http://colobu.com/2017/04/06/dive-into-gRPC-streaming/
grpcurl
grpcurl ui - delivery
grpcurl -plaintext -max-time 5 -d '{"name": "abcde123 hahaha"}' 127.0.0.1:57613 helloworld.Greeter/SayHello
/Applications/delivery.app/Contents/Resources/bin/darwin/grpcurl -plaintext -max-time 5 -d '{
"id": "aaa",
"name": "222",
"description": "222",
"price": 33330
}' 127.0.0.1:59777 ecommerce.ProductInfo/addProduct
https://github.com/grpc-ecosystem/awesome-grpc
https://github.com/fullstorydev/grpcui [ webui ] https://github.com/ktr0731/evans https://github.com/uw-labs/bloomrpc
grpcui -plaintext 127.0.0.1:49390