Google NLP authentication/call 问题

Question

我正在开发一个 MVC 网络应用程序，它使用 Google Natural Language Processing API 来解析来自用户的不同输入。

我已经成功使用并实施了 API 操作，只要我运行在我的本地计算机上应用程序，一切都正常。但是，一旦我发布一个版本并将其上传到服务器上，我就会在调用 API 方法（例如 AnalyzeSentiment）时收到以下错误：

Status(StatusCode=Unauthenticated, Detail="Getting metadata from plugin failed with error: Exception occured in metadata credentials plugin.")

借助 post 的答案：我能够进一步了解错误的详细信息（使用 gRCP）：

An error occurred while sending the request.
Stacktrace:    at Google.Apis.Http.ConfigurableMessageHandler.<SendAsync>d__58.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Google.Apis.Auth.OAuth2.Requests.TokenRequestExtenstions.<ExecuteAsync>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Google.Apis.Auth.OAuth2.ServiceAccountCredential.<RequestAccessTokenAsync>d__19.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Google.Apis.Auth.OAuth2.ServiceCredential.<GetAccessTokenForRequestAsync>d__23.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Google.Apis.Auth.OAuth2.ServiceAccountCredential.<GetAccessTokenForRequestAsync>d__20.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Grpc.Auth.GoogleAuthInterceptors.<>c__DisplayClass2_0.<<FromCredential>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Grpc.Core.Internal.NativeMetadataCredentialsPlugin.<GetMetadataAsync>d__11.MoveNext()

这似乎是一个身份验证问题，所以我仔细检查了 jsonKey 文件，没有问题。请注意，我使用代码在环境变量中设置凭据：

Environment.SetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS", jsonPath);

并使用以下方式对其进行验证：

Environment.GetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS")

调用如下：

private AnalyzeSentimentResponse AnalyzeSentiment(string statement)
{
    GrpcEnvironment.SetLogger(new MyLogger());

    var client = LanguageServiceClient.Create();
    var response = client.AnalyzeSentiment(new Document()
    {
        Content = statement,
        Type = Document.Types.Type.PlainText
    });

    return response;
}

无法弄清楚为什么当我运行它在我的本地机器上工作正常，而当它部署在服务器上时却失败了。上述服务器也没有任何限制。

结果：

GoogleCredential.GetApplicationDefaultAsync().Result.Underly‌ingCredential.GetTyp‌e()

是：

Google.Apis.Auth.OAuth2.ServiceAccountCredential

注意：服务器是我们自己的（WindowsServer 2012R2）

Answer 1

根据@JonSkeet 的建议，我将代码复制到控制台应用程序中并执行了调用。不幸的是，问题仍然存在。我接下来做的是将控制台应用程序移动到另一台服务器上，它在那里工作。

所以，这确实是服务器的问题，可能缺少某些功能（防火墙被禁用）。网络部门正在检查它，而我已经在另一台服务器上部署了我的 Web 应用程序。

更新：服务器出现问题，未安装某些必需的框架功能。该问题已通过将部署移动到另一台服务器得到解决。

Google NLP authentication/call 问题

Google NLP authentication/call issue

c#

asp.net-mvc

nlp

google-authentication

google-cloud-platform