python(Django之组合搜索、JSONP、XSS过滤 )

2023-07-26 20:39:34

一、组合搜索

二、jsonp

三、xss过滤

一、组合搜索

　　首先，我们在做一个门户网站的时候，前端肯定是要进行搜索的，但是如果搜索的类型比较多的话，怎么做才能一目了然的，这样就引出了组合搜索的这个案例。

　　urls.py　

from django.conf.urls import url

from . import views

urlpatterns = [

    url(r'^index.html/$',views.index),

    url(r'^article/(?P<article_type>\d+)-(?P<category>\d+).html/$',views.article)

]

　　html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

    <style>

        .condition a{

            display:inline-block;

            padding: 3px 5px;

            border: 1px solid black;

        }

        .condition a.active{

            background-color: brown;

        }

    </style>

</head>

<body>

    <h2>过滤条件</h2>

    <div class="condition">

        {% if kwargs.article_type == 0 %}

            <a href="/article/0-{{ kwargs.category }}.html" class="active">全部</a>

        {% else %}

            <a href="/article/0-{{ kwargs.category }}.html">全部</a>

        {% endif %}

        {% for row in article_type %}

            {% if row.id == kwargs.article_type %}

                <a class="active" href="/article/{{ row.id }}-{{ kwargs.category }}.html">{{ row.caption }}</a>

            {% else %}

                <a  href="/article/{{ row.id }}-{{ kwargs.category }}.html">{{ row.caption }}</a>

            {% endif %}

        {% endfor %}

    </div>

    <div class="condition">

        {% if kwargs.category == 0 %}

            <a class="active" href="/article/{{ kwargs.article_type }}-0.html">全部</a>

        {% else %}

            <a href="/article/{{ kwargs.article_type }}-0.html">全部</a>

        {% endif %}

        {% for row in category %}

            {% if row.id == kwargs.category %}

                <a class="active" href="/article/{{ kwargs.article_type }}-{{ row.id }}.html">{{ row.caption }}</a>

            {% else %}

                <a href="/article/{{ kwargs.article_type }}-{{ row.id }}.html">{{ row.caption }}</a>

            {% endif %}

        {% endfor %}

    </div>

    <h2>查询结果</h2>

    <ul>

    {% for row in articles %}

        <li>{{ row.id }}-{{ row.title }}------[{{ row.article_type.caption }}]-[{{ row.category.caption }}]</li>

    {% endfor %}

    </ul>

</body>

</html>

article.html

数据库结构：

from django.db import models

# Create your models here.

class Categoery(models.Model):

    caption = models.CharField(max_length=16)

class ArticleType(models.Model):

    caption = models.CharField(max_length=16)

class Article(models.Model):

    title = models.CharField(max_length=32)

    content = models.CharField(max_length=255)

    category = models.ForeignKey(Categoery)

    article_type = models.ForeignKey(ArticleType)

处理文件：

 from . import  models

 def article(request,*args,**kwargs):

     search_dict = {}

     for key,value in kwargs.items():

         kwargs[key] = int(value)        # 把字符类型转化为int类型 方便前端做if a == b  这样的比较

         if value !='':

             search_dict[key] = value

     articles = models.Article.objects.filter(**search_dict) # 字典为空时表示搜索所有

     article_type = models.ArticleType.objects.all()

     category = models.Categoery.objects.all()

     return render(request,'article.html',{'articles':articles,

                                           'article_type':article_type,

                                          'category':category ,

                                           'kwargs':kwargs})

　　访问的url访问路径格式http://127.0.0.1:8000/article/0-0.html ，第一个0表示article_type字段，第二个0表示category字段，如果为零时，表示搜索此字段全部信息，第二个关键点是生成字典search_dict进行相关的搜索，如果是0表示搜索全部；第三个关键点，也是很巧妙的一个方式，把参数kwargs再次传到前端！

3、simple_tag优化上面的功能：

　　数据库文件：

from django.db import models

# Create your models here.

class Categoery(models.Model):

    caption = models.CharField(max_length=16)

class ArticleType(models.Model):

    caption = models.CharField(max_length=16)

class Article(models.Model):

    title = models.CharField(max_length=32)

    content = models.CharField(max_length=255)

    category = models.ForeignKey(Categoery)

    article_type = models.ForeignKey(ArticleType)

    # type_choice  = [

    #     (1,'Python'),

    #     (2,'Linux'),

    #     (3,'大数据'),

    #     (4,'架构'),

    # ]

    # article_type_id = models.IntegerField(choices=type_choice)

　　后台处理：

from django.shortcuts import render

from django.shortcuts import HttpResponse

# Create your views here.

def index(request):

    return HttpResponse('Ok')

from . import models

def article(request, *args, **kwargs):

    search_dict = {}

    for key, value in kwargs.items():

        kwargs[key] = int(value)  # 把字符类型转化为int类型 方便前端做if a == b  这样的比较

        if value != '':

            search_dict[key] = value

    articles = models.Article.objects.filter(**search_dict)  # 字典为空时表示搜索所有

    article_type = models.ArticleType.objects.all()

    print(article_type)

    category = models.Categoery.objects.all()

    return render(request, 'article.html', {'articles': articles,

                                            'article_type': article_type,

                                            'category': category,

                                            'kwargs': kwargs})

Views.py

{% load filter %}

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

    <style>

        .condition a{

            display:inline-block;

            padding: 3px 5px;

            border: 1px solid black;

        }

        .condition a.active{

            background-color: brown;

        }

    </style>

</head>

<body>

    <h2>过滤条件</h2>

    <div class="condition">

        {% filter_all  kwargs 'article_type'%}

        {% filter_single article_type kwargs 'article_type'%}

    </div>

    <div class="condition">

        {% filter_all  kwargs 'category'%}

        {% filter_single category kwargs 'category'%}

    </div>

    <h2>查询结果</h2>

    <ul>

    {% for row in articles %}

        <li>{{ row.id }}-{{ row.title }}------[{{ row.article_type.caption }}]-[{{ row.category.caption }}]</li>

    {% endfor %}

    </ul>

</body>

</html>

article.html

　　创建templatetags目录，在目录下创建filter.py文件

from django import template

from django.utils.safestring import mark_safe

register = template.Library()

@register.simple_tag

def filter_all(kwargs,type_str):

    print(type_str)

    if type_str == 'article_type':

        if kwargs['article_type'] == 0:

            tmp = '<a href = "/article/0-%s.html" class ="active" > 全部 </a>'%(kwargs['category'])

        else:

            tmp = '<a href = "/article/0-%s.html"> 全部 </a>'%(kwargs['category'])

    elif type_str == 'category':

        if kwargs['category'] == 0:

            tmp = '<a href = "/article/%s-0.html" class ="active" > 全部 </a>' % (kwargs['article_type'])

        else:

            tmp = '<a href = "/article/%s-0.html"> 全部 </a>' % (kwargs['article_type'])

    return mark_safe(tmp)

@register.simple_tag()

def filter_single(type_obj,kwargs,type_str):

    print(type_str)

    tmp = ''

    if type_str == 'article_type':

        for row in type_obj:

            if row.id == kwargs['article_type']:

                tag = '<a class="active" href="/article/%s-%s.html">%s</a>\n'%(row.id,kwargs['category'],row.caption)

            else:

                tag = '<a href="/article/%s-%s.html">%s</a>\n' % (row.id, kwargs['category'],row.caption)

            tmp +=tag

    elif type_str == 'category':

        for row in type_obj:

            if row.id == kwargs['category']:

                tag = '<a class="active" href="/article/%s-%s.html">%s</a>\n' % (kwargs['article_type'],row.id, row.caption)

            else:

                tag = '<a href="/article/%s-%s.html">%s</a>\n' % (kwargs['article_type'], row.id, row.caption)

            tmp += tag

    return mark_safe(tmp)

filter.py

{% load filter %}

<body>

    <h2>过滤条件</h2>

    <div class="condition">

        {% filter_all  kwargs 'article_type'%}

        {% filter_single article_type kwargs 'article_type'%}

    </div>

    <div class="condition">

        {% filter_all  kwargs 'category'%}

        {% filter_single category kwargs 'category'%}

    </div>

    <h2>查询结果</h2>

    <ul>

    {% for row in articles %}

        <li>{{ row.id }}-{{ row.title }}------[{{ row.article_type.caption }}]-[{{ row.category.caption }}]</li>

    {% endfor %}

    </ul>

</body>

article.html

二、jsonp

　　JSONP(JSON with Padding)是JSON的一种“使用模式”，可用于解决主流浏览器的跨域数据访问的问题。由于同源策略，一般来说位于 server1.example.com 的网页无法与不是 server1.example.com的服务器沟通，而 HTML 的<script> 元素是一个例外。利用 <script> 元素的这个开放策略，网页可以得到从其他来源动态产生的 JSON 资料，而这种使用模式就是所谓的 JSONP。用 JSONP 抓到的资料并不是 JSON，而是任意的JavaScript，用 JavaScript 直译器执行而不是用 JSON 解析器解析。

原理：

- 创建script标签
- src=远程地址
- 返回的数据必须是js格式
- 只能发GET请求

1、什么是同源策略？

import requests

def jsonp(request):

    # 获取url信息

    response = requests.get('http://weatherapi.market.xiaomi.com/wtr-v2/weather?cityId=101121301')

    response.encoding = 'utf-8'     # 进行编码

    return render(request,'jsonp.html',{'result':response.text})  # response.text 请求内容

处理文件

<body>

    <h1>后台获取的结果</h1>

    {{ result }}

    <h1>js直接获取结果</h1>

    <input type="button" value="获取数据" onclick="getContent();" />

    <div id="container"></div>

    <script src="/static/jquery-1.8.2.js"></script>

    <script>

        function getContent() {

            var xhr = new XMLHttpRequest();         // 创建对象

            xhr.open('GET', 'http://weatherapi.market.xiaomi.com/wtr-v2/weather?cityId=101121301'); // GET方式打开

            xhr.onreadystatechange = function () {　　// 收到返回值时执行

                console.log(xhr.responseText);

            };

            xhr.send()　　// 发送

        }

    </script>

</body>

html

　　点击js直接获取结果时，浏览器显示下面报错信息，由于浏览器只接受http://127.0.0.1:8000发过来的信息，对于天气网站发过来的信息直接屏蔽掉了，这就是同源策略，解决办法如下：

XMLHttpRequest cannot load http://weatherapi.market.xiaomi.com/wtr-v2/weather?cityId=101121301. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.

利用script标签src属性

　　注意：script标签不受同源策略的影响

import requests

def jsonp(request):

    # 获取url信息

    response = requests.get('http://weatherapi.market.xiaomi.com/wtr-v2/weather?cityId=101121301')

    response.encoding = 'utf-8'     # 进行编码

    return render(request,'jsonp.html',{'result':response.text})  # response.text 请求内容

def jsonp_api(request):

    return HttpResponse('alert(123)')

处理文件

<body>

    <h1>后台获取的结果</h1>

    {{ result }}

    <h1>js直接获取结果</h1>

    <input type="button" value="获取数据" onclick="getContent();" />

    <div id="container"></div>

    <script>

        function getContent() {

            var tag = document.createElement('script');

            tag.src = '/jsonp_api.html';

            document.head.appendChild(tag);

         //   document.head.removeChild(tag);

        }

    </script>

</body>

html文件

　　注：js请求时为了方便，请求的还是当前程序url；点击按钮后alert弹出了另外一个函数的处理结果，表明script获取信息成功

　　对上面的处理文件稍加改动

def jsonp(request):

    return render(request,'jsonp.html')  # response.text 请求内容

def jsonp_api(request):

    func = request.GET.get('callback')  # 获取用户callback参数

    content = '%s(10000)'%func          # 执行func（10000）函数

    return HttpResponse(content)

处理文件

<body>

    <h1>后台获取的结果</h1>

    {{ result }}

    <h1>js直接获取结果</h1>

    <input type="button" value="获取数据" onclick="getContent();" />

    <div id="container"></div>

    <script>

        function getContent() {

            var tag = document.createElement('script');

            tag.src = '/jsonp_api.html?callback=list';  // 自定义callback参数，与后台达成默契

            document.head.appendChild(tag);

         //   document.head.removeChild(tag);

        }

        function list(arg){         // 自定义函数与callback=list相对应

               alert(arg);

            }

    </script>

</body>

html

　　js发请求时，带上callback参数，然后定义参数对应的方法，后台会把数据传入此方法内并且执行执行；至于要打印还是弹框，就看用户自己的需求去处理了；jsonp的原理和实现过程就是上述代码的实现

加上ajax：

import requests

def jsonp(request):

    response = requests.get('http://www.jxntv.cn/data/jmd-jxtv2.html?callback=list&_=1454376870403')

    response.encoding = 'utf-8'  # 进行编码

    return render(request, 'jsonp.html', {'result': response.text})  # response.text 请求内容

处理文件

<body>

    <h1>后台获取的结果</h1>

    {{ result }}

    <h1>js直接获取结果</h1>

    <input type="button" value="获取数据" onclick="getContent();" />

    <div id="container"></div>

    <script src="/static/jquery-1.8.2.js"></script>

    <script>

        function getContent() {

            $.ajax({

                url: 'http://www.jxntv.cn/data/jmd-jxtv2.html?callback=list&_=1454376870403',

                type: 'POST',

                dataType: 'jsonp',     // 即使写的type是POST也是按照GET请求发送

                jsonp: 'callback',

                jsonpCallback: 'list'

            });

        }

        function list(arg){         // 自定义函数与callback=list相对应

            console.log(arg);

            var data = arg['data'];

            for(k in data){

                var tr = document.createElement('td');

                var week = data[k]['week'];

                var list = data[k]['list'];

                tr.textContent =week

                document.body.appendChild(tr);

                console.log(week);

                for(i in list){

                    var name = list[i]['name'];

                    console.log(name)

        }}}

    </script>

</body>

html

list({data:[ { "week":"周日", "list":[ { "time":"", "name":"通宵剧场六集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》60分钟精编版（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《e早晨报》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"精选剧场四集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市60分》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《谁是赢家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"女性剧场三集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》精编版", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》90分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市情缘》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《晚间800》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第1集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第2集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《拍案》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"江西新闻联播(重播)", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"都市晚剧场", "link":"http://www.jxntv.cn/live/jxtv2.shtml" } ] }, { "week":"周一", "list":[ { "time":"", "name":"通宵剧场六集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》60分钟精编版（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《e早晨报》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"精选剧场四集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市60分》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《谁是赢家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"女性剧场三集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》精编版", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》90分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市情缘》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《晚间800》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第1集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第2集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《拍案》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"江西新闻联播(重播)", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"都市晚剧场", "link":"http://www.jxntv.cn/live/jxtv2.shtml" } ] },{ "week":"周二", "list":[ { "time":"", "name":"通宵剧场六集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》60分钟精编版（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《e早晨报》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"精选剧场四集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市60分》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《谁是赢家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"女性剧场三集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》精编版", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》90分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市情缘》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《晚间800》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第1集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第2集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《拍案》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"江西新闻联播(重播)", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"都市晚剧场", "link":"http://www.jxntv.cn/live/jxtv2.shtml" } ] },{ "week":"周三", "list":[ { "time":"", "name":"通宵剧场六集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》60分钟精编版（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《e早晨报》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"精选剧场四集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市60分》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《谁是赢家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"女性剧场三集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》精编版", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》90分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市情缘》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《晚间800》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第1集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第2集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《拍案》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"江西新闻联播(重播)", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"都市晚剧场", "link":"http://www.jxntv.cn/live/jxtv2.shtml" } ] },{ "week":"周四", "list":[ { "time":"", "name":"通宵剧场六集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》60分钟精编版（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《e早晨报》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"精选剧场四集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市60分》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《谁是赢家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"女性剧场三集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》精编版", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》90分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市情缘》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《晚间800》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第1集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第2集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《拍案》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"江西新闻联播(重播)", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"都市晚剧场", "link":"http://www.jxntv.cn/live/jxtv2.shtml" } ] },{ "week":"周五", "list":[ { "time":"", "name":"通宵剧场六集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》60分钟精编版（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《e早晨报》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"精选剧场四集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市60分》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《谁是赢家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"女性剧场三集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》精编版", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》90分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市情缘》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《晚间800》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第1集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第2集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《拍案》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"江西新闻联播(重播)", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"都市晚剧场", "link":"http://www.jxntv.cn/live/jxtv2.shtml" } ] },{ "week":"周六", "list":[ { "time":"", "name":"通宵剧场六集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》60分钟精编版（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《e早晨报》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"精选剧场四集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》（重播）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市60分》60分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《谁是赢家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"女性剧场三集连播", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《快乐生活一点通》精编版", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《地宝当家》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市现场》90分钟直播版块", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市情缘》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《晚间800》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第1集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《都市剧场》黄金剧（第2集）", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"《拍案》", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"江西新闻联播(重播)", "link":"http://www.jxntv.cn/live/jxtv2.shtml" }, { "time":"", "name":"都市晚剧场", "link":"http://www.jxntv.cn/live/jxtv2.shtml" } ] }] });

获取到的网站最近栏目信息

三、xss过滤

　　分析：

　　例如，我们在博客网站发表了一篇论文，结果这里面有很多我们写的代码，那为什么浏览器不会把我们写的代码处理呢，而是当做一个纯字符串处理。还有就是总有人评论的时候想搞点xss攻击，那浏览器又是怎么知道这些“违法”代码不处理的呢，所以引出了xss过滤。

　　示例一：简单的标签过滤

　　　　注意：提前安装BeautifulSoup

pip install beatifulsoup4

html = '''

<p class="story">

    <a href="http://example.com/lacie" class="sister" id="link2">Lacie</a> and

    <div name='root'>Once upon a time there w</div>

</p>

<p>

    <div>Once upon a time there w</div>

</p>

<script>alert(123)</script>

'''

html

　　清空<script>标签、a标签的class属性：

 from bs4 import BeautifulSoup

 soup = BeautifulSoup(html,'html.parser')   # html.parser内部解析器 会把字符串转化成有结构的文档

 tag = soup.find('script')       # tag <script>alert(123)</script> 找到的标签

 tag.hidden = True               # <script>标签消失

 tag.clear()                     # 清空标签内容

 a = soup.find('a')              # 删除a标签的class属性

 del a.attrs['class']         # {'href': 'http://example.com/lacie', 'id': 'link2', 'class': ['sister']}

 content = soup.decode()         # 把对象转化为字符串

 print(content)

 '''

 <p class="story">

 <a href="http://example.com/lacie" id="link2">Lacie</a> and

     <div name="root">Once upon a time there w</div>

 </p>

 <p>

 <div>Once upon a time there w</div>

 </p>

 '''

后台处理

　　通过白名单进行操作：

from bs4 import BeautifulSoup

tags ={              # 设置白名单

   'p':['class'],

    'div':['id']

}

soup = BeautifulSoup(html,'html.parser')    # html.parser内部解析器 会把字符串转化成有结构的文档

for tag in soup.find_all():                 # tag.name 先找子子孙孙、然后再往下找

    if tag.name in tags:                    # p a div p div script   一次循环的标签

        for k in list(tag.attrs.keys()):        # 不在白名单对应的属性进行删除

            if k not in tags[tag.name]:

               del tag.attrs[k]

    else:                                   # 不在白名单的标签删除

        tag.hidden = True

        tag.clear()

content = soup.decode()         # 把对象转化为字符串

print(content)

'''

<p class="story">

 and

    <div>Once upon a time there w</div>

</p>

<p>

<div>Once upon a time there w</div>

</p>

'''

后台处理

　　博客XSS过滤　

　　XSSFilter文件：

from bs4 import BeautifulSoup

class XSSFilter(object):

    __instance = None

    def __init__(self):

        # XSS白名单

        self.valid_tags = {

            "font": ['color', 'size', 'face', 'style'],

            'b': [],

            'div': [],

            "span": [],

            "table": [

                'border', 'cellspacing', 'cellpadding'

            ],

            'th': [

                'colspan', 'rowspan'

            ],

            'td': [

                'colspan', 'rowspan'

            ],

            "a": ['href', 'target', 'name'],

            "img": ['src', 'alt', 'title'],

            'p': [

                'align'

            ],

            "pre": ['class'],

            "hr": ['class'],

            'strong': []

        }

    def __new__(cls, *args, **kwargs):

        """

        单例模式

        :param cls:

        :param args:

        :param kwargs:

        :return:

        """

        if not cls.__instance:

            obj = object.__new__(cls, *args, **kwargs)

            cls.__instance = obj

        return cls.__instance

    def process(self, content):

        soup = BeautifulSoup(content, 'html.parser')

        # 遍历所有HTML标签

        for tag in soup.find_all(recursive=True):

            # 判断标签名是否在白名单中

            if tag.name not in self.valid_tags:

                tag.hidden = True

                if tag.name not in ['html', 'body']:

                    tag.hidden = True

                    tag.clear()

                continue

            # 当前标签的所有属性白名单

            attr_rules = self.valid_tags[tag.name]

            keys = list(tag.attrs.keys())

            for key in keys:

                if key not in attr_rules:

                    del tag[key]

        return soup.decode()

content = form.cleaned_data.pop('content')      # 移出 content需要在表ArticleDetail上手动添加、关联Article

content = XSSFilter().process(content)           # 对content进行数据过滤  过滤到script等标签

调用方式

　　上面代码用到了面向对象的单例模式-》》http://www.cnblogs.com/lianzhilei/p/5838821.html

码农公寓

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