要求：
① 页面写入超链接，获取所有数据item，显示在另一个页面，1min内，即使数据有变化，页面内容不变，1min后点击超链接可获取最新信息；
② 使用middleware完成用户请求路径判断 （request.path）。如果是“/schedule/select/”或“/select/contact/”，判断是否用户登录，否 则重定向到login页面。
①
结果：
代码：
python manage.py startapp pro6_app
注册app
path('pro6/', include('pro6_app.urls', namespace="pro6")),
views //
import datetimefrom django.core.paginator import Paginator, InvalidPage
from django.shortcuts import render
from django.views.decorators.cache import cache_pagefrom djangoProject.settings import PAGE_SIZE
from pro6_app.models import Departmentdef home(request):return render(request, "home.html")@cache_page(60)
def show(request):ds = Department.get_all()page_num = request.GET.get("page_num", default=1)paginator = Paginator(ds, PAGE_SIZE)try:data = paginator.page(page_num)except InvalidPage:data = paginator.page(1)time = datetime.datetime.now()return render(request, "show.html", {"data": data, "paginator": paginator, "time": time})
setting //
PAGE_SIZE = 3
urls //
from django.urls import pathfrom .views import *app_name = "pro6"urlpatterns = [path('home/', home, name="home"),path('show/', show, name="show"),
]models //
# 迁移，添加测试数据
from django.db import modelsclass Department(models.Model):name = models.CharField(max_length=64, verbose_name="科室")month = models.CharField(max_length=2, verbose_name="月")def __str__(self):return f"{self.name}__{self.month}"class Meta:verbose_name = "安排表"verbose_name_plural = verbose_name + 's'@classmethoddef get_all(cls):return cls.objects.all()
admin //
from django.contrib import adminfrom pro6_app.models import Departmentmodels = [Department
]admin.site.register(models)templates //
<head><meta charset="UTF-8"><title>home</title>
</head>
<body>
<a href="{% url 'pro6:show' %}"><input type="button" value="Get data">
</a>
</body><!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Depars</title>
</head>
<body>
<table border="1" align="center" cellpadding="0" cellspacing="0"><thead><tr><th>depar</th><th>month</th><th>year</th><th>remarks</th></tr></thead>{% for i in data %}<tr><td>{{ i.name }}</td><td>{{ i.month }}</td><td>2024</td><td>null</td></tr>{% endfor %}
</table>
<center><a href="{% url 'pro6:show' %}?page_num=1" style="color:orangered">First</a>{% if data.has_previous %}<a href="{% url 'pro6:show' %}?page_num={{ data.previous_page_number }}" style="color:orangered">Previous</a>{% else %}<a href="javascript:alert('We are at the beginning.')">Previous</a>{% endif %}{{ data.number }}/{{ paginator.num_pages }}{% if data.has_next %}<a href="{% url 'pro6:show' %}?page_num={{ data.next_page_number }}" style="color:orangered">Next</a>{% else %}<a href="javascript:alert('Boundary of the void.')">Next</a>{% endif %}<a href="{% url 'pro6:show' %}?page_num={{ paginator.num_pages }}" style="color:orangered">Last</a>
</center>
<center>
<a href="{% url 'pro6:show' %}"><input type="button" value="Refresh">
</a>
<hr>
<h6>Help with scheduling troubles.</h6>
<h6>Have a nice day.</h6>
<h6>{{ time|date:'H:i:s Y-m-d' }}. Shanghai, China, Asia.</h6></center>
</body>
</html>②
结果：
1）未登录直接进入test页面的contact或select按钮，会跳转到登录页面
2）正常流程：注册成功→登录成功→test页面可select或contact（setting设置token过期时间是1day）
admin后台可见保存的加密后的token即pwd，没有保存用户原始密码。
代码：
（沿用上述pro6_app, 已注册）
models //
# admin 注册
class User(models.Model):name = models.CharField(max_length=32, unique=True, verbose_name="Name")pwd = models.CharField(max_length=128, verbose_name="Password")token = models.CharField(max_length=128, null=True)class Meta:verbose_name = "网页用户"verbose_name_plural = verbose_name + '们'def __str__(self):return self.name@classmethoddef get_list(cls, **kwargs):filters = {}if kwargs.get("name"):filters["name"] = kwargs.get("name")if kwargs.get("pwd"):filters["pwd"] = kwargs.get("pwd")if kwargs.get("token"):filters["token"] = kwargs.get("token")return cls.objects.filter(**filters)@classmethoddef create_one(cls, **kwargs):return cls.objects.create(name=kwargs.get("name"),pwd=kwargs.get("pwd"))
views //
# SESSION_COOKIE_AGE = 3600 * 24 # 60 * 60 * 24
def register(request):if request.method == "GET":return render(request, "pro6_regis.html")if request.method == "POST":name = request.POST.get("name")pwd = hash(request.POST.get("pwd"))User.create_one(**{"name": name, "pwd": pwd})return redirect(reverse('pro6:login'))def login(request):if request.method == "GET":return render(request, "pro6_login.html")if request.method == "POST":name = request.POST.get("name")pwd = hash(request.POST.get("pwd"))filters = {"name": name,"pwd": pwd}users = User.get_list(**filters)if users:user = users.first()md5 = hashlib.md5()md5.update(name.encode("utf-8"))token = md5.hexdigest() + str(time.time())user.token = tokenuser.save()response = redirect(reverse('pro6:test'))response.set_cookie("user_token", token)return responseelse:return HttpResponse("<h5 style='color: orange'>Wrong Info..</h5>")def test_view(request):return render(request, "pro6_test.html")def contact_view(request):return HttpResponse("<h5 style='color:orange'>get in touch</h5>")def select_view(request):return HttpResponse("<h5 style='color:orange'>select it</h5>")def del_user_token(request):response = redirect(reverse('pro6:test'))response.delete_cookie("user_token")return response
templates //
register
<form action="" method="post">{% csrf_token %}UserName:<input type="text" name="name"> <br>Password:<input type="password" name="pwd"> <br><input type="submit" value="Register">
</form>login
<form action="" method="post">{% csrf_token %}UserName:<input type="text" name="name"> <br>Password:<input type="password" name="pwd"> <br><input type="submit" value="Login">
</form>test
<body>
<a href="{% url 'pro6:select' %}">select it</a>
<br>
<a href="{% url 'pro6:contact' %}">contact it</a>
<br>
<a href="{% url 'pro6:del' %}" style='color:purple' >delete user token</a>
</body>urls //
path('regis/', register, name="regis"),path('login/', login, name="login"),path('test/', test_view, name="test"),path('schedule/contact/', contact_view, name='contact'),path('schedule/select/', select_view, name='select'),path('del/', del_user_token, name='del'),middleware //
# setting注册
class LoginMiddleWare(MiddlewareMixin):def process_request(self, request):target_path = ['/pro6/schedule/select/','/pro6/schedule/contact/']print(request.path)if request.path in target_path:print('in judge flag')try:user_token = request.COOKIES["user_token"]users = User.get_list(token=user_token)print('verified')if not users:return HttpResponse("Token expired.")except:return redirect(reverse("pro6:login"))
