golang获取本地服务器IP
func ExternalIP() (net.IP, error) {
ifaces, err := net.Interfaces()
if err != nil {
return nil, err
}
for _, iface := range ifaces {
if iface.Flags&net.FlagUp == 0 {
continue // interface down
}
if iface.Flags&net.FlagLoopback != 0 {
continue // loopback interface
}
addrs, err := iface.Addrs()
if err != nil {
return nil, err
}
for _, addr := range addrs {
ip := GetIpFromAddr(addr)
if ip == nil {
continue
}
return ip, nil
}
}
return nil, errors.New("connected to the network?")
}
func GetIpFromAddr(addr net.Addr) net.IP {
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() {
return nil
}
ip = ip.To4()
if ip == nil {
return nil // not an ipv4 address
}
return ip
}
// 调用方法
ip, err := other.ExternalIP()
if err != nil {
fmt.Println(err)
}
fmt.Println(ip)