An Example of a unary client interceptor

UnaryClientinterceptor example.go

// ClientPingCounter is a UnaryClientInterceptor that will count the number of API calls on the Client side
func (pc *PingCounter) ClientPingCounter(ctx context.Context, method string, req interface{}, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
	pc.Pings++
	// Run regular gRPC call after
	// If you dont run the invoker, the gRPC call wont be sent to the server
	return invoker(ctx, method, req, reply, cc, opts...)
}