Python采集代理ip并判断是否可用和定时更新的方法
网上有很多免费的ip地址,都是可以使用的,但是如果手动来获取太麻烦,这里通过Python自动抓取,可以批量获取。
代码如下:
# -*- coding: utf-8 -*- import re import urllib2 import json import os import time import socket class ProxyIp(object): def __init__(self): self.path = os.path.split(os.path.realpath(__file__))[0] # Get latest proxy ip and download to json def update_ip(self): print 'Update Ip' url = 'http://www.ip3366.net/free/' req = urllib2.Request(url) response = urllib2.urlopen(req) matches = re.findall( ur'(\d+.\d+.\d+.\d+)</td>\s+<td>(\d+)</td>\s+<td>.*?</td>\s+<td>(HTTPS?)</td>', response.read(), re.I ) ls = [] for match in matches: if self.is_open(match[0], match[1]): ls.append({'ip':match[0], 'port':match[1], 'protocol': match[2]}) with open('%s/ip.json' % self.path, 'w') as f: json.dump(ls, f) return ls # whether the ips is last or old. def is_last(self): m_time = int(os.path.getmtime('%s/ip.json' % self.path)) now_time = int(time.time()) return (now_time - m_time) > 60*60*4 # 4 hours @staticmethod def is_open(ip, port): s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) try: s.connect(ip, int(port)) return True except: print 'Faild IP: %s:%s' % (ip, port) return False def get_proxy_ips(self): if not self.is_last(): return self.update_ip() else: with open('%s/ip.json' % self.path, 'r') as f: return json.load(f)
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