Round 3 fixes: cancelled polling, aggregator invalid_count, filter state, scheduler atomicity, HTTP exception handler, tests

app/api/routes/proxies.py

@@ -52,7 +52,7 @@ async def list_proxies(
 async def get_random_proxy(service: ProxyService = Depends(get_proxy_service)):
     proxy = await service.get_random_proxy()
     if not proxy:
-        raise ProxyNotFoundException("", 0)
+        raise ProxyPoolException("暂无可用代理", 404)
     return success_response("获取随机代理成功", format_proxy(proxy))
 
 
@@ -68,12 +68,8 @@ async def export_proxies(
 
     media_types = {"csv": "text/csv", "txt": "text/plain", "json": "application/json"}
 
-    async def generate():
-        async for chunk in service.export_proxies(fmt, protocol, limit):
-            yield chunk
-
     return StreamingResponse(
-        generate(),
+        service.export_proxies(fmt, protocol, limit),
         media_type=media_types[fmt],
         headers={"Content-Disposition": f"attachment; filename=proxies.{fmt}"},
     )