public override async Task <InvocationResponse <TResponse> > InvokeMethodWithResponseAsync <TRequest, TResponse>(
string appId,
string methodName,
TRequest data,
HttpInvocationOptions httpOptions = default,
CancellationToken cancellationToken = default)
{
ArgumentVerifier.ThrowIfNull(appId, nameof(appId));
ArgumentVerifier.ThrowIfNull(methodName, nameof(methodName));
var request = new InvocationRequest <TRequest>
{
AppId = appId,
MethodName = methodName,
Body = data,
HttpOptions = httpOptions,
};
var invokeResponse = await this.MakeInvokeRequestAsyncWithResponse <TRequest, TResponse>(request, false, cancellationToken);
return(invokeResponse);
}
private async Task<InvocationResponse<TResponse>> MakeInvokeRequestAsyncWithResponse<TRequest, TResponse>(
InvocationRequest<TRequest> request,
bool useRaw,
CancellationToken cancellationToken = default)
{
Any serializedData = null;
if (request.Body != null)
{
if (useRaw)
{
// User has passed in raw bytes
var requestBytes = (byte[])(object)(request.Body);
serializedData = new Any { Value = ByteString.CopyFrom(requestBytes), TypeUrl = typeof(byte[]).FullName };
}
else
{
serializedData = TypeConverters.ToAny(request.Body, this.jsonSerializerOptions);
}
}
try
{
var invokeResponse = new InvocationResponse<TResponse>();
Autogenerated.InvokeServiceRequest invokeRequest;
CallOptions callOptions;
(invokeRequest, callOptions) = this.MakeInvokeRequestAsync(request.AppId, request.MethodName, serializedData, request.HttpExtension, cancellationToken);
var grpcCall = client.InvokeServiceAsync(invokeRequest, callOptions);
var response = await grpcCall.ResponseAsync;
var responseHeaders = await grpcCall.ResponseHeadersAsync;
var trailers = grpcCall.GetTrailers();
var grpcStatus = grpcCall.GetStatus();
var headers = grpcCall.ResponseHeadersAsync.Result.ToDictionary(kv => kv.Key, kv => kv.ValueBytes);
if (useRaw)
{
// User wants to receive raw bytes
var responseBytes = new byte[response.Data.Value.Length];
response.Data.Value?.CopyTo(responseBytes, 0);
invokeResponse.Body = (TResponse)(response.Data.Value.IsEmpty ? default : (object)(responseBytes));
}
else
{
invokeResponse.Body = response.Data.Value.IsEmpty ? default : TypeConverters.FromAny<TResponse>(response.Data, this.jsonSerializerOptions);
}
invokeResponse.Headers = headers;
invokeResponse.Trailers = grpcCall.GetTrailers().ToDictionary(kv => kv.Key, kv => kv.ValueBytes);
if (headers.TryGetValue(DaprHttpStatusHeader, out var httpStatus))
{
invokeResponse.HttpStatusCode = (HttpStatusCode)System.Enum.Parse(typeof(HttpStatusCode), Encoding.UTF8.GetString(httpStatus, 0, httpStatus.Length));
invokeResponse.ContentType = Constants.ContentTypeApplicationJson;
}
else
{
// Response is grpc
invokeResponse.GrpcStatusInfo = new GrpcStatusInfo(grpcStatus.StatusCode, grpcStatus.Detail);
invokeResponse.ContentType = Constants.ContentTypeApplicationGrpc;
}
return invokeResponse;
}
catch (RpcException ex)
{
var invokeErrorResponse = new InvocationResponse<byte[]>();
var entry = ex.Trailers.Get(GrpcStatusDetails);
if (entry != null)
{
var status = Google.Rpc.Status.Parser.ParseFrom(entry.ValueBytes);
foreach (var detail in status.Details)
{
if (Google.Protobuf.WellKnownTypes.Any.GetTypeName(detail.TypeUrl) == GrpcErrorInfoDetail)
{
var rpcError = detail.Unpack<Google.Rpc.ErrorInfo>();
var grpcStatusCode = (StatusCode)status.Code;
string innerHttpErrorCode = null;
string innerHttpErrorMessage = null;
rpcError.Metadata.TryGetValue(DaprErrorInfoHttpCodeMetadata, out innerHttpErrorCode);
rpcError.Metadata.TryGetValue(DaprErrorInfoHttpErrorMetadata, out innerHttpErrorMessage);
if(innerHttpErrorCode != null || innerHttpErrorMessage != null)
{
// Response returned by Http server
invokeErrorResponse.HttpStatusCode = (HttpStatusCode)(Convert.ToInt32(innerHttpErrorCode));
invokeErrorResponse.Body = Encoding.UTF8.GetBytes(innerHttpErrorMessage);
}
else
{
// Response returned by gRPC server
invokeErrorResponse.GrpcStatusInfo = new GrpcStatusInfo(grpcStatusCode, status.Message);
}
break;
}
}
}
throw new InvocationException($"Exception while invoking {request.MethodName} on appId:{request.AppId}", ex, invokeErrorResponse);
}
}