mirror of
https://gitee.com/dromara/mayfly-go
synced 2025-11-02 23:40:24 +08:00
82 lines
1.8 KiB
Go
82 lines
1.8 KiB
Go
package netx
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import (
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"mayfly-go/pkg/logx"
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"net"
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"strings"
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"github.com/lionsoul2014/ip2region/binding/golang/xdb"
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)
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// GetAvailablePort 获取可用端口
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func GetAvailablePort() (int, error) {
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addr, err := net.ResolveTCPAddr("tcp", "localhost:0")
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if err != nil {
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return 0, err
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}
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l, err := net.ListenTCP("tcp", addr)
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if err != nil {
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return 0, err
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}
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defer func(l *net.TCPListener) {
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_ = l.Close()
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}(l)
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return l.Addr().(*net.TCPAddr).Port, nil
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}
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var (
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// ip2region数据所在路径，可在（https://gitee.com/lionsoul/ip2region/tree/master/data）处下载
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ip2RegionDbPath = "./ip2region.xdb"
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useIp2Region = true
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vectorIndex []byte
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)
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// 获取ip归属地信息
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func Ip2Region(ip string) string {
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if !useIp2Region {
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return ""
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}
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if vectorIndex == nil {
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// 1、从 dbPath 加载 VectorIndex 缓存，把下述 vIndex 变量全局到内存里面。
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vIndex, err := xdb.LoadVectorIndexFromFile(ip2RegionDbPath)
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// 第一次加载失败，则默认调整为不使用ip2Region
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if err != nil {
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logx.Errorf("failed to load ip2region vector index from `%s`: %s\n", ip2RegionDbPath, err)
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useIp2Region = false
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return ""
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}
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vectorIndex = vIndex
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}
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// 2、用全局的 vIndex 创建带 VectorIndex 缓存的查询对象。
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searcher, err := xdb.NewWithVectorIndex(xdb.IPv4, ip2RegionDbPath, vectorIndex)
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if err != nil {
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logx.Errorf("failed to create searcher with vector index: %s\n", err)
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return ""
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}
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defer searcher.Close()
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// do the search
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region, err := searcher.SearchByStr(ip)
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if err != nil {
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logx.Warnf("failed to SearchIP(%s): %s\n", ip, err)
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return ""
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}
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return region
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}
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func GetOutBoundIP() string {
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conn, err := net.Dial("udp", "8.8.8.8:53")
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if err != nil {
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return "0.0.0.0"
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}
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localAddr := conn.LocalAddr().(*net.UDPAddr)
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ip := strings.Split(localAddr.String(), ":")[0]
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return ip
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}
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