使用python和请求抓取AJAX网页 [英] Scraping an AJAX web page using python and requests

问题描述

我试图使用以下方法刮过此页面beautifulsoup find方法，但是我无法在HTML页面中找到表值.我发现，当我通过内部API加载页面时，网站会立即生成数据.有帮助吗?

I tried to scrape this page using beautifulsoup find method but I could not find the table value in the HTML page. I found out that the website is generating the data instantly when I load the page through an internal API. Any help??

提前谢谢.

推荐答案

这对我有用.我不得不在开发工具中进行挖掘，但是找到了

This works for me. I had to dig around in the dev tools but found it

import requests

geturl=r'https://www.barchart.com/futures/quotes/CLJ19/all-futures'
apiurl=r'https://www.barchart.com/proxies/core-api/v1/quotes/get'


getheaders={

    'accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
    'accept-encoding': 'gzip, deflate, br',
    'accept-language': 'en-US,en;q=0.9',
    'cache-control': 'max-age=0',
    'upgrade-insecure-requests': '1',
    'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.119 Safari/537.36'
    }

getpay={
    'page': 'all'
}

s=requests.Session()
r=s.get(geturl,params=getpay, headers=getheaders)



headers={
    'accept': 'application/json',
    'accept-encoding': 'gzip, deflate, br',
    'accept-language': 'en-US,en;q=0.9',
    'referer': 'https://www.barchart.com/futures/quotes/CLJ19/all-futures?page=all',
    'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.119 Safari/537.36',
    'x-xsrf-token': s.cookies.get_dict()['XSRF-TOKEN']

}


payload={
    'fields': 'symbol,contractSymbol,lastPrice,priceChange,openPrice,highPrice,lowPrice,previousPrice,volume,openInterest,tradeTime,symbolCode,symbolType,hasOptions',
    'list': 'futures.contractInRoot',
    'root': 'CL',
    'meta': 'field.shortName,field.type,field.description',
    'hasOptions': 'true',
    'raw': '1'

}


r=s.get(apiurl,params=payload,headers=headers)
j=r.json()
print(j)

>{'count': 108, 'total': 108, 'data': [{'symbol': 'CLY00', 'contractSymbol': 'CLY00 (Cash)', ........

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