Add content-length header when completing multipart requests

src/store/object_store.rs

@@ -582,7 +582,12 @@ impl ObjectStore {
 
         let (req, action) = self.build_request_inner(action);
 
-        req.body(action.body()).send().await
+        let body: Vec<u8> = action.body().into();
+
+        req.header(CONTENT_LENGTH, body.len())
+            .body(body)
+            .send()
+            .await
     }
 
     fn create_abort_multipart_request(