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use std::io;
use std::fmt;
use std::str::{Utf8Error};
use httparse;
/// Websocket Error works both for client and server connections
pub struct Error(ErrorEnum);
quick_error! {
/// Websocket error
#[derive(Debug)]
pub enum ErrorEnum {
/// Socket IO error
Io(err: io::Error) {
description("IO error")
display("IO error: {}", err)
from()
}
/// Text frame can't be decoded
InvalidUtf8(err: Utf8Error) {
description("Error decoding text frame")
display("Error decoding text frame: {}", err)
from()
}
/// Got websocket message with wrong opcode
InvalidOpcode(code: u8) {
description("Opcode of the frame is invalid")
display("Opcode of the frame is invalid: {}", code)
from()
}
/// Got unmasked frame
Unmasked {
description("Received unmasked frame")
}
/// Got fragmented frame (fragmented frames are not supported yet)
Fragmented {
description("Received fragmented frame")
}
/// Received frame that is longer than configured limit
TooLong {
description("Received frame that is too long")
}
/// Currently this error means that channel to/from websocket closed
///
/// In future we expect this condition (processor dropping channel) to
/// happen when we forced killing connection by backend, so processor
/// got rid of all object that refer to the connection.
///
/// Another case: we are trying to use RemoteReplier for connection
/// that already closed
Closed {
description("Forced connection close")
}
/// Error parsing http headers
HeaderError(err: httparse::Error) {
description("parse error")
display("parse error: {:?}", err)
from()
}
PrematureResponseHeaders {
description("response headers before request are sent")
}
Custom(err: Box<::std::error::Error + Send + Sync>) {
description("custom error")
cause(&**err)
}
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(&self.0, f)
}
}
impl fmt::Debug for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Debug::fmt(&self.0, f)
}
}
impl From<ErrorEnum> for Error {
fn from(err: ErrorEnum) -> Self {
Error(err)
}
}
impl ::std::error::Error for Error {
fn description(&self) -> &str {
self.0.description()
}
fn cause(&self) -> Option<&::std::error::Error> {
self.0.cause()
}
}
impl Error {
/// Create an error instance wrapping custom error
pub fn custom<E: Into<Box<::std::error::Error + Send + Sync>>>(err: E)
-> Error
{
Error(ErrorEnum::Custom(err.into()))
}
}
#[test]
fn send_sync() {
fn send_sync<T: Send+Sync>(_: T) {}
send_sync(Error::from(ErrorEnum::TooLong));
}