Unable to open .bag file via Remote File URL — worker never reaches HTTP request step #793

Unable to open .bag file via Remote File URL — worker never reaches HTTP request step

Description:
When providing a remote file URL, RemoteDataSourceFactory converts the input into a urls array (even if there is only one value), and passes it to the worker. The initialize() function simply forwards { urls } to the worker.

This works fine for the .mcap worker because it supports both url and urls.
However, the .bag worker only recognizes file or url arguments and does not handle urls. Therefore, when it receives { urls: [...] }, it reaches the fallback path and throws:

Error: file or url required

Environment

• Version: develop V1.21
• Platform: Ubuntu 20.04
• Browser: Chrome

Suggested Fix (tested and works)

In RemoteDataSourceFactory.tsx around line ~111:

const initArgs =
  urls.length === 1 ? { url: urls[0] } : { urls };
const source = new WorkerSerializedIterableSource({ initWorker, initArgs });

By passing { url: urls[0] } when there is only one URL, the .bag worker receives a supported parameter and loads normally, while .mcap continues to support multi-file input as before.