RNubla / gRPC-Learning

Learning gRPC with golang and python

This repo is for my own learning. It is to learn about gRPC between python and golang. This will help with iterop of the two language to comunicate with each other.

Command listed are only tested on windows.

https://stackoverflow.com/questions/64048132/proto-path-passed-empty-directory-name
protoc --proto_path=. --go_out=. ./addressBook.proto

To generate RPC for GoLang

protoc --proto_path=. --go_out=. --go-grpc_out=. ./helloWorld.proto

To generate RPC for Python

 python -m grpc_tools.protoc --proto_path=. --python_out=./services/hello-world --grpc_python_out=./services/hello-world ./helloWorld.proto

Thanks to Miki Tebeka for writing this article

Key takeaways

1. If you want go to call python functions you must generate rpc for both python and go.
2. To send data from go to python, we use the HelloWorldRequest() from Go RPC which will be caught by the python server on the request parameter.
3. In order for python to send back the data, HelloWorldResponse is used to return the response.
4. We also need to override the service Print so that we can manipulate the data that was sent from the client/go.
5. add_HelloWorldServicer_to_server(HelloWorldServer(), server) This code will add the service to the server

Reference

https://www.ardanlabs.com/blog/2020/06/python-go-grpc.html

https://grpc.io/docs/languages/go/basics/