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我正在尝试通过 API Google Drive 发送文件，但是，我找不到任何有关如何使用身份验证服务帐户执行 C# 上传文件的文档。

我下载了 Daimto 库，但是，当我们使用身份验证 ClientId 和 ClientSecret 时，他使用 DriveService 类上传。但是使用帐户服务的身份验证，他返回到 PlusService 类，发现无法通过这种方式上传文件。

有人能帮我吗？此致

使用身份验证服务帐户

    public PlusService GoogleAuthenticationServiceAccount()
    {
        String serviceAccountEmail = "106842951064-6s4s95s9u62760louquqo9gu70ia3ev2@developer.gserviceaccount.com";

        //var certificate = new X509Certificate2(@"key.p12", "notasecret", X509KeyStorageFlags.Exportable);
        var certificate = new X509Certificate2(@"key.p12", "notasecret", X509KeyStorageFlags.Exportable);

        ServiceAccountCredential credential = new ServiceAccountCredential(
           new ServiceAccountCredential.Initializer(serviceAccountEmail)
           {
               Scopes = new[] { PlusService.Scope.PlusMe }
           }.FromCertificate(certificate));

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

        return service;
    }

使用身份验证 ClientId 和 ClientSecret

    public DriveService GoogleAuthentication(string userClientId, string userSecret)
    {
        //Scopes for use with the Google Drive API
        string[] scopes = new string[] { DriveService.Scope.Drive, DriveService.Scope.DriveFile };
        // 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 = userClientId, ClientSecret = userSecret }, scopes, Environment.UserName, CancellationToken.None, new FileDataStore("Daimto.GoogleDrive.Auth.Store")).Result;

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

        return service;
    }

Daimto 类方法，使文件上传到谷歌驱动器 DaimtoGoogleDriveHelper.uploadFile(_service, fileName, item.NomeArquivo, directoryId);

如您所见，Daimto 库有一个上传方法，但是使用了 _service 参数，即 DriveService 类型，即 GoogleAuthentication 方法返回的内容。但是 GoogleAuthenticationServiceAccount 方法返回的是 PlusService 类型，与 DriveService 类型不兼容。

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1 回答 1

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我不确定您正在关注我的哪一个教程。但是您的第一个代码块是使用 PlusService，您应该使用 DriveService。您对 Google Drive API 提出的任何请求都必须通过 DriveService

使用服务帐户对 Google 云端硬盘进行身份验证：

/// <summary>
        /// Authenticating to Google using a Service account
        /// Documentation: https://developers.google.com/accounts/docs/OAuth2#serviceaccount
        /// </summary>
        /// <param name="serviceAccountEmail">From Google Developer console https://console.developers.google.com</param>
        /// <param name="keyFilePath">Location of the Service account key file downloaded from Google Developer console https://console.developers.google.com</param>
        /// <returns></returns>
        public static DriveService AuthenticateServiceAccount(string serviceAccountEmail, string keyFilePath)
        {

            // check the file exists
            if (!File.Exists(keyFilePath))
            {
                Console.WriteLine("An Error occurred - Key file does not exist");
                return null;
            }

            //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     

            var certificate = new X509Certificate2(keyFilePath, "notasecret", X509KeyStorageFlags.Exportable);
            try
            {
                ServiceAccountCredential credential = new ServiceAccountCredential(
                    new ServiceAccountCredential.Initializer(serviceAccountEmail)
                   {
                       Scopes = scopes
                   }.FromCertificate(certificate));

                // Create the service.
                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;

            }
        }
    }

上传一个文件：

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;
        }

        /// <summary>
        /// Uploads a file
        /// Documentation: https://developers.google.com/drive/v2/reference/files/insert
        /// </summary>
        /// <param name="_service">a Valid authenticated DriveService</param>
        /// <param name="_uploadFile">path to the file to upload</param>
        /// <param name="_parent">Collection of parent folders which contain this file. 
        ///                       Setting this field will put the file in all of the provided folders. root folder.</param>
        /// <returns>If upload succeeded returns the File resource of the uploaded file 
        ///          If the upload fails returns null</returns>
        public static File uploadFile(DriveService _service, string _uploadFile, string _parent) {

            if (System.IO.File.Exists(_uploadFile))
            {
                File body = new File();
                body.Title = System.IO.Path.GetFileName(_uploadFile);
                body.Description = "File uploaded by Diamto Drive Sample";
                body.MimeType = GetMimeType(_uploadFile);
                body.Parents = new List<ParentReference>() { new ParentReference() { Id = _parent } };

                // File's content.
                byte[] byteArray = System.IO.File.ReadAllBytes(_uploadFile);
                System.IO.MemoryStream stream = new System.IO.MemoryStream(byteArray);
                try
                {
                    FilesResource.InsertMediaUpload request = _service.Files.Insert(body, stream, GetMimeType(_uploadFile));
                    request.Upload();
                    return request.ResponseBody;
                }
                catch (Exception e)
                {
                    Console.WriteLine("An error occurred: " + e.Message);
                    return null;
                }
            }
            else {
                Console.WriteLine("File does not exist: " + _uploadFile);
                return null;
            }           

        }

如果您使用的是 Oauth2 或服务帐户，则上传代码是相同的，没有区别。

从Github 教程 上的 Google Drive .net 示例中提取的代码：带有 C# .net 的 Google Drive API – 下载

于 2015-03-12T12:32:40.183 回答