func (s *Server) handleStream(t transport.ServerTransport, stream *transport.Stream, trInfo *traceInfo) { sm := stream.Method() if sm != "" && sm[0] == '/' { sm = sm[1:] } pos := strings.LastIndex(sm, "/") if pos == -1 { if err := t.WriteStatus(stream, codes.InvalidArgument, fmt.Sprintf("malformed method name: %q", stream.Method())); err != nil { grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err) } return } service := sm[:pos] method := sm[pos+1:] srv, ok := s.m[service] if !ok { if err := t.WriteStatus(stream, codes.Unimplemented, fmt.Sprintf("unknown service %v", service)); err != nil { grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err) } return } // Unary RPC or Streaming RPC? if md, ok := srv.md[method]; ok { s.processUnaryRPC(t, stream, srv, md, trInfo) return } if sd, ok := srv.sd[method]; ok { s.processStreamingRPC(t, stream, srv, sd, trInfo) return } if err := t.WriteStatus(stream, codes.Unimplemented, fmt.Sprintf("unknown method %v", method)); err != nil { grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err) } }