errors.rs
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use axum::http::{ StatusCode };
use axum::response::{ IntoResponse, Response };
use std::fmt;
use std::io;
use std::num;
use std::path::{ PathBuf };
pub type Result<T> = std::result::Result<T, Error>;
pub(crate) enum Error {
AmbiguousPageTitle(PathBuf),
CannotDeterminePagePath(PathBuf),
FromConfigCrate(config::ConfigError),
FromRegexCrate(regex::Error),
FromStdIo(io::Error),
FromTeraCrate(tera::Error),
InvalidPort(num::TryFromIntError),
MissingPageTitle(PathBuf),
NonUtf8PagePath(PathBuf),
PageNotFound(String),
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use Error::*;
match *self {
AmbiguousPageTitle(ref pathbuf) => write!(f, "Page title is ambiguous (there must be exactly one `#` heading): {}", pathbuf.display()),
CannotDeterminePagePath(ref pathbuf) => write!(f, "Cannot determine page path: {}", pathbuf.display()),
FromConfigCrate(ref e) => write!(f, "Error from the config crate: {}", e),
FromRegexCrate(ref e) => write!(f, "Error from the regex crate: {}", e),
FromStdIo(ref e) => write!(f, "IO error: {}", e),
FromTeraCrate(ref e) => write!(f, "Error from the tera crate: {}", e),
InvalidPort(ref e) => write!(f, "Invalid network.port: {}", e),
MissingPageTitle(ref pathbuf) => write!(f, "Page does not have a title: {}", pathbuf.display()),
NonUtf8PagePath(ref pathbuf) => write!(f, "Page path is not valid UTF-8: {}", pathbuf.display()),
PageNotFound(ref path) => write!(f, "Page not found: {}", path),
}
}
}
impl From<config::ConfigError> for Error {
fn from(e: config::ConfigError) -> Error {
Error::FromConfigCrate(e)
}
}
impl From<regex::Error> for Error {
fn from(e: regex::Error) -> Error {
Error::FromRegexCrate(e)
}
}
impl From<io::Error> for Error {
fn from(e: io::Error) -> Error {
Error::FromStdIo(e)
}
}
impl From<tera::Error> for Error {
fn from(e: tera::Error) -> Error {
Error::FromTeraCrate(e)
}
}
impl IntoResponse for Error {
fn into_response(self) -> Response {
use Error::*;
tracing::error!("{}", self);
let (http_status_code, message) = match self {
PageNotFound(..) => (StatusCode::NOT_FOUND, "Page not found"),
_ => (StatusCode::INTERNAL_SERVER_ERROR, "The server encountered an unexpected error"),
};
(http_status_code, message).into_response()
}
}