通过API上传到Google云端硬盘时出现“禁止”错误

问题可能是您请求的范围

DriveService.Scope.DriveFile,   // view and manage files created by this app

尝试

DriveService.Scope.Drive,  // view and manage your files and documents

我的代码：

 /// <summary>
        /// Authenticate to Google Using Oauth2
        /// Documentation https://developers.google.com/accounts/docs/OAuth2
        /// </summary>
        /// <param name="clientId">From Google Developer console https://console.developers.google.com</param>
        /// <param name="clientSecret">From Google Developer console https://console.developers.google.com</param>
        /// <param name="userName">The user to authorize.</param>
        /// <returns>a valid DriveService</returns>
        public static DriveService AuthenticateOauth(string clientId, string clientSecret, string userName)
        {
            if (string.IsNullOrEmpty(clientId))
                throw new Exception("clientId is required.");
            if (string.IsNullOrEmpty(clientSecret))
                throw new Exception("clientSecret is required.");
            if (string.IsNullOrEmpty(userName))
                throw new Exception("userName is required for datastore.");

            string[] scopes = new string[] { DriveService.Scope.Drive};
            try
            {
                string credPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
                credPath = Path.Combine(credPath, ".credentials/Drive");
                // here is where we Request the user to give us access, or use the Refresh Token that was previously stored in %AppData%
                UserCredential credential = GoogleWebAuthorizationBroker.AuthorizeAsync(new ClientSecrets { ClientId = clientId, ClientSecret = clientSecret }
                                                                                             , scopes
                                                                                             , userName
                                                                                             , CancellationToken.None
                                                                                             , new FileDataStore(credPath, true)).Result;
                var service = new DriveService(new BaseClientService.Initializer()
                {
                    HttpClientInitializer = credential,
                    ApplicationName = "Drive Authentication Sample",
                });
                return service;
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.InnerException);
                throw ex;
            }
        }
/// <summary>
        /// Insert a new file.
        /// Documentation: https://developers.google.com/drive//v2/files/insert
        /// </summary>
        /// <param name="service">Valid authentcated DriveService</param>
        /// <param name="body">Valid File Body</param>
        /// <returns>File </returns>
        public static File Insert(DriveService service, File body)
        {
            //Note Genrate Argument Exception (https://msdn.microsoft.com/en-us/library/system.argumentexception(loband).aspx)
            try
            {  
            return          service.Files.Insert(body).Execute();
            }
            catch (Exception ex)
            {
                Console.WriteLine("Request Failed " + ex.Message);
                throw ex;
            }
         }
  private static string GetMimeType(string fileName)
        {
            string mimeType = "application/unknown";
            string ext = System.IO.Path.GetExtension(fileName).ToLower();
            Microsoft.Win32.RegistryKey regKey = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(ext);
            if (regKey != null && regKey.GetValue("Content Type") != null)
                mimeType = regKey.GetValue("Content Type").ToString();
            return mimeType;
        }

执行

var driveService = StandardGoogleAuth.AuthenticateOauth("xxxxx.apps.googleusercontent.com", "uxpj6hx1H2N5BFqdnaNhIbie", "user");
                var uploadfileName = @"C:'Temp'test.txt";
               File body = new File();
                body.Title = System.IO.Path.GetFileName(uploadfileName);
                body.Description = "File uploaded by Diamto Drive Sample";
                body.MimeType =  GetMimeType(uploadfileName);
                body.Parents = new List<ParentReference>() { new ParentReference() { Id = "root" } };
                // File's content.
                byte[] byteArray = System.IO.File.ReadAllBytes(uploadfileName);
                System.IO.MemoryStream stream = new System.IO.MemoryStream(byteArray);
             var result = FilesSample.Insert(driveService,body);

修改范围不会自动更新到 TOKENRESPONSE 用户文件中。您必须重新生成该文件。

搜索"drive-dotnet-quickstart.json"并从中删除"Google.Apis.Auth.OAuth2.Responses.TokenResponse-user"。然后运行代码以重新生成该文件。