django安全－xss和csrf

XSS

XSS跨站脚本攻击(Cross Site Scripting)，为不和层叠样式表(Cascading Style Sheets, CSS)的缩写混淆，故将跨站脚本攻击缩写为XSS。恶意攻击者往Web页面里插入恶意Script代码，当用户浏览该页之时，嵌入其中Web里面的Script代码会被执行，从而达到恶意攻击用户的目的。
 
 1 ##############xss攻击#############
 2 
 3 
 4 ****************************************
 5 #不带if判断进行关键字过滤代码
 6 msg=[]
 7 def comment(request):
 8     if request.method =="GET":
 9         return render(request,'comment.html')
10     else:
11         v = request.POST.get('content')
12         msg.append(v)
13         return render(request,'comment.html')
14 def index(request):
15     return render(request,'index.html',{'msg':msg})
16 *****************************************
17 
18 *****************************************
19 #带if判断进行关键字过滤代码
20 msg=[]
21 def comment(request):
22     if request.method =="GET":
23         return render(request,'comment.html')
24     else:
25         v = request.POST.get('content')
26         if "script" in v:
27             return render(request,'comment.html',{'error':'黑你大爷'})
28         else:
29             msg.append(v)
30             return render(request, 'comment.html')
31 def index(request):
32     return render(request,'index.html',{'msg':msg})
33 *********************************************
34 
35 *********************************************
36 #测试：
37 
38 def test(request):
39     from django.utils.safestring import mark_safe
40     temp = "<a href='http://www.baidu.com'>百度</a>"
41     newtemp = mark_safe(temp)
42     return render(request, 'test.html', {'temp': newtemp})
43 
44 ********************************************
45 注：
46 
47 # 1.用<script>alert(11222)</script>模拟攻击代码
48 # 2.过滤攻击方式：
49                          a.在接受评论端（前端代码）不要写 |safe. 
50                          比如：<div>{{ item|safe }}</div>
51 
52                          #b.在后台代码中进行if关键字过滤判断
53 
54 
55   3.test.html：
56                 # 里面如果不加|safe,渲染出来的只是普通字符“
57                       <a  href='http://www.baidu.com'>百度</a>”
58                 # 如果加|safe,渲染出来的是<a>标签连接
59                 #后端标记字符串安全：
60                  （前端不加safe,后端加safe）
61                 #导入模块 ：from django.utils.safestring import mark_safe
62                 #说明安全：ewtemp = mark_safe(temp)
63 
64 Views
Views.py
 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Title</title>
 6 </head>
 7 <body>
 8     <form method="POST" action="/comment/">
 9         <input type="text" name="content">
10         <input type="submit" value="提交"/>{{ error }}
11     </form>
12 </body>
13 </ht
14 
15 comment.html
comment.html
 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Title</title>
 6 </head>
 7 <body>
 8     <h3>评论</h3>
 9     {% for item in msg %}
10 
11         <div>{{ item }}</div>
12 
13 {#         <div>{{ item|safe }}</div>#}
14 
15     {% endfor %}
16 </body>
17 </ht
18 
19 index.html
index.html
 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Title</title>
 6 </head>
 7 <body>
 8 {#    {{ temp|safe }}#}
 9         {{ temp }}
10 </body>
11 </htm
12 
13 test.html
test.html
 1 """day73 URL Configuration
 2 
 3 The `urlpatterns` list routes URLs to views. For more information please see:
 4     https://docs.djangoproject.com/en/1.10/topics/http/urls/
 5 Examples:
 6 Function views
 7     1. Add an import:  from my_app import views
 8     2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
 9 Class-based views
10     1. Add an import:  from other_app.views import Home
11     2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
12 Including another URLconf
13     1. Import the include() function: from django.conf.urls import url, include
14     2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
15 """
16 from django.conf.urls import url
17 from django.contrib import admin
18 
19 from app01 import views
20 
21 
22 urlpatterns = [
23     url(r'^admin/', admin.site.urls),
24     url(r'^test/',views.test),
25     url(r'^comment/',views.comment),
26     url(r'^index/',views.index),
27 
28 ]
29 
30 urls
路由

 

CSRF

CSRF（Cross-site request forgery）跨站请求伪造，也被称为“One Click Attack”或者Session Riding，通常缩写为CSRF或者XSRF，是一种对网站的恶意利用。尽管听起来像跨站脚本（XSS），但它与XSS非常不同，XSS利用站点内的信任用户，而CSRF则通过伪装来自受信任用户的请求来利用受信任的网站。与XSS攻击相比，CSRF攻击往往不大流行（因此对其进行防范的资源也相当稀少）和难以防范，所以被认为比XSS更具危险性。

解决方案：

方式一：form表单内第一行添加

# { % csrf_token %}

方式二：全局禁用，在设置settings文件中中间件部分找到如下csrf注释掉

# 'django.middleware.csrf.CsrfViewMiddleware',

方式三：模块装饰器局部禁用

# 'django.middleware.csrf.CsrfViewMiddleware',
先注释掉全局
# from django.views.decorators.csrf import csrf_exempt
# @csrf_exempt
# def csrf1(request):
#     if request.method == 'GET':
#         return render(request, 'csrf1.html')
#     else:
#         return HttpResponse('ok')

　　

# ****************局部使用*************************
# d.（全站禁用前提下可以使用局部使用）
# 'django.middleware.csrf.CsrfViewMiddleware',
# from django.views.decorators.csrf import csrf_protect
# @csrf_protect
# def csrf1(request):
#     if request.method == 'GET':
#         return render(request, 'csrf1.html')
#     else:
#         return HttpResponse('ok')
# ************************************************

　　

CBV中添加装饰器
#****************CBV中添加装饰器********************
# c.特殊CBV
# from django.views import View
# from django.utils.decorators import method_decorator
# @method_decorator(csrf_protect, name='dispatch')
# class Foo(View):
#     def get(self, request):
#         pass
#
#     def post(self, request):
#         pass
  
  
# def wrapper(func):
#      def inner(*args,**kwargs):
#          return func(*args,**kwargs)
#      return inner
 # 1. 指定方法上添加装饰器
    # class Foo(View):
  
    #     @method_decorator(wrapper)
    #     def get(self,request):
    #         pass
  
    #     def post(self,request):
    #         pass
# 2. 在类上添加
    #     @method_decorator(wrapper,name='dispatch')     #全部类添加
    #     @method_decorator(wrapper, name='get')         # 只给get添加
    #     @method_decorator(wrapper, name='post')        # 只给post添加
    #     class Foo(View):
  
    #         def dispatch(self,request,*args,**kwargs)
    #               pass
  
    #         def get(self,request):
    #             pass
  
    #         def post(self,request):
    #             pass

　　

注意ajax 请求：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form method="POST" action="/csrf1.html/">
        {% csrf_token %}
        <input type="text" name="user">
        <input type="submit" value="提交"/>
        <a onclick="submitForm();">Ajax提交</a>
    </form>
<script src="/static/jquery-3.2.1.js"></script>
<script src="/static/jquery.cookie.js"></script>
<script>
  
第一种方式：
    function submitForm() {
        var csrf = $('input[name="csrfmiddlewaretoken"]').val();
        var user = $('#user').val();
        $.ajax({
            url:'/csrf1.html',
            type:'POST',
            data:{"user":user,'csrfmiddlewaretoken':csrf},
            success:function (arg) {
                console.log(arg);
            }
  
        })
    }
    
  
第二种方式：
{#    获取Console值：在浏览器Console上输入document.cookie#}
    function submitForm() {
        var token = $.cookie('csrftoken');
        var csrf = $('input[name="csrfmiddlewaretoken"]').val();
        var user = $('#user').val();
        $.ajax({
            url:'/csrf1.html',
            type:'POST',
            headers:{'X-CSRFToken':token},
            data:{"user":user},
            success:function (arg) {
                console.log(arg);
            }
        })
    }
  
</script>
</body>
</html>

　　

def csrf1(request):
     if request.method == 'GET':
         return render(request,'csrf1.html')
     else:
         return HttpResponse('哥们干啥来了')

　　

 

 

 
 

 

posted @ 2017-07-09 19:05  Adamanter  阅读(115)  评论(0)  编辑  收藏  举报