Struct Error 

pub struct Error { /* private fields */ }

A handler error: a status, a stable code, and an optional source kept for the logs. The visitor sees the status, a generic message, and the request’s reference; never the code or the source.

use web_net::Error;

let e = Error::not_found("blog.no_post");
assert_eq!((e.status(), e.code()), (404, "blog.no_post"));

let io = std::io::Error::other("disk gone");
let e = Error::internal("blog.read").with_source(io);
assert_eq!(e.status(), 500);
assert!(e.source_ref().is_some());

Implementations

impl Error

pub fn new(status: u16, code: &'static str) -> Self

An error with status (400 to 599; anything else is treated as 500).

pub fn bad_request(code: &'static str) -> Self

400 Bad Request.

pub fn forbidden(code: &'static str) -> Self

403 Forbidden.

pub fn not_found(code: &'static str) -> Self

404 Not Found.

pub fn conflict(code: &'static str) -> Self

409 Conflict.

pub fn unprocessable(code: &'static str) -> Self

422 Unprocessable Content: the request was understood and refused (a form with errors).

pub fn internal(code: &'static str) -> Self

500 Internal Server Error: our fault, not the visitor’s.

pub fn unavailable(code: &'static str) -> Self

503 Service Unavailable.

pub fn with_source( self, source: impl Into<Box<dyn Error + Send + Sync>>, ) -> Self

Keeps source for the logs.

pub const fn status(&self) -> u16

The status.

pub const fn code(&self) -> &'static str

The code.

pub fn source_ref(&self) -> Option<&(dyn Error + Send + Sync + 'static)>

The source, if one was kept.

Trait Implementations

impl Debug for Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Denial> for Error

fn from(d: Denial) -> Self

Converts to this type from the input type.

impl From<FormError> for Error

fn from(e: FormError) -> Self

The form’s status (400, 413, 415, 422, or 403 for a token) and code.

impl From<RenderError> for Error

fn from(e: RenderError) -> Self

Converts to this type from the input type.