fix: Respond with HTTP code 413, when request size is too big

src/api/ruma_wrapper/axum.rs

@@ -59,7 +59,15 @@ where
                     .unwrap_or(usize::MAX),
             )
             .await
-            .map_err(|_| Error::BadRequest(ErrorKind::MissingToken, "Missing token."))?;
+            .map_err(|err| {
+                if std::error::Error::source(&err).as_ref().and_then(|err| std::error::Error::source(err)).is_some() {
+                    Error::BadRequest(
+                        ErrorKind::ResourceLimitExceeded{ admin_contact: String::default() },
+                        "Reached maximum request size")
+                } else {
+                    Error::BadRequest(ErrorKind::Unknown, "An unknown error has occurred")
+                }
+            })?;
             (parts, body)
         };