File Upload Endpoint on ASP.NET web api corrupts file

Question

I'm using .Net Framework 4.7 ASP.NET Web Api

After uploading the files to the endpoint, I noticed the files are corrupted.

    [HttpPost]
    public async Task UploadFile([FromODataUri] string key)
    {
        if (!Request.Content.IsMimeMultipartContent())
        {
            throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
        }

       var provider = await Request.Content.ReadAsMultipartAsync(new MultipartMemoryStreamProvider());
       var file = provider.Contents.Single();

       //get a corrupted file + size of file has increased significantly
       var fileBytes = await file.ReadAsByteArrayAsync();

    }

*I Also tried working with ReadAsStreamAsync and then read all the bytes, but looks like the data is still changed...

What am I doing wrong? Thanks, Adi.

Answer 1

The Owin Handler is the responsible for the errors. No solution were until now. Just a recommendation to not bother with it and just create another service for file uploads. good luck, Still waiting for answer btw.