fix: Fix aio resource leaks

scrape.py

@@ -1,4 +1,3 @@
-import asyncio
 import logging
 from abc import ABC, abstractmethod
 from typing import override
@@ -8,41 +7,22 @@ import httpx
 
 class TextScraper(ABC):
     def __init__(self):
-        self._client = httpx.AsyncClient(timeout=httpx.Timeout(5.0))
+        self._http_headers = {}
 
     async def _fetch_text(self, url: str) -> str:
         """Fetch the raw HTML content from the URL."""
-        response = None
         try:
-            response = await self._client.get(url)
+            async with httpx.AsyncClient(headers=self._http_headers) as client:
-            response.raise_for_status()
+                response = await client.get(url)
-            return response.text
+                response.raise_for_status()
+                return response.text
         except Exception:
             logging.warning(f"Failed to fetch text from {url}", exc_info=True)
             raise
-        finally:
-            if response:
-                await response.aclose()
 
     @abstractmethod
     async def get_content(self, url: str) -> str: ...
 
-    async def close(self):
-        """Close the underlying HTTP client."""
-        if self._client and not self._client.is_closed:
-            await self._client.aclose()
-
-    def __del__(self):
-        """Ensure the HTTP client is closed when the object is deleted."""
-        try:
-            loop = asyncio.get_event_loop()
-            if loop.is_running():
-                loop.create_task(self.close())
-            else:
-                loop.run_until_complete(self.close())
-        except Exception:
-            pass
-
 
 class Html2textScraper(TextScraper):
     @override
@@ -65,7 +45,7 @@ class JinaScraper(TextScraper):
     def __init__(self, api_key: str | None = None):
         super().__init__()
         if api_key:
-            self._client.headers.update({"Authorization": f"Bearer {api_key}"})
+            self._http_headers.update({"Authorization": f"Bearer {api_key}"})
 
     @override
     async def get_content(self, url: str) -> str: