buf connect-go 试用

golang 包含一个grpc-web 可以让浏览器运行grpc，但是是需要一些中间件工具的，connect-go 简化了处理，可以基于post 通过
http 协议就可以试用grpc 了

包含的特性

• 基于http 简单
• 多协议支持，包含了grpc，grpc-web

参考试用

• 初始化

  注意还需要配置环境变量

 

mkdir connect-apps

go mod init github.com/rongfengliang/go-connect-app

go install github.com/bufbuild/buf/cmd/buf@latest

go install github.com/fullstorydev/grpcurl/cmd/grpcurl@latest

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

go install github.com/bufbuild/connect-go/cmd/protoc-gen-connect-go@latest

• 项目接口

├── README.md

├── buf.gen.yaml // gen 定义包含了go 以及conenct go 插件使用

├── buf.work.yaml // workspace 定义

├── buf.yaml

├── go.mod

├── go.sum

├── main.go // 入口

└── proto

    └── userlogin

        └── v1

            └── userloign.proto // 服务定义

• 代码说明
  userloign.proto

 

syntax = "proto3";

 

package userlogin.v1;

 

option go_package = "github.com/rongfengliang/go-connect-app/pkg/userlogin/v1;userloginv1";

 

message LoginRequest{

    string username =1;

    string userpassword =2;

}

 

message LoginResponse{

    string token =1;

    int32 exprise =2;

}

 

service UserLoginService {

 

    rpc Login(LoginRequest) returns (LoginResponse){};

}

buf.gen.yaml

version: v1

directories:

  - proto

buf.gen.yaml

version: v1

plugins:

  - name: go

    out: pkg

    opt: paths=source_relative

  - name: connect-go

    out: pkg

    opt: paths=source_relative

main.go

package main

 

import (

    "context"

    "log"

    "net/http"

 

    "github.com/bufbuild/connect-go"

    userloginv1 "github.com/rongfengliang/go-connect-app/pkg/userlogin/v1"

    userloginv1connect "github.com/rongfengliang/go-connect-app/pkg/userlogin/v1/userloginv1connect"

    "golang.org/x/net/http2"

    "golang.org/x/net/http2/h2c"

)

 

type UserLogin struct{}

 

func (s *UserLogin) Login(

    ctx context.Context,

    req *connect.Request[userloginv1.LoginRequest],

) (*connect.Response[userloginv1.LoginResponse], error) {

    log.Println("Request headers: ", req.Header())

    log.Println("Request username: ", req.Msg.Username)

    res := connect.NewResponse(&userloginv1.LoginResponse{

        Token:   "demoapp",

        Exprise: 100,

    })

    res.Header().Set("userlogin-Version", "v1")

    return res, nil

}

 

func main() {

    userlogin := &UserLogin{}

    mux := http.NewServeMux()

    path, handler := userloginv1connect.NewUserLoginServiceHandler(userlogin)

    mux.Handle(path, handler)

    http.ListenAndServe(

        "0.0.0.0:8080",

        h2c.NewHandler(mux, &http2.Server{}),

    )

}

• 运行

buf generate 

go run main.go

• 测试

curl \

    --header "Content-Type: application/json" \

    --data '{"username": "dalong","userpassword":"demoapp"}' \

    http://localhost:8080/userlogin.v1.UserLoginService/Login

效果

 

 

说明

以上支持简单的试用，实际上buf connect go 的功能还是很多的，比较压缩，拦截器，路由。。。。

参考资料

https://connect.build/docs/web/getting-started/
https://github.com/bufbuild/connect-go
https://github.com/bufbuild/connect-web/tree/main/packages/connect-web
https://buf.build/blog/connect-a-better-grpc
https://github.com/rongfengliang/buf-connect-go-learning