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
