refactor: Upload extractor, 429 refusal test, stricter contract test

crates/adapters/http-axum/src/extractors/json.rs

@@ -2,7 +2,8 @@
 
 use axum::{
     extract::{
-        FromRequest, FromRequestParts, Path, Query, Request,
+        FromRequest, FromRequestParts, Multipart, Path, Query, Request,
+        multipart::MultipartRejection,
         rejection::{JsonRejection, PathRejection, QueryRejection},
     },
     http::{StatusCode, request::Parts},
@@ -52,6 +53,29 @@ impl From<PathRejection> for MalformedRequest {
     }
 }
 
+impl From<MultipartRejection> for MalformedRequest {
+    fn from(r: MultipartRejection) -> Self {
+        Self {
+            status: r.status(),
+            message: r.body_text(),
+        }
+    }
+}
+
+/// `axum::extract::Multipart` with refusals in the one error shape.
+pub struct Upload(pub Multipart);
+
+impl<S> FromRequest<S> for Upload
+where
+    S: Send + Sync,
+{
+    type Rejection = MalformedRequest;
+
+    async fn from_request(req: Request, state: &S) -> Result<Self, Self::Rejection> {
+        Ok(Self(Multipart::from_request(req, state).await?))
+    }
+}
+
 /// `axum::Json` with refusals in the one error shape.
 pub struct Body<T>(pub T);