Python-爬取妹子图(单线程和多线程版本)

一、参考文章

    Python爬虫之——爬取妹子图片

    上述文章中的代码讲述的非常清楚,我的基本能思路也是这样,本篇文章中的代码仅仅做了一些异常处理和一些日志显示优化工作,写此文章主要是当做笔记,方便以后查阅,修改的地方如下:

1、异常处理下面在代码中会单独标红

2、多线程版使用了multiprocessing这个库,需要在main函数开始调用freeze_support(),防止打包成exe之后,运行时创建线程失败

3、多线程版本加了一个命令行自定义线程个数功能

二、单线程版本

 1 #coding=utf-8
 2 import requests
 3 from bs4 import BeautifulSoup
 4 import os
 5 
 6 all_url = 'http://www.mzitu.com'
 7 
 8 
 9 #http请求头
10 Hostreferer = {
11     'User-Agent':'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)',
12     'Referer':'http://www.mzitu.com'
13                }
14 Picreferer = {
15     'User-Agent':'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)',
16     'Referer':'http://i.meizitu.net'
17 }
18 #此请求头破解盗链
19 
20 start_html = requests.get(all_url, headers = Hostreferer)
21 
22 #保存地址
23 path = os.getcwd() + '/mzitu/'
24 
25 #找寻最大页数
26 soup = BeautifulSoup(start_html.text, "html.parser")
27 page = soup.find_all('a', class_='page-numbers')
28 max_page = page[-2].text
29 
30 
31 same_url = 'http://www.mzitu.com/page/'
32 for n in range(0, int(max_page)+1):#遍历页面数
33     ul = same_url+str(n)
34     start_html = requests.get(ul, headers = Hostreferer)
35     soup = BeautifulSoup(start_html.text, "html.parser")
36     all_a = soup.find('div', class_ = 'postlist').find_all('a', target = '_blank')
37     for a in all_a:#每个页面包含的妹子数
38         title = a.get_text() #提取文本
39         if(title != ''):
40             print("准备扒取:" + title)
41 
42             #win不能创建带?的目录
43             if(os.path.exists(path+title.strip().replace('?', ''))):
44                     #print('目录已存在')
45                     flag = 1
46             else:
47                 os.makedirs(path+title.strip().replace('?', ''))
48                 flag = 0
49             os.chdir(path + title.strip().replace('?', ''))
50             href = a['href']
51             html = requests.get(href, headers = Hostreferer)
52             mess = BeautifulSoup(html.text, "html.parser")
53             pic_max = mess.find_all('span')
54             pic_max = pic_max[10].text #最大页数
55             if(flag == 1 and len(os.listdir(path+title.strip().replace('?', ''))) >= int(pic_max)):
56                 print('已经保存完毕,跳过')
57                 continue
58             for num in range(1, int(pic_max) + 1):#每个妹子的所有照片
59                 pic = href+'/'+str(num)
60                 html = requests.get(pic, headers = Hostreferer)
61                 mess = BeautifulSoup(html.text, "html.parser")
62                 pic_url = mess.find('img', alt = title)
63                
64                 if 'src' not in pic_url.attrs:#有些pic_url标签没有src这个属性,导致操作异常,在次进行过滤
65                     continue
66                 print(pic_url['src'])
67                 #exit(0)
68                 html = requests.get(pic_url['src'],headers = Picreferer)
69                 file_name = pic_url['src'].split(r'/')[-1]
70                 f = open(file_name, 'wb')
71                 f.write(html.content)
72                 f.close()
73             print('完成')
74     print('',n,'页完成')

三、多线程版本

 1 #coding=utf-8
 2 import requests
 3 from bs4 import BeautifulSoup
 4 import os
 5 from multiprocessing import Pool
 6 from multiprocessing import freeze_support
 7 import sys
 8 
 9 header = {
10     'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 UBrowser/6.1.2107.204 Safari/537.36',
11     'Referer':'http://www.mzitu.com'
12     }
13 Picreferer = {
14     'User-Agent':'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)',
15     'Referer':'http://i.meizitu.net'
16 }
17 
18 def find_MaxPage():
19     all_url = 'http://www.mzitu.com'
20     start_html = requests.get(all_url, headers = header)
21     #找寻最大妹子页面数
22     soup = BeautifulSoup(start_html.text, "html.parser")
23     page = soup.find_all('a', class_ = 'page-numbers')
24     max_page = page[-2].text
25     return max_page
26 
27 def Download(href, title, path):
28     html = requests.get(href, headers = header)
29     soup = BeautifulSoup(html.text, 'html.parser')
30     pic_max = soup.find_all('span')
31     pic_max = pic_max[10].text  # 最大页数
32     if(os.path.exists(path+title.strip().replace('?', '')) 
33     and len(os.listdir(path+title.strip().replace('?', ''))) >= int(pic_max)):
34         print('妹子已待命,继续准备下一个妹子' + title)
35         return 1
36     print(f"发现妹子资源{pic_max}个,准备中:" + title)
37     os.makedirs(path + title.strip().replace('?', ''))
38     os.chdir(path + title.strip().replace('?', ''))
39     for num in range(1, int(pic_max) + 1):
40         pic = href + '/' + str(num)
41         html = requests.get(pic, headers = header)
42         mess = BeautifulSoup(html.text, "html.parser")
43         pic_url = mess.find('img', alt = title)
44         if 'src' not in pic_url.attrs:#有些pic_url标签没有src属性,导致操作异常,在次进行过滤
45             continue
46         print(f"{title}:{pic_url['src']}")
47         html = requests.get(pic_url['src'], headers = header)
48         file_name = pic_url['src'].split(r'/')[-1]
49         f = open(file_name,'wb')
50         f.write(html.content)
51         f.close()
52     print('妹子已就绪,客官请慢用:' + title)
53 
54 if __name__ == '__main__':
55     freeze_support()#防止打包后 运行exe创建进程失败
56     
57     #线程池中线程数
58     count = 1
59     if len(sys.argv) >=2:
60         count = int(sys.argv[1])
61         
62     pool = Pool(count)
63     print(f'初始化下载线程个数${count}')
64 
65     # http请求头
66     path = os.getcwd() + '/mzitu_mutil/'
67     max_page = find_MaxPage() #获取最大页数  即生成的文件夹数量
68     print(f'捕获{max_page}页妹子,请耐心等待下载完成')
69     same_url = 'http://www.mzitu.com/page/'
70 
71     for n in range(1, int(max_page) + 1):
72         each_url = same_url + str(n)
73         start_html = requests.get(each_url, headers = header)#请求一页中的所有妹子
74         soup = BeautifulSoup(start_html.text, "html.parser")
75         all_a = soup.find('div', class_ = 'postlist').find_all('a', target = '_blank')
76         for a in all_a:#遍历每一页中的妹子
77             title = a.get_text()  # 提取文本
78             if (title != ''):
79                 href = a['href']#请求妹子的所有图集
80                 pool.apply_async(Download, args = (href, title, path))
81     pool.close()
82     pool.join()
83     print('所有妹子已就绪,客官请慢用')

四、资源下载

  资源下载地址:Python爬取妹子图-单线程和多线程版本

 

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posted @ 2018-11-25 20:14  朝十晚八  阅读(3113)  评论(0编辑  收藏  举报

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