如何使用C#从Google Drive下载二进制文件

using Google.Apis.Auth.OAuth2;
using Google.Apis.Drive.v3;
using Google.Apis.Services;
using System.IO;

public class GoogleDriveDownloader
{
    private static DriveService GetDriveService()
    {
        // 从Google Cloud Console创建的凭据文件中获取客户端ID和客户端密钥
        string clientId = "YOUR_CLIENT_ID";
        string clientSecret = "YOUR_CLIENT_SECRET";

        // 从Google Cloud Console创建的凭据文件中获取重定向URI
        string redirectUri = "YOUR_REDIRECT_URI";

        // 使用上述凭据信息创建UserCredential对象
        UserCredential credential;
        using (var stream = new FileStream("credentials.json", FileMode.Open, FileAccess.Read))
        {
            credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
                GoogleClientSecrets.Load(stream).Secrets,
                new[] { DriveService.Scope.Drive },
                "user",
                System.Threading.CancellationToken.None,
                new FileDataStore("Drive.Api.Auth.Store")).Result;
        }

        // 创建DriveService对象
        var service = new DriveService(new BaseClientService.Initializer()
        {
            HttpClientInitializer = credential,
            ApplicationName = "Google Drive Downloader"
        });

        return service;
    }

    public static void DownloadFile(string fileId, string savePath)
    {
        var service = GetDriveService();

        // 根据文件ID获取文件的元数据
        var file = service.Files.Get(fileId).Execute();

        // 创建文件流，用于保存下载的二进制文件
        using (var fileStream = new FileStream(savePath, FileMode.Create, FileAccess.Write))
        {
            // 使用FilesResource.Export方法下载文件的二进制内容
            service.Files.Export(fileId, "application/octet-stream")
                .Download(fileStream);
        }
    }
}