use err_derive::Error;
use hyper::StatusCode;
use hyper::{Body, Response};
use garage_util::error::Error as GarageError;
#[derive(Debug, Error)]
pub enum Error {
// Category: internal error
#[error(display = "Internal error: {}", _0)]
InternalError(#[error(source)] GarageError),
#[error(display = "Internal error (Hyper error): {}", _0)]
Hyper(#[error(source)] hyper::Error),
#[error(display = "Internal error (HTTP error): {}", _0)]
HTTP(#[error(source)] http::Error),
// Category: cannot process
#[error(display = "Forbidden: {}", _0)]
Forbidden(String),
#[error(display = "Not found")]
NotFound,
// Category: bad request
#[error(display = "Invalid UTF-8: {}", _0)]
InvalidUTF8(#[error(source)] std::str::Utf8Error),
#[error(display = "Invalid XML: {}", _0)]
InvalidXML(#[error(source)] roxmltree::Error),
#[error(display = "Invalid header value: {}", _0)]
InvalidHeader(#[error(source)] hyper::header::ToStrError),
#[error(display = "Invalid HTTP range: {:?}", _0)]
InvalidRange(#[error(from)] http_range::HttpRangeParseError),
#[error(display = "Bad request: {}", _0)]
BadRequest(String),
}
impl Error {
pub fn http_status_code(&self) -> StatusCode {
match self {
Error::NotFound => StatusCode::NOT_FOUND,
Error::Forbidden(_) => StatusCode::FORBIDDEN,
Error::InternalError(GarageError::RPC(_)) => StatusCode::SERVICE_UNAVAILABLE,
Error::InternalError(_) | Error::Hyper(_) | Error::HTTP(_) => {
StatusCode::INTERNAL_SERVER_ERROR
}
_ => StatusCode::BAD_REQUEST,
}
}
pub fn into_http_response(&self) -> Response<Body> {
let body: Body = Body::from(format!("{}\n", self));
let mut http_error = Response::new(body);
*http_error.status_mut() = self.http_status_code();
http_error
}
}
pub trait OkOrBadRequest {
type S2;
fn ok_or_bad_request(self, reason: &'static str) -> Self::S2;
}
impl<T, E> OkOrBadRequest for Result<T, E>
where
E: std::fmt::Display,
{
type S2 = Result<T, Error>;
fn ok_or_bad_request(self, reason: &'static str) -> Result<T, Error> {
match self {
Ok(x) => Ok(x),
Err(e) => Err(Error::BadRequest(format!("{}: {}", reason, e))),
}
}
}
impl<T> OkOrBadRequest for Option<T> {
type S2 = Result<T, Error>;
fn ok_or_bad_request(self, reason: &'static str) -> Result<T, Error> {
match self {
Some(x) => Ok(x),
None => Err(Error::BadRequest(format!("{}", reason))),
}
}
}
pub trait OkOrInternalError {
type S2;
fn ok_or_internal_error(self, reason: &'static str) -> Self::S2;
}
impl<T, E> OkOrInternalError for Result<T, E>
where
E: std::fmt::Display,
{
type S2 = Result<T, Error>;
fn ok_or_internal_error(self, reason: &'static str) -> Result<T, Error> {
match self {
Ok(x) => Ok(x),
Err(e) => Err(Error::InternalError(GarageError::Message(format!(
"{}: {}",
reason, e
)))),
}
}
}
impl<T> OkOrInternalError for Option<T> {
type S2 = Result<T, Error>;
fn ok_or_internal_error(self, reason: &'static str) -> Result<T, Error> {
match self {
Some(x) => Ok(x),
None => Err(Error::InternalError(GarageError::Message(format!(
"{}",
reason
)))),
}
}
}
