# actix_web::middleware::ErrorHandlers - Rust
API documentation for the Rust `ErrorHandlers` struct in crate `actix_web`.
Keywords: rust, rustlang, rust-lang, ErrorHandlers

# Struct actix_web::middleware::ErrorHandlers [−] [src]

    pub struct ErrorHandlers<S> { /* fields omitted */ }

`Middleware` for allowing custom handlers for responses.

You can use `ErrorHandlers::handler()` method to register a custom error handler for specific status code. You can modify existing response or create completely new one.

## Example

    use actix_web::middleware::{ErrorHandlers, Response};
    use actix_web::{http, App, HttpRequest, HttpResponse, Result};

    fn render_500<S>(_: &HttpRequest<S>, resp: HttpResponse) -> Result<Response> {
        let mut builder = resp.into_builder();
        builder.header(http::header::CONTENT_TYPE, "application/json");
        Ok(Response::Done(builder.into()))
    }

    fn main() {
        let app = App::new()
            .middleware(
                ErrorHandlers::new()
                    .handler(http::StatusCode::INTERNAL_SERVER_ERROR, render_500),
            )
            .resource("/test", |r| {
                r.method(http::Method::GET).f(|_| HttpResponse::Ok());
                r.method(http::Method::HEAD)
                    .f(|_| HttpResponse::MethodNotAllowed());
            })
            .finish();
    }

## Methods

###

`impl<S> ErrorHandlers<S>`

[src]

####

`pub fn new() -> Self`

[src]

Construct new `ErrorHandlers` instance

####

`pub fn handler<F>(self, status: StatusCode, handler: F) -> Self where F: Fn(&HttpRequest<S>, HttpResponse) -> Result<Response> + 'static,`

[src]

Register error handler for specified status code

## Trait Implementations

###

`impl<S> Default for ErrorHandlers<S>`

[src]

####

`fn default() -> Self`

[src]

Returns the "default value" for a type. Read more

###

`impl<S: 'static> Middleware<S> for ErrorHandlers<S>`

[src]

####

`fn response(&self, req: &HttpRequest<S>, resp: HttpResponse) -> Result<Response>`

[src]

Method is called when handler returns response, but before sending http message to peer. Read more

####

`fn start(&self, req: &HttpRequest<S>) -> Result<Started>`

[src]

Method is called when request is ready. It may return future, which should resolve before next middleware get called. Read more

####

`fn finish(&self, req: &HttpRequest<S>, resp: &HttpResponse) -> Finished`

[src]

Method is called after body stream get sent to peer.

## Auto Trait Implementations

###

`impl<S> !Send for ErrorHandlers<S>`

###

`impl<S> !Sync for ErrorHandlers<S>`

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