python - 为什么这个网站不能用 bs4 抓取？

Question

我是一个学习网络爬虫的初学者，由于某种原因我无法爬网this地点。当我在 Chrome 中检查它时，代码看起来不错，但是当我用 BeautifulSoup 阅读它时，它不再是可刮的。汤提到“谷歌分析”，我真的不知道那是什么。

Answer 1

该站点的内容是通过 JavaScript 加载的，但您可以使用 requests模块来获取各个章节。章节的 URL 格式为 https://detroitbecometext.github.io/assets/html/chapterXY.html (example)。
例如这个脚本:

import re
import requests
from bs4 import BeautifulSoup


url = 'https://detroitbecometext.github.io/chapters'
asset_url = 'https://detroitbecometext.github.io/assets/html/'

soup = BeautifulSoup(requests.get(url).content, 'html.parser')
main_js = requests.get('https://detroitbecometext.github.io/' + soup.select_one('script[src^="main."]')['src']).text

for ch in re.findall(r'(chapter[\d.]+\.html?)', main_js):
    soup = BeautifulSoup(requests.get(asset_url + ch).content, 'html.parser')
    print(soup.get_text())
    print('-' * 80)

打印所有章节的所有文本:

...


Out of the elevator

SWAT: Negotiator on site. Repeat, negotiator on site.
Caroline Phillips: No, stop... I... I... I can't leave her. Oh, oh please, please, you gotta save my little girl... Wait... you're
        sending an android?
SWAT: Alright, ma'am. We need to go.
Caroline Phillips: You can't...you can't do that! You W- Why aren't you sending a real
        person? Don't let that thing near her! Keep that thing away from my daughter! KEEP IT AWAY!
    

...