Need help for gRPC sample implementation.

Start with AuthServer and ExtAuthService.check, then inspect the AuthorizationGrpc service entry point used by the sample. Run the provided curl request against the server and compare the requested path with the registered service and method. Done means the request reaches the intended check implementation instead of returning “Method not found: check”.

I have written the sample code for authorisation using gRPC service. I was unable to find an easy way to implement the service.

import io.grpc.Server;
import io.grpc.ServerBuilder;

public class AuthServer {

    public static void main(String[] args) throws Exception {
        // Create a new server to listen on port 8081
        Server server = ServerBuilder.forPort(5051)
            .addService(new ExtAuthService())
            .build();

        // Start the server
        server.start();

        // Server threads are running in the background.
        System.out
            .println("+++++++++++++++++++++++ gRPC server started ++++++++++++++++++++++++++++");
        // Don't exit the main thread. Wait until server is terminated.
        server.awaitTermination();
    }
}

The external authorisation service is follows.

import com.google.rpc.Status;
import io.envoyproxy.envoy.service.auth.v3.AuthorizationGrpc;
import io.envoyproxy.envoy.service.auth.v3.CheckRequest;
import io.envoyproxy.envoy.service.auth.v3.CheckResponse;
import io.envoyproxy.envoy.service.auth.v3.OkHttpResponse;
import io.grpc.stub.StreamObserver;

public class ExtAuthService extends AuthorizationGrpc.AuthorizationImplBase {

    @Override
    public void check (CheckRequest request, StreamObserver<CheckResponse> responseObserver) {

        System.out.println("++++++++++hit+++++++++++++++");

        System.out.println(request);

        CheckResponse response = CheckResponse.newBuilder()
            .setStatus(Status.newBuilder().build())
            .setOkResponse(OkHttpResponse.newBuilder().build())
            .build();

        // Use responseObserver to send a single response back
        responseObserver.onNext(response);

        // When you are done, you must call onCompleted.
        responseObserver.onCompleted();
    }
}

Request:

curl -X POST -vs -H "Authorization: Bearer foo" -H 'Content-Type: application/grpc' -H 'Accept: application/grpc' -H 'TE: trailers' -w "\n" --http2-prior-knowledge http://localhost:5051/check

Response:

* Connection state changed (MAX_CONCURRENT_STREAMS == 2147483647)!
< HTTP/2 200 
< content-type: application/grpc
< grpc-status: 12
< grpc-message: Method not found: check

What am I missing?