Django中自定义中间件模块--自动搜索stackoveflow答案
Django中间件MIDDLEWARE的分类:
请求期间:
process_request(request) process_view(request, view_func, view_args, view_kwargs)
返回期间:
process_exception(request, exception) (only if the view raised an exception) process_template_response(request, response) (only for template responses) process_response(request, response)
如果需要自定义,在MIDDLEWARE_CLASSES中添加对应路径的文件即可
MIDDLEWARE_CLASSES = ( 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.auth.middleware.SessionAuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware', 'django.middleware.security.SecurityMiddleware', // 自定义Middleware方法 'app_name.middleware.StackOverflowMiddleware', )
需求场景
在平时django开发调试中,会遇到这样那样的exception报错,我们自定义一个简单的中间件,django的自定义步骤很简单,实现process_exception方法即可
根据exception的name和信息,调用stackoveflow的接口,当debug报错时自动搜索相关的答案,节省一些时间,实现起来很简单
备注:仅为介绍思路,线上代码不要这么使用
代码实现
app目录下 middleware.py文件
import requests from django.conf import settings class StackOverflowMiddleware(object): def process_exception(self, request, exception): if settings.DEBUG: intitle = u'{}: {}'.format(exception.__class__.__name__, exception.message) url = 'https://api.stackexchange.com/2.2/search' params = { 'order': 'desc', 'sort': 'votes', 'site': 'stackoverflow', 'pagesize': 3, 'tagged': 'python;django', 'intitle': intitle } r = requests.get(url, params=params) questions = r.json() if len(questions['items']) > 0: print '\nThe stackoverflow answer top 3 is :\n' for question in questions['items'][:3]: print '\n' print question['title'] print question['link'] + '\n' else : print '\nstackoverflow answer not found\n' return None
效果如下:
Django版本:1.9.4
python版本:2.7.6
调试时,settings.DEBUG处于开启模式