diff --git a/assistant/src/module/assistant/proxy/http-proxy.ts b/assistant/src/module/assistant/proxy/http-proxy.ts
index 8e5036d..57d4101 100644
--- a/assistant/src/module/assistant/proxy/http-proxy.ts
+++ b/assistant/src/module/assistant/proxy/http-proxy.ts
@@ -81,16 +81,23 @@ export const httpProxy = (req: http.IncomingMessage, res: http.ServerResponse, p
     // @ts-ignore
     options.rejectUnauthorized = false; // 忽略证书错误
   }
-
+  if (res.headersSent) {
+    return;
+  }
   // 创建代理请求
   const proxyReq = httpProxy.request(options, (proxyRes) => {
-    // Modify the 'set-cookie' headers using rewriteCookieDomain
-    if (proxyRes.headers['set-cookie']) {
-      proxyRes.headers['set-cookie'] = proxyRes.headers['set-cookie'].map((cookie) => rewriteCookieDomain(cookie, cookieHost));
-      console.log('rewritten set-cookie:', proxyRes.headers['set-cookie']);
+    // 检查响应头是否已经发送
+    if (res.headersSent) {
+      return;
+    }
+    // 复制响应头并修改 'set-cookie'
+    const responseHeaders = { ...proxyRes.headers };
+    if (responseHeaders['set-cookie']) {
+      responseHeaders['set-cookie'] = responseHeaders['set-cookie'].map((cookie) => rewriteCookieDomain(cookie, cookieHost));
+      console.log('rewritten set-cookie:', responseHeaders['set-cookie']);
     }
     // 将代理服务器的响应头和状态码返回给客户端
-    res.writeHead(proxyRes.statusCode, proxyRes.headers);
+    res.writeHead(proxyRes.statusCode, responseHeaders);
     // 将代理响应流写入客户端响应
     proxyRes.pipe(res, { end: true });
   });