BeautifulSoup从javascript(编码)变量刮取
我正在抓取一个页面,无法获取某个字段,因为它存储在javascript变量中 我的问题是,如何刮取以下代码、解码并保存BeautifulSoup从javascript(编码)变量刮取,javascript,python,html,beautifulsoup,Javascript,Python,Html,Beautifulsoup,我正在抓取一个页面,无法获取某个字段,因为它存储在javascript变量中 我的问题是,如何刮取以下代码、解码并保存标记内容?使用BeautifulSoup和任何其他python 以下是标记内的代码: <script type="text/javascript"> var html_audition_details_sidebar = ' \u003Cdiv id\u003D\u0022apply_wrapper\u0022\u003E \u003Cdi
标记内容?使用BeautifulSoup和任何其他python
以下是
标记内的代码:
<script type="text/javascript">
var html_audition_details_sidebar = ' \u003Cdiv id\u003D\u0022apply_wrapper\u0022\u003E \u003Cdiv class\u003D\u0022header\u0022\u003E \u003Cp\u003EAudition Information\u003C/p\u003E \u003C/div\u003E \u003Cdiv class\u003D\u0022text \u0022\u003E \u003Cdiv class\u003D\u0022roleContainer \u0022 style\u003D\u0022color: #999\u003B font\u002Dsize: 14px\u003B\u0022\u003E \u003Cp\u003EOnly official members can see audition information for this job\u003C/p\u003E \u003C/div\u003E \u003C/div\u003E \u003Cdiv class\u003D\u0022applyButton\u0022\u003E \u003Cp\u003E\u003Ca class\u003D\u0022applyLink\u0022 href\u003D\u0022/accounts/login/apply/41680/\u0022\u003ESubscribe Now \u003C/a\u003E\u003C/p\u003E \u003C/div\u003E \u003C/div\u003E';
var html_additional_requirements = '';
var html_role_listing = '\u003Cdiv class\u003D\u0022text callListing loggedout \u0022\u003E \u003Cp class\u003D\u0022title\u0022\u003E\u003Ca name\u003D\u0022roles\u0022\u003E\u003C/a\u003ESeeking Talent \u003Cspan class\u003D\u0022optional\u0022\u003ESelect a role below for more information and submission instructions.\u003C/span\u003E\u003C/p\u003E \u003Cdiv class\u003D\u0022castingRoles\u0022\u003E \u003Cul\u003E \u003Cli \u003E \u003Ca href\u003D\u0022/casting/untitled\u002Dcomedy\u002Dshort\u002D41680/martinique\u002D159296/\u0022\u003E Martinique (Lead): \u003Cspan class\u003D\u0022roletag\u0022\u003E Female, 18\u002D25, Caucasian \u003C/span\u003E \u003Cspan class\u003D\u0022applyNow\u0022\u003E \u003C/span\u003E \u003C/a\u003E \u003Cp class\u003D\u0022role\u002Ddesc\u0022 style\u003D\u0022border\u002Dbottom: none\u003B padding\u002Dbottom: 0px\u003B margin\u002Dbottom: 0px\u003B\u0022\u003E native French speaker. \u003C/p\u003E \u003C/li\u003E \u003Cli \u003E \u003Ca href\u003D\u0022/casting/untitled\u002Dcomedy\u002Dshort\u002D41680/justin\u002D159297/\u0022\u003E Justin (Lead): \u003Cspan class\u003D\u0022roletag\u0022\u003E Male, 20\u002D25, All Ethnicities \u003C/span\u003E \u003Cspan class\u003D\u0022applyNow\u0022\u003E \u003C/span\u003E \u003C/a\u003E \u003Cp class\u003D\u0022role\u002Ddesc\u0022 style\u003D\u0022border\u002Dbottom: none\u003B padding\u002Dbottom: 0px\u003B margin\u002Dbottom: 0px\u003B\u0022\u003E comedy and improv skills, hopeless romantic. \u003C/p\u003E \u003C/li\u003E \u003Cli \u003E \u003Ca href\u003D\u0022/casting/untitled\u002Dcomedy\u002Dshort\u002D41680/flower\u002Dshop\u002Dsalesperson\u002D159299/\u0022\u003E Flower Shop Salesperson : \u003Cspan class\u003D\u0022roletag\u0022\u003E Males \u0026amp\u003B Females, 30+, All Ethnicities \u003C/span\u003E \u003Cspan class\u003D\u0022applyNow\u0022\u003E \u003C/span\u003E \u003C/a\u003E \u003Cp class\u003D\u0022role\u002Ddesc\u0022 style\u003D\u0022border\u002Dbottom: none\u003B padding\u002Dbottom: 0px\u003B margin\u002Dbottom: 0px\u003B\u0022\u003E impatient. \u003C/p\u003E \u003C/li\u003E \u003Cli \u003E \u003Ca href\u003D\u0022/casting/untitled\u002Dcomedy\u002Dshort\u002D41680/models\u002D159300/\u0022\u003E Models (Supporting): \u003Cspan class\u003D\u0022roletag\u0022\u003E Female, 18\u002D35, All Ethnicities \u003C/span\u003E \u003Cspan class\u003D\u0022applyNow\u0022\u003E \u003C/span\u003E \u003C/a\u003E \u003Cp class\u003D\u0022role\u002Ddesc\u0022 style\u003D\u0022border\u002Dbottom: none\u003B padding\u002Dbottom: 0px\u003B margin\u002Dbottom: 0px\u003B\u0022\u003E small roles, under five lines. \u003C/p\u003E \u003C/li\u003E \u003C/ul\u003E \u003C/div\u003E\u003C/div\u003E';
</script>
为此:
/casting/untitled-comedy-short-41680/martinique-159296/
提前感谢您的帮助 如果你想用一种通用的方式来做,你需要一个分析javascript的库。在本例中,我将使用 首先,加载数据:
from bs4 import BeautifulSoup as Soup
import slimit
from slimit.parser import Parser
from slimit.visitors import nodevisitor
a = """<script type="text/javascript">
var html_audition_details_sidebar = ' \u003Cdiv id\u003D\u0022apply_wrapper\u0022\u003E \u003Cdiv class\u003D\u0022header\u0022\u003E \u003Cp\u003EAudition Information\u003C/p\u003E \u003C/div\u003E \u003Cdiv class\u003D\u0022text \u0022\u003E \u003Cdiv class\u003D\u0022roleContainer \u0022 style\u003D\u0022color: #999\u003B font\u002Dsize: 14px\u003B\u0022\u003E \u003Cp\u003EOnly official members can see audition information for this job\u003C/p\u003E \u003C/div\u003E \u003C/div\u003E \u003Cdiv class\u003D\u0022applyButton\u0022\u003E \u003Cp\u003E\u003Ca class\u003D\u0022applyLink\u0022 href\u003D\u0022/accounts/login/apply/41680/\u0022\u003ESubscribe Now \u003C/a\u003E\u003C/p\u003E \u003C/div\u003E \u003C/div\u003E';
var html_additional_requirements = '';
var html_role_listing = '\u003Cdiv class\u003D\u0022text callListing loggedout \u0022\u003E \u003Cp class\u003D\u0022title\u0022\u003E\u003Ca name\u003D\u0022roles\u0022\u003E\u003C/a\u003ESeeking Talent \u003Cspan class\u003D\u0022optional\u0022\u003ESelect a role below for more information and submission instructions.\u003C/span\u003E\u003C/p\u003E \u003Cdiv class\u003D\u0022castingRoles\u0022\u003E \u003Cul\u003E \u003Cli \u003E \u003Ca href\u003D\u0022/casting/untitled\u002Dcomedy\u002Dshort\u002D41680/martinique\u002D159296/\u0022\u003E Martinique (Lead): \u003Cspan class\u003D\u0022roletag\u0022\u003E Female, 18\u002D25, Caucasian \u003C/span\u003E \u003Cspan class\u003D\u0022applyNow\u0022\u003E \u003C/span\u003E \u003C/a\u003E \u003Cp class\u003D\u0022role\u002Ddesc\u0022 style\u003D\u0022border\u002Dbottom: none\u003B padding\u002Dbottom: 0px\u003B margin\u002Dbottom: 0px\u003B\u0022\u003E native French speaker. \u003C/p\u003E \u003C/li\u003E \u003Cli \u003E \u003Ca href\u003D\u0022/casting/untitled\u002Dcomedy\u002Dshort\u002D41680/justin\u002D159297/\u0022\u003E Justin (Lead): \u003Cspan class\u003D\u0022roletag\u0022\u003E Male, 20\u002D25, All Ethnicities \u003C/span\u003E \u003Cspan class\u003D\u0022applyNow\u0022\u003E \u003C/span\u003E \u003C/a\u003E \u003Cp class\u003D\u0022role\u002Ddesc\u0022 style\u003D\u0022border\u002Dbottom: none\u003B padding\u002Dbottom: 0px\u003B margin\u002Dbottom: 0px\u003B\u0022\u003E comedy and improv skills, hopeless romantic. \u003C/p\u003E \u003C/li\u003E \u003Cli \u003E \u003Ca href\u003D\u0022/casting/untitled\u002Dcomedy\u002Dshort\u002D41680/flower\u002Dshop\u002Dsalesperson\u002D159299/\u0022\u003E Flower Shop Salesperson : \u003Cspan class\u003D\u0022roletag\u0022\u003E Males \u0026amp\u003B Females, 30+, All Ethnicities \u003C/span\u003E \u003Cspan class\u003D\u0022applyNow\u0022\u003E \u003C/span\u003E \u003C/a\u003E \u003Cp class\u003D\u0022role\u002Ddesc\u0022 style\u003D\u0022border\u002Dbottom: none\u003B padding\u002Dbottom: 0px\u003B margin\u002Dbottom: 0px\u003B\u0022\u003E impatient. \u003C/p\u003E \u003C/li\u003E \u003Cli \u003E \u003Ca href\u003D\u0022/casting/untitled\u002Dcomedy\u002Dshort\u002D41680/models\u002D159300/\u0022\u003E Models (Supporting): \u003Cspan class\u003D\u0022roletag\u0022\u003E Female, 18\u002D35, All Ethnicities \u003C/span\u003E \u003Cspan class\u003D\u0022applyNow\u0022\u003E \u003C/span\u003E \u003C/a\u003E \u003Cp class\u003D\u0022role\u002Ddesc\u0022 style\u003D\u0022border\u002Dbottom: none\u003B padding\u002Dbottom: 0px\u003B margin\u002Dbottom: 0px\u003B\u0022\u003E small roles, under five lines. \u003C/p\u003E \u003C/li\u003E \u003C/ul\u003E \u003C/div\u003E\u003C/div\u003E';
</script>"""
soup = Soup(a)
js_content = soup.findAll('script')[0].text
最后,您可以轻松解码该字符串,它是有效的HTML:
decoded_html = encoded_html.decode('unicode_escape')
print(decoded_html)
因此,请重新分析此HTML:
role_listing = Soup(decoded_html)
output = [ anchor.attrs['href'] for anchor in role_listing.select('li a') ]
print('---')
print("\n".join(output))
输出如下所示:
'<div class="text callListing loggedout "> <p class="title"><a name="roles"></a>Seeking Talent <span class="optional">Select a role below for more information and submission instructions.</span></p> <div class="castingRoles"> <ul> <li > <a href="/casting/untitled-comedy-short-41680/martinique-159296/"> Martinique (Lead): <span class="roletag"> Female, 18-25, Caucasian </span> <span class="applyNow"> </span> </a> <p class="role-desc" style="border-bottom: none; padding-bottom: 0px; margin-bottom: 0px;"> native French speaker. </p> </li> <li > <a href="/casting/untitled-comedy-short-41680/justin-159297/"> Justin (Lead): <span class="roletag"> Male, 20-25, All Ethnicities </span> <span class="applyNow"> </span> </a> <p class="role-desc" style="border-bottom: none; padding-bottom: 0px; margin-bottom: 0px;"> comedy and improv skills, hopeless romantic. </p> </li> <li > <a href="/casting/untitled-comedy-short-41680/flower-shop-salesperson-159299/"> Flower Shop Salesperson : <span class="roletag"> Males & Females, 30+, All Ethnicities </span> <span class="applyNow"> </span> </a> <p class="role-desc" style="border-bottom: none; padding-bottom: 0px; margin-bottom: 0px;"> impatient. </p> </li> <li > <a href="/casting/untitled-comedy-short-41680/models-159300/"> Models (Supporting): <span class="roletag"> Female, 18-35, All Ethnicities </span> <span class="applyNow"> </span> </a> <p class="role-desc" style="border-bottom: none; padding-bottom: 0px; margin-bottom: 0px;"> small roles, under five lines. </p> </li> </ul> </div></div>'
---
/casting/untitled-comedy-short-41680/martinique-159296/
/casting/untitled-comedy-short-41680/justin-159297/
/casting/untitled-comedy-short-41680/flower-shop-salesperson-159299/
/casting/untitled-comedy-short-41680/models-159300/
母语为法语的人 喜剧和即兴表演技巧,无望的浪漫 不耐烦 小角色,五行以下 '
---
/演员阵容/无标题喜剧短片-41680/马提尼克岛-159296/
/演员阵容/无标题喜剧短片-41680/justin-159297/
/演员阵容/无标题喜剧短片-41680/花店销售员-159299/
/演员/无标题-喜剧-短片-41680/模特-159300/
无需JS解析器 我假设您知道您的
内容将按照示例中的格式进行格式化,并且您已经将该标记的内容刮到了一个名为script\u text
的变量中
首先,我们需要获取html\u role\u listing
的值,这可以通过一个好的ol'正则表达式来实现:
>>> import re
>>> html_role_listing_match = re.search(r'var html_role_listing = \'(.+)\';$', script_text, re.MULTILINE)
>>> html_role_listing = html_role_listing_match.group(1)
然后,我们利用\u003C
和类似的转义序列在Python Unicode字符串中也有效的事实(就像它们在JS字符串中有效一样),并使用更安全的eval
版本解析它们:
>>> import ast
>>> roles_html = ast.literal_eval("u'%s'" % html_role_listing)
为了向您自己证明这一点,您可以检查此文件的前几个字符,并查看它们是否已正确解析:
>>> print roles_html[:10]
<div class
并获取这些链接“href
属性”
>>> links = soup.select('li a')
>>> for link in links:
... print link.attrs['href']
...
/casting/untitled-comedy-short-41680/martinique-159296/
/casting/untitled-comedy-short-41680/justin-159297/
/casting/untitled-comedy-short-41680/flower-shop-salesperson-159299/
/casting/untitled-comedy-short-41680/models-159300/
>>> print roles_html[:10]
<div class
>>> from bs4 import BeautifulSoup
>>> soup = BeautifulSoup(roles_html)
>>> links = soup.select('li a')
>>> for link in links:
... print link.attrs['href']
...
/casting/untitled-comedy-short-41680/martinique-159296/
/casting/untitled-comedy-short-41680/justin-159297/
/casting/untitled-comedy-short-41680/flower-shop-salesperson-159299/
/casting/untitled-comedy-short-41680/models-159300/