代理捕获代码

import urllib.request
from bs4 import BeautifulSoup
import re
import time
import random

# --------------------公用方法-----------------------------
class CommanCalss:
def __init__(self):
self.header={'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.94 Safari/537.36'}
self.testurl="www.baidu.com"

def getresponse(self,url):
req = urllib.request.Request(url, headers=self.header)
resp = urllib.request.urlopen(req, timeout=5)
content = resp.read()
return content

def _is_alive(self,proxy):
try:
resp=0
for i in range(3):
proxy_support = urllib.request.ProxyHandler({"http": proxy})
opener = urllib.request.build_opener(proxy_support)
urllib.request.install_opener(opener)
req = urllib.request.Request(self.url, headers=self.header)
# 访问
resp = urllib.request.urlopen(req, timeout=5)
if resp == 200:
return True
except:
return False

 

# -----------代理池-----------------------
class ProxyPool:
def __init__(self,proxy_finder):
self.pool=[]
self.proxy_finder=proxy_finder
self.cominstan=CommanCalss()

def get_proxies(self):
self.pool=self.proxy_finder.find()
for p in self.pool:
if self.cominstan._is_alive(p):
continue
else:
self.pool.remove(p)

def get_one_proxy(self):
return random.choice(self.pool)

def writeToTxt(self,file_path):
try:
fp = open(file_path, "w+")
for item in self.pool:
fp.write(str(item) + "\n")
fp.close()
except IOError:
print("fail to open file")

#----------------------获取代理方法---------------------
#定义一个基类
class IProxyFinder:
def __init__(self):
self.pool = []

def find(self):
return

#西祠代理爬取
class XiciProxyFinder(IProxyFinder):
def __init__(self, url):
super(XiciProxyFinder,self).__init__()
self.url=url
self.cominstan = CommanCalss()

def find(self):
for i in range(1, 10):
content = self.cominstan.getresponse(self.url + str(i))
soup = BeautifulSoup(content, 'lxml')
ips = soup.findAll('tr')
for x in range(2, len(ips)):
ip = ips[x]
tds = ip.findAll("td")
if tds == []:
continue
ip_temp = tds[1].contents[0] + ":" + tds[2].contents[0]
self.pool.append(ip_temp)
time.sleep(1)
return self.pool

#---------------------测试--------------------------------
if __name__ == '__main__':
finder = XiciProxyFinder("http://www.xicidaili.com/wn/")
ppool_instance = ProxyPool(finder)
ppool_instance.get_proxies()
ppool_instance.writeToTxt("proxy.txt")