Protocol-buffers with golang

1.Install protoc

use apt

sudo apt install protoc

or download release from github direct, here i use ubuntu, for other platform, visit protocol

wget https://github.com/protocolbuffers/protobuf/releases/download/v3.19.4/protoc-3.19.4-linux-x86_64.zip -o ${HOME}/.local/bin

2.install protoc-gen-go

go install google.golang.org/protobuf/cmd/protoc-gen-go@latest

go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest

3.write example code

 1syntax = "proto3";
 2
 3option go_package = "proto/ecommerce";
 4package ecommerce;
 5
 6message ProductID { string value = 1; }
 7
 8message Product {
 9  string id = 1;
10  string name = 2;
11  string description = 3;
12}
13
14service ProductInfo {
15  rpc addProduct(Product) returns (ProductID);
16  rpc getProduct(ProductID) returns (Product);
17}

and put this in a proto folder

4.Gen proto for golang and grpc

1protoc --go_out=. --go_opt=paths=source_relative \
2    --go-grpc_out=. --go-grpc_opt=paths=source_relative proto/product_info.proto

Explains of this options

1. go_out define where to put your code
2. go_opt define go_out options paths=import mean create the full import path of option go_package in your proto file, and paths=source_relative will ignore this
3. module in go_opt will sub the prefix of you go_package option

Now you can use it in you project

Just a record, i'm still learning