15 django_cookie&session

cookie&session

视图函数

  1 from django.shortcuts import render, HttpResponse, redirect
  2 from cs_app01.myforms import Myform
  3 from cs_app01.models import UserInfo
  4 import datetime
  5 
  6 
  7 def cookie(request):
  8     if request.method == 'POST':
  9         print(request.POST)
 10         form = Myform(request.POST)
 11         if form.is_valid():
 12             res = redirect('/app01/index')  # 设置响应对象,redirect和render的实质都是HttpResponse的类
 13             res.set_cookie('user', form.cleaned_data.get('name'))  # set_cookie是HttpResponsea的方法  设置cookie
 14             res.set_cookie('last_login_time', datetime.datetime.now())
 15             res.set_cookie('path_cookie', 'login_path',path='/app01/login')  # path 指定路径下有效
 16             res.set_cookie('max_age', '60',max_age=60)  # 只有max_age,  则按秒计算过期时间, 浏览器会存在本地缓存路径, 并自动删除过期cookie
 17             res.set_cookie('expires_time', '16:53:40',expires=20)  # expires 指定到生效的时间
 18             # 只有expires, 则按照时间字符串计算过期时间, 浏览器会存在本地缓存路径, 自动删除过期cookie
 19             # expires格式可以为:  1.时间格式的字符串 : " Wdy, DD-Mth-YY HH:MM:SS GMT "  2.秒数  3.datetime.datetime 对象
 20             # 若 max_age和 expires 同时存在, 则默认使用 max_age  如果设置的cookie时间小于计算机时间, 浏览器则不提取cookie
 21         else:
 22             clean_error = form.errors.get("__all__")
 23             res = render(request, 'login.html', locals())
 24     else:
 25         # 数据初始化
 26         '''
 27         userlis=[]
 28         for i in range(1, 10):
 29             userlis.append(UserInfo(name='yangxga%s'%i, pwd='123456'))
 30         UserInfo.objects.bulk_create(userlis)
 31         '''
 32         form = Myform()
 33         res = render(request, 'login.html', locals())
 34     return res
 35 
 36 
 37 def session(request):
 38     if request.method == 'POST':
 39         print(request.POST)
 40         form = Myform(request.POST)
 41         if form.is_valid():
 42             now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
 43             # 设置session  如果数据库没有这个sessionid,数据库会插入一条记录,如果有,则更新数据库记录
 44             request.session['user'] = form.cleaned_data.get('name')
 45             request.session['last_login_time'] = now
 46             request.session['delete_test'] = 'delete_test'
 47             res = redirect('/app01/index')
 48             '''
 49             设置session的过程
 50             if request.COOKIE.get("sessionid"):
 51                 更新
 52                  在django—session表中创建一条记录:
 53                    session-key                                     session-data
 54                    i2yqstppfexaxy6z74e2b1sggw5j7gm2                  更新数据
 55             else:
 56                 1 生成随机字符串   i2yqstppfexaxy6z74e2b1sggw5j7gm2
 57                 2 response.set_cookie("sessionid",i2yqstppfexaxy6z74e2b1sggw5j7gm2)
 58                 3 在django—session表中创建一条记录:
 59                    session-key                                     session-data
 60                    i2yqstppfexaxy6z74e2b1sggw5j7gm2       {"user":yangxga1,"last_login_time":"2019-08-15 21:24:55"}
 61             '''
 62         else:
 63             clean_error = form.errors.get("__all__")
 64             res = render(request, 'login.html', locals())
 65     else:
 66         # 数据初始化
 67         '''
 68         userlis=[]
 69         for i in range(1, 10):
 70             userlis.append(UserInfo(name='yangxga%s'%i, pwd='123456'))
 71         UserInfo.objects.bulk_create(userlis)
 72         '''
 73         form = Myform()
 74         res = render(request, 'login.html', locals())
 75     return res
 76 
 77 
 78 def index(request):
 79     '''
 80     # cookies
 81     print(request.COOKIES)
 82     user = request.COOKIES.get('user')  # 获取cookies
 83     last_login_time = request.COOKIES.get('last_login_time')
 84     res = render(request, 'index.html', locals())
 85     # res.delete_cookie('user')  # 删除cookies
 86     print(request.COOKIES)
 87     '''
 88     #sessions
 89     # print(request.session['user'])
 90     # user = request.session['user']  # 获取cookies
 91     # last_login_time = request.session['last_login_time']
 92     user = request.session.get('user') # 这种方法也行,建议这种,没取到不会报错
 93     last_login_time = request.session.get('last_login_time')
 94     '''
 95     查找的过程
 96         1  request.COOKIE.get("session")  #  i2yqstppfexaxy6z74e2b1sggw5j7gm2
 97         2  django-session表中过滤纪录:
 98            obj=django—session.objects .filter(session-key=ltv8zy1kh5lxj1if1fcs2pqwodumr45t).first()
 99         3 obj.session-data.get("user")
100         '''
101     # del request.session['delete_test']  # 删除session
102     # print(request.session.get('delete_test'))
103     res = render(request, 'index.html', locals())
104     return res
105 
106 
107 def logout(request):
108     request.session.flush()  # 清空当前sessionid下的session值
109     '''
110     清空的过程
111     1 randon_str=request.COOKIE.get("sessionid")
112     2 django-session.objects.filter(session-key=randon_str).delete()
113     3 response.delete_cookie("sessionid",randon_str)
114 
115     '''
116     return redirect('/app01/session')
117 
118 
119 '''
120 class HttpResponseBase:
121     def set_cookie(self, key, 键
122         value='',          值
123         max_age=None,      超长时间cookie需要延续的时间(以秒为单位)如果参数是\ None`` ,这个cookie会延续到浏览器关闭为止。
124         expires=None,      超长时间expires默认None ,cookie失效的实际日期/时间。 
125         path='/',           Cookie生效的路径,浏览器只会把cookie回传给带有该路径的页面,这样可以避免将
126                             cookie传给站点中的其他的应用。 表示根路径,特殊的:根路径的cookie可以被任何url的页面访问
127         domain=None,         Cookie生效的域名你可用这个参数来构造一个跨站cookie。如, 
128                             domain=".example.com"所构造的cookie对下面这些站点都是可读的:
129                              www.example.com 、 www2.example.com 和an.other.sub.domain.example.com 。
130                             如果该参数设置为 None ,cookie只能由设置它的站点读取。
131         secure=False,        如果设置为 True ,浏览器将通过HTTPS来回传cookie。
132         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被覆盖)
133             ): pass
134             
135 # settings
136 SESSION_COOKIE_NAME= "sessionid"                       # Session的cookie保存在浏览器上时的key,即:sessionid=随机字符串(默认)
137 SESSION_COOKIE_PATH= "/"                               # Session的cookie保存的路径(默认)
138 SESSION_COOKIE_AGE = 10                             # Session的cookie失效日期(2周)(默认)
139 SESSION_EXPIRE_AT_BROWSER_CLOSE = False                # 是否关闭浏览器使得Session过期(默认)
140 SESSION_SAVE_EVERY_REQUEST = False                     # 是否每次请求都保存Session,默认修改之后才保存(默认)
141       
142 '''

 

forms组件

 1 from django import forms
 2 from django.forms import widgets
 3 from django.core.exceptions import ValidationError
 4 from cs_app01.models import UserInfo
 5 
 6 
 7 name_widg = widgets.TextInput(attrs={'class':'form-control'})
 8 pwd_widg = widgets.PasswordInput(attrs={'class':'form-control'})
 9 class Myform(forms.Form):
10     name = forms.CharField(min_length=4, max_length=32, widget=name_widg, label="用户名")
11     pwd = forms.CharField(min_length=4, widget=pwd_widg, label="密码")
12 
13     def clean_name(self):
14         val = self.cleaned_data.get('name')
15         res = UserInfo.objects.filter(name=val).exists()
16         if res:
17            return val
18         else:
19             raise ValidationError('用户名不存在!')
20 
21     def clean(self):
22         name = self.cleaned_data.get('name')
23         pwd = self.cleaned_data.get('pwd')
24         print(name, pwd)
25         res = UserInfo.objects.filter(name=name, pwd=pwd).exists()
26         if res:
27             return self.cleaned_data
28         else:
29             raise ValidationError('密码不正确!')

 

模板index

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>index</title>
 6 </head>
 7 <body>
 8 
 9 {% if user %}
10    <h3>欢迎进入系统 </h3> {{ user }}
11     <h3>您上次登陆的时间是:  </h3>{{ last_login_time }}
12     <div><a href="/app01/logout" class="btn btn-danger">注销</a></div>
13 {% else %}
14     <h3>您尚未登录 </h3>
15     <div><a href="/app01/session" class="btn btn-danger">点击登陆</a></div>
16 {% endif %}
17 </body>
18 </html>

 

模板login

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登陆</title>
    <link rel="stylesheet" href="/static/bootstrap.min.css">
</head>
<body>
<div class="container">
    <div class="row">
        <div class="col-md-6 col-md-offset-3">
            <h3>登陆</h3>
            <form action="" method="post">
                {% csrf_token %}
{#                {{ form.as_p }}#}
                {% for field in form %}
                    <div class="form-group">
                        <label for="">{{ field.label }}</label>
                        {{ field }}
                        {% if  field.label == '用户名'%}
                            <span  class="pull-right" style="color: red">{{ field.errors.0 }}</span>
                        {% else %}
                            <span  class="pull-right" style="color: red">{{ clean_error.0 }}</span>
                        {% endif %}
                    </div>
                {% endfor %}

                <input type="submit" value="登陆" class="btn btn-success">
            </form>
        </div>
    </div>
</div>

</body>
</html>

 

posted @ 2019-08-16 10:47  毛斯钢  阅读(193)  评论(0编辑  收藏  举报