How to manage huge file transfer

ServiceStack Virtual FileSystem
1

Hi
I would like to use the Virtual File System in order to upload / download file from my AppHost. In few rows I already add this functionality, but when I try to download a huge file (300mega) I saw the network percentage of the apphost reach 100% and I’m wondering if there is a better approch to handle files, maybe splitting them into small parts.

The method on the service is this

        public object Get(OrderProcessProgramFileGet request)
        {
            string path = $@"Programs\{request.FileName}";

            var file = HostContext.VirtualFileSources.GetFile(path);
            if (file == null)
                throw HttpError.NotFound($"File {path} does not exist");

            return new HttpResult(file, true)
            {
                ContentType = MimeTypes.GetMimeType(file.Extension)
            };
        }

and the method of the client is

            using (var client = new JsonServiceClient(@"http://localhost:50000"))
            {
                var request = new OrderProcessProgramFileGet()
                {
                    FileName = "f2013c46-ed5a-48a3-a92f-002e9cd8bd76.program"
                };
                var response = client.Get<object>(request);

                System.IO.File.WriteAllText($@"C:\Test\{request.FileName}", response.ToString());

            }

Any suggestion will be appreciated
Best regards
Enrico

2

The service implementation is fine as it will stream back the response but you’ll also want to stream back the response on the client. See the C# client docs for different examples from reading from a stream, e.g:

using var stream = await client.GetAsync<Stream>(new GetFile { 
    Path = "/path/to/file.png" 
});
using var fs = File.Create(Path.Combine(uploadsDir, "file.png"));
await stream.CopyToAsync(fs);

Note: If using you .NET Core you should use JsonHttpClient which avoids the abstraction penalty.