Google Drive API v3使用JSON而不是P12（服务帐户）-意外字符

Question

错误：解析值时遇到意外字符：e。路径''，第0行，位置0。

我正在使用Google .Net客户端库来访问Google驱动器API v3，尤其是Google.Apis.Drive.v3程序包。我正在通过C＃授权使用“服务帐户”。

使用p12密钥进行授权是没有问题的。但是，建议使用JSON，并保留p12格式以实现向后兼容。

我从Google Developers Console下载了JSON文件，并尝试使用以下代码进行授权：

    public static Google.Apis.Drive.v3.DriveService AuthenticateServiceAccountJSON(string keyFilePath) {

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

        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.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 {
            using (var stream = new FileStream(keyFilePath, FileMode.Open, FileAccess.Read)) {
                var credential = GoogleCredential.FromStream(stream);
                if (credential.IsCreateScopedRequired) {
                    credential.CreateScoped(scopes);
                }
                // Create the service.
                Google.Apis.Drive.v3.DriveService service = new Google.Apis.Drive.v3.DriveService(new BaseClientService.Initializer() {
                    HttpClientInitializer = credential,
                    ApplicationName = "MyDrive",
                });
                return service;
            }
        } catch (Exception ex) {
            Console.WriteLine(ex.InnerException);
            return null;

        }
    }

我在记事本中查看了JSON文件，它似乎已加密。

“ ewogICJ0eXBlIjogInNlcnZpY2VfYWNjb3VudCIsCiAgInByb2plY3RfaWQiOiAicmfkaWFudC1tZXJjdXJ5LTEyMjkwNyIsCiAgIn ..........”

可以继续使用P12吗？

Answer 1

确保您正在下载正确的文件...

GoogleCredential.FromStream(stream)

适用于 JSON 文件。它应该看起来像这样：

{
  "type": "service_account",
  "project_id": "",
  "private_key_id": "",
  "private_key": "-----BEGIN PRIVATE KEY-----
---END PRIVATE KEY-----\n",
  "client_email": "",
  "client_id": "",
  "auth_uri": "https://accounts.google.com/o/oauth2/auth",
  "token_uri": "https://accounts.google.com/o/oauth2/token",
  "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
  "client_x509_cert_url": ""
}

您可以通过单击显示客户端 ID 的网格右侧的“下载 JSON”按钮，从https://console.developers.google.com/apis/credentials获取此文件。只需确保所选 ID 的类型为“服务帐户客户端”即可。