Question

我正在使用urlopen和beautifulsoup4来获取网页的内容。我正在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。

数组采用以下格式：

<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>

数组包含未知数量的元素。如何提取整个数组的内容并将其保存到json对象中？

Answer 1

BeautifulSoup可以帮助解决问题的一部分 - 找到包含所需对象的所需script元素。然后，您需要使用 javascript解析器，例如slimit或正则表达式，例如，这些内容：

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'}

请注意，每个item值无法直接加载 json.loads()，请使用demjson.decode()或其他方式将javascript对象字符串加载到Python中字典：

How to convert raw javascript object to python dictionary?

从html中提取数组元素

1 个答案: