关于python:python-爬取网站的博客目录

第一步，装置 requests-html

• 降级 pip

pip install --upgrade pip

• 降级 urllib3

sudo python3 -m pip install   urllib3   --upgrade

• 装置 requests-html

 sudo python3 -m pip install requests-html

第 1.1 步，给我的项目，装置 requests-html

• 批改 setup.py 文件,

增加

install_requires=[
          'requests-html',
      ],

• 批改 launch.json

增加

 "pythonPath": "/usr/bin/python3"

• 命令行，装置

sudo python3 -m   setup install

• python 文件中，应用

from requests_html import HTMLSession

第 2 步，持续应用 youtube – dl

• 新建一个信息提取类

 class XxxIE(InfoExtractor):

• 建设匹配正则

_VALID_URL = r'https?://(?:www\.|m\.)?xxx\.com.+posts?.+'

对应源代码

启动后，

• 先走 YoutubeDL.py 文件的

 def extract_info(self, url, download=True, ie_key=None, extra_info={},
                     process=True, force_generic_extractor=False):
     # ...
     for ie in ies:   
         if not ie.suitable(url):
              continue
     # ...

• 再走 extractor 文件夹下 common.py 文件的

@classmethod
def suitable(cls, url):
     if '_VALID_URL_RE' not in cls.__dict__:
            cls._VALID_URL_RE = re.compile(cls._VALID_URL)
     # ...

2.1 剩下的交给

class XxxIE(InfoExtractor):

• 先在 extractor 文件夹下的

extractors.py

中援用一下

• XxxIE 中下载爬取，即可

from requests_html import HTML

class XxxIE(InfoExtractor):
    _GEO_COUNTRIES = ['CN']
    IE_NAME = 'xxx: blog'
    IE_DESC = 'wo qu'
    _VALID_URL = r'https?://(?:www\.|m\.)?xxx\.com.+posts?.+'
    _TEMPLATE_URL = '%s://www.xxx.com/%s/posts/%s/'
    _LIST_VIDEO_RE = r'<a[^>]+?href="(?P<url>/%s/sound/(?P<id>\d+)/?)"[^>]+?title="(?P<title>[^>]+)">'

    def _real_extract(self, url):
        scheme = 'https' if url.startswith('https') else 'http'


        print("start ya yay  ya")
        
        print("\n\n\n")
        self.downloadX(url, 1)
        small = list(range(2, 20))

        for index in small:
            # ?page=2
            src = url + "?page=" + str(index)
            self.downloadX(src, index)

        print("\n\n\n")
        return {}



    def downloadX(self, src, index):
        audio_id = 123456
        webpage = self._download_webpage(src, audio_id,
                                         note='Download sound page for %s' % audio_id,
                                         errnote='Unable to get sound page')

        html = HTML(html=webpage)
        # print(webpage)
        jsonElement = html.find('#js-initialData') 
        jsonInfo = jsonElement[0].text

        jsonX = json.loads(jsonInfo)
        dic = jsonX['initialState']['entities']['articles']
        print("page:    " + str(index) + "  :  ")
        for k, v in dic.items():
            # pprint(v)
            t = v.get('title')
            print(t)
        print("\n")

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