From 443cc77dbe758209d5871c04fd52fbe357a3adb2 Mon Sep 17 00:00:00 2001
From: Yun <yun@yun.ink>
Date: Sun, 3 May 2026 23:41:50 +0800
Subject: [PATCH] commit

---
 get_ip.go   | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 go.mod      |  3 +++
 ipx.go      | 48 ++++++++++++++++++++++++++++++++++++++++++
 ipx_test.go | 17 +++++++++++++++
 4 files changed, 128 insertions(+)
 create mode 100644 get_ip.go
 create mode 100644 go.mod
 create mode 100644 ipx.go
 create mode 100644 ipx_test.go

diff --git a/get_ip.go b/get_ip.go
new file mode 100644
index 0000000..5261c0e
--- /dev/null
+++ b/get_ip.go
@@ -0,0 +1,60 @@
+package tools
+
+import (
+	"net"
+	"net/http"
+	"strings"
+)
+
+// ClientIP 首先读取 X-Forwarded-For header 中用 , 分隔的第一个ip地址，
+// 如果这个地址不存在，就会从 X-Real-Ip header 中获取，如果还是不存在，
+// 说明流量并非是由反向代理转发而来，而是客户端直接请求服务，这时通过 http.Request.RemoteAddr 字段
+// 截取除去端口号的 ip 地址。
+func ClientPublicIp(r *http.Request) string {
+	var ip string
+	for _, ip = range strings.Split(r.Header.Get("X-Forwarded-For"), ",") {
+		ip = strings.TrimSpace(ip)
+		if ip != "" && !HasLocalIPaddr(ip) {
+			return ip
+		}
+	}
+
+	ip = strings.TrimSpace(r.Header.Get("X-Real-Ip"))
+	if ip != "" && !HasLocalIPaddr(ip) {
+		return ip
+	}
+
+	if ip, _, err := net.SplitHostPort(strings.TrimSpace(r.RemoteAddr)); err == nil {
+		if !HasLocalIPaddr(ip) {
+			return ip
+		}
+	}
+	return ""
+}
+
+// 判断是地址是否来自代理
+func RemoteIp(r *http.Request) string {
+	if ip, _, err := net.SplitHostPort(strings.TrimSpace(r.RemoteAddr)); err == nil {
+		return ip
+	}
+	return ""
+}
+
+// 检测IP地址字符串是否内网地址
+func HasLocalIPaddr(ip string) bool {
+	return HasLocalIP(net.ParseIP(ip))
+}
+
+// 检测IP地址是否内网地址
+// tcp/ip协议中，专门保留了三个IP地址区域作为私有地址，其地址范围如下：
+// 10.0.0.0/8：10.0.0.0～10.255.255.255
+// 172.16.0.0/12：172.16.0.0～172.31.255.255
+// 192.168.0.0/16：192.168.0.0～192.168.255.255
+func HasLocalIP(ip net.IP) bool {
+	// for _, network := range localNetworks {
+	// 	if network.Contains(ip) {
+	// 		return true
+	// 	}
+	// }
+	return ip.IsLoopback()
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..c980563
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module code.yun.ink/pkg/ipx
+
+go 1.20
diff --git a/ipx.go b/ipx.go
new file mode 100644
index 0000000..0371ca7
--- /dev/null
+++ b/ipx.go
@@ -0,0 +1,48 @@
+package ipx
+
+import (
+	"fmt"
+	"net"
+	"strings"
+)
+
+// TODO:不符合预期
+
+// 获取本机的公网IP
+func GetPublicIP() string {
+
+	conn, err := net.Dial("udp", "114.114.114.114:53")
+	if err != nil {
+		fmt.Println(err)
+		return ""
+	}
+
+	defer conn.Close()
+
+	remoteAddr := conn.RemoteAddr().(*net.UDPAddr)
+	fmt.Println("remote:", remoteAddr.String())
+	localAddr := conn.LocalAddr().(*net.UDPAddr)
+	fmt.Println("local:", localAddr.String())
+	ip := strings.Split(localAddr.String(), ":")[0]
+	return ip
+}
+
+// 获取本机的内网IP
+func GetLocalIP() string {
+	addrs, err := net.InterfaceAddrs()
+	if err != nil {
+		fmt.Println(err)
+		return ""
+	}
+	fmt.Println(addrs)
+	for _, address := range addrs {
+		// 检查ip地址判断是否回环地址
+		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
+			if ipnet.IP.To4() != nil {
+				ip := ipnet.IP.String()
+				return ip
+			}
+		}
+	}
+	return ""
+}
diff --git a/ipx_test.go b/ipx_test.go
new file mode 100644
index 0000000..b145b47
--- /dev/null
+++ b/ipx_test.go
@@ -0,0 +1,17 @@
+package ipx_test
+
+import (
+	"testing"
+
+	"code.yun.ink/pkg/ipx"
+)
+
+func TestPublicIP(t *testing.T) {
+	ip := ipx.GetPublicIP()
+	t.Log(ip)
+}
+
+func TestLocalIP(t *testing.T) {
+	ip := ipx.GetLocalIP()
+	t.Log(ip)
+}