如何用 Golang 开发一个 IP 查询工具_Golang 网络请求与 JSON 数据解析

package main
<p>import (
"fmt"
"io"
"net/http"
)</p><p>func getPublicIP() (string, error) {
resp, err := http.Get("<a href="https://www.php.cn/link/f62cc9a5c2e8242b15ec3cd88f4e4afe">https://www.php.cn/link/f62cc9a5c2e8242b15ec3cd88f4e4afe</a>")
if err != nil {
return "", err
}
defer resp.Body.Close()</p><pre class='brush:php;toolbar:false;'>body, err := io.ReadAll(resp.Body)
if err != nil {
    return "", err
}

return string(body), nil

type IPLocation struct {
    IP      string `json:"ip"`
    Country string `json:"country"`
    Region  string `json:"region"`
    City    string `json:"city"`
}

func queryIPLocation(ipAddr string) (*IPLocation, error) {
    url := fmt.Sprintf("https://ipapi.co/%s/json/", ipAddr)
    resp, err := http.Get(url)
    if err != nil {
        return nil, err
    }
    defer resp.Body.Close()
<pre class='brush:php;toolbar:false;'>if resp.StatusCode != 200 {
    return nil, fmt.Errorf("API 错误: %d", resp.StatusCode)
}

var result IPLocation
err = json.NewDecoder(resp.Body).Decode(&result)
if err != nil {
    return nil, err
}

return &result, nil

func main() {
    location, err := queryIPLocation("8.8.8.8")
    if err != nil {
        fmt.Println("查询失败:", err)
        return
    }
    fmt.Printf("IP: %s\n国家: %s\n地区: %s\n城市: %s\n",
        location.IP, location.Country, location.Region, location.City)
}

client := &http.Client{
    Timeout: 10 * time.Second,
}
resp, err := client.Get("https://ipapi.co/8.8.8.8/json/")