From 77e79982fa979611c092e39ed5340e21c171443d Mon Sep 17 00:00:00 2001
From: Rogee <rogee@ipao.vip>
Date: Mon, 28 Sep 2026 11:57:28 +0800
Subject: [PATCH] =?UTF-8?q?fix(gateway):=20douyinpic=20=E5=9B=BE=E7=89=87?=
 =?UTF-8?q?=20fetch=20=E6=94=B9=20credentials=20omit=E2=80=94=E2=80=94?=
 =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E5=B0=81=E9=9D=A2=E7=BC=93=E5=AD=98=E5=85=A8?=
 =?UTF-8?q?=E9=87=8F=20502?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

douyinpic CDN 恒返回 Access-Control-Allow-Origin:'*'，跨站 fetch 带 credentials:'include'
按 CORS 规范必被拒（TypeError Failed to fetch），封面回填全部失败、creator_work_cover 落 0 行。
公共图片不需要 cookies，改 credentials:'omit' 后浏览器内 fetch 200，回填链路恢复。
验证：test_gateway 55 例全绿；实测 anon 浏览器 image fetch 200 image/jpeg；强制同步后
creator_work_cover 落 7/7（该账号全部作品），/works/:id/cover 正常输出 JPEG。
---
 browser_gateway/platform/douyin.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/browser_gateway/platform/douyin.py b/browser_gateway/platform/douyin.py
index 64b2a05..537d428 100644
--- a/browser_gateway/platform/douyin.py
+++ b/browser_gateway/platform/douyin.py
@@ -1547,7 +1547,9 @@ def fetch_douyin_image(self: object, alias: str, target: str) -> BrowserMediaRes
         result = cdp.evaluate(
             f"""(async()=>{{
               try {{
-                const r=await fetch({json.dumps(target)},{{credentials:'include',redirect:'error'}});
+                // douyinpic CDN 返回 Access-Control-Allow-Origin:'*'，跨站 fetch 不能带凭据，
+                // credentials:'include' 会直接 TypeError Failed to fetch；公共图片无需 cookies。
+                const r=await fetch({json.dumps(target)},{{credentials:'omit',redirect:'error'}});
                 if(!r.body)return {{status:r.status,content_type:r.headers.get('content-type')||'',body:'',too_large:false}};
                 const reader=r.body.getReader(), chunks=[]; let size=0;
                 for(;;){{const item=await reader.read();if(item.done)break;