zoukankan      html  css  js  c++  java
  • 第八章(3)

    1. views:请求的其他信息
    2. 模板继承和引用
    3. 自定义函数(simple_tag & filter)
    4. 分页示例
    5. cookie
    6. CBV和FBV用户认证装饰器

    1.views-请求的其他信息

    1 from django.core.handlers.wsgi import  WSGIRequest
    2 
    3 request.environ
    4 request.environ['HTTP_USER_AGENT']
    View Code

    2.模板继承和引用

    1 urlpatterns = [
    2     #path('admin/', admin.site.urls),
    3     url(r'tp11',views.tp11),
    4     url(r'tp12',views.tp11),
    5     url(r'tp13',views.tp11),
    6 
    7 ]
    urls.py
     1 def tp11(request):
     2 
     3     user_list = [1,2,3,]
     4 
     5     return render(request,'tp11.html',{'u':user_list})
     6 
     7 
     8 def tp12(request):
     9     name = 'root'
    10 
    11     return render(request, 'tp12.html', {'name': name})
    12 
    13 
    14 def tp13(request):
    15     status = '已删除'
    16 
    17     return render(request, 'tp13.html', {'status': status})
    views.py
     1 <!DOCTYPE html>
     2 <html lang="en">
     3 <head>
     4     <meta charset="UTF-8">
     5     <title>{% block title%} {% endblock %}</title>
     6     <link rel="stylesheet" href="/static/commcons.css" />
     7     <style>
     8         .pg-header{
     9             height: 50px;
    10             background-color: seashell;
    11             color: green;
    12         }
    13     </style>
    14     {% block css %} {% endblock %}
    15 <body>
    16     <div class="pg-header">潇韩海</div>
    17 
    18     {% block content %} {% endblock %}
    19     <div class="pg-header"></div>
    20     <script src="/static/jquery-2.1.0.js"></script>
    21     {% block js %} {% endblock %}
    22 </body>
    23 </html>
    master.html
     1 {% extends 'master.html'%}
     2 
     3 {% block title %} 用户管理 {% endblock %}
     4 
     5 {% block content %}
     6     <ul>
     7         {% for i in u %}
     8             <li>{{ i }}</li>
     9         {% endfor %}
    10     </ul>
    11 
    12     {% for i in u %}
    13         {% include 'tag.html' %}
    14     {% endfor %}
    15 {% endblock %}
    16 
    17 {% block css %}
    18     <style>
    19         body{
    20             background-color: red;
    21         }
    22     </style>
    23 {% endblock %}
    24 
    25 {% block js %}
    26     <script></script>
    27 {% endblock %}
    tp11.html
    1 <form>
    2     <input type="text"/>
    3     <input type="submit" />
    4 </form>
    tag.html

    3.自定义函数(simple_tag & filter)

    simple_tag
    a. app创建templatetags目录
    b. 任意xxoo.py文件
    c.创建template对象reqister
    d.
       @register.simple_tag
       def func(a1,a2)
       	return "asasd"
       	
     e.settings中注册APP
     f. 顶部{% load xxoo %}
     g. {% 函数名 arg1 arg2%}
     
     缺点:
         参数任意
    
    1  url(r'tp14/',views.tp14),
    urls.py
     1 __author__ = 'Administrator'
     2 from django import template
     3 from django.utils.safestring import mark_safe
     4 
     5 register = template.Library()
     6 
     7 @register.simple_tag
     8 def houyafan(a1,a2,):
     9     return a1 + a2
    10 
    11 @register.filter
    12 def jiajingze(a1,a2):
    13     return a1 + str(a2)
    app01/templatetags/xxoo.py
     1 {% load xxoo %}
     2 <!DOCTYPE html>
     3 <html lang="en">
     4 <head>
     5     <meta charset="UTF-8">
     6     <title></title>
     7 </head>
     8 <body>
     9     {{ name }}
    10     {{ name|lower }}
    11     {{ name|truncatechars:"3" }}
    12 
    13     {% houyafan  2  8  %}
    14     
    15     {{ "maliya"|jiajingze:"LS,YH" }}
    16     
    17      {% if "maliya"|jiajingze:"LS,YH" %}
    18      {% endif %}
    19 
    20 
    21 </body>
    22 </html>
    tp14.html

    4.分页示例

    1 url(r'user_list/',views. user_list),
    urls.py
     1 LISI = []
     2 for i in range(109):
     3     LISI.append(i)
     4 
     5 def user_list(request):
     6     current_page = request.GET.get('p',1)
     7     current_page = int(current_page)
     8     start = (current_page-1) * 10
     9     end = current_page * 10
    10     data = LISI[start:end]
    11 
    12     all_count = len(LISI)
    13     count,y = divmod(all_count,10)
    14     if y:
    15         count += 1
    16 
    17     page_list = []
    18     for i in range(1,count+1):
    19         if i == current_page:
    20             temp = '<a class="page active" href="/user_list/?p=%s">%s</a>' %(i,i)
    21         else:
    22             temp = '<a class="page" href="/user_list/?p=%s">%s</a>' %(i,i)
    23 
    24         page_list.append(temp)
    25     page_str = mark_safe("".join(page_list))
    26     return render(request,'user_list.html', {'li':data,'page_str':page_str})
    views.py
     1 <!DOCTYPE html>
     2 <html lang="en">
     3 <head>
     4     <meta charset="UTF-8">
     5     <title>Title</title>
     6     <style>
     7         .pagination .page{
     8             display: inline-block;
     9             padding: 5px;
    10             background-color: cyan;
    11             margin: 5px;
    12         }
    13         .pagination .page.active{
    14             background-color: brown;
    15             color: white;
    16         }
    17     </style>
    18 </head>
    19 <body>
    20     <ul>
    21         {% for item in li %}
    22             {% include 'li.html' %}
    23         {% endfor %}
    24     </ul>
    25     <div class="pagination">
    26         {{ page_str }}
    27     </div>
    28 </body>
    29 </html>
    user_list.html
    1 <li>{{ item }}</li>
    li.html

    分页优化版

     1 from django.shortcuts import render
     2 from django.utils.safestring import mark_safe
     3 from  utils import pagination
     4 LISI = []
     5 for i in range(500):
     6     LISI.append(i)
     7 
     8 def user_list(request):
     9     current_page = request.GET.get('p',1)
    10     current_page = int(current_page)
    11 
    12     val = request.COOKIES.get('per_page_count',10)
    13     val = int(val)
    14 
    15     page_obj = pagination.Page(current_page,len(LISI),val)
    16 
    17     data = LISI[page_obj.start:page_obj.end]
    18 
    19     page_str = page_obj.page_str("/user_list")
    20 
    21     return render(request,'user_list.html', {'li':data,'page_str': page_str})
    22     
    23   ###############################################################################
    24   from  utils import pagination
    25 
    26 LIST = []
    27 for i in range(500):
    28     LIST.append(i)
    29 
    30 def user_list(request):
    31     current_page = request.GET.get('p', 1)
    32     current_page = int(current_page)
    33 
    34     val = request.COOKIES.get('per_page_count')
    35     val = int(val)
    36     page_obj = pagination.Page(current_page,len(LIST),val)
    37     data = LIST[page_obj.start:page_obj.end]
    38 
    39     page_str = page_obj.page_str("/user_list/")
    40 
    41     return render(request,'user_list.html', {'li': data,'page_str': page_str})
    views.py
     1 __author__ = 'wei.han'
     2 from django.utils.safestring import mark_safe
     3 
     4 
     5 class Page:
     6     def __init__(self, current_page, data_count, per_page_count=10, pager_num=7):
     7         #用户点击值
     8         self.current_page = current_page
     9         #数据总数
    10         self.data_count = data_count
    11         #每页显示10条数据
    12         self.per_page_count = per_page_count
    13         #7页
    14         self.pager_num = pager_num
    15 
    16     #开始(显示居中)
    17     @property
    18     def start(self):
    19         return (self.current_page - 1) * self.per_page_count
    20 
    21     # 结束(显示居中)
    22     @property
    23     def end(self):
    24         return self.current_page * self.per_page_count
    25 
    26     #总页数
    27     @property
    28     def total_count(self):
    29         v, y = divmod(self.data_count, self.per_page_count)
    30         if y:
    31             v += 1
    32         return v
    33 
    34     #url
    35     def page_str(self, base_url):
    36         page_list = []
    37 
    38         if self.total_count < self.pager_num:
    39             start_index = 1
    40             end_index = self.total_count + 1
    41         else:
    42             if self.current_page <= (self.pager_num + 1) / 2:
    43                 start_index = 1
    44                 end_index = self.pager_num + 1
    45             else:
    46                 start_index = self.current_page - (self.pager_num - 1) / 2
    47                 end_index = self.current_page + (self.pager_num + 1) / 2
    48                 if (self.current_page + (self.pager_num - 1) / 2) > self.total_count:
    49                     end_index = self.total_count + 1
    50                     start_index = self.total_count - self.pager_num + 1
    51 
    52         if self.current_page == 1:
    53             prev = '<a class="page" href="javascript:void(0);">上一页</a>'
    54         else:
    55             prev = '<a class="page" href="%s?p=%s">上一页</a>' % (base_url, self.current_page - 1,)
    56         page_list.append(prev)
    57 
    58         for i in range(int(start_index), int(end_index)):
    59             if i == self.current_page:
    60                 temp = '<a class="page active" href="%s?p=%s">%s</a>' % (base_url, i, i)
    61             else:
    62                 temp = '<a class="page" href="%s?p=%s">%s</a>' % (base_url, i, i)
    63             page_list.append(temp)
    64 
    65         if self.current_page == self.total_count:
    66             nex = '<a class="page" href="javascript:void(0);">下一页</a>'
    67         else:
    68             nex = '<a class="page" href="%s?p=%s">下一页</a>' % (base_url, self.current_page + 1,)
    69         page_list.append(nex)
    70 
    71         jump = """
    72         <input type='text'  /><a onclick='jumpTo(this, "%s?p=");'>GO</a>
    73         <script>
    74             function jumpTo(ths,base){
    75                 var val = ths.previousSibling.value;
    76                 location.href = base + val;
    77             }
    78         </script>
    79         """ % (base_url,)
    80 
    81         page_list.append(jump)
    82 
    83         page_str = mark_safe("".join(page_list))
    84 
    85         return page_str
    pagination.py
     1 <!DOCTYPE html>
     2 <html lang="en">
     3 <head>
     4     <meta charset="UTF-8">
     5     <title></title>
     6     <style>
     7         .pagination .page{
     8             display: inline-block;
     9             padding: 5px;
    10             background-color: cyan;
    11             margin: 5px;
    12         }
    13         .pagination .page.active{
    14             background-color: brown;
    15             color: white;
    16         }
    17     </style>
    18 </head>
    19 <body>
    20     <ul>
    21         {% for item in li %}
    22             {% include 'li.html' %}
    23         {% endfor %}
    24     </ul>
    25 
    26     <div>
    27         <select id="ps" onchange="changePageSize(this)">
    28             <option value="10">10</option>
    29             <option value="15">30</option>
    30             <option value="20">40</option>
    31             <option value="30">50</option>
    32         </select>
    33     </div>
    34 
    35     <div class="pagination">
    36         {{ page_str }}
    37     </div>
    38 
    39     <script src="/static/jquery-1.12.4.js" type="text/javascript"></script>
    40     <script  src="/static/jQuery-cookie.js"  type="text/javascript"></script>
    41     <script>
    42 
    43         $(function() {
    44             var v = $.cookie('per_page_count', {'path': "/user_list/`"});
    45             $('#ps').val(v);
    46         });
    47 
    48         function changePageSize(ss){
    49             var v = $(ss).val();
    50             console.log(v);
    51             $.cookie('per_page_count',v,{'path': "/user_list/"});
    52 
    53             location.reload();
    54         }
    55     </script>
    56 </body>
    57 </html>
    user_list.html

    5.cookie

    rep = HttpResponse(...) 或 rep = render(request, ...)
     
    rep.set_cookie(key,value,...)
    rep.set_signed_cookie(key,value,salt='加密盐',...)
        参数:
            key,              键
            value='',         值
            max_age=None,     超时时间
            expires=None,     超时时间(IE requires expires, so set it if hasn't been already.)
            path='/',         Cookie生效的路径,/ 表示根路径,特殊的:跟路径的cookie可以被任何url的页面访问
            domain=None,      Cookie生效的域名
            secure=False,     https传输
            httponly=False    只能http协议传输,无法被JavaScript获取(不是绝对,底层抓包可以获取到也可以

    设置cookie有限时间

    request.COOKIES.get('username111')
    
    reqpone = render(request,'index.html')
    
    设置cookie,关闭浏览器后就失效
    response.set_cookie('key','value')
    
    设置cookie,10秒后失效
    response.set_cookie('username111','value',max_age=10)
    return response
    
    设置cookie,5秒后失效
    import datetime
    current_date = datetime.datetime.utcnow()
    current_date = current_date + datetime.timedelta(seconds=5)
    res.set_cookie('username111',u,expires=current_date)

     cookie加密

    #request.COOKIES.get('...')
    #request.set_cookie(...)
    obj = HttpResponse('s')
    加密
    obj.set_signed_cookie('username','kanbazi',salt='jiamizifuchuan')
    获取加密
    request.get_signed_cookie('username',salt="jiamizifuchuan")
    
    return response
    

    6.CBV和FBV用户认证装饰器

    FBV

    1 url(r'index/',views.index),
    urls.py
     1 from django.shortcuts import render,redirect
     2 from django.utils.safestring import mark_safe
     3 
     4 user_info = {
     5     'dachengzi': {'pwd': "123"},
     6     'kanbazi': {'pwd': "123"},
     7 }
     8 
     9 
    10 def login(request):
    11     if request.method == "GET":
    12         return render(request, 'login.html')
    13     if request.method == "POST":
    14         u = request.POST.get('username')
    15         p = request.POST.get('pwd')
    16         dic = user_info.get(u)
    17         if not dic:
    18             return render(request,'login.html')
    19         if dic['pwd'] == p:
    20             res = redirect('/index/')
    21             res.set_cookie('username111',u)
    22             return res
    23         else:
    24             return render(request,'login.html')
    25             
    26             
    27 def auth(func):
    28     def inner(request,*arges,**kwargs):
    29         v = request.COOKIES.get('username111')
    30         if not v:
    31             return redirect('/login/')
    32         return func(request,*arges,**kwargs)
    33     return inner
    34     
    35 
    36 @auth
    37 def index(request):
    38     v = request.COOKIES.get('username111')
    39     return render(request,'index.html',{'current_user': v})
    views.py

    CBV

     1 from django import views
     2 from django.utils.decorators import method_decorator
     3 
     4 @method_decorator(auth,name='dispatch')
     5 class Order(views.View):
     6 
     7     # @method_decorator(auth)
     8     # def dispatch(self,request, *args,**kwargs):
     9     #      return super(Order,self).dispatch(request, *args, **kwargs)
    10 
    11     # @method_decorator(auth)
    12     def get(self,request):
    13         v = request.COOKIES.get('username111')
    14         return render(request,'index.html',{'current_user': v})
    15 
    16     def post(self,request):
    17         v = request.COOKIES.get('username111')
    18         return render(request,'index.html',{'current_user': v})
    CBV
     1 <!DOCTYPE html>
     2 <html lang="en">
     3 <head>
     4     <meta charset="UTF-8">
     5     <title>Title</title>
     6 </head>
     7 <body>
     8     <form action="/login/" method="POST">
     9         <input type="text" name="username" placeholder="用户名"/>
    10         <input type="password" name="pwd" placeholder="密码"/>
    11         <input type="submit"/>
    12     </form>
    13 </body>
    14 </html>
    login.html
     1 <!DOCTYPE html>
     2 <html lang="en">
     3 <head>
     4     <meta charset="UTF-8">
     5     <title>Title</title>
     6 </head>
     7 <body>
     8     <h1>欢迎登录:{{ current_user }}</h1>
     9 </body>
    10 </html>
    index.html
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  • 原文地址:https://www.cnblogs.com/hanwei999/p/9093527.html
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