官方文档:

https://go-zero.dev/cn/monolithic-service.html

系统环境:

linux debain

配置环境:

1. golang安装

2. go module配置

    go env -w GO111MODULE="on"
    go env -w GOPROXY=https://goproxy.cn
    go env -w GOMODCACHE=$GOPATH/pkg/mod

3. goctl安装

Go 1.16 及以后版本

GOPROXY=https://goproxy.cn/,direct go install github.com/zeromicro/go-zero/tools/goctl@latest
goctl -v

参考:
https://go-zero.dev/cn/goctl-install.html

4. protoc&protoc-gen-go安装

4.1 protoc安装

• 进入 protobuf release 页面，选择适合自己操作系统的压缩包文件下载,这里我选择protoc-3.19.4-linux-x86_64.zip
  https://github.com/protocolbuffers/protobuf/releases/download/v3.19.4/protoc-3.19.4-linux-x86_64.zip

• 解压出来后进入该目录下的bin目录中，将protoc直接copy到你的gopath/bin目录下即可。
  如$GOPATH/bin，这里不建议直接将其和系统的以下path放在一起。

• export PATH=$PATH:$GOPATH/bin 注意:$GOPATH/bin要加入到系统PATH中,如已加入可跳过

• protoc --version 验证结果

4.2 protoc-gen-go 安装

如果goctl 版本已经是1.2.1以后了，可以忽略此步骤。
GOPROXY=https://goproxy.cn/,direct go install google.golang.org/protobuf/cmd/protoc-gen-go@latest 

查看$GOPATH/bin下是否有protoc-gen-go即可

【注】：如果后续在使用goctl生成代码时候，遇到以下问题

protoc  --proto_path=/Users/seven/Developer/goenv/go-zero-looklook/app/usercenter/cmd/rpc/pb usercenter.proto --go_out=plugins=grpc:/Users/seven/Developer/goenv/go-zero-looklook/app/usercenter/cmd/rpc --go_opt=Musercenter.proto=././pb
goctl: generation error: unsupported plugin protoc-gen-go which installed from the following source:
google.golang.org/protobuf/cmd/protoc-gen-go, 
github.com/protocolbuffers/protobuf-go/cmd/protoc-gen-go;

Please replace it by the following command, we recommend to use version before v1.3.5:
go get -u github.com/golang/protobuf/protoc-gen-go
goctl version: 1.3.0 darwin/amd64

直接执行

$ GOPROXY=https://goproxy.cn/,direct go get -u github.com/golang/protobuf/protoc-gen-go 下载包
protoc-gen-go --version 查看版本

4.2 protoc-gen-go-grpc 安装

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

单体服务

创建greet服务

$ cd ~/go-zero-single_demo
$ go mod init go-zero-single_demo
$ goctl api new greet
$ go mod tidy

目录结构

• cd ~/go-zero-single_demo
• tree

服务的目录结构:

.
├── go.mod
├── go.sum
├── etc
│   └── greet-api.yaml
├── greet.api
├── greet.go
└── internal
    ├── config
    │   └── config.go
    ├── handler
    │   ├── greethandler.go
    │   └── routes.go
    ├── logic
    │   └── greetlogic.go
    ├── svc
    │   └── servicecontext.go
    └── types
        └── types.go

编写逻辑

vim go-zero-single_demo/greet/internal/logic/greetlogic.go

func (l *GreetLogic) Greet(req types.Request) (*types.Response, error) {
    return &types.Response{
        Message: "Hello go-zero""+req.Name,
    }, nil

}

启动并访问服务

• 启动服务

  $ cd ~/go-zero-single_demo/greet
  $ go run greet.go -f etc/greet-api.yaml

• 访问服务

   $ curl -i -X GET \
      http://localhost:8888/from/you

返回

  HTTP/1.1 200 OK
  Content-Type: application/json
  Date: Sun, 07 Feb 2021 04:31:25 GMT
  Content-Length: 27

  {"message":"Hello go-zero name:you"}

goland启动配置:

greet.go -f etc/greet-api.yaml

修改GET入参

去除options限制的入参值

1. 修改greet/greet.api 文件

type Request {
	Name string `path:"name,options=you|me"`
}

修改为

type Request {
	Name string `path:"name"`
}

2. 重新生成代码

  $ cd ~/go-zero-single_demo/greet
  $ goctl api go -api greet.api -dir . -style gozero

文件greet/internal/types/types.go 会被重新生成

3. 重启服务

  $ cd ~/go-zero-single_demo/greet
  $ go run greet.go -f etc/greet-api.yaml

• 访问服务

   $ curl -i -X GET \
      http://localhost:8888/from/haima

返回

{
  "message": "Hello go-zero name:haima"
}

添加post请求

1. 修改 greet/greet.api 文件

type RequestJson {
    Name string `json:"name"`
}

service greet-api {
	......
	
	@handler GreetPostHandler
	post /from/:name(RequestJson) returns (Response)
}

2. 重新生成代码

  $ cd ~/go-zero-single_demo/greet
  $ goctl api go -api greet.api -dir . -style gozero

会成生以下两个文件

• greet/internal/handler/greetposthandler.go
• greet/internal/logic/greetpostlogic.go

文件greet/internal/types/types.go里会自动添加如下代码

type RequestJson struct {
	Name string `json:"name"`
}

3. 修改greet/internal/logic/greetpostlogic.go文件

func (l *GreetPostLogic) GreetPost(req types.RequestJson) (resp *types.Response, err error) {
	// todo: add your logic here and delete this line
	return &types.Response{
		Message: "Hello go-zero name:"+req.Name,
	}, nil
}

4. 重启服务

  $ cd ~/go-zero-single_demo/greet
  $ go run greet.go -f etc/greet-api.yaml

5. post请求

新建test.http请求文件

###
GET http://127.0.0.1:8888/from/haima HTTP/1.1

###
POST http://127.0.0.1:8888/from/haima HTTP/1.1
Content-Type: application/json

{
   "name":"post haima"
}

返回

{
  "message": "Hello go-zero name:post haima"
}