允许用户 select 文件从 google 驱动器上传到我的服务器

Question

我正在使用 .Net MVC（使用 Razor）构建适合移动设备的网站（不是移动应用程序）。

我希望用户从他们的 Google 驱动器 select 单个单词/pdf/txt 文件并将其上传到我的 websites 就像上传常规文件一样。

到目前为止，我找到了 API 下载文件，但这没有帮助，他们不应该保存文件，只需上传 (post) 即可。

任何想法都很好，谢谢

Answer 1

首先需要使用 oauth2 对用户进行身份验证。

身份验证

/// <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.DriveFile   // view and manage files created by this app
};                                                

            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;

            }

           }

下载

 /// <summary>
        /// Download a file
        /// Documentation: https://developers.google.com/drive/v2/reference/files/get
        /// </summary>
        /// <param name="_service">a Valid authenticated DriveService</param>
        /// <param name="_fileResource">File resource of the file to download</param>
        /// <param name="_saveTo">location of where to save the file including the file name to save it as.</param>
        /// <returns></returns>
        public static Boolean downloadFile(DriveService _service, File _fileResource, string _saveTo)
        {

            if (!String.IsNullOrEmpty(_fileResource.DownloadUrl))
            {
                try
                {
                    var x = _service.HttpClient.GetByteArrayAsync(_fileResource.DownloadUrl );
                    byte[] arrBytes = x.Result;
                    System.IO.File.WriteAllBytes(_saveTo, arrBytes);
                    return true;                  
                }
                catch (Exception e)
                {
                    Console.WriteLine("An error occurred: " + e.Message);
                    return false;
                }
            }
            else
            {
                // The file doesn't have any content stored on Drive.
                return false;
            }
        }

从 Google dotnet samples google drive tutorial Google Drive service account

中窃取的代码

允许用户 select 文件从 google 驱动器上传到我的服务器

Allow users select file from google drvie to upload to my server

c#

google-drive-api