利用BeautifulSoup批量爬取筆趣閣小說。

from bs4 import BeautifulSoup
import urllib.request
import re
import os
import threading
import time
# 通過爬蟲爬取一本小說

base_url = 'http://www.qu.la' # 筆趣閣首頁網址

class myThread (threading.Thread):   #繼承父類threading.Thread
    def __init__(self, threadID, counter,start_page):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.counter = counter
        self.start_page=start_page
        self.bookname, self.url, self.first_url = get_book_by_id(self.counter,self.start_page)
    def run(self):                   #把要執行的程式碼寫到run函式裡面 執行緒在建立後會直接執行run函式
        get_chapter_content(self.bookname, self.url, self.first_url)

def get_book_by_id(counter, start_page):
    url = base_url + '/book/' + str(counter + start_page) + '/'
    html_res = urllib.request.urlopen(url)
    soup = BeautifulSoup(html_res, 'html.parser')
    info = soup.select('#wrapper .box_con #maininfo #info')[0]
    bookname = info.contents[1].string
    writer = info.find('p').string
    latest = info.find_all('p')[2].string # 最後更新
    newest = info.find_all('p')[3] # 最新章節
    intro = soup.select('#wrapper .box_con #maininfo #intro')[0].text
    introduction = u"{0}\n{1}\n{2}\n{3}\n{4}\n".format(bookname, writer, latest, newest, intro, intro)
    fw = open("{}.txt.download".format(bookname), 'w', encoding='utf-8')
    fw.write(introduction)
    # 找到第一章的href開始下載
    contents = soup.select('#wrapper .box_con #list dl dt')
    #first_url.find_all('dt')
    for content in contents:
        if str(content).__contains__('一') or str(content).__contains__('正文'):
            start = content
    first_href = start.findNextSibling('dd').contents[1]['href']
    first_url = base_url + first_href
    return bookname, url, first_url


def get_chapter_content(bookname, url, chapter_url):
    fa = open("{0}.txt.download".format(bookname), 'a', encoding='utf-8')
    while(True):
        try:
            html_ret = urllib.request.urlopen(chapter_url, timeout=15).read()
        except:
            continue
        soup = BeautifulSoup(html_ret, 'html.parser')
        chapter = soup.select('#wrapper .content_read .box_con .bookname')[0]
        chapter_url = chapter.findAll('a')[2]['href']
        chapter_name = chapter.h1.string
        chapter_content = soup.select('#wrapper .content_read .box_con #content')[0].text
        chapter_content = re.sub('\s+', '\r\n\t', chapter_content).strip('\r\n')
        fa.write(chapter_name)
        fa.write(chapter_content)
        if chapter_url == "./":
            break
        chapter_url = url + chapter_url
    os.rename('{}.txt.download'.format(bookname), '{}.txt'.format(bookname))
    print("{}.txt下載完成".format(bookname))


#批量獲取txt  900-1000
def get_txts(start_page):
    threads = []
    print("當前起始頁面：" + str(start_page))
    print("===============建立下載任務====================")
    for i in range(start_page, start_page+10):
        thread_one = myThread(i, i, start_page)
        thread_one.start()
        threads.append(thread_one)
    print("================下載任務建立完成================")
    print("================等待下載任務完成================")
    task_num = len(threads)
    count = 0
    while (1):
        os.system('clear')
        print('============{0:0>8}-{1:0>8} '.format(start_page, start_page + 10) + "下載中===========")
        run_task = 0
        for thread in threads:
            if (thread.isAlive()):
                run_task += 1
                print('{}下載中'.format(thread.bookname))
            else:
                print('{}下載完成'.format(thread.bookname))
        print('\b'+"總任務數：" + str(task_num) + "  已完成任務數：" + str(task_num - run_task)+"\r")
        if (run_task == 0):
            break
        time.sleep(1)
        if (count > 100000):
            count = 0
        else:
            count += 1
    os.system('clear')
    print("所有下載任務已完成")
    time.sleep(2)

if __name__ == "__main__":
    get_txts(20)
 

執行結果圖：