func GetOutBoundIP() (ip string, err error) {
    conn, err := net.Dial("udp", "8.8.8.8:53")
    if err != nil {
        fmt.Println(err)
        return
    }
    localAddr := conn.LocalAddr().(*net.UDPAddr)
    ip = strings.Split(localAddr.String(), ":")[0]
    return
}

func GetOutBoundIP(ctx iris.Context) (ip string, err error) {
    resp, err := http.Get("http://myexternalip.com/raw")
    if err != nil {
        return "",err
    }
    defer resp.Body.Close()
    body, err := ioutil.ReadAll(resp.Body)
    ip = string(body)
    return
}

//通過iris的context內(nèi)部函數(shù)獲取請求頭部獲取ip
func GetOutBoundIP(ctx iris.Context) (string, error) {
?? ?//從請求頭部的X-REAL-IP獲取Ip
?? ?ip := ctx.Request().Header.Get("X-REAL-IP")
?? ?netIP := net.ParseIP(ip)
?? ?if netIP != nil {
?? ??? ?return ip, nil
?? ?}
?? ?//從請求頭部的X-FORWARDED-FOR獲取Ip
?? ?ips := ctx.Request().Header.Get("X-FORWARDED-FOR")
?? ?splitIps := strings.Split(ips, ",")
?? ?for _, ip := range splitIps {
?? ??? ?netIP := net.ParseIP(ip)
?? ??? ?if netIP != nil {
?? ??? ??? ?return ip, nil
?? ??? ?}
?? ?}
?? ?//從請求頭部的RemoteAddr獲取Ip
?? ?ip, _, err := net.SplitHostPort(ctx.Request().RemoteAddr)
?? ?if err != nil {
?? ??? ?return "", err
?? ?}
?? ?netIP = net.ParseIP(ip)
?? ?if netIP != nil {
?? ??? ?return ip, nil
?? ?}
?? ?return "", fmt.Errorf("正確ip獲取失敗")
}