Question

我正在尝试编写一个脚本，该脚本仅对图像和图像刮掉9gag。但是我遇到了一个问题，就是我的请求或Beautifulsoup收到了错误的HTML页面。 Beautifulsoup当前正在获取源页面，而不是包含图像的页面。
为什么Beautifulsoup排除包含实际图像的类？还是不同的HTML页面？

我曾尝试使用“美丽的汤”解析器的不同格式，但仍然得到错误的页面。

如果转到9gag并单击鼠标右键，然后单击“检查”，则可以转到图像，然后单击该页面以使用脚本提取图像。

我的脚本：

import requests
from bs4 import BeautifulSoup
import os


def download_image(url, fileName):          #save image function
    path = os.path.join("imgs", fileName)
    f = open(path, 'wb')
    f.write(requests.get(url).content)
    f.close()


def fetch_url(url):                        # fetching url
    page = requests.get(url)
    return page

def parse_html(htmlPage):                  #parsing the url
    soup = BeautifulSoup(htmlPage, "html.parser")
    return soup


def retrieve_jpg_urls(soup):

    list_of_urls = soup.find_all('list')       #classes wanted
    parsed_urls = []
    for index in range(len(list_of_urls)):
        try:
            parsed_urls.append(soup.find_all('img')[index].attrs['src']) #img wanted inside class
        except:
            next
    return parsed_urls


def main():
    htmlPage = fetch_url("https://9gag.com/")
    soup = parse_html(htmlPage.content)
    jpgUrls = retrieve_jpg_urls(soup)
    for index in range(len(jpgUrls)):
        try:
            download_image(jpgUrls[index], "savedpic{}.jpg".format(index))
        except:
            print("failed to parse image with url {}".format(jpgUrls[index]))
    print("")

if __name__ == "__main__":
    main()

Beautifulsoup得到了什么：

<!DOCTYPE html>

<html lang="en">
<head>
<title>9GAG: Go Fun The World</title>
<link href="https://assets-9gag-fun.9cache.com" rel="preconnect"/>
<link href="https://img-9gag-fun.9cache.com" rel="preconnect"/>
<link href="https://miscmedia-9gag-fun.9cache.com" rel="preconnect"/>
<link href="https://images-cdn.9gag.com/img/9gag-og.png" rel="image_src"/>
<link href="https://9gag.com/" rel="canonical"/>
<link href="android-app://com.ninegag.android.app/http/9gag.com/" rel="alternate"/>
<link href="https://assets-9gag-fun.9cache.com/s/fab0aa49/5aa8c9f45ee3dd77f0fdbe4812f1afcf5913a34e/static/dist/core/img/favicon.ico" rel="shortcut icon"/>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type"/>
<meta content="9GAG has the best funny pics, gifs, videos, gaming, anime, manga, movie, tv, cosplay, sport, food, memes, cute, fail, wtf photos on the internet!" name="description"/>

我想要以下内容：

<img src="https://img-9gag-fun.9cache.com/photo/aLgyG2V_460s.jpg" alt="There&amp;#039;s genuine friend love there" style="min-height: 566.304px;">

Answer 1

尝试在页面上提取JSON：

import re
import json

# ...
res = requests.get(...)
html = res.content

m = re.search('JSON\.parse\((.*)\);</script>', html)
double_encoded = m.group(1)
encoded = json.loads(double_encoded)
parsed = json.loads(encoded)

images = [p['images']['image700']['url'] for p in parsed['data']['posts']]
print(images)

输出：

['https://img-9gag-fun.9cache.com/photo/abY9Wg8_460s.jpg', 'https://img-9gag-fun.9cache.com/photo/aLgy4o5_460s.jpg', 'https://img-9gag-fun.9cache.com/photo/aE2LVeM_460s.jpg', 'https://img-9gag-fun.9cache.com/photo/amBEGb4_700b.jpg', 'https://img-9gag-fun.9cache.com/photo/aKxrv56_460s.jpg', 'https://img-9gag-fun.9cache.com/photo/a5M8wXN_460s.jpg', 'https://img-9gag-fun.9cache.com/photo/aNY6QEv_700b.jpg', 'https://img-9gag-fun.9cache.com/photo/aYY2Deq_700b.jpg', 'https://img-9gag-fun.9cache.com/photo/aQR0AEw_460s.jpg', 'https://img-9gag-fun.9cache.com/photo/aLgy19P_700b.jpg']

从9gag抓取图像，无法读取正确的HTML页面

1 个答案: