Downloading a csv file fails with Multiple_Content_Disposition

ServiceStack
1

I have a web-based file upload/download mechanism using ServiceStack (5.11.0). The backend is running on Windows/IIS(Express).

It works for different file types (e.g. txt, pdf, xslx, docx, jpg, etc.), however trying to download a .csv file fails with a browser (Chrome/Edge) error:

ERR_RESPONSE_HEADERS_MULTIPLE_CONTENT_DISPOSITION

I have no errors recorded in my log files and no backend exceptions thrown when debugging in Rider.

The essence of my download service is:

[Route("/filestore/file/{FileName}", "GET")]
public class GetFile : IReturn<HttpResult>, IGet
{
    public string FileName { get; init; }
}

Implementation:

public object Get(GetFile request)
{
    var fsroot = @"C"\temp";
    var path = Path.Combine(fsroot, request.FileName);

    var file = VirtualFiles.GetFile(path);
    var mime = MimeTypes.GetMimeType(file.Extension);

    var response = new HttpResult(file, mime, asAttachment: true);
    return response;
}

Anybody know why csv files do not download?

2

Can you post the raw HTTP Request and Response Headers.

3

I’m assuming the issue is the built-in CsvFormat is also adding Content-Disposition headers which duplicates them, it should be resolved from this commit where if you’re returning a HttpResult it’s assumed you’re taking over the custom HTTP Response Headers.

This change is available from v5.11.1 that’s now available on MyGet.

4

5.11.1 solves the problem.

Perfect support, license is worth every penny.

Thank you.

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