package main

                                    import (
                                        "encoding/json"
                                        "encoding/xml"
                                        "fmt"
                                        "io/ioutil"
                                        "net/http"
                                    )

                                    const (
                                        URL   = "https://api.youripapi.com/ip/"
                                        TOKEN = "bd4c2bf9a38ab06f7cae88c9759ee172"
                                    )

                                    //----------------------------------
                                    // iP地址調用示例代碼
                                    //----------------------------------

                                    // xml struct
                                    type xmlinfo struct {
                                        Ret  string          `xml:"ret"`
                                        Ip   string          `xml:"ip"`
                                        Data locationxmlInfo `xml:"data"`
                                    }

                                    type locationxmlInfo struct {
                                        Country string `xml:"country"`
                                        Region  string `xml:"region"`
                                        City    string `xml:"city"`
                                        Isp     string `xml:"isp"`
                                        Zip     string `xml:"zip"`
                                        Zone    string `xml:zone`
                                    }

                                    //json struct
                                    type jsoninfo struct {
                                        Ret  string    `json:"ret"`
                                        Ip   string    `json:"ip"`
                                        Data [6]string `json:"data"`
                                    }

                                    func main() {
                                        ipLocation("8.8.8.8","xml")
                                    }

                                    func ipLocation(ip string,dataType string) {

                                        queryUrl := fmt.Sprintf("%s?ip=%s&datatype=%s",URL,ip,dataType)
                                        client := &http.Client{}
                                        reqest, err := http.NewRequest("GET",queryUrl,nil)

                                        if err != nil {
                                            fmt.Println("Fatal error ",err.Error())
                                        }

                                        reqest.Header.Add("token",TOKEN)
                                        response, err := client.Do(reqest)
                                        defer response.Body.Close()

                                        if err != nil {
                                            fmt.Println("Fatal error ",err.Error())
                                        }
                                        if response.StatusCode == 200 {
                                            bodyByte, _ := ioutil.ReadAll(response.Body)

                                            if dataType == "jsonp" {
                                                var info jsoninfo
                                                json.Unmarshal(bodyByte,&info)
                                                fmt.Println(info.Ip)
                                            } else if dataType == "xml" {
                                                var info xmlinfo
                                                xml.Unmarshal(bodyByte,&info)
                                                fmt.Println(info.Ip)
                                            }
                                        }

                                        return
                                    }