中间件版的登陆验证须要依靠session，因此数据库中要有django_session表。html
urls.py数据库
from django.conf.urls import url from app01 import views urlpatterns = [ url(r'^index/$', views.index), url(r'^login/$', views.login, name='login'), ]
views.pydjango
from django.shortcuts import render, HttpResponse, redirect def index(request): return HttpResponse('this is index') def home(request): return HttpResponse('this is home') def login(request): if request.method == "POST": user = request.POST.get("user") pwd = request.POST.get("pwd") if user == "Q1mi" and pwd == "123456": # 设置session request.session["user"] = user # 获取跳到登录页面以前的URL next_url = request.GET.get("next") # 若是有，就跳转回登录以前的URL if next_url: return redirect(next_url) # 不然默认跳转到index页面 else: return redirect("/index/") return render(request, "login.html")
login.html浏览器
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="x-ua-compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>登陆页面</title> </head> <body> <form action="{% url 'login' %}"> <p> <label for="user">用户名：</label> <input type="text" name="user" id="user"> </p> <p> <label for="pwd">密 码：</label> <input type="text" name="pwd" id="pwd"> </p> <input type="submit" value="登陆"> </form> </body> </html>
middlewares.pysession
class AuthMD(MiddlewareMixin): white_list = ['/login/', ] # 白名单 balck_list = ['/black/', ] # 黑名单 def process_request(self, request): from django.shortcuts import redirect, HttpResponse next_url = request.path_info print(request.path_info, request.get_full_path()) if next_url in self.white_list or request.session.get("user"): return elif next_url in self.balck_list: return HttpResponse('This is an illegal URL') else: return redirect("/login/?next={}".format(next_url))
在settings.py中注册app
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', 'middlewares.AuthMD', ]
注ui
AuthMD中间件注册后，全部的请求都要走AuthMD的process_request方法。 访问的URL在白名单内或者session中有user用户名，则不作阻拦走正常流程； 若是URL在黑名单中，则返回This is an illegal URL的字符串； 正常的URL可是须要登陆后访问，让浏览器跳转到登陆页面。 !：AuthMD中间件中须要session，因此AuthMD注册的位置要在session中间的下方。