From b63ed39eed0204d3bf6bb1210f0e5f2d29cf29d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=90=B3=E4=BD=A9=E5=BA=AD?= <petty09190@gmail.com>
Date: Fri, 1 Aug 2025 13:57:22 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9=20ip=20=E5=91=88=E7=8F=BE?=
 =?UTF-8?q?=E6=96=B9=E5=BC=8F?=
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---
 app/api/ip/route.ts | 33 +++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/app/api/ip/route.ts b/app/api/ip/route.ts
index ec9af33..b9ca328 100644
--- a/app/api/ip/route.ts
+++ b/app/api/ip/route.ts
@@ -8,7 +8,33 @@ export async function GET(request: NextRequest) {
   try {
     // 使用詳細的IP檢測功能
     const detailedInfo = getDetailedIpInfo(request);
-    const clientIp = detailedInfo.detectedIp;
+    let clientIp = detailedInfo.detectedIp;
+    
+    // 如果檢測到的是127.0.0.1，嘗試從請求頭獲取真實IP
+    if (clientIp === '127.0.0.1') {
+      // 檢查是否有代理轉發的真實IP
+      const forwardedFor = request.headers.get('x-forwarded-for');
+      if (forwardedFor) {
+        const ips = forwardedFor.split(',').map(ip => ip.trim());
+        for (const ip of ips) {
+          if (ip && ip !== '127.0.0.1' && ip !== '::1' && ip !== 'localhost') {
+            clientIp = ip;
+            break;
+          }
+        }
+      }
+      
+      // 檢查其他可能的IP來源
+      const realIp = request.headers.get('x-real-ip');
+      if (realIp && realIp !== '127.0.0.1') {
+        clientIp = realIp;
+      }
+      
+      const clientIpHeader = request.headers.get('x-client-ip');
+      if (clientIpHeader && clientIpHeader !== '127.0.0.1') {
+        clientIp = clientIpHeader;
+      }
+    }
     
     const allowedIps = process.env.ALLOWED_IPS || ''
     const enableIpWhitelist = process.env.ENABLE_IP_WHITELIST === 'true'
@@ -40,6 +66,8 @@ export async function GET(request: NextRequest) {
         host: request.headers.get('host'),
         referer: request.headers.get('referer'),
         userAgent: request.headers.get('user-agent'),
+        originalDetectedIp: detailedInfo.detectedIp,
+        finalDetectedIp: clientIp,
       },
       location: locationInfo,
       // 本地開發環境的特殊信息
@@ -49,7 +77,8 @@ export async function GET(request: NextRequest) {
           '在生產環境中部署後，IP檢測會更準確',
           '可以使用 ngrok 或類似工具進行外部測試',
           '檢查防火牆和網路配置',
-          '確認代理伺服器設置'
+          '確認代理伺服器設置',
+          '如果使用VPN，請檢查VPN設置'
         ]
       } : null
     })