The total size of the file could not be obtained when downloading the file

When using Google Chrome to download, the download progress bar cannot reflect the current download status, only the size of the downloaded file can be seen, and the total size of the file cannot be seen.

No file or test is named in the issue. Start by locating the static-file download response path and reproduce the behavior in Google Chrome; done means the browser receives the total file size and the download progress can show it.

Written by the indexing model from the issue text.