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使用Python爬取代理ip
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本文主要代码用于有代理网站http://www.kuaidaili.com/free/intr中的代理ip爬取，爬虫使用过程中需要输入含有代理ip的网页链接。
测试ip是否可以用
import telnetlib
import requests
from bs4 import BeautifulSoup, element
import json
def filter_ip(ip_info):
'''
判断给定代理ip是否可用
:param ip_info:
:return:
'''
ip, port = ip_info.split(':')
try:
telnetlib.Telnet(ip, port=int(port), timeout=5)
except:
return False
else:
return True
获取指定页面的代理ip地址
def get_ip(url):
'''
爬取url中的全部代理ip
:param url: 存在代理ip的网页
:return:
'''
headers = {
'Host': 'www.kuaidaili.com',
'User-Agent': 'Mozilla/5.0 (iPad; CPU OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
'Accept-Language': 'en-US,en;q=0.8,zh-CN;q=0.6,zh;q=0.4',
'Accept-Encoding': 'gzip, deflate',
'Referer': 'http://www.youdaili.net/',
'Cookie': 'yd_cookie=f79e58ee-56a0-420270b11723b478602ef5c39e38dfb62a0f; _ydclearance=7c74cfd9ee4bc1537da1e0c6-b5de-458f-bc6c-6c973e273296-1505809848; channelid=0; sid=1505801661396785; _ga=GA1.2.1178656966.1505802632; _gid=GA1.2.1266088947.1505802632; Hm_lvt_7ed65b1cc4b810e9fd37959c9bb51b31=1505802632; Hm_lpvt_7ed65b1cc4b810e9fd37959c9bb51b31=1505802650',
'Connection': 'keep-alive',
} wb_data = requests.get(url, headers=headers)
soup = BeautifulSoup(wb_data.text, 'html5lib')
ip_text = soup.select('#list > table > tbody > tr > td:nth-of-type(1)')
port_text = soup.select('#list > table > tbody > tr > td:nth-of-type(2)')
ip = [e.text for e in ip_text if len(e.text) >6]
port = [e.text for e in port_text if len(e.text) > 0] ip_port =['{0}:{1}'.format(a, b) for a, b in zip(ip, port)]
ip_good = [e for e in ip_port if filter_ip(e)]
return ip_good
调用爬虫
if __name__ == '__main__':
# 包含ip的网页链接
urls = ['http://www.kuaidaili.com/free/intr/{0}/'.format(i) for i in range(1, 21)] ip_good = list()
for url in urls:
tmp = get_ip(url)
ip_good.extend(tmp)
print url
print ip_good
with open('./ip.txt', 'w') as f:
f.write(json.dumps(ip_good))
f.close()
