => 1006,
CloseCode::Invalid => 1007,
CloseCode::Policy => 1008,
CloseCode::Size => 1009,
CloseCode::Extension => 1010,
CloseCode::Error => 1011,
CloseCode::Restart => 1012,
CloseCode::Again => 1013,
CloseCode::Tls => 1015,
CloseCode::Reserved(code)
| CloseCode::Iana(code)
| CloseCode::Library(code)
| CloseCode::Bad(code) => code,
}
}
}
impl From<u16> for CloseCode {
fn from(code: u16) -> Self {
match code {
1000 => Self::Normal,
1001 => Self::Away,
1002 => Self::Protocol,
1003 => Self::Unsupported,
1005 => Self::Status,
1006 => Self::Abnormal,
1007 => Self::Invalid,
1008 => Self::Policy,
1009 => Self::Size,
1010 => Self::Extension,
1011 => Self::Error,
1012 => Self::Restart,
1013 => Self::Again,
1015 => Self::Tls,
1016..=2999 => Self::Reserved(code),
3000..=3999 => Self::Iana(code),
4000..=4999 => Self::Library(code),
_ => Self::Bad(code),
}
}
}