从html中提取数组元素

我使用urlopen和beautifulsoup4来获取网页的内容。我要抓取的网页会生成一些动态的JavaScript块。我想提取整个数组的内容。从html中提取数组元素

阵列是按以下格式：

<script type="text/javascript"> 
var jobmap = {}; 
jobmap[0]= {jk:'929a2508c8bf2c9c',efccid: '28d4bd688c1e4e86',srcid:'4beb17a7fc4b64e2',cmpid:'be1c2a3db344744f',num:'0',srcname:'City of Oshawa',cmp:'City of Oshawa',cmpesc:'City of Oshawa',cmplnk:'/City-of-Oshawa-jobs-in-Ontario',loc:'Oshawa, ON',country:'CA',zip:'',city:'Oshawa',title:'Systems Analyst',locid:'da5ca33120fa5fe5',rd:'8i0xAbEkuWUhy6dasPEQkceDzWLtCZmZLj2Y-bGYlQI'}; 
jobmap[1]= {jk:'2d06bbaac441e7d2',efccid: 'beb412fe8b0feacc',srcid:'0a0f0bf6b7639c78',cmpid:'0c05d4e9f9f0206d',num:'1',srcname:'FGL Sports Ltd.',cmp:'FGL Sports Ltd.',cmpesc:'FGL Sports Ltd.',cmplnk:'/FGL-Sports-jobs-in-Ontario',loc:'Ontario',country:'CA',zip:'',city:'',title:'Decision Support Analyst',locid:'8b17acc5f001bdbf',rd:'v7_ZQyGHijdq7ng-cswbFDpj7KoE_Ia4YknbAcijYgE'}; 
</script>

该数组包含一个未知的数量的元件。如何提取整个数组的内容并将其保存到json对象中？

来源

2017-02-14 user1155413

这是一个本发明的课题（https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object）不是数组。 – wpercy

如果您有动态内容，Beautilsoup和urlopen是解决问题的错误方法 –

@ cricket_007我认为这取决于..，有时javascript内容存在于HTML中（通常在脚本标记中），并且有意义的是转到“简单“的urlopen /请求方法，以避免基于浏览器或JavaScript引擎的方式的开销和缓慢。尽管如此，这里通常比较脆弱。这可能不是严格的“错误”，但更像是“谨慎使用和理解”:) – alecxe

BeautifulSoup只能帮助解决问题的一部分 - 找到包含所需对象的期望script元素。然后，你需要为使用JavaScript分析器，像slimit，或正则表达式，例如，沿着这些路线的东西：

import json 
import re 
from bs4 import BeautifulSoup 


data = """ 
<script type="text/javascript"> 
var jobmap = {}; 
jobmap[0]= {jk:'929a2508c8bf2c9c',efccid: '28d4bd688c1e4e86',srcid:'4beb17a7fc4b64e2',cmpid:'be1c2a3db344744f',num:'0',srcname:'City of Oshawa',cmp:'City of Oshawa',cmpesc:'City of Oshawa',cmplnk:'/City-of-Oshawa-jobs-in-Ontario',loc:'Oshawa, ON',country:'CA',zip:'',city:'Oshawa',title:'Systems Analyst',locid:'da5ca33120fa5fe5',rd:'8i0xAbEkuWUhy6dasPEQkceDzWLtCZmZLj2Y-bGYlQI'}; 
jobmap[1]= {jk:'2d06bbaac441e7d2',efccid: 'beb412fe8b0feacc',srcid:'0a0f0bf6b7639c78',cmpid:'0c05d4e9f9f0206d',num:'1',srcname:'FGL Sports Ltd.',cmp:'FGL Sports Ltd.',cmpesc:'FGL Sports Ltd.',cmplnk:'/FGL-Sports-jobs-in-Ontario',loc:'Ontario',country:'CA',zip:'',city:'',title:'Decision Support Analyst',locid:'8b17acc5f001bdbf',rd:'v7_ZQyGHijdq7ng-cswbFDpj7KoE_Ia4YknbAcijYgE'}; 
</script>""" 

soup = BeautifulSoup(data, "html.parser") 
script = soup.find("script", text=lambda text: "var jobmap" in text) 

pattern = re.compile(r"jobmap\[\d+\]\s*=\s*({.*?})") 
for item in pattern.findall(script.get_text(), re.MULTILINE): 
    print(item)

打印：

{jk:'929a2508c8bf2c9c',efccid: '28d4bd688c1e4e86',srcid:'4beb17a7fc4b64e2',cmpid:'be1c2a3db344744f',num:'0',srcname:'City of Oshawa',cmp:'City of Oshawa',cmpesc:'City of Oshawa',cmplnk:'/City-of-Oshawa-jobs-in-Ontario',loc:'Oshawa, ON',country:'CA',zip:'',city:'Oshawa',title:'Systems Analyst',locid:'da5ca33120fa5fe5',rd:'8i0xAbEkuWUhy6dasPEQkceDzWLtCZmZLj2Y-bGYlQI'} 
{jk:'2d06bbaac441e7d2',efccid: 'beb412fe8b0feacc',srcid:'0a0f0bf6b7639c78',cmpid:'0c05d4e9f9f0206d',num:'1',srcname:'FGL Sports Ltd.',cmp:'FGL Sports Ltd.',cmpesc:'FGL Sports Ltd.',cmplnk:'/FGL-Sports-jobs-in-Ontario',loc:'Ontario',country:'CA',zip:'',city:'',title:'Decision Support Analyst',locid:'8b17acc5f001bdbf',rd:'v7_ZQyGHijdq7ng-cswbFDpj7KoE_Ia4YknbAcijYgE'}

注意，每个item值是不可直接加载与json.loads()，请使用demjson.decode()或其他方式查看JavaScript对象字符串加载到P ython字典：

How to convert raw javascript object to python dictionary?

来源

2017-02-14 23:48:19 alecxe

从html中提取数组元素

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