Python crawls available proxy IPs

Preface

Take a recently discovered free proxy IP website as an example: http://www.xicidaili.com/nn/. When using it, I found that many IPs cannot be used.

So I wrote a script in Python, which can detect the available proxy IPs.

The script is as follows:

#encoding=utf8
import urllib2
from bs4 import BeautifulSoup
import urllib
import socket
 
User_Agent = 'Mozilla/5.0 (Windows NT 6.3; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0'
header = {}
header['User-Agent'] = User_Agent
 
'''
获取所有代理IP地址
'''
def getProxyIp():
 proxy = []
 for i in range(1,2):
  try:
   url = 'http://www.xicidaili.com/nn/'+str(i)
   req = urllib2.Request(url,headers=header)
   res = urllib2.urlopen(req).read()
   soup = BeautifulSoup(res)
   ips = soup.findAll('tr')
   for x in range(1,len(ips)):
    ip = ips[x]
    tds = ip.findAll("td")
    ip_temp = tds[1].contents[0]+"\t"+tds[2].contents[0]
    proxy.append(ip_temp)
  except:
   continue
 return proxy
  
'''
验证获得的代理IP地址是否可用
'''
def validateIp(proxy):
 url = "http://ip.chinaz.com/getip.aspx"
 f = open("E:\ip.txt","w")
 socket.setdefaulttimeout(3)
 for i in range(0,len(proxy)):
  try:
   ip = proxy[i].strip().split("\t")
   proxy_host = "http://"+ip[0]+":"+ip[1]
   proxy_temp = {"http":proxy_host}
   res = urllib.urlopen(url,proxies=proxy_temp).read()
   f.write(proxy[i]+'\n')
   print proxy[i]
  except Exception,e:
   continue
 f.close()
 
    
if __name__ == '__main__':
 proxy = getProxyIp()
 validateIp(proxy)

After running successfully, open the file under E drive, you can see the following available Proxy IP address and port:

Summary

This is just the first page crawled IP address, if necessary, you can crawl a few more pages. At the same time, the website is updated from time to time, so it is recommended to only crawl the first few pages when crawling. The above is the entire content of this article. I hope it will be helpful to everyone learning to use Python.

For more articles related to proxy IPs available for Python crawling, please pay attention to the PHP Chinese website!