From 73c047e43f079c5e1254731e1a35b3c44347b78f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=AE=B7=E5=8B=87?= <shyinyong@outlook.com>
Date: Thu, 10 Aug 2023 14:48:33 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E5=87=BD=E6=95=B0GetLocalIP?=
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---
 local_ip.go      | 33 +++++++++++++++++++++++++++++++++
 local_ip_test.go | 15 +++++++++++++++
 2 files changed, 48 insertions(+)
 create mode 100644 local_ip.go
 create mode 100644 local_ip_test.go

diff --git a/local_ip.go b/local_ip.go
new file mode 100644
index 0000000..aa84660
--- /dev/null
+++ b/local_ip.go
@@ -0,0 +1,33 @@
+package q5
+
+import (
+	"fmt"
+	"net"
+)
+
+func GetLocalIP() (string, error) {
+	interfaces, err := net.Interfaces()
+	if err != nil {
+		return "", err
+	}
+	for _, iface := range interfaces {
+		if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
+			continue
+		}
+		addrs, err := iface.Addrs()
+		if err != nil {
+			return "", err
+		}
+		for _, addr := range addrs {
+			ipnet, ok := addr.(*net.IPNet)
+			if !ok || ipnet.IP.IsLoopback() {
+				continue
+			}
+			if ipnet.IP.To4() != nil {
+				return ipnet.IP.String(), nil
+			}
+		}
+	}
+
+	return "", fmt.Errorf("无法获取本机有效的IP地址")
+}
diff --git a/local_ip_test.go b/local_ip_test.go
new file mode 100644
index 0000000..c4e5ca3
--- /dev/null
+++ b/local_ip_test.go
@@ -0,0 +1,15 @@
+package q5
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestGetLocalIP(t *testing.T) {
+	ip, err := GetLocalIP()
+	if err != nil {
+		// 错误处理
+		t.Errorf("local ip %v error:%s", ip, err)
+	}
+	fmt.Printf("local ip:[%s]\n", ip)
+}