请求执行失败：https://docs.google.com/feeds/default/private/full?max-results=200

Execution of request failed: https://docs.google.com/feeds/default/private/full?max-results=200

我正在尝试使用以下代码获取 google 驱动器文件列表，但出现错误 请求执行失败：https://docs.google.com/feeds/default/private/full?max-results=2000

以前它可以工作，但从最近几个月开始它不工作我无法理解我要去哪里wrong.please帮助我

OAuth2Parameters parameters = new OAuth2Parameters()
    {
        ClientId = "MYID.apps.googleusercontent.com",
        ClientSecret = "MYSECREAT",
        RedirectUri = currentURL,//"http://localhost:6692/Home.html"
        Scope = "https://docs.google.com/feeds/ ",
        State = "documents",
        AccessType = "offline",//offline means it creats a refreshtoken 
        TokenExpiry = DateTime.Now.AddYears(1)
    };
parameters.AccessCode = code;
Google.GData.Client.OAuthUtil.GetAccessToken(parameters);

GOAuth2RequestFactory requestFactory = new GOAuth2RequestFactory(null, "NAME", parameters);
DocumentsService service = new DocumentsService("NAME");
service.RequestFactory = requestFactory;
//requestFactory.CustomHeaders["Authorization"] = "Bearer " + parameters.AccessToken;
DocumentsListQuery query = new DocumentsListQuery();
query.NumberToRetrieve = 2000;

// Make a request to the API and get all documents.
//I Got an error in following line
DocumentsFeed feed = service.Query(query);

部分问题是您使用的是旧的 Gdata 调用。虽然旧的 GData API 仍然很难让它与 Oauth2 一起工作，因为你不能再使用客户端登录，并且当客户端登录是一个选项时它被恢复了。

我推荐使用 Google .net 客户端库，它使用新的 Google Drive Rest API

PM> Install-Package Google.Apis.Drive.v2

连接 Oauth2 class:

/// <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">A string used to identify a user.</param>
        /// <returns></returns>
        public static DriveService AuthenticateOauth(string clientId, string clientSecret, string userName)
        {

            //Google Drive scopes Documentation:   https://developers.google.com/drive/web/scopes
            string[] scopes = new string[] { DriveService.Scope.Drive,  // view and manage your files and documents
                                             DriveService.Scope.DriveAppdata,  // view and manage its own configuration data
                                             DriveService.Scope.DriveAppsReadonly,   // view your drive apps
                                             DriveService.Scope.DriveFile,   // view and manage files created by this app
                                             DriveService.Scope.DriveMetadataReadonly,   // view metadata for files
                                             DriveService.Scope.DriveReadonly,   // view files and documents on your drive
                                             DriveService.Scope.DriveScripts };  // modify your app scripts


            try
            {
                // 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("Daimto.Drive.Auth.Store")).Result;

                DriveService service = new DriveService(new BaseClientService.Initializer()
                {
                    HttpClientInitializer = credential,
                    ApplicationName = "Daimto Drive API Sample",
                });
                return service;
            }
            catch (Exception ex)
            {

                Console.WriteLine(ex.InnerException);
                return null;

            }

        }

连接：

  // Connect with Oauth2 Ask user for permission
            String CLIENT_ID = "xxx-d0vpdthl4ms0soutcrpe036ckqn7rfpn.apps.googleusercontent.com";
            String CLIENT_SECRET = "NDmluNfTgUk6wgmy7cFo64RV";      
            DriveService service = Authentication.AuthenticateOauth(CLIENT_ID, CLIENT_SECRET, Environment.UserName);

列出文件方法：

 /// Documentation Search: https://developers.google.com/drive/web/search-parameters
        /// </summary>
        /// <param name="service">a Valid authenticated DriveService</param>        
        /// <param name="search">if Search is null will return all files</param>        
        /// <returns></returns>
        public static IList<File> GetFiles(DriveService service, string search)
        {

            IList<File> Files = new List<File>();

            try
            {
                //List all of the files and directories for the current user.  
                // Documentation: https://developers.google.com/drive/v2/reference/files/list
                FilesResource.ListRequest list = service.Files.List();
                list.MaxResults = 1000;
                if (search != null)
                {
                    list.Q = search;
                }
                FileList filesFeed = list.Execute();

                //// Loop through until we arrive at an empty page
                while (filesFeed.Items != null)
                {
                    // Adding each item  to the list.
                    foreach (File item in filesFeed.Items)
                    {
                        Files.Add(item);
                    }

                    // We will know we are on the last page when the next page token is
                    // null.
                    // If this is the case, break.
                    if (filesFeed.NextPageToken == null)
                    {
                        break;
                    }

                    // Prepare the next page of results
                    list.PageToken = filesFeed.NextPageToken;

                    // Execute and process the next page request
                    filesFeed = list.Execute();
                }
            }
            catch (Exception ex) {
                // In the event there is an error with the request.
                Console.WriteLine(ex.Message);                            
            }
            return Files;
        }

列出文件：

 // Listing files with search.  
                // This searches for a directory with the name DiamtoSample
                string Q = "title = 'DiamtoSample' and mimeType = 'application/vnd.google-apps.folder'";
                IList<File> _Files = DaimtoGoogleDriveHelper.GetFiles(service, Q);

                foreach (File item in _Files)
                {
                    Console.WriteLine(item.Title + " " + item.MimeType);
                }

有用链接