Google-api-dotnet-client: Upload fails on files larger than ChunkSize (UWP)

[AlKau]

I use google Api with UWP project
Nugets(Google.Apis 1.31.0-beta01, Google.Apis.Auth 1.31.0-beta01, Google.Apis.Drive.v3 1.30.0.1044) were installed.

I try upload file on google drive.

public async UploadAsync(string parentId, string fileName, IStorageFile inputFile, CancellationToken ct) 
{
    var body = new Google.Apis.Drive.v3.Data.File() {
        Name = fileName,
        Parents = new List<string>() { parentId }
    };
    using (var streamFile = await inputFile.OpenReadAsync()) {
        using (var stream = streamFile.AsStreamForRead()) {
            stream.Position = 0;
            var uploadRequest = _driveService.Files.Create(body, stream, inputFile.ContentType);
            uploadRequest.Fields = "id, name";
            uploadRequest.ProgressChanged += (obj) =>
            {
                    Debug.WriteLine($"sent - {obj.BytesSent}");
            };
            await uploadRequest.UploadAsync(ct);

            var file = uploadRequest.ResponseBody;
            Debug.WriteLine($"file - {file.Id}, {file.Name}");
        }
    }
}

I can only upload files < 10MB (by default). For large files(>10MB) UploadAsync doesn't finish and obj.BytesSent always 0.

When I change uploadRequest.ChunkSize the upload limit also changes.

[jskeet]

I do something very like this for Storage all the time, and it's fine - certainly from console apps.

Are you able to reproduce this issue with a console app, or does it only happen in UWP? Are any exceptions thrown, or does the task just never complete?

[AlKau]

I don't try console apps and exceptions aren't thrown. Task can be cancelled by CancellationToken.

p.s. Download works with large files

[jskeet]

Could you try a console app using the same code as far as you can? Knowing whether this is a UWP-specific issue or not would be a great first step.

[AlKau]

Console app can upload file(>10MB) successfully. The code is the same with a small difference in getting the stream.

Console app code:

string filePath;
using (var stream = new System.IO.FileStream(filePath, System.IO.FileMode.Open))

UWP app code:

IStorageFile inputFile;
using (var streamFile = await inputFile.OpenReadAsync()) {
    using (var stream = streamFile.AsStreamForRead())
...

p.s. I use the same nugets (Google.Apis 1.31.0-beta01, Google.Apis.Auth 1.31.0-beta01, Google.Apis.Drive.v3 1.30.0.1044)

[jskeet]

Okay, so this is only a problem on UWP. At the moment, UWP is an unsupported platform, but we are working on UWP support - so we'll need to make sure this works at that point too.

10MB is the size at which the upload uses multiple chunks, so presumably the problem is somewhere there.

[chrisdunelm]

Closing as UWP is an unsupported platform. Will re-open and investigate if we add support for UWP.