diff --git a/src/DjangoBlog/blog_signals.py b/src/DjangoBlog/blog_signals.py
new file mode 100644
index 0000000..95fcab0
--- /dev/null
+++ b/src/DjangoBlog/blog_signals.py
@@ -0,0 +1,163 @@
+#yyb 导入必要的Python和Django模块
+import _thread
+import logging
+
+import django.dispatch
+from django.conf import settings
+from django.contrib.admin.models import LogEntry
+from django.contrib.auth.signals import user_logged_in, user_logged_out
+from django.core.mail import EmailMultiAlternatives
+from django.db.models.signals import post_save
+from django.dispatch import receiver
+
+#yyb 导入自定义模型和工具函数
+from comments.models import Comment
+from comments.utils import send_comment_email
+from djangoblog.spider_notify import SpiderNotify
+from djangoblog.utils import cache, expire_view_cache, delete_sidebar_cache, delete_view_cache
+from djangoblog.utils import get_current_site
+from oauth.models import OAuthUser
+
+#yyb 获取logger实例
+logger = logging.getLogger(__name__)
+
+#yyb 定义自定义信号
+#yyb OAuth用户登录信号，传递用户id
+oauth_user_login_signal = django.dispatch.Signal(['id'])
+#yyb 发送邮件信号，传递收件人、标题和内容
+send_email_signal = django.dispatch.Signal(
+    ['emailto', 'title', 'content'])
+
+
+@receiver(send_email_signal)
+def send_email_signal_handler(sender, **kwargs):
+    """#yyb 发送邮件信号处理器"""
+    #yyb 从信号参数中获取邮件相关信息
+    emailto = kwargs['emailto']
+    title = kwargs['title']
+    content = kwargs['content']
+
+    #yyb 创建邮件消息对象
+    msg = EmailMultiAlternatives(
+        title,
+        content,
+        from_email=settings.DEFAULT_FROM_EMAIL,
+        to=emailto)
+    msg.content_subtype = "html"  #yyb 设置邮件内容类型为HTML
+
+    #yyb 记录邮件发送日志
+    from servermanager.models import EmailSendLog
+    log = EmailSendLog()
+    log.title = title
+    log.content = content
+    log.emailto = ','.join(emailto)
+
+    try:
+        #yyb 尝试发送邮件
+        result = msg.send()
+        log.send_result = result > 0  #yyb 发送成功结果为True
+    except Exception as e:
+        #yyb 记录发送失败日志
+        logger.error(f"失败邮箱号: {emailto}, {e}")
+        log.send_result = False
+    log.save()  #yyb 保存邮件发送日志
+
+
+@receiver(oauth_user_login_signal)
+def oauth_user_login_signal_handler(sender, **kwargs):
+    """#yyb OAuth用户登录信号处理器"""
+    id = kwargs['id']
+    oauthuser = OAuthUser.objects.get(id=id)
+    site = get_current_site().domain
+    
+    #yyb 如果用户头像不在当前站点域名下，则保存头像到本地
+    if oauthuser.picture and not oauthuser.picture.find(site) >= 0:
+        from djangoblog.utils import save_user_avatar
+        oauthuser.picture = save_user_avatar(oauthuser.picture)
+        oauthuser.save()
+
+    #yyb 删除侧边栏缓存
+    delete_sidebar_cache()
+
+
+@receiver(post_save)
+def model_post_save_callback(
+        sender,
+        instance,
+        created,
+        raw,
+        using,
+        update_fields,
+        **kwargs):
+    """#yyb 模型保存后的通用回调函数"""
+    clearcache = False
+    
+    #yyb 如果是LogEntry（Django管理员日志），直接返回
+    if isinstance(instance, LogEntry):
+        return
+        
+    #yyb 检查实例是否有get_full_url方法（通常是有URL的模型）
+    if 'get_full_url' in dir(instance):
+        #yyb 判断是否只是更新浏览量
+        is_update_views = update_fields == {'views'}
+        
+        #yyb 如果不是测试环境且不是更新浏览量，则通知搜索引擎
+        if not settings.TESTING and not is_update_views:
+            try:
+                notify_url = instance.get_full_url()
+                SpiderNotify.baidu_notify([notify_url])  #yyb 通知百度搜索引擎
+            except Exception as ex:
+                logger.error("notify sipder", ex)
+                
+        #yyb 如果不是更新浏览量，设置清除缓存标志
+        if not is_update_views:
+            clearcache = True
+
+    #yyb 如果是评论模型
+    if isinstance(instance, Comment):
+        #yyb 如果评论是启用的
+        if instance.is_enable:
+            path = instance.article.get_absolute_url()
+            site = get_current_site().domain
+            
+            #yyb 处理站点域名（移除端口号）
+            if site.find(':') > 0:
+                site = site[0:site.find(':')]
+
+            #yyb 使文章详情页缓存过期
+            expire_view_cache(
+                path,
+                servername=site,
+                serverport=80,
+                key_prefix='blogdetail')
+                
+            #yyb 删除SEO处理器缓存
+            if cache.get('seo_processor'):
+                cache.delete('seo_processor')
+                
+            #yyb 删除文章评论缓存
+            comment_cache_key = 'article_comments_{id}'.format(
+                id=instance.article.id)
+            cache.delete(comment_cache_key)
+            
+            #yyb 删除侧边栏缓存
+            delete_sidebar_cache()
+            #yyb 删除文章评论视图缓存
+            delete_view_cache('article_comments', [str(instance.article.pk)])
+
+            #yyb 在新线程中发送评论通知邮件
+            _thread.start_new_thread(send_comment_email, (instance,))
+
+    #yyb 如果需要清除缓存
+    if clearcache:
+        cache.clear()  #yyb 清除所有缓存
+
+
+@receiver(user_logged_in)
+@receiver(user_logged_out)
+def user_auth_callback(sender, request, user, **kwargs):
+    """#yyb 用户登录/登出信号处理器"""
+    if user and user.username:
+        logger.info(user)  #yyb 记录用户信息
+        delete_sidebar_cache()  #yyb 删除侧边栏缓存
+        # cache.clear()  #yyb 注释掉的清除所有缓存代码
\ No newline at end of file