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use std::error::Error as StdError;
use std::fmt::{self, Display};
use websocket::message::CloseData;
/// An error that occurred while attempting to deal with the gateway.
///
/// Note that - from a user standpoint - there should be no situation in which
/// you manually handle these.
#[derive(Clone, Debug)]
pub enum Error {
/// There was an error building a URL.
BuildingUrl,
/// The connection closed, potentially uncleanly.
Closed(Option<CloseData>),
/// Expected a Hello during a handshake
ExpectedHello,
/// When there was an error sending a heartbeat.
HeartbeatFailed,
/// Expected a Ready or an InvalidateSession
InvalidHandshake,
/// An indicator that an unknown opcode was received from the gateway.
InvalidOpCode,
/// When a session Id was expected (for resuming), but was not present.
NoSessionId,
/// Failed to reconnect after a number of attempts.
ReconnectFailure,
}
impl Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str(self.description())
}
}
impl StdError for Error {
fn description(&self) -> &str {
match *self {
Error::BuildingUrl => "Error building url",
Error::Closed(_) => "Connection closed",
Error::ExpectedHello => "Expected a Hello",
Error::HeartbeatFailed => "Failed sending a heartbeat",
Error::InvalidHandshake => "Expected a valid Handshake",
Error::InvalidOpCode => "Invalid OpCode",
Error::NoSessionId => "No Session Id present when required",
Error::ReconnectFailure => "Failed to Reconnect",
}
}
}
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