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use std::{error, fmt, io};
use axum::{
http::StatusCode,
response::{IntoResponse, Response},
};
pub mod chain;
pub mod failed;
// I'm making an effort to avoid `anyhow` here, as that crate is _enormously_
// complex (though very usable). We don't need to be overly careful about
// allocations on errors in this app, so this is fine for most "general
// failure" cases.
type BoxedError = Box<dyn error::Error + Send + Sync>;
// Returns a 500 Internal Server Error to the client. Meant to be used via the
// `?` operator; _does not_ return the originating error to the client.
#[derive(Debug)]
pub struct Internal(Id, BoxedError);
impl<E> From<E> for Internal
where
E: Into<BoxedError>,
{
fn from(error: E) -> Self {
let id = Id::generate();
Self(id, error.into())
}
}
impl fmt::Display for Internal {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let Self(id, _) = self;
writeln!(f, "internal server error")?;
writeln!(f, "error id: {id}")?;
Ok(())
}
}
impl IntoResponse for Internal {
fn into_response(self) -> Response {
let Self(id, error) = &self;
chain::format_with_id(&mut io::stderr().lock(), id, error.as_ref())
.expect("write to stderr");
(StatusCode::INTERNAL_SERVER_ERROR, self.to_string()).into_response()
}
}
pub type Id = crate::id::Id<InternalError>;
#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct InternalError;
impl crate::id::Prefix for InternalError {
fn prefix(&self) -> &'static str {
"E"
}
}
pub struct Unauthorized;
impl IntoResponse for Unauthorized {
fn into_response(self) -> Response {
(StatusCode::UNAUTHORIZED, "unauthorized").into_response()
}
}
pub struct NotFound<E>(pub E);
impl<E> IntoResponse for NotFound<E>
where
E: std::error::Error,
{
fn into_response(self) -> Response {
let Self(response) = self;
(StatusCode::NOT_FOUND, response.to_string()).into_response()
}
}
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