feat: Add https-proxy-agent dependency and conditionally use it for fetch requests in the proxy route.

app/api/proxy/route.ts

@@ -1,4 +1,5 @@
 import { NextRequest, NextResponse } from 'next/server';
+import { HttpsProxyAgent } from 'https-proxy-agent';
 
 export async function GET(request: NextRequest) {
     const url = request.nextUrl.searchParams.get('url');
@@ -11,6 +12,10 @@ export async function GET(request: NextRequest) {
         // Beijing IP address to simulate request from China
         const chinaIP = '202.108.22.5';
 
+        // Configure proxy agent if environment variable is set
+        const proxyUrl = process.env.CHINA_PROXY_URL;
+        const agent = proxyUrl ? new HttpsProxyAgent(proxyUrl) : undefined;
+
         const response = await fetch(url, {
             headers: {
                 'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
@@ -18,6 +23,8 @@ export async function GET(request: NextRequest) {
                 'Client-IP': chinaIP,
                 'Referer': new URL(url).origin,
             },
+            // @ts-ignore - node-fetch types don't perfectly match Next.js fetch extension
+            agent: agent,
         });
 
         const contentType = response.headers.get('Content-Type');

package-lock.json

@@ -9,6 +9,7 @@
       "version": "0.1.0",
       "dependencies": {
         "@vercel/analytics": "^1.5.0",
+        "https-proxy-agent": "^7.0.6",
         "next": "16.0.3",
         "react": "19.2.0",
         "react-dom": "19.2.0",
@@ -2209,6 +2210,15 @@
         "acorn": "^6.0.0 || ^7.0.0 || ^8.0.0"
       }
     },
+    "node_modules/agent-base": {
+      "version": "7.1.4",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-7.1.4.tgz",
+      "integrity": "sha512-MnA+YT8fwfJPgBx3m60MNqakm30XOkyIoH1y6huTQvC0PwZG7ki8NacLBcrPbNoo8vEZy7Jpuk7+jMO+CUovTQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 14"
+      }
+    },
     "node_modules/ajv": {
       "version": "6.12.6",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
@@ -2771,7 +2781,6 @@
       "version": "4.4.3",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.3.tgz",
       "integrity": "sha512-RGwwWnwQvkVfavKVt22FGLw+xYSdzARwm0ru6DhTVA3umU5hZc28V3kO4stgYryrTlLpuvgI9GiijltAjNbcqA==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "ms": "^2.1.3"
@@ -3971,6 +3980,19 @@
         "hermes-estree": "0.25.1"
       }
     },
+    "node_modules/https-proxy-agent": {
+      "version": "7.0.6",
+      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-7.0.6.tgz",
+      "integrity": "sha512-vK9P5/iUfdl95AI+JVyUuIcVtd4ofvtrOr3HNtM2yxC9bnMbEdp3x01OhQNnjb8IJYi38VlTE3mBXwcfvywuSw==",
+      "license": "MIT",
+      "dependencies": {
+        "agent-base": "^7.1.2",
+        "debug": "4"
+      },
+      "engines": {
+        "node": ">= 14"
+      }
+    },
     "node_modules/ignore": {
       "version": "5.3.2",
       "resolved": "https://registry.npmjs.org/ignore/-/ignore-5.3.2.tgz",
@@ -4985,7 +5007,6 @@
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
       "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/nanoid": {

package.json

@@ -10,6 +10,7 @@
   },
   "dependencies": {
     "@vercel/analytics": "^1.5.0",
+    "https-proxy-agent": "^7.0.6",
     "next": "16.0.3",
     "react": "19.2.0",
     "react-dom": "19.2.0",