diff --git a/backend/app/routers/share.py b/backend/app/routers/share.py
index e4bd654..92dc0f0 100644
--- a/backend/app/routers/share.py
+++ b/backend/app/routers/share.py
@@ -30,8 +30,9 @@ def collect(req: Request, body: dict):
     entries = (body or {}).get("entries")
     if not reporter or not isinstance(entries, list):
         raise HTTPException(400, "格式不对：需要 instance 和 entries")
+    from app.engine import engine
     with database.session() as db:
-        accepted = share.collect(db, reporter, entries)
+        accepted = share.collect(db, reporter, entries, domains, engine.classifier)
         db.commit()
     return {"ok": True, "accepted": accepted}
 
diff --git a/backend/app/share.py b/backend/app/share.py
index 3b1b329..104f775 100644
--- a/backend/app/share.py
+++ b/backend/app/share.py
@@ -106,7 +106,10 @@ def export_domains(engine, db) -> list[dict]:
 
 
 def _valid_app(classifier, app: str) -> bool:
-    """应用白名单（debug20）：只收所有实例都认识的应用；自定义应用和编造的 ID 拒收"""
+    """应用白名单（debug20）：只收所有实例都认识的应用；自定义应用和编造的 ID 拒收。
+    classifier 传 None 时只按 ID 形状校验（测试直调用）"""
+    if classifier is None:
+        return bool(app) and len(app) <= 48 and app != "other" and not app.startswith("custom_")
     info = classifier.apps.get(app)
     return info is not None and not info.custom