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added body manipulation example for error handlers (#2973)

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Closes https://github.com/actix/actix-web/issues/2856
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yinho999 2023-02-09 12:37:01 -08:00 committed by GitHub
parent bf1f169be2
commit bf19a0e761
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1 changed files with 24 additions and 0 deletions
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actix-web/src/middleware/err_handlers.rs
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@ -50,6 +50,8 @@ type DefaultHandler<B> = Option<Rc<ErrorHandler<B>>>;
/// will pass by unchanged by this middleware.
///
/// # Examples
/// ## Handler Response
/// Header
/// ```
/// use actix_web::http::{header, StatusCode};
/// use actix_web::middleware::{ErrorHandlerResponse, ErrorHandlers};
@ -67,6 +69,28 @@ type DefaultHandler<B> = Option<Rc<ErrorHandler<B>>>;
/// .wrap(ErrorHandlers::new().handler(StatusCode::INTERNAL_SERVER_ERROR, add_error_header))
/// .service(web::resource("/").route(web::get().to(HttpResponse::InternalServerError)));
/// ```
///
/// Body Content
/// ```
/// use actix_web::http::{header, StatusCode};
/// use actix_web::middleware::{ErrorHandlerResponse, ErrorHandlers};
/// use actix_web::{dev, web, App, HttpResponse, Result};
/// fn add_error_body<B>(res: dev::ServiceResponse<B>) -> Result<ErrorHandlerResponse<B>> {
/// // Get the error message and status code
/// let error_message = "An error occurred";
/// // Destructures ServiceResponse into request and response components
/// let (req, res) = res.into_parts();
/// // Create a new response with the modified body
/// let res = res.set_body(error_message).map_into_boxed_body();
/// // Create a new ServiceResponse with the modified response
/// let res = dev::ServiceResponse::new(req, res).map_into_right_body();
/// Ok(ErrorHandlerResponse::Response(res))
///}
///
/// let app = App::new()
/// .wrap(ErrorHandlers::new().handler(StatusCode::INTERNAL_SERVER_ERROR, add_error_body))
/// .service(web::resource("/").route(web::get().to(HttpResponse::InternalServerError)));
/// ```
/// ## Registering default handler
/// ```
/// # use actix_web::http::{header, StatusCode};