优化：查询攻略图片前校验URL是否存在

genshinuid.py

@@ -50,7 +50,10 @@ async def send_guide_pic(bot: HoshinoBot, ev: CQEvent):
                         name = i
         #name = str(event.get_message()).strip().replace(' ', '')[:-2]
         url = 'https://img.genshin.minigg.cn/guide/{}.jpg'.format(name)
-        await bot.send(ev, MessageSegment.image(url))
+        if httpx.head(url).status_code == 200:
+            await bot.send(ev, MessageSegment.image(url))
+        else:
+            return
     except Exception:
         logger.exception('获取建议失败。')