/
ip.go
166 lines (145 loc) · 3.2 KB
/
ip.go
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package util
import (
"errors"
"fmt"
"io/ioutil"
"net"
"net/http"
"strconv"
"strings"
)
// GetExternalIP 获取本服务器的外网IP
func GetExternalIP() (string, error) {
resp, err := http.Get("https://ipw.cn/api/ip/myip")
if err != nil {
return "", err
}
defer resp.Body.Close()
resultBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
return strings.TrimSpace(string(resultBytes)), nil
}
// GetClientPublicIP 尽最大努力实现获取客户端公网 IP 的算法。
// 解析 X-Real-IP 和 X-Forwarded-For 以便于反向代理(nginx 或 haproxy)可以正常工作。
func GetClientPublicIP(r *http.Request) string {
var ip string
for _, ip = range strings.Split(r.Header.Get("X-Forwarded-For"), ",") {
ip = strings.TrimSpace(ip)
if ip != "" {
return ip
}
}
ip = strings.TrimSpace(r.Header.Get("X-Real-Ip"))
if ip != "" {
return ip
}
if ip, _, err := net.SplitHostPort(strings.TrimSpace(r.RemoteAddr)); err == nil {
return ip
}
return ""
}
// GetIPAddress 通过IP获取地址
func GetIPAddress(ip string) (province string, city string, err error) {
var resp *http.Response
resp, err = http.Get(fmt.Sprintf("https://restapi.amap.com/v3/ip?key=7e30415c3e9ce73d93d20189b9539be8&ip=%s", ip))
if err != nil {
return
}
if resp.StatusCode != http.StatusOK {
err = errors.New("查询地址失败!")
return
}
var data []byte
data, err = ioutil.ReadAll(resp.Body)
if err != nil {
return
}
var resultMap map[string]interface{}
resultMap, err = JsonToMap(string(data))
if err != nil {
return
}
provinceObj := resultMap["province"]
cityObj := resultMap["city"]
if provinceObj != nil && cityObj != nil {
var ok bool
province, ok = provinceObj.(string)
if !ok {
return
}
city, ok = cityObj.(string)
if !ok {
return
}
return
}
return
}
// GetIntranetIP 获取本机IP
func GetIntranetIP() (ips []string, err error) {
ips = make([]string, 0)
ifaces, e := net.Interfaces()
if e != nil {
return ips, e
}
for _, iface := range ifaces {
if iface.Flags&net.FlagUp == 0 {
continue // interface down
}
if iface.Flags&net.FlagLoopback != 0 {
continue // loopback interface
}
// ignore docker and warden bridge
if strings.HasPrefix(iface.Name, "docker") || strings.HasPrefix(iface.Name, "w-") {
continue
}
addrs, e := iface.Addrs()
if e != nil {
return ips, e
}
for _, addr := range addrs {
var ip net.IP
switch v := addr.(type) {
case *net.IPNet:
ip = v.IP
case *net.IPAddr:
ip = v.IP
}
if ip == nil || ip.IsLoopback() {
continue
}
ip = ip.To4()
if ip == nil {
continue // not an ipv4 address
}
ipStr := ip.String()
if IsIntranet(ipStr) {
ips = append(ips, ipStr)
}
}
}
return ips, nil
}
// IsIntranet IsIntranet
func IsIntranet(ipStr string) bool {
if strings.HasPrefix(ipStr, "10.") || strings.HasPrefix(ipStr, "192.168.") {
return true
}
if strings.HasPrefix(ipStr, "172.") {
// 172.16.0.0-172.31.255.255
arr := strings.Split(ipStr, ".")
if len(arr) != 4 {
return false
}
second, err := strconv.ParseInt(arr[1], 10, 64)
if err != nil {
return false
}
if second >= 16 && second <= 31 {
return true
}
}
return false
}