I have a GRPC server that exposes its services via reflection. From the Terminal grpcurl it as

> grpcurl -plaintext localhost:50051 list                                             

grpc.reflection.v1.ServerReflection
grpc.reflection.v1alpha.ServerReflection
... other services

How would I do the same programmatically from a client code? For instance

conn, err := grpc.NewClient(
    "localhost:50051",
    grpc.WithTransportCredentials(insecure.NewCredentials()),
)

I have a grpc connection above, how do I invoke the list method? I'm new to Go so appreciate any pointers.

I have a GRPC server that exposes its services via reflection. From the Terminal grpcurl it as

> grpcurl -plaintext localhost:50051 list                                             

grpc.reflection.v1.ServerReflection
grpc.reflection.v1alpha.ServerReflection
... other services

How would I do the same programmatically from a client code? For instance

conn, err := grpc.NewClient(
    "localhost:50051",
    grpc.WithTransportCredentials(insecure.NewCredentials()),
)

I have a grpc connection above, how do I invoke the list method? I'm new to Go so appreciate any pointers.

• go
• reflection

• This reeks of an X-Y problem to me: Why would you need to list the endpoints? You should have the message types, and a client in the generated code. The main use-case for grpc reflection (and tools like grpcurl) is debugging. – Elias Van Ootegem Commented Feb 16 at 13:30

1 Answer 1

try to dial with insecure.NewCredentials() for plaintext communication and then create a reflection client with reflectionpb.NewServerReflectionClient, send a ServerReflectionRequest with the ListServices method using ServerReflectionInfo. The response from the server should contain a list of available services, which you can print. This copies the behavior of grpcurl -plaintext localhost:50051 list but in client code.. Do you need an example code?