Error on DownloadFileAsync with sandbox files id

[sliberali1986]

Bug Report

Overview

Unable to download sanbox files with FilesEndpoint.DownloadFileAsync.

To Reproduce

Steps to reproduce the behavior:

1. Ask AI to create a file (for example a pptx file).
2. The MessageResponse object contains a message like "Download file here: (sandbox:/mnt/data/total_amount_by_year.pptx)" and the Attachments property contains the File Id.
3. The file response obtained with FilesEndpoint.GetFileInfoAsync is valid. The FileName property has the value "/mnt/data/total_amount_by_year.pptx".
4. Call the FilesEndpoint.DownloadFileAsync to save binary.
5. Exception: System.IO.DirectoryNotFoundException: Could not find a part of the path 'C:\mnt\data\total_amount_by_year.pptx'.

Expected behavior

Everything works and the binary will be saved in file system.

Screenshots

[StephenHodgson]

Likely you need to use RetrieveFileStreamAsync option so you can save the contents to disk yourself.

Is this in a browser app, console, or embedded somewhere else?

[sliberali1986]

Hi @StephenHodgson,
I'm using the package in a WebAPI. The directory is local (with read/write permission). The problem is the Path.Combine when FileResponse.FileName contains something like "/mnt/data/....". Check my screenshot:

The Path.Combine returns a value that ignore the passed directory and after it try to write the file under C:\mnt\data... with exception. I solved the issue using the RetrieveFileStreamAsync and wrapping the FileResponse.FileName with Path.GetFileName to obtain a valid file path. Thanks for your help.