impl IntoFuture for HttpResponse for all body types

actix-web/Cargo.toml

@@ -92,6 +92,7 @@ mime = "0.3"
 once_cell = "1.5"
 pin-project-lite = "0.2.7"
 regex = "1.5.5"
+rustversion = "1"
 serde = "1.0"
 serde_json = "1.0"
 serde_urlencoded = "0.7"

actix-web/src/response/response.rs

@@ -333,12 +333,14 @@ impl<B> From<HttpResponse<B>> for Response<B> {
 #[cfg(test)]
 mod response_fut_impl {
     use std::{
-        future::Future,
+        future::{Future, IntoFuture},
         mem,
         pin::Pin,
         task::{Context, Poll},
     };
 
+    use actix_utils::future::{ready, Ready};
+
     use super::*;
 
     // Future is only implemented for BoxBody payload type because it's the most useful for making
@@ -361,6 +363,18 @@ mod response_fut_impl {
             )))
         }
     }
+
+    impl<B> IntoFuture for HttpResponse<B> {
+        type Output = Result<Response<B>, Error>;
+        type IntoFuture = Ready<Self::Output>;
+
+        fn into_future(self) -> Self::IntoFuture {
+            ready(match self.error.take() {
+                Some(err) => Err(err),
+                None => Ok(self.res),
+            })
+        }
+    }
 }
 
 impl<B> Responder for HttpResponse<B>