python爬蟲批量抓取ip代理

使用爬蟲抓取數據時，經常要用到多個ip代理，防止單個ip訪問太過頻繁被封禁。
ip代理可以從這個網站獲取：http://www.xicidaili.com/nn/。
因此寫一個python程式來獲取ip代理，保存到本地。
python版本：3.6.3

 1 #grab ip proxies from xicidaili
 2 import sys, time, re, requests
 3 from multiprocessing.dummy import Pool as ThreadPool
 4 from lxml import etree
 5 
 6 IP_POOL = 'ip_pool.py'
 7 URL = 'http://www.xicidaili.com/nn/' #IP代理 高匿
 8 #URL = 'http://www.xicidaili.com/wt/' #IP代理 http
 9 RUN_TIME = time.strftime("%Y-%m-%d %H:%M", time.localtime()) #執行時間
10 
11 #用字典存放有效ip代理
12 alive_ip = {'http': [], 'https': []}
13 #多線程
14 pool = ThreadPool(20)
15 
16 #返回html文本
17 def get_html(url):
18     headers = {
19         "User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:55.0) Gecko/20100101 Firefox/55.0",
20         "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
21         "Accept-Language": "zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3",
22         "Accept-Encoding": "gzip, deflate",
23         "Referer": "https://www.xicidaili.com/",
24         "Connection": "keep-alive",
25         "Upgrade-Insecure-Requests": "1"
26     }
27     r = requests.get(url, headers=headers)
28     r.encoding = 'utf-8'
29     return r.text
30 
31 #測試ip代理是否存活
32 def test_alive(proxy):
33     global alive_ip
34     proxies = {'http': proxy}
35     try:
36         r = requests.get('https://www.baidu.com', proxies=proxies, timeout=3)
37         if r.status_code == 200:
38             if proxy.startswith('https'):
39                 alive_ip['https'].append(proxy)
40             else:
41                 alive_ip['http'].append(proxy)
42     except:
43         print("%s無效!"%proxy)
44 
45 #解析html文本，獲取ip代理
46 def get_alive_ip_address():
47     iplist = []
48     html = get_html(URL)
49     selector = etree.HTML(html)
50     table = selector.xpath('//table[@id="ip_list"]')[0]
51     lines = table.xpath('./tr')[1:]
52     for line in lines:
53         speed, connect_time = line.xpath('.//div/@title')
54         data = line.xpath('./td')
55         ip = data[1].xpath('./text()')[0]
56         port = data[2].xpath('./text()')[0]
57         anonymous = data[4].xpath('./text()')[0]
58         ip_type = data[5].xpath('./text()')[0]
59         #過濾掉速度慢和非高匿的ip代理
60         if float(speed[:-1])>1 or float(connect_time[:-1])>1 or anonymous != '高匿':
61             continue
62         iplist.append(ip_type.lower() + '://' + ip + ':' + port)
63     pool.map(test_alive, iplist)
64 
65 #把抓取到的有效ip代理寫入到本地
66 def write_txt(output_file):
67     with open(output_file, 'w') as f:
68         f.write('#create time: %s\n\n' % RUN_TIME)
69         f.write('http_ip_pool = \\\n')
70         f.write(str(alive_ip['http']).replace(',', ',\n'))
71         f.write('\n\n')
72     with open(output_file, 'a') as f:
73         f.write('https_ip_pool = \\\n')
74         f.write(str(alive_ip['https']).replace(',', ',\n'))
75     print('write successful: %s' % output_file)
76 
77 def main():
78     get_alive_ip_address()
79     write_txt(output_file)
80 
81 if __name__ == '__main__':
82     try:
83         output_file = sys.argv[1] #第一個參數作為文件名
84     except:
85         output_file = IP_POOL
86     main()

運行程式：

root@c:test$ python get_ip_proxies.py
write successful: ip_pool.py

查看文件：

root@c:test$ vim ip_pool.py

 1 #create time: 2019-03-14 19:53
 2 
 3 http_ip_pool = \
 4 ['http://183.148.152.1:9999',
 5  'http://112.85.165.234:9999',
 6  'http://112.87.69.162:9999',
 7  'http://111.77.197.10:9999',
 8  'http://113.64.94.80:8118',
 9  'http://61.184.109.33:61320',
10  'http://125.126.204.82:9999',
11  'http://125.126.218.8:9999',
12  'http://36.26.224.56:9999',
13  'http://123.162.168.192:40274',
14  'http://116.209.54.125:9999',
15  'http://183.148.148.211:9999',
16  'http://111.177.161.111:9999',
17  'http://116.209.58.245:9999',
18  'http://183.148.143.38:9999',
19  'http://116.209.55.218:9999',
20  'http://114.239.250.15:9999',
21  'http://116.209.54.109:9999',
22  'http://125.123.143.98:9999',
23  'http://183.6.130.6:8118',
24  'http://183.148.143.166:9999',
25  'http://125.126.203.228:9999',
26  'http://111.79.198.74:9999',
27  'http://116.209.53.215:9999',
28  'http://112.87.69.124:9999',
29  'http://112.80.198.13:8123',
30  'http://182.88.160.16:8123',
31  'http://116.209.56.24:9999',
32  'http://112.85.131.25:9999',
33  'http://116.209.52.234:9999',
34  'http://175.165.128.223:1133',
35  'http://122.4.47.199:8010',
36  'http://112.85.170.204:9999',
37  'http://49.86.178.206:9999',
38  'http://125.126.215.187:9999']
39 
40 https_ip_pool = \
41 ['https://183.148.156.98:9999',
42  'https://111.79.199.167:808',
43  'https://61.142.72.150:39894',
44  'https://119.254.94.71:42788',
45  'https://221.218.102.146:33323',
46  'https://122.193.246.29:9999',
47  'https://183.148.139.173:9999',
48  'https://60.184.194.157:3128',
49  'https://118.89.138.129:52699',
50  'https://112.87.71.67:9999',
51  'https://58.56.108.226:43296',
52  'https://182.207.232.135:50465',
53  'https://111.177.186.32:9999',
54  'https://58.210.133.98:32741',
55  'https://115.221.116.71:9999',
56  'https://183.148.140.191:9999',
57  'https://183.148.130.143:9999',
58  'https://116.209.54.84:9999',
59  'https://125.126.219.125:9999',
60  'https://112.85.167.158:9999',
61  'https://112.85.173.76:9999',
62  'https://60.173.244.133:41306',
63  'https://183.148.147.223:9999',
64  'https://116.209.53.68:9999',
65  'https://111.79.198.102:9999',
66  'https://123.188.5.11:1133',
67  'https://60.190.66.131:56882',
68  'https://112.85.168.140:9999',
69  'https://110.250.65.108:8118',
70  'https://221.208.39.160:8118',
71  'https://116.209.53.77:9999',
72  'https://116.209.58.29:9999',
73  'https://183.148.141.129:9999',
74  'https://124.89.33.59:53281',
75  'https://116.209.57.149:9999',
76  'https://58.62.238.150:32431',
77  'https://218.76.253.201:61408']

之後就可以直接使用了

from ip_pool import http_ip_pool, https_ip_pool