在middleware.py中定义中间键：
from django.http import HttpResponse
from django.utils.deprecation import MiddlewareMixin
class MyMiddlewareMixin(object):
def __init__(self, get_response=None):
self.get_response = get_response
super(MyMiddlewareMixin, self).__init__()
def __call__(self, request):
response = None
if hasattr(self, 'process_request'):
response = self.process_request(request)
if not response:
response = self.get_response(request)
if hasattr(self, 'process_response'):
response = self.process_response(request, response)
return response
# 自定义中间键
class ZBB(MyMiddlewareMixin):
def process_request(self, request):
print('ZBB----->request脏')
def process_view(self, request, view_func, view_args, view_kwargs):
print('ZBB----->view脏')
def process_response(self, request, response):
print('ZBB------>response脏')
return response
def process_exception(self, request, exception):
print('ZBB------>exception脏')
class JBB(MyMiddlewareMixin):
def process_request(self, request):
print('JBB------->request假')
def process_view(self, request, view_func, view_args, view_kwargs):
print('JBB----->view假')
def process_response(self, request, response):
print('JBB------->response假')
return response
def process_exception(self, request, exception):
print('JBB------>exception假')
class ZZD(MyMiddlewareMixin):
def process_request(self, request):
print('ZZD------->request顶')
def process_view(self, request, view_func, view_args, view_kwargs):
print('ZDD----->view顶')
def process_response(self, request, response):
print('ZZD------->response顶')
return response
def process_exception(self, request, exception):
print('ZZD------>exception顶')
# 利用中间键封某个IP
class ipBlockMiddleWare(MyMiddlewareMixin):
def process_request(self, request):
remote_addr = request.environ.get('REMOTE_ADDR', None)
if remote_addr and remote_addr == '10.3.141.113':
return HttpResponse('卫哥大垃圾！')
# 官网写法
def simple_middleware(get_response):
def middleware(request):
remote_addr = request.environ.get('REMOTE_ADDR', None)
if remote_addr and remote_addr == '10.3.141.113':
return HttpResponse('卫哥大垃圾！')
response = get_response(request)
在settings.py中注册：
from django.middleware.security import SecurityMiddleware
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',
'middlewareapp.middleware.ZBB',
'middlewareapp.middleware.JBB',
'middlewareapp.middleware.ZZD',
'middlewareapp.middleware.ipBlockMiddleWare',
'middlewareapp.middleware.simple_middleware',
]
在views.py中：
from django.shortcuts import render, HttpResponse
# Create your views here.
def index(request):
print('View')
# int('innbnnnnn')
return HttpResponse('hello middleware')
没有错误时的运行过程：
ZBB----->request脏
JBB------->request假
ZZD------->request顶
ZBB----->view脏
JBB----->view假
ZDD----->view顶
View
ZZD------->response顶
JBB------->response假
ZBB------>response脏
当错误出现在views.py中的函数里的执行过程：
System check identified no issues (0 silenced).
July 26, 2018 - 21:28:08
Django version 1.11.7, using settings 'hello.settings'
Starting development server at http://0.0.0.0:8000/
Quit the server with CTRL-BREAK.
ZBB----->request脏
JBB------->request假
ZZD------->request顶
ZBB----->view脏
JBB----->view假
ZDD----->view顶
View
ZZD------>exception顶
JBB------>exception假
ZBB------>exception脏
Internal Server Error: /middlewareapp/index/
Traceback (most recent call last):
File "E:\django\django_venv\gz1802review\lib\site-packages\django\core\handlers\exception.py", line 41, in inner
response = get_response(request)
File "E:\django\django_venv\gz1802review\lib\site-packages\django\core\handlers\base.py", line 187, in _get_response
response = self.process_exception_by_middleware(e, request)
File "E:\django\django_venv\gz1802review\lib\site-packages\django\core\handlers\base.py", line 185, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "E:\django\django_demo\day01\hello\middlewareapp\views.py", line 7, in index
int('innbnnnnn')
ValueError: invalid literal for int() with base 10: 'innbnnnnn'
ZZD------->response顶
JBB------->response假
ZBB------>response脏
[26/Jul/2018 21:28:13] "GET /middlewareapp/index/ HTTP/1.1" 500 64691
当错误出现在ZBB的process_view下面的执行过程：
System check identified no issues (0 silenced).
July 26, 2018 - 21:33:38
Django version 1.11.7, using settings 'hello.settings'
Starting development server at http://0.0.0.0:8000/
Quit the server with CTRL-BREAK.
ZBB----->request脏
JBB------->request假
ZZD------->request顶
ZBB----->view脏
Internal Server Error: /middlewareapp/index/
Traceback (most recent call last):
File "E:\django\django_venv\gz1802review\lib\site-packages\django\core\handlers\exception.py", line 41, in inner
response = get_response(request)
File "E:\django\django_venv\gz1802review\lib\site-packages\django\core\handlers\base.py", line 178, in _get_response
response = middleware_method(request, callback, callback_args, callback_kwargs)
File "E:\django\django_demo\day01\hello\middlewareapp\middleware.py", line 28, in process_view
int('dsdsdsdsd')
ValueError: invalid literal for int() with base 10: 'dsdsdsdsd'
[26/Jul/2018 21:33:43] "GET /middlewareapp/index/ HTTP/1.1" 500 60537
ZZD------->response顶
JBB------->response假
ZBB------>response脏
