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python爬虫批量抓取ip代理(一)
2019-03-14 22:14:43 】 浏览:78
Tags:python 爬虫 批量 代理

使用爬虫抓取数据时,经常要用到多个ip代理,防止单个ip访问太过频繁被封禁。
ip代理可以从这个网站获取:http://www.xicidaili.com/nn/。
因此写一个python程序来获取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()) #执行时间
10 

 
			
color: #008080;">11
#用字典存放有效ip代理 12 alive_ip = {'http': [], 'https': []} 13 #多线程 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 #测试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无效!"%proxy) 44 45 #解析html文本,获取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 #过滤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代理写入到本地 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] #第一个参数作为文件名 84 except: 85 output_file = IP_POOL 86 main()

运行程序:

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://112.8
			
		  
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