将头像缓存同步改为系统定时任务
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liuwei
@@ -35,7 +35,6 @@ class ContactManager:
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_avatar_manifest: Dict[str, Dict[str, str]] = {}
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_avatar_sync_state_lock = threading.Lock()
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_avatar_sync_running = False
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_avatar_sync_pending = False
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# 定义公共好友列表
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_PUBLIC_FRIENDS = {
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'fmessage': '朋友推荐消息',
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@@ -88,60 +87,61 @@ class ContactManager:
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"gender": gender}
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chatroom_members: 所有的群成员昵称信息
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"""
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# 这些内存态会被后台头像同步线程读取，因此更新时统一加锁，
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# 避免“刷新通讯录”和“后台下载头像”并发时出现字典遍历被修改的问题。
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# 这些内存态会被定时任务与按需补下载逻辑读取，因此更新时统一加锁，
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# 避免“刷新通讯录”和“后台头像处理”并发时出现字典遍历被修改的问题。
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with self._avatar_cache_lock:
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self._contacts = contacts
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self._friends = friends
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self._head_images = head_imgs
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self._group_members = chatroom_members
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# 头像缓存同步改成后台异步触发：
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# 1. set_contacts 常出现在“刷新通讯录”主链路里，若同步下载头像会明显阻塞系统；
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# 2. 这里改成只提交后台任务，主线程先把联系人数据更新完立即返回；
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# 3. 后台线程会基于当前最新 head_images 做增量同步，不会丢掉头像更新。
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self._schedule_avatar_cache_sync(reason="set_contacts")
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# 联系人刷新链路不再主动触发批量头像同步：
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# 1. 用户明确希望降低启动与刷新通讯录时的瞬时压力；
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# 2. 头像全量/增量检查统一交给系统定时任务每小时处理；
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# 3. 若后台页面提前访问某个头像，接口仍会走单头像按需补下载，不影响使用。
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self._logger.info(f"联系人信息已更新，共 {len(contacts)} 个联系人")
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# 分类联系人
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self._classify_contacts()
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def _schedule_avatar_cache_sync(self, reason: str = "unknown") -> None:
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"""提交头像缓存后台同步任务，避免在主链路里同步下载头像。"""
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def run_scheduled_avatar_cache_sync(self, reason: str = "system_job") -> Dict[str, int | str | bool]:
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"""供系统定时任务调用的头像缓存同步入口。
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设计说明：
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1. 启动、登录、刷新通讯录时都不再主动批量下载头像；
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2. 统一由系统任务定时做“manifest 与当前头像 URL”差异检查；
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3. 若某一小时任务尚未跑完，下一次重入会直接跳过，避免并发重复下载。
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"""
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with self._avatar_sync_state_lock:
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self._avatar_sync_pending = True
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if self._avatar_sync_running:
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self._logger.debug(f"头像缓存后台同步已在执行，合并本次请求 reason={reason}")
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return
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self._logger.debug(f"头像缓存定时同步跳过 reason={reason} busy=1")
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return {
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"success": False,
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"skipped": True,
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"reason": "busy",
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}
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self._avatar_sync_running = True
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worker = threading.Thread(
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target=self._avatar_sync_worker,
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args=(reason,),
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daemon=True,
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name="contact-avatar-sync",
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try:
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self._logger.info(f"头像缓存定时同步开始 reason={reason}")
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result = self._sync_avatar_cache()
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self._logger.info(
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"头像缓存定时同步完成 "
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f"reason={reason} "
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f"total_head_images={result.get('total_head_images', 0)} "
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f"downloaded={result.get('downloaded', 0)} "
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f"replaced={result.get('replaced', 0)} "
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f"failed={result.get('failed', 0)} "
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f"removed_contacts={result.get('removed_contacts', 0)} "
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f"removed_files={result.get('removed_files', 0)}"
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)
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worker.start()
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self._logger.debug(f"头像缓存后台同步已提交 reason={reason}")
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def _avatar_sync_worker(self, initial_reason: str) -> None:
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"""串行消费头像缓存同步请求，确保高频更新时只跑最新一轮。"""
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trigger_reason = initial_reason
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while True:
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return {
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"success": True,
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"skipped": False,
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"reason": reason,
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**result,
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}
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finally:
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with self._avatar_sync_state_lock:
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self._avatar_sync_pending = False
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try:
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self._logger.debug(f"头像缓存后台同步开始 reason={trigger_reason}")
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self._sync_avatar_cache()
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except Exception as exc:
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self._logger.error(f"头像缓存后台同步失败 reason={trigger_reason}: {exc}")
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with self._avatar_sync_state_lock:
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# 如果在本轮执行期间又收到了新的同步请求，就立刻再跑一轮，
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# 这样可以把多次 set_contacts/update_head_image 合并成少量批处理。
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if self._avatar_sync_pending:
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trigger_reason = "pending_update"
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continue
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self._avatar_sync_running = False
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self._logger.debug("头像缓存后台同步结束")
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break
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def _init_avatar_cache(self) -> None:
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"""初始化头像缓存目录和 manifest。"""
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@@ -288,22 +288,35 @@ class ContactManager:
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response.close()
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return str(target_path)
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def _sync_avatar_cache(self) -> None:
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def _sync_avatar_cache(self) -> Dict[str, int]:
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"""按当前头像 URL 增量同步本地缓存。"""
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with self._avatar_cache_lock:
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head_images_snapshot = dict(self._head_images)
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if not head_images_snapshot:
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return
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return {
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"total_head_images": 0,
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"manifest_entries": len(self._avatar_manifest),
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"reuse": 0,
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"downloaded": 0,
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"replaced": 0,
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"failed": 0,
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"removed_contacts": 0,
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"removed_files": 0,
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"orphan_deleted": 0,
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"tmp_deleted": 0,
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}
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manifest_changed = False
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# 统计字段用于打 debug 汇总日志，方便观察“初始化第一批头像”时到底发生了什么：
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# 1. reuse_count 表示命中本地缓存、无需下载；
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# 2. download_count 表示本轮真正新增或重拉的头像数量；
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# 3. replaced_count 表示头像 URL 变更导致发生了“新旧替换”；
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# 4. removed_contact_count / removed_file_count 表示联系人消失后同步移除了多少记录和文件。
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# 4. failed_count 表示本轮有多少头像因为网络或写盘失败未能更新；
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# 5. removed_contact_count / removed_file_count 表示联系人消失后同步移除了多少记录和文件。
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reuse_count = 0
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download_count = 0
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replaced_count = 0
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failed_count = 0
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removed_contact_count = 0
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removed_file_count = 0
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for wxid, avatar_url in head_images_snapshot.items():
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@@ -320,6 +333,7 @@ class ContactManager:
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continue
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downloaded_path = self._download_avatar_to_cache(wxid, remote_url)
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if not downloaded_path:
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failed_count += 1
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self._logger.debug(f"头像缓存同步跳过 wxid={wxid} reason=download_failed")
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continue
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with self._avatar_cache_lock:
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@@ -364,11 +378,24 @@ class ContactManager:
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f"reuse={reuse_count} "
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f"downloaded={download_count} "
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f"replaced={replaced_count} "
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f"failed={failed_count} "
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f"removed_contacts={removed_contact_count} "
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f"removed_files={removed_file_count} "
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f"orphan_deleted={cleanup_stats.get('orphan_deleted', 0)} "
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f"tmp_deleted={cleanup_stats.get('tmp_deleted', 0)}"
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)
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return {
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"total_head_images": len(active_wxids),
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"manifest_entries": len(self._avatar_manifest),
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"reuse": reuse_count,
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"downloaded": download_count,
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"replaced": replaced_count,
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"failed": failed_count,
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"removed_contacts": removed_contact_count,
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"removed_files": removed_file_count,
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"orphan_deleted": cleanup_stats.get("orphan_deleted", 0),
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"tmp_deleted": cleanup_stats.get("tmp_deleted", 0),
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}
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def get_cached_head_image_path(self, wxid: str) -> str:
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"""返回头像缓存本地路径，若缓存不存在则返回空字符串。"""
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@@ -553,11 +580,10 @@ class ContactManager:
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"""
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with self._avatar_cache_lock:
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self._head_images.update({wxid: head_image})
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# 单头像更新也改成后台异步：
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# 1. 入群欢迎、成员变更等实时链路不能被头像下载阻塞；
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# 2. 这里只更新最新远端 URL，并触发后台增量同步；
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# 3. 若页面提前访问该头像，/api/avatar 仍会按需补下载，不影响可用性。
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self._schedule_avatar_cache_sync(reason=f"update_head_image:{wxid}")
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# 单头像更新链路同样不再主动拉取文件：
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# 1. 成员变更、欢迎语等实时场景优先保证主流程轻量；
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# 2. 当前这里只维护最新头像 URL，批量下载统一交给定时任务；
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# 3. 若后台刚好访问这个联系人头像，仍可通过按需补下载拿到本地缓存。
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return True
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def get_group_name(self, roomid: str, wxid: str) -> str:
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