[英]Golang gin get client IP in ipv4 only
我在使用gin-gonic
時試圖獲取客戶端的 IP 地址,但有時它會給我我不想要的 IPv6 地址。
我當前的代碼如下所示:
web.POST("/path", func(c *gin.Context) {
ipAddr := c.ClientIP() // sometimes ipv4, sometimes ipv6
如何僅獲取 IPv4 地址?
作為參考,我只監聽 IPv4 地址:
server := &http.Server{
Handler: router,
}
l, err := net.Listen("tcp4", cfg.Listen)
if err != nil {
panic(err)
}
err = server.Serve(l)
以下是我收到的 IPv6 地址示例:
2402:800:6371:2f72:xxxx:bf67:3689:95df
2001:44b8:2169:c800:xxxx:c80a:b134:cc40
不確定這是否有幫助,但是下面的這個功能幫助我獲得了 IPAddress
func getClientIPByHeaders(req *http.Request) (ip string, err error) {
// Client could be behid a Proxy, so Try Request Headers (X-Forwarder)
ipSlice := []string{}
ipSlice = append(ipSlice, req.Header.Get("X-Forwarded-For"))
ipSlice = append(ipSlice, req.Header.Get("x-forwarded-for"))
ipSlice = append(ipSlice, req.Header.Get("X-FORWARDED-FOR"))
for _, v := range ipSlice {
log.Printf("debug: client request header check gives ip: %v", v)
if v != "" {
return v, nil
}
}
err = errors.New("error: Could not find clients IP address from the Request Headers")
return "", err
}
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