diff --git a/src/response/response.rs b/src/response/response.rs index 9dd804be..9a3bb287 100644 --- a/src/response/response.rs +++ b/src/response/response.rs @@ -49,7 +49,10 @@ impl HttpResponse { /// Create an error response. #[inline] pub fn from_error(error: impl Into) -> Self { - error.into().as_response_error().error_response() + let error = error.into(); + let mut response = error.as_response_error().error_response(); + response.error = Some(error); + response } } diff --git a/tests/test_error_propagation.rs b/tests/test_error_propagation.rs new file mode 100644 index 00000000..1b56615a --- /dev/null +++ b/tests/test_error_propagation.rs @@ -0,0 +1,100 @@ +use actix_utils::future::{ok, Ready}; +use actix_web::dev::{Service, ServiceRequest, ServiceResponse, Transform}; +use actix_web::test::{call_service, init_service, TestRequest}; +use actix_web::{HttpResponse, ResponseError}; +use futures_util::lock::Mutex; +use std::future::Future; +use std::pin::Pin; +use std::sync::Arc; +use std::task::{Context, Poll}; + +#[derive(Debug, Clone)] +pub struct MyError; + +impl ResponseError for MyError {} + +impl std::fmt::Display for MyError { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "A custom error") + } +} + +#[actix_web::get("/test")] +async fn test() -> Result { + Err(MyError)?; + Ok(HttpResponse::NoContent().finish()) +} + +#[derive(Clone)] +pub struct SpyMiddleware(Arc>>); + +impl Transform for SpyMiddleware +where + S: Service, Error = actix_web::Error>, + S::Future: 'static, + B: 'static, +{ + type Response = ServiceResponse; + type Error = actix_web::Error; + type Transform = Middleware; + type InitError = (); + type Future = Ready>; + + fn new_transform(&self, service: S) -> Self::Future { + ok(Middleware { + was_error: self.0.clone(), + service, + }) + } +} + +#[doc(hidden)] +pub struct Middleware { + was_error: Arc>>, + service: S, +} + +impl Service for Middleware +where + S: Service, Error = actix_web::Error>, + S::Future: 'static, + B: 'static, +{ + type Response = ServiceResponse; + type Error = actix_web::Error; + type Future = Pin>>>; + + fn poll_ready(&self, cx: &mut Context<'_>) -> Poll> { + self.service.poll_ready(cx) + } + + fn call(&self, req: ServiceRequest) -> Self::Future { + let lock = self.was_error.clone(); + let response_future = self.service.call(req); + Box::pin(async move { + let response = response_future.await; + if let Ok(success) = &response { + *lock.lock().await = Some(success.response().error().is_some()); + } + response + }) + } +} + +#[actix_rt::test] +async fn error_cause_should_be_propagated_to_middlewares() { + let lock = Arc::new(Mutex::new(None)); + let spy_middleware = SpyMiddleware(lock.clone()); + + let app = init_service( + actix_web::App::new() + .wrap(spy_middleware.clone()) + .service(test), + ) + .await; + + call_service(&app, TestRequest::with_uri("/test").to_request()).await; + + let was_error_captured = lock.lock().await.unwrap(); + assert!(was_error_captured); +}