Question

我一直在使用以下代码来解析链接https://www.blogforacure.com/members.php中的网页。代码应该返回给定页面的所有成员的链接。

    from bs4 import BeautifulSoup
    import urllib
    r = urllib.urlopen('https://www.blogforacure.com/members.php').read()
    soup = BeautifulSoup(r,'lxml')
    headers = soup.find_all('h3')
    print(len(headers))
    for header in headers:
       a = header.find('a')
       print(a.attrs['href'])

但我只从上一页获得前10个链接。即使在打印美化选项时，我也只看到前10个链接。

Answer 1

通过向https://www.blogforacure.com/site/ajax/scrollergetentries.php端点发出AJAX请求来动态加载结果。

使用requests维护网络抓取会话在代码中模拟它们：

from bs4 import BeautifulSoup
import requests

url = "https://www.blogforacure.com/site/ajax/scrollergetentries.php"
with requests.Session() as session:
    session.headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36'}
    session.get("https://www.blogforacure.com/members.php")

    page = 0
    members = []
    while True:
        # get page
        response = session.post(url, data={
            "p": str(page),
            "id": "#scrollbox1"
        })
        html = response.json()['html']

        # parse html
        soup = BeautifulSoup(html, "html.parser")
        page_members = [member.get_text() for member in soup.select(".memberentry h3 a")]
        print(page, page_members)
        members.extend(page_members)

        page += 1

它将当前页码和每页累积成员名称的成员列表打印到members列表中。不发布它打印的内容，因为它包含名称。

请注意，我故意让循环无休止，请弄清楚退出条件。可能是response.json()抛出错误。

如何用漂亮的汤解析长网页？

1 个答案: