Python爬虫实战(十)：爬取Linux公社资源站的所有电子资源

红太狼 2022-06-06 08:52 164阅读 0赞

#coding=utf-8
    import re
    import requests
    from tenacity import retry, stop_after_attempt
    
    @retry(stop=stop_after_attempt(3))
    def get_html(url):
        '''获取页面源代码'''
        headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0'}
        page = requests.get(url,headers = headers)
        html = page.text
        return html
    
    def get_real_url(url,reg):
        '''获取真实的页面地址'''
        mainurl = 'http://linux.linuxidc.com/'
        html = get_html(url)
        items = re.findall(reg,html)
        for item in items:
            realurl = '{}{}'.format(mainurl,item)
            yield realurl
    
    def get_year_url():
        '''获取**年的页面地址'''
        url = 'http://linux.linuxidc.com/index.php'
        reg = re.compile(r'href="(.*?)">\d+年资料')
        year_urls = get_real_url(url,reg)
        for year_url in year_urls:
            yield year_url
    
    def get_month_url():
        '''获取**月的页面地址'''
        reg = re.compile(r'href="(.*?)">\d+月')
        year_urls = get_year_url()
        for year_url in year_urls:
            month_urls =  get_real_url(year_url,reg)
            for month_url in month_urls:
                yield month_url
    
    def get_day_url():
        '''获取**日的页面地址'''
        reg = re.compile(r'href="(.*?)">\d+日')
        month_urls = get_month_url()
        for month_url in month_urls:
            day_urls =  get_real_url(month_url,reg)
            for day_url in day_urls:
                yield day_url
    
    def get_books_urls(urls):
        '''获取资料名称及下载页'''
        for url in urls:
            reg = re.compile(r'href="(index.*?)">(.*?)</a></div></td><td width="100">')
            html = get_html(url)
            items = re.findall(reg,html)
            for item in items:
                yield item
    
    def get_other_url(url):
        '''获取其他链接的资料'''
        reg = re.compile(r'href="(index.*?)">.*?</a></div></td><td width="100">')
        all_urls = get_real_url(url,reg)
        for all_url in all_urls:
            yield all_url
                
    def print_book_url(book,book_url):
        '''打印可下载的书籍及链接'''
        url = 'http://linux.linuxidc.com/'
        book = book.lower()
        item = book_url
        if len(item) == 2:
            bookname = item[1].lower()
            if book in bookname:
                print ('\n'+ item[1])
                print ("资料下载链接:")
                dlurl = '{}{}'.format(url,item[0])
                reg = re.compile(r'href="(linuxconf/download.php.*?)">.*?</a></div></td><td width="100">')
                download_urls = get_real_url(dlurl,reg)
                for download_url in download_urls:
                    print (download_url)
    
    def get_download_url(book):
        url_2011 = 'http://linux.linuxidc.com/index.php?folder=MjAxMcTq18rBzw=='
        all_urls = get_other_url(url_2011)
        books_urls = get_books_urls(all_urls)
        for book_url in books_urls:
            print_book_url (book,book_url)
        day_urls = get_day_url()
        books_urls = get_books_urls(day_urls)
        for book_url in books_urls:
            print_book_url (book,book_url)
    
    if __name__=='__main__':
        book = input ("请输入资料名称:")
        get_download_url(book)

说明：待添加。