Struct Error 

pub struct Error {
    pub file: &'static str,
    pub line: u32,
    pub message: String,
}

Fields

file: &'static str

line: u32

message: String

Implementations

impl Error

pub fn new(file: &'static str, line: u32, message: String) -> Self

Examples: Registration middleware

 App::new().wrap(ErrorHandlers::new().handler(StatusCode::INTERNAL_SERVER_ERROR, internal_server::handler))

Define middleware handler

 pub fn handler<B>(mut res: dev::ServiceResponse<B>) -> actix_web::Result<ErrorHandlerResponse<B>> {
     println!("{}", "add_internal_server_error_header");
     Ok(ErrorHandlerResponse::Response(res.map_into_left_body()))
 }

Return an error

 #[get(path = "/index")]
 #[allow(unused)]
 async fn index(req: HttpRequest) -> Result<impl Responder, Error> {
     if true {
         let message = String::from("测试");
         Err::<HttpResponse, Error>(Error::new(file!(), line!(), message))
     } else {
         Ok(success_respond_to(&req, Some("测试")))
     }
 }

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, __derive_more_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 ResponseError for Error

fn status_code(&self) -> StatusCode

Returns appropriate status code for error.

fn error_response(&self) -> HttpResponse

Creates full response for error.