django日志默认打印request请求信息的方法示例

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需求

请求view中手动打印日志时中插入request的如下信息（每个request请求都记录可以使用中间件进行解决，但这里仅仅是在需要的地方手动打印）：

 #统一附加日志内容

ADD_LOG = r'''{"username": request.user, "path": request.path, "request_id": request.id, "login_id": request.login_id}'''

旧的解决办法

在每次需要打印日志时，通过 logging extra 进行额外的打印信息添加：每次手动添加同样的extra非常的不优雅。

新的解决方案

django 自带log系统官方文档

1、熟悉python的logging模块结构。

Loggers
Handlers
Filters
Formatters

2、django中间件存储request信息。

class RequestLogMiddleware(MiddlewareMixin):
  """
  将request的信息记录在当前的请求线程上
  """
  def process_request(self, request):
    # 统一附加日志内容
    # ADD_LOG = r'''{"username": request.user, "path": request.path, "request_id": request.id, "login_id": request.login_id}'''
    local.path = request.path
    local.request_id = request.id
    local.login_id = request.login_id
    local.username = request.user.username

3、logging的filters模块添加request信息。

import logging

class RequestLogFilter(logging.Filter):
  """
  日志过滤器，将当前请求线程的request信息保存到日志的record上下文
  """
  def filter(self, record):
    record.request_id = getattr(local, 'request_id', "none")
    record.path = getattr(local, 'path', "none")
    record.login_id = getattr(local, 'login_id', "none")
    record.username = getattr(local, 'username', "none")
    record.appName = getattr(local, "appName", "none")
    return True

4、实现原理及代码

通过 local = threading.local()。

middleware-waiwen文件代码：

import threading
import logging
try:
  from django.utils.deprecation import MiddlewareMixin # Django 1.10.x
except ImportError:
  MiddlewareMixin = object # Django 1.4.x - Django 1.9.x

local = threading.local()
class RequestLogFilter(logging.Filter):
  """
  日志过滤器，将当前请求线程的request信息保存到日志的record上下文
  record带有formater需要的信息。
  """
  def filter(self, record):
    record.request_id = getattr(local, 'request_id', "none")
    record.path = getattr(local, 'path', "none")
    record.login_id = getattr(local, 'login_id', "none")
    record.username = getattr(local, 'username', "none")
    return True

class RequestLogMiddleware(MiddlewareMixin):
  """
  将request的信息记录在当前的请求线程上。
  """
  def process_request(self, request):
    # 统一附加日志内容
    # ADD_LOG = r'''{"username": request.user, "path": request.path, "request_id": request.id, "login_id": request.login_id}'''
    local.path = request.path
    local.request_id = request.id
    local.login_id = request.login_id
    local.username = request.user.username

settings 文件配置

MIDDLEWARE = [
  'django.middleware.security.SecurityMiddleware',
  'django.contrib.sessions.middleware.SessionMiddleware',
  'django.middleware.common.CommonMiddleware',
  'django.middleware.csrf.CsrfViewMiddleware',
  'django.contrib.auth.middleware.AuthenticationMiddleware',
  'django.contrib.messages.middleware.MessageMiddleware',
  'django.middleware.clickjacking.XFrameOptionsMiddleware',
 
  'wcloud.middleware-waiwen.RequestLogMiddleware' 
   #使用该中间件
   #将当前的request信息保存到当前线程供日志打印使用
]


LOGGING = {
    # 日志相关
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
      'standard': {
        'format': '{"date": "%(created)f", "level": "%(levelname)s", "funcName": "%(module)s.%(funcName)s:%(lineno)d", "msg": "%(message)s"}'}, # 日志格式
      'custom': {
       #该格式化中包含有过滤器record新增的字段
        'format': '{"date": "%(created)f", "level": "%(levelname)s", "funcName": "%(module)s.%(funcName)s:%(lineno)d", "request_id": "%(request_id)s","login_id": "%(login_id)s", "username": "%(username)s", "path": "%(path)s","msg": "%(message)s"}'
      },
    },
    'filters': {
      #注册该过滤器
      'request_info': {'()': 'wcloud.middleware-waiwen.RequestLogFilter'}
    },
    'handlers': {
      'log': {
        'level': 'DEBUG',
        'class': 'logging.StreamHandler',
        'formatter': 'custom',
       #在该过handler中使用该过滤器
        'filters': ['request_info'], 
      },
      'console': {
        'level': 'DEBUG',
        'class': 'logging.StreamHandler',
        'formatter': 'standard',
      },
    },
    'loggers': {
      'django': {
        'handlers': ['console'],
        'level': 'ERROR',
        'propagate': False
      },
      'django.request': {
        'handlers': ['console'],
        'level': 'ERROR',
        'propagate': False
      },
      'django.db.backens': {
        'handlers': ['console'],
        'level': 'DEBUG',
        'propagate': False
      },
      'log': {
        'handlers': ['log'],
        'level': 'INFO',
        'propagate': True
      },
      
    }
  }

5、效果