Golang 服务器返回公网地址

系统管理员 2020-11-14 23:40 517阅读 0赞

gitee地址: [https://gitee.com/wang\_li/ReturnOutIP][https_gitee.com_wang_li_ReturnOutIP]

### 代码 ###

package main
    
    import (
        "flag"
        "fmt"
        "log"
        "net/http"
        "os"
        "strings"
        "time"
    )
    
    var (
        h bool
        LitenAddr string
        ListenRoute string
    )
    
    func init() {
        flag.BoolVar(&h,"h",false,"This help")
        flag.StringVar(&LitenAddr,"ListenAddr","0.0.0.0:93","Set http server listen address")
        flag.StringVar(&ListenRoute,"ListenRoute","/4u6385IP","Set http server listen Route")
    }
    
    func OutIPAddress(w http.ResponseWriter, r *http.Request) {
        slice01 := strings.Split(r.RemoteAddr,":")
        log.Println(time.Now(),"-- 4u6385IP --",r)
        fmt.Fprintf(w,slice01[0])
    }
    
    func main() {
        flag.Parse()
    
        if h {
            flag.Usage()
            os.Exit(0)
        }
    
        if ! strings.HasPrefix(ListenRoute,"/") {
            ListenRoute = "/" + ListenRoute
        }
    
        http.HandleFunc(ListenRoute,OutIPAddress)
    
        log.Println("Server running on http://" + LitenAddr + ListenRoute)
    
        s := &http.Server{
            Addr:    LitenAddr,
            ReadTimeout:10*time.Second,
            WriteTimeout:10*time.Second,
            MaxHeaderBytes:1<<20,
        }
        log.Fatal(s.ListenAndServe())
    }

打包为可执行文件

# go build -o ReturnOutIP

获取帮助

# ./ReturnOutIP -h
    Usage of ./ReturnOutIP:
      -ListenAddr string
            Set http server listen address (default "0.0.0.0:93")
      -ListenRoute string
            Set http server listen Route (default "/4u6385IP")
      -h    This help
    #

默认参数  
默认运行监听的端口为: 0.0.0.0:93 监听的http路由为 /4u6385IP

# ./ReturnOutIP
    2019/09/03 15:36:55 Server running on http://0.0.0.0:93/4u6385IP

指定监听的端口和路由

``` bash
    # ./ReturnOutIP -ListenAddr "0.0.0.0:95" -ListenRoute '/OutIP'
    2019/09/03 15:41:24 Server running on http://0.0.0.0:95/OutIP
    ```

[https_gitee.com_wang_li_ReturnOutIP]: https://gitee.com/wang_li/ReturnOutIP