爬取先知论坛的文章(含图片)

为了一些线下ctf比赛无法联网的情况，特准备了此脚本爬取先知论坛的文章(含图片)。

 

　　新建xianzhi文件夹，包含如下2个子目录（picture、t）和1个txt文档（exist_tid.txt）：

-rw-r--r--@ 1 shellyzhang staff 0 Sep 11 16:30 exist_tid.txt
drwxr-xr-x 3 shellyzhang staff 96 Sep 11 16:30 picture
drwxr-xr-x 3 shellyzhang staff 96 Sep 11 16:30 t
-rw-r--r-- 1 shellyzhang staff 1993 Sep 15 15:30 xianzhi_sprider.py

　　再在此文件夹下新建脚本xianzhi_sprider.py，内容为：

 1 import requests
 2 import re
 3 
 4 #把图片的源地址指向本地
 5 def format_pic_url(old_url):
 6     old_host = 'https://xzfile.aliyuncs.com/media/upload/picture'
 7     new_host = '../picture'
 8     return old_url.replace(old_host,new_host)
 9 
10 #通过文章编号，获取文章内容
11 def getXianZhiHTML(tid):
12     url = 'https://xz.aliyun.com/t/{}'.format(tid)
13     resp = requests.get(url)
14     # print(resp.status_code)
15     if resp.status_code != 200:
16         return None
17     else:
18         return resp.text
19 
20 #获取图片地址
21 def getImgUlr(resp_text):
22     re_rule = re.compile(r'<img src="https://xzfile.aliyuncs.com.*?">')
23     result = []
24     for i in re_rule.findall(resp_text):
25         result.append(i.replace('<img src="','').replace('">',''))
26     return result
27 
28 #下载图片
29 def download_img(img_url):
30     response = requests.get(img_url)
31     img = response.content
32     local_img = format_pic_url(img_url).replace('..','.')
33     try:
34         with open(local_img, 'wb') as f:
35             f.write(img)
36     except Exception as e:
37         print(e)
38         pass
39 
40 #读文件
41 def readFile(target_file):
42     with open(target_file, 'r',encoding='utf-8') as f:
43         return f.readlines()
44 
45 #写文件
46 def writeFile(target_file,STR):
47     with open(target_file, 'a',encoding='utf-8') as f:
48         f.write(STR)
49 
50 #主函数
51 def main(tid):
52     exist_tid = './exist_tid.txt'
53     if str(tid)+'\n' not in readFile(exist_tid): #之前没有此tid，才进行后续
54         resp_text = getXianZhiHTML(tid)
55         if resp_text == None:
56             pass
57         else:
58             # 下载所有图片
59             for img_url in getImgUlr(resp_text):
60                 download_img(img_url)
61             #保存文章
62             t_path = './t/{}.html'.format(tid)
63             resp_text = format_pic_url(resp_text)
64             writeFile(t_path,resp_text)
65             writeFile(exist_tid, str(tid) + '\n')
66     else:
67         print('{} is exist!'.format(tid))
68 
69 if __name__ == '__main__':
70     for tid in range(0,10000):
71         main(tid)

 

posted @ 2020-10-19 09:50  hanbufei  阅读(544)  评论(0)  编辑  收藏  举报