更新

backend/rpa_engine/douyin_im/dy_util.py

@@ -123,17 +123,24 @@ def generate_fake_webid(random_length=19):
     return random_str
 
 
-def generate_webid(auth=None, url=""):
+def generate_webid(auth=None, url="", user_agent=""):
     # 优先用已采集到的 web_id（避免每次发送都发起一次阻塞的 HTTP 请求，导致事件循环卡顿）
     cached = getattr(auth, "web_id", None) if auth is not None else None
     if cached:
         return str(cached)
     if url == "":
         url = "https://www.douyin.com/discover?modal_id=7376449060384935209"
+    # UA 优先级：显式参数 > auth.user_agent（from_im_session / perepare_auth 已带）> 全局默认。
+    # 必须与 a_bogus 签名、其余请求头使用同一个 UA，否则服务端重算失配 -> 7911。
+    ua = (
+        user_agent
+        or (getattr(auth, "user_agent", "") if auth is not None else "")
+        or DEFAULT_USER_AGENT
+    )
     try:
         from .auth import DouyinAuth
         headers = {
-            "User-Agent": DEFAULT_USER_AGENT,
+            "User-Agent": ua,
             "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8",
             "Accept-Language": "zh-CN,zh;q=0.9,en;q=0.8",
             "upgrade-insecure-requests": "1"