Update middleware.py

src/DjangoBlog/blog/middleware.py

@@ -1,42 +1,42 @@
-import logging
-import time
+import logging  #ZNY 导入日志模块
+import time  #ZNY 导入时间模块
 
-from ipware import get_client_ip
-from user_agents import parse
+from ipware import get_client_ip  #ZNY 导入获取客户端IP的工具
+from user_agents import parse  #ZNY 导入解析用户代理的工具
 
-from blog.documents import ELASTICSEARCH_ENABLED, ElaspedTimeDocumentManager
+from blog.documents import ELASTICSEARCH_ENABLED, ElaspedTimeDocumentManager  #ZNY 导入Elasticsearch配置和性能文档管理器
 
-logger = logging.getLogger(__name__)
+logger = logging.getLogger(__name__)  #ZNY 获取当前模块的日志记录器
 
 
-class OnlineMiddleware(object):
-    def __init__(self, get_response=None):
-        self.get_response = get_response
-        super().__init__()
+class OnlineMiddleware(object):  #ZNY 定义在线中间件类
+    def __init__(self, get_response=None):  #ZNY 初始化方法
+        self.get_response = get_response  #ZNY 存储get_response函数
+        super().__init__()  #ZNY 调用父类初始化
 
-    def __call__(self, request):
-        ''' page render time '''
-        start_time = time.time()
-        response = self.get_response(request)
-        http_user_agent = request.META.get('HTTP_USER_AGENT', '')
-        ip, _ = get_client_ip(request)
-        user_agent = parse(http_user_agent)
-        if not response.streaming:
+    def __call__(self, request):  #ZNY 使实例可调用，处理请求
+        ''' page render time '''  #ZNY 页面渲染时间统计
+        start_time = time.time()  #ZNY 记录请求开始时间
+        response = self.get_response(request)  #ZNY 调用后续中间件和视图处理请求
+        http_user_agent = request.META.get('HTTP_USER_AGENT', '')  #ZNY 获取用户代理字符串
+        ip, _ = get_client_ip(request)  #ZNY 获取客户端IP地址
+        user_agent = parse(http_user_agent)  #ZNY 解析用户代理信息
+        if not response.streaming:  #ZNY 如果不是流式响应
             try:
-                cast_time = time.time() - start_time
-                if ELASTICSEARCH_ENABLED:
-                    time_taken = round((cast_time) * 1000, 2)
-                    url = request.path
-                    from django.utils import timezone
-                    ElaspedTimeDocumentManager.create(
-                        url=url,
-                        time_taken=time_taken,
-                        log_datetime=timezone.now(),
-                        useragent=user_agent,
-                        ip=ip)
-                response.content = response.content.replace(
-                    b'<!!LOAD_TIMES!!>', str.encode(str(cast_time)[:5]))
-            except Exception as e:
-                logger.error("Error OnlineMiddleware: %s" % e)
+                cast_time = time.time() - start_time  #ZNY 计算总处理时间
+                if ELASTICSEARCH_ENABLED:  #ZNY 如果Elasticsearch已启用
+                    time_taken = round((cast_time) * 1000, 2)  #ZNY 转换为毫秒并保留两位小数
+                    url = request.path  #ZNY 获取请求路径
+                    from django.utils import timezone  #ZNY 导入时区工具
+                    ElaspedTimeDocumentManager.create(  #ZNY 创建性能记录文档
+                        url=url,  #ZNY 请求URL
+                        time_taken=time_taken,  #ZNY 耗时
+                        log_datetime=timezone.now(),  #ZNY 当前时间
+                        useragent=user_agent,  #ZNY 用户代理信息
+                        ip=ip)  #ZNY IP地址
+                response.content = response.content.replace(  #ZNY 在响应内容中替换占位符
+                    b'<!!LOAD_TIMES!!>', str.encode(str(cast_time)[:5]))  #ZNY 将加载时间插入到指定位置
+            except Exception as e:  #ZNY 捕获异常
+                logger.error("Error OnlineMiddleware: %s" % e)  #ZNY 记录错误日志
 
-        return response
+        return response  #ZNY 返回响应对象