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我正在为Google Cloud Speech API使用 C# Google.Cloud.Speech.V1 .NET 客户端库版本 2.0.0 。

我想使用 OperationsClient 获取longRunningRecognize的操作状态：

var operationsClient = new OperationsClientBuilder { CredentialsPath = "GoogleServiceAccount.json" }.Build();
var operation = operationsClient.GetOperation("3637912932635009144");

但我得到了这个例外：

Grpc.Core.RpcException: Status(StatusCode=Cancelled, Detail="Received http2 header with status: 404")

我已经使用SpeechClient和StorageClient和ServiceAccount 凭据 （GoogleServiceAccount.json），一切正常。

我已经使用Google Cloud SDK Shell验证了操作，也很好：

gcloud ml speech operations describe 3637912932635009144

任何帮助将不胜感激。

这是堆栈跟踪：

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Grpc.Core.Internal.AsyncCall`2.UnaryCall(TRequest msg)
   at Grpc.Core.Calls.BlockingUnaryCall[TRequest,TResponse](CallInvocationDetails`2 call, TRequest req)
   at Grpc.Core.DefaultCallInvoker.BlockingUnaryCall[TRequest,TResponse](Method`2 method, String host, CallOptions options, TRequest request)
   at Grpc.Core.Interceptors.InterceptingCallInvoker.<BlockingUnaryCall>b__3_0[TRequest,TResponse](TRequest req, ClientInterceptorContext`2 ctx)
   at Grpc.Core.ClientBase.ClientBaseConfiguration.ClientBaseConfigurationInterceptor.BlockingUnaryCall[TRequest,TResponse](TRequest request, ClientInterceptorContext`2 context, BlockingUnaryCallContinuation`2 continuation)
   at Grpc.Core.Interceptors.InterceptingCallInvoker.BlockingUnaryCall[TRequest,TResponse](Method`2 method, String host, CallOptions options, TRequest request)
   at Google.LongRunning.Operations.OperationsClient.GetOperation(GetOperationRequest request, CallOptions options)
   at Google.Api.Gax.Grpc.ApiCall.GrpcCallAdapter`2.CallSync(TRequest request, CallSettings callSettings)
   at Google.Api.Gax.Grpc.ApiCallRetryExtensions.<>c__DisplayClass1_0`2.<WithRetry>b__0(TRequest request, CallSettings callSettings)
   at Google.Api.Gax.Grpc.ApiCall`2.<>c__DisplayClass10_0.<WithCallSettingsOverlay>b__1(TRequest req, CallSettings cs)
   at Google.Api.Gax.Grpc.ApiCall`2.Sync(TRequest request, CallSettings perCallCallSettings)
   at Google.LongRunning.OperationsClientImpl.GetOperation(GetOperationRequest request, CallSettings callSettings)
   at Google.LongRunning.OperationsClient.GetOperation(String name, CallSettings callSettings)
   at TranscripcionAPI.Controllers.WeatherForecastController.GetResult(String operationName) in C:\Users\andresfelipe\source\repos\TranscripcionAPI\TranscripcionAPI\TranscripcionAPI\Controllers\WeatherForecastController.cs:line 146
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1 回答 1

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我在 github 上发布了一个关于此的问题。

我以错误的方式使用图书馆。

查询操作的正确方法是：

var speech = new SpeechClientBuilder { CredentialsPath = "GoogleServiceAccount.json" }.Build();
var operation = speech.PollOnceLongRunningRecognize(operationName);

你可以在这里看到答案：

https://github.com/googleapis/google-cloud-dotnet/issues/4843

于 2020-04-09T20:39:11.293 回答