1. GO安装/配置

1.1 安装

  1. 解压
  2. (官网二进制 https://golang.google.cn/dl/)
  3. # tar -C /usr/local/ -zxvf go1.17.linux-amd64.tar.gz
  4. (yum安装)
  5. # yum install golang.x86_64 （1.15.5-1.el7）
  7. 环境变量
  8. # vim /etc/profile
  9. export GOBIN=/usr/local/go/bin
  10. export GOPATH=/root
  11. export PATH=$PATH:/usr/local/go/bin
  13. # source /etc/profile
  14. # echo $GOPATH
  15. # echo $GOBIN
  17. 样例
  18. # cd /root
  19. # vim helloworld.go
  20. package main 
  21. import ( "fmt" ) 
  22. func main() 
  23. { 
  24.     fmt.Println( "Hello world!" ) 
  25. }
  27. # go run helloworld.go

1.2 开启go module

  1. 1.11和1.12版本
  2. # GO111MODULE=on
  3. # GOPROXY=https://goproxy.io
  5. 1.13版本之后 （需要注意的是这种方式并不会覆盖之前的配置，有点坑，你需要先把系统的环境变量里面的给删掉再设置）
  6. # go env -w GO111MODULE=on
  7. # go env -w GOPROXY=https://goproxy.cn,https://goproxy.io,direct
  8. 配置文件位置
  9. # vim /root/.config/go/env
  10. GO111MODULE=on
  11. GOPROXY=https://goproxy.cn,https://goproxy.io,direct

1.3 go get使用

  1. 更新
  2. # go get -u

1.4 go mod基本操作

  1. 初始化一个moudle，模块名为你项目名
  2. # go mod init 模块名
  4. 删除错误或者不使用的modules
  5. # go mod tidy
  6. 自动下载到 $GOPATH/pkg/mod

2. grpc-gateway配置

2.1 grpc-c

  1. # git clone https://github.com/lixiangyun/grpc-c
  3. 根据README.txt编译、运行

2.2 grpc-gateway

  1. 零 mod file
  2. # go mod init github.com/grpc-ecosystem/grpc-gateway
  5. ① grpc service
  6. # cd test-grpc-gateway
  7. # vim proto/foo/foo.proto
  8. option go_package = "github.com/grpc-ecosystem/grpc-gateway/proto/foo";
  11. ② grpc compile/stubs
  12. C/C++
  13. # cd grpc-c/examples/
  14. # ./build.sh
  16. Go
  17. # protoc -I . \
  18.     --go_out . --go_opt paths=source_relative \
  19.     --go-grpc_out . --go-grpc_opt paths=source_relative \
  20.     proto/foo/foo.proto
  21. # ll proto/foo/foo_grpc.pb.go
  22. # ll proto/foo/foo.pb.go
  25. ③ 生成反向代理（通过 protoc-gen-grpc-gateway）
  26. # cd test-grpc-gateway
  27. 文件路径
  28. # mkdir -p proto/foo
  29. # vim proto/foo/config.yaml
  30. type: google.api.Service
  31. config_version: 3
  33. http:
  34.   rules:
  35.     - selector: foo.Greeter.SayHello
  36.       post: /v1/example/sayhello
  37.       body: "*"
  39. 生成反向代理
  40. # protoc -I . --grpc-gateway_out . \
  41.     --grpc-gateway_opt logtostderr=true \
  42.     --grpc-gateway_opt paths=source_relative \
  43.     --grpc-gateway_opt grpc_api_configuration=proto/foo/config.yaml \
  44.     proto/foo/foo.proto
  46. 非依赖情况增加选项：
  47. --grpc-gateway_opt standalone=true
  48. # ll proto/foo/foo.pb.gw.go
  51. ④ 生成 swagger.json
  52. # protoc -I . --openapiv2_out . \
  53.   --openapiv2_opt grpc_api_configuration=proto/foo/config.yaml \
  54.   proto/foo/foo.proto
  55. # ll proto/foo/foo.swagger.json
  58. ⑤ http反向代理
  59. package main
  61. import (
  62.   "context"
  63.   "flag"
  64.   "net/http"
  66.   "github.com/golang/glog"
  67.   "github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
  68.   "google.golang.org/grpc"
  70.   gw "github.com/grpc-ecosystem/grpc-gateway/proto/foo"  // Update
  71. )
  73. var (
  74.   // command-line options:
  75.   // gRPC server endpoint
  76.   grpcServerEndpoint = flag.String("grpc-server-endpoint",  "localhost:3000", "gRPC server endpoint")
  77. )
  79. func run() error {
  80.   ctx := context.Background()
  81.   ctx, cancel := context.WithCancel(ctx)
  82.   defer cancel()
  84.   // Register gRPC server endpoint
  85.   // Note: Make sure the gRPC server is running properly and accessible
  86.   mux := runtime.NewServeMux()
  87.   opts := []grpc.DialOption{grpc.WithInsecure()}
  88.   err := gw.RegisterGreeterHandlerFromEndpoint(ctx, mux,  *grpcServerEndpoint, opts)
  89.   if err != nil {
  90.     return err
  91.   }
  93.   // Start HTTP server (and proxy calls to gRPC server endpoint)
  94.   return http.ListenAndServe(":8090", mux)
  95. }
  97. func main() {
  98.   flag.Parse()
  99.   defer glog.Flush()
  101.   if err := run(); err != nil {
  102.     glog.Fatal(err)
  103.   }
  104. }
  107. ⑥ http测试
  108. gw启动
  109. # go run main.go
  110. # curl -X POST -k http://localhost:8090/v1/example/echo -d '{"name": " hello"}'

3. 参考文档