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use std::borrow::Cow;
use std::error::Error as StdError;
use std::fmt::{self, Display};
use std::io;
use std::string::FromUtf8Error;
use hyper;
pub type Result<T> = ::std::result::Result<T, Error>;
pub enum Error {
NoRequestContentType,
General(String),
Io(io::Error),
Hyper(hyper::Error),
Utf8(FromUtf8Error),
Decoding(Cow<'static, str>),
Http(http::Error),
SerdeJson(serde_json::error::Error),
}
impl From<io::Error> for Error {
fn from(err: io::Error) -> Error {
Error::Io(err)
}
}
impl From<hyper::Error> for Error {
fn from(err: hyper::Error) -> Error {
Error::Hyper(err)
}
}
impl From<FromUtf8Error> for Error {
fn from(err: FromUtf8Error) -> Error {
Error::Utf8(err)
}
}
impl From<http::Error> for Error {
fn from(err: http::Error) -> Error {
Error::Http(err)
}
}
impl From<serde_json::error::Error> for Error {
fn from(err: serde_json::error::Error) -> Error {
Error::SerdeJson(err)
}
}
impl Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Error::General(ref e) =>
format!("{}: {}", self.description(), e).fmt(f),
Error::Io(ref e) =>
format!("{}: {}", self.description(), e).fmt(f),
Error::Hyper(ref e) =>
format!("{}: {}", self.description(), e).fmt(f),
Error::Utf8(ref e) =>
format!("{}: {}", self.description(), e).fmt(f),
Error::Decoding(ref e) =>
format!("{}: {}", self.description(), e).fmt(f),
Error::Http(ref e) =>
format!("{}: {}", self.description(), e).fmt(f),
Error::SerdeJson(ref e) =>
format!("{}: {}", self.description(), e).fmt(f),
_ => self.description().to_string().fmt(f),
}
}
}
impl fmt::Debug for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str(&*self.description()).ok();
if self.source().is_some() {
write!(f, ": {:?}", self.source().unwrap()).ok();
}
Ok(())
}
}
impl StdError for Error {
fn description(&self) -> &str{
match *self {
Error::NoRequestContentType => "The Hyper request did not have a Content-Type header.",
Error::General(ref msg) => &msg,
Error::Io(_) => "An I/O error occurred.",
Error::Hyper(_) => "A Hyper error occurred.",
Error::Utf8(_) => "A UTF-8 error occurred.",
Error::Decoding(_) => "A decoding error occurred.",
Error::Http(_) => "A http error occurred.",
Error::SerdeJson(_) => "A serde json error occurred.",
}
}
}