多线程爬取学习通题库

今天在网上发现了一个学习通题库网站，正好最近也在研究怎么搭建题库，于是就写了一个多线程爬虫，爬取网站所有的题目。

下面是我写的代码

import requests
import re
from lxml import etree
import queue
import threading
import os


headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36',
}


# 保存位置
PATH = "G:\爬虫下载\学习通题库\期末考试题库\\"


# 队列
Q = queue.Queue()


# 往队列里放内容（采集函数）
def craw_list(i):
    url = 'http://www.cxeytk.com/ajax/ajaxLoadModuleDom_h.jsp'
    data = {
        'cmd': 'getWafNotCk_getAjaxPageModuleInfo',
        '_colId': '105',
        '_extId': '0',
        'moduleId': '328',
        'href': '/col.jsp?m328pageno={}&id=105'.format(i),
        'newNextPage': 'false',
        'needIncToVue': 'false',
    }
    r = requests.post(url=url, headers=headers, data=data)
    # 题库链接
    ret_list = re.findall(r"", r.text)

    for ret in ret_list:
        link = 'http://www.cxeytk.com/' + ret[0].replace(r'\"', '')
        title = ret[1].replace(r'\"', '')
        # print(link, title)
        Q.put([link, title])


# 从队列里取东西（下载函数）
def run():
    # 循环从队列中读取
    while True:
        if not t1.is_alive():
            # print("采集已完毕！！！")
            if Q.empty():
                break
        link = Q.get()[0]
        title = Q.get()[1]
        # 对链接发送get请求
        r = requests.get(url=link, headers=headers)
        tree = etree.HTML(r.text)
        # 获取所有文本
        try:
            text_list = tree.xpath('//div[@class="richContent  richContent3"]//text()')
        except:
            text_list = []
        # print(text_list)
        content = ''
        for text in text_list:
            content = content + text + '\n'
        if not os.path.exists(PATH):
            os.makedirs(PATH)
        with open(PATH + '{}.txt'.format(title), 'w', encoding='utf-8') as f:
            f.write(content)
        # 界面友好提示
        print('==={}===已下载'.format(title))


def main(start, end):
    for i in range(start, end):
        craw_list(i)


if __name__ == '__main__':
    # 开启多线程
    # 采集
    t1 = threading.Thread(target=main, args=(1, 37))
    # 下载
    t2 = threading.Thread(target=run)
    t3 = threading.Thread(target=run)
    t4 = threading.Thread(target=run)

    t1.start()
    t2.start()
    t3.start()
    t4.start()

然后附上爬取的结果图

好了，今天的分享就到这里了，希望对大家有所帮助！