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Python 需要使用BeautifulSoup/requests解析漫画图像的帮助吗

python web-scraping

Python 需要使用BeautifulSoup/requests解析漫画图像的帮助吗,python,web-scraping,beautifulsoup,request,urllib,Python,Web Scraping,Beautifulsoup,Request,Urllib,我是Python初学者，我已经学习了该程序的大部分基础知识。所以我决定创建我的第一个项目，以测试我的技能和理解能力。我的项目涉及从一个名为的网站解析某个漫画章节的图像。在查看html代码时，我注意到图像代码是隐藏的，并且以我以前从未见过的格式放置 </script> <script> var seriesId = 69462; var chapterId = 1204541; var images = {"1":"https://file-comic-99.anyacg

我是Python初学者，我已经学习了该程序的大部分基础知识。所以我决定创建我的第一个项目，以测试我的技能和理解能力。我的项目涉及从一个名为的网站解析某个漫画章节的图像。在查看html代码时，我注意到图像代码是隐藏的，并且以我以前从未见过的格式放置

</script>

<script>
var seriesId = 69462;
var chapterId = 1204541;
var images = 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var pages = 59;
var page = 0;
var prevCha = {"base":{"uniqueId":1200264,"parentId":0,"seriesId":69462,"createDate":"2018-04-10T06:08:16.041Z","publicDate":"2018-04-10T06:08:16.041Z","modifyDate":null,"updateDate":"2018-04-10T06:08:16.041Z","sortHash":"zzzzz.zzzzz.00090.00000"},"_extra":{"volcha":"Ch.90","updateDateAgo":"22 days ago","updateDateDif":22}};
var nextCha = null;
</script>
这应该会有所帮助

演示：

输出：

HTML元素用于嵌入或引用可执行代码；这通常用于嵌入或引用JavaScript代码

您所抓取的页面由JavaScript呈现，初始HTML包含一个带有图像的标记变量，该变量包含所有图片的URL。您可以使用提取包含URL的JavaScript对象的方法，也可以使用在引擎盖下使用Chromium来呈现浏览器中显示的网站

您可以使用以下代码获取所有URL：

from requests_html import HTMLSession

session = HTMLSession()
url = 'https://bato.to/chapter/1204541'
r = session.get(url)
r.html.render()

urls = [img.attrs['src'] for img in r.html.find('.item > img')]
此解决方案的问题是执行需要很长时间

为了澄清，.item>img以所有img元素为目标，这些元素是具有item类的元素的直接子元素。 您可以阅读更多有关CSS选择器的信息

您还可以使用：

哇！非常感谢你的帮助。你给了我一个关于正则表达式的巨大提示。我被告知永远不要在html页面上使用正则表达式。从不知道有异常。@BluHaz您应该尽可能避免使用正则表达式。它们可能会变得很长，过于复杂，难以理解和维护。好吧，明白了。除了请求_html之外，还有其他模块可以提供帮助吗？@Blu您也可以使用Selenium，我用一个解决方案更新了我的答案，但是，如果您只想获得URL，而不需要渲染整个页面来刮取任何其他数据，我认为这是一种过分的做法。非常感谢您分享您的答案。我从来不知道html模块的请求。看来我还有很长的路要走。我将使用Rakesh的答案，因为我熟悉正则表达式，但我一定要查看requests_html模块文档以了解更多信息。我尝试使用request_html方法，但我收到一个回溯错误，错误是：raise MAXRETISSUNABLE呈现页面。尝试增加超时请求。\u html.MaxRetries:无法呈现页面。试着增加timeout@Blu尝试设置超时关键字参数，例如：r.html.rendertimeout=20默认值为8秒。老实说，它需要很长的时间来呈现，它几乎取消了这个网站上的解决方案的资格。即使在我的浏览器中加载也需要16秒，所以在这种情况下，如果您不需要JS呈现的任何其他数据，您应该使用由提出的正则表达式解决方案。我将使用selenium方法。我现在有了学习如何使用它的理由。另外，我认为最好避免在html中使用正则表达式。 
from bs4 import BeautifulSoup
import requests
import json
import os
import re

# Download the page
url = 'https://bato.to/chapter/1204541.com'
source = requests.get(url).text
soup = BeautifulSoup(source, "html.parser")
scr = soup.find_all("script")
pattern = re.compile(r"var\s+images\s+=(.*)")     #Regex to get the script with var images

for i in scr:
    m = pattern.search(i.text)
    if m:
        print(json.loads(m.group(1).replace(";", "")))

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u'https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/411a7e9fce98275133915a1bfffa4a402dee7b8e_343839_800_1138.png', u'37': u'https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/f1c2fe8001425d88e9700633a7891f0901872f55_135829_800_1138.png', u'36': u'https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/87e86923d96455e89e8e3138b3ab5992df17cc79_541358_800_1138.png', u'35': u'https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/d7bfffc6e37d14f4cdd9a6f085355427cd86c3e9_414864_800_1138.png', u'34': u'https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/0a6c377f3960ef407ad9ea5c6f46409eb172327c_342094_800_1138.png', u'33': u'https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/d33951612052b7a452e6973b6a2cb5d74210fe05_447169_800_1138.png', u'55': u'https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/4642779f14b16771af87b63229f15bae9006f4a3_459041_800_1138.png', u'32': u'https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/674d038df3e5c9a472a11451ba262eaed67e7390_535795_800_1138.png', u'57': u'https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/459f0c4f5359ac0ee516c2175a25ca3c25276cbd_517997_800_1138.png', u'50': u'https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/aa41d6836befb0ae8755c767a892cbfc065223f7_1307106_1600_1138.png'}

from requests_html import HTMLSession

session = HTMLSession()
url = 'https://bato.to/chapter/1204541'
r = session.get(url)
r.html.render()

urls = [img.attrs['src'] for img in r.html.find('.item > img')]

>>> urls
['https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/57a04a3ce55bd48debf0a486a4c1a48f6380ef9b_1066291_800_1138.png',
 'https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/a0f75d10919430e6ef25a86c3dcc65f343d8e319_518773_800_1138.png',
 'https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/575d00ff9ef6873ee9ecfb418e360fe72cc1c594_418309_800_1138.png',
 ...
]

>>> len(urls)
59

from selenium import webdriver

browser = webdriver.Chrome()
browser.get(url)
url_dict = browser.execute_script('return images;')
browser.quit()

>>> url_dict['1']
'https://file-comic-99.anyacg.co/uploads/5ae318893532c3405bd86baa/57a04a3ce55bd48debf0a486a4c1a48f6380ef9b_1066291_800_1138.png'