使用 google-drive-api 和 c# 将文件上传到驱动器

Question

我是运行这个代码：

    private static string[] Scopes = { DriveService.Scope.DriveReadonly };
    private static string ApplicationName = "Drive API .NET Quickstart";
    private static string _folderId = "0B3s20ZXnD-M7dkdhZzZaeXZRTWc";
    private static string _fileName = "testFile";
    private static string _filePath = @"C:\Users\Yosi\Desktop\bla bla.rar";
    private static string _contentType = "application/zip";

    static void Main(string[] args)
    {
        Console.WriteLine("create cred");
        UserCredential credential = GetUserCredential();

        Console.WriteLine("Get Services");
        DriveService service = GetDriveService(credential);

        Console.WriteLine("Upload File");
        UploadFileToDrive(service, _fileName, _filePath, _contentType);

    }


    private static UserCredential GetUserCredential()
    {
        using (var stream = new FileStream("client_secret.json", FileMode.OpenOrCreate, FileAccess.Read))
        {
            string credPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
            credPath = Path.Combine(credPath, ".credentials/drive-dotnet-quickstart.json");

            return GoogleWebAuthorizationBroker.AuthorizeAsync(
                GoogleClientSecrets.Load(stream).Secrets,
                Scopes,
                "user1",
                CancellationToken.None,
                new FileDataStore(credPath, true)).Result;
        }
    }

    private static DriveService GetDriveService(UserCredential credential)
    {
        return new DriveService(
            new BaseClientService.Initializer()
            {
                HttpClientInitializer = credential,
                ApplicationName = ApplicationName,
            });
    }

    private static string UploadFileToDrive (DriveService service, string fileName, string filePath, string conentType)
    {
        var fileMatadata = new Google.Apis.Drive.v3.Data.File();
        fileMatadata.Name = fileName;
        fileMatadata.Parents = new List<string> { _folderId };

        FilesResource.CreateMediaUpload request;

        using (var stream = new FileStream(filePath, FileMode.Open))
        {
            request = service.Files.Create(fileMatadata, stream, conentType);
            request.Upload();
        }

        var file = request.ResponseBody;

        return file.Id;


    }
}

并得到以下异常：

当我调用函数时：GetUserCredential();

任何可能导致错误的想法？

我实际上是逐字复制视频中的代码，但我看不出该错误有任何合乎逻辑的原因。我使用的视频：https://www.youtube.com/watch?v=nhQPwrrJ9kI&t=259s

Answer 1

请仔细检查下面的 link 如何获取用户凭据。

OAuth 2.0 - Credentials

这是代码示例：

   private async Task Run()
    {   
        UserCredential credential;
        using (var stream = new FileStream("client_secrets.json", FileMode.Open, FileAccess.Read))
        {
            credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(
                GoogleClientSecrets.Load(stream).Secrets,
                new[] { BooksService.Scope.Books },
                "user", CancellationToken.None, new FileDataStore("Books.ListMyLibrary"));
        }

        // Create the service.
        var service = new BooksService(new BaseClientService.Initializer()
            {
                HttpClientInitializer = credential,
                ApplicationName = "Books API Sample",
            });

        var bookshelves = await service.Mylibrary.Bookshelves.List().ExecuteAsync();
        ...
    }

Answer 2

这是失败的：

GoogleClientSecrets.Load(stream).Secrets

如果没有该文件，您可以使用以下说明生成该文件：https://github.com/jay0lee/GAM/wiki/CreatingClientSecretsFile

确保文件 client_secret.json 存在于您的应用程序文件夹（exe 所在的位置）中，然后：

using (var stream = new FileStream(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, 
            "client_secret.json"), FileMode.OpenOrCreate, FileAccess.Read))

当然，部署应用时不要包含这个文件，每个用户都必须有并复制自己的文件到应用文件夹中。

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