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150
konabot/plugins/fx_process/image_storage.py
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150
konabot/plugins/fx_process/image_storage.py
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import asyncio
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from dataclasses import dataclass
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from hashlib import md5
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import time
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from nonebot import logger
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from nonebot_plugin_apscheduler import driver
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from konabot.common.path import DATA_PATH
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import os
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from PIL import Image
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IMAGE_PATH = DATA_PATH / "temp" / "images"
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@dataclass
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class ImageResource:
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name: str
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expire: int
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@dataclass
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class StorageImage:
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name: str
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resources: dict[str,
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dict[str,ImageResource]] # {群号: {QQ号: ImageResource}}
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class ImageStorager:
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images_pool: dict[str,StorageImage] = {}
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max_storage: int = 10 * 1024 * 1024 # 最大存储10MB
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max_image_count: int = 200 # 最大存储图片数量
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@staticmethod
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def init():
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if not IMAGE_PATH.exists():
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IMAGE_PATH.mkdir(parents=True, exist_ok=True)
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@staticmethod
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def delete_path_image(name: str):
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resource_path = IMAGE_PATH / name
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if resource_path.exists():
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os.remove(resource_path)
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@classmethod
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async def clear_expire_image(cls):
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# 清理过期的图片资源，将未被删除的放入列表中，如果超过最大数量则删除最早过期的
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remaining_images = []
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current_time = time.time()
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for name, storage_image in list(ImageStorager.images_pool.items()):
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for group_id, resources in list(storage_image.resources.items()):
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for qq_id, resource in list(resources.items()):
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if resource.expire < current_time:
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del storage_image.resources[group_id][qq_id]
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cls.delete_path_image(name)
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else:
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remaining_images.append((name, group_id, qq_id, resource.expire))
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if not storage_image.resources:
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del ImageStorager.images_pool[name]
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# 如果剩余图片超过最大数量，按过期时间排序并删除最早过期的
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if len(remaining_images) > ImageStorager.max_image_count:
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remaining_images.sort(key=lambda x: x[3]) # 按过期时间排序
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to_delete = len(remaining_images) - ImageStorager.max_image_count
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for i in range(to_delete):
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name, group_id, qq_id, _ = remaining_images[i]
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resource = ImageStorager.images_pool[name].resources[group_id][qq_id]
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del ImageStorager.images_pool[name].resources[group_id][qq_id]
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cls.delete_path_image(name)
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@classmethod
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def _add_to_pool(cls, image: bytes, name: str, group_id: str, qq_id: str, expire: int = 36000):
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expire_time = time.time() + expire
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if name not in cls.images_pool:
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cls.images_pool[name] = StorageImage(name=name,resources={})
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if group_id not in cls.images_pool[name].resources:
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cls.images_pool[name].resources[group_id] = {}
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cls.images_pool[name].resources[group_id][qq_id] = ImageResource(name=name, expire=expire_time)
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@classmethod
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def save_image(cls, image: bytes, name: str, group_id: str, qq_id: str) -> None:
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"""
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以哈希值命名保存图片，并返回图片资源信息
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"""
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# 检测图像大小，不得超过 10 MB
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if len(image) > cls.max_storage:
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raise ValueError("图片大小超过 10 MB 限制")
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hash_name = md5(image).hexdigest()
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ext = os.path.splitext(name)[1]
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file_name = f"{hash_name}{ext}"
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full_path = IMAGE_PATH / file_name
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with open(full_path, "wb") as f:
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f.write(image)
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# 将文件写入 images_pool
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cls._add_to_pool(image, file_name, group_id, qq_id)
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@classmethod
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def load_image(cls, name: str, group_id: str, qq_id: str) -> Image:
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if name not in cls.images_pool:
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return None
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if group_id not in cls.images_pool[name].resources:
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return None
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# 寻找对应 QQ 号 的资源，如果没有就返回相同群下的第一个资源
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if qq_id not in cls.images_pool[name].resources[group_id]:
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first_qq_id = next(iter(cls.images_pool[name].resources[group_id]))
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qq_id = first_qq_id
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resource = cls.images_pool[name].resources[group_id][qq_id]
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resource_path = IMAGE_PATH / resource.name
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return Image.open(resource_path)
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class ImageStoragerManager:
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def __init__(self, interval: int = 300): # 默认 5 分钟执行一次
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self.interval = interval
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self._clear_task = None
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self._running = False
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async def start_auto_clear(self):
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"""启动自动任务"""
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self._running = True
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self._clear_task = asyncio.create_task(self._auto_clear_loop())
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logger.info(f"自动清理任务已启动，间隔: {self.interval}秒")
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async def stop_auto_clear(self):
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"""停止自动清理任务"""
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if self._clear_task:
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self._running = False
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self._clear_task.cancel()
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try:
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await self._clear_task
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except asyncio.CancelledError:
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pass
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logger.info("自动清理任务已停止")
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else:
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logger.warning("没有正在运行的自动清理任务")
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async def _auto_clear_loop(self):
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"""自动清理循环"""
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while self._running:
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try:
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await asyncio.sleep(self.interval)
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await ImageStorager.clear_expire_image()
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except asyncio.CancelledError:
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break
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except Exception as e:
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logger.error(f"定时清理失败: {e}")
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image_manager = ImageStoragerManager(interval=300) # 每5分钟清理一次
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@driver.on_startup
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async def init_image_storage():
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ImageStorager.init()
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# 启用定时任务清理过期图片
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await image_manager.start_auto_clear()
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