参考网上高手示例程序，利用了多线程技术，Python版本为2.7
#-*-coding:utf8-*-import urllib2
import re
import threading
import timerawProxyList = []
checkedProxyList = []#抓取代理网站
targets=[]
for i in range(1,6):target = r"http://www.xici.net.co/nn/%d" % itargets.append(target)
# print targets#正则
p = re.compile(r'''<tr class=".+?(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})</td>.+?(\d{2,4})</td>.+?<td>(.{4,5})</td>''',re.DOTALL)#获取代理的类
class ProxyGet(threading.Thread):def __init__(self,target):threading.Thread.__init__(self)self.target = targetdef getProxy(self):print "目标网站："+self.targetreq = urllib2.urlopen(self.target)result = req.read()matchs = p.findall(result)for row in matchs:ip = row[0]port = row[1]agent = row[2]addr=agent+'://'+ip+':'+portproxy = [ip,port,addr]rawProxyList.append(proxy)def run(self):self.getProxy()#检验代理类
class ProxyCheck(threading.Thread):def __init__(self,proxyList):threading.Thread.__init__(self)self.proxyList = proxyListself.timeout=5self.testUrl = "http://www.baidu.com/"self.testStr = "030173"def checkProxy(self):cookies = urllib2.HTTPCookieProcessor()for proxy in self.proxyList:proxyHandler = urllib2.ProxyHandler({"http" : r'http://%s:%s' %(proxy[0],proxy[1])})opener=urllib2.build_opener(cookies,proxyHandler)opener.addheaders =[('User-Agent','Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36')]t1 = time.time()try:req = opener.open(self.testUrl,timeout=self.timeout)result=req.read()timeused = time.time()-t1pos = result.find(self.testStr)if pos > 1:checkedProxyList.append((proxy[0],proxy[1],proxy[2],timeused))else:continueexcept Exception,e:continuedef run(self):self.checkProxy()if __name__ == "__main__":getThreads=[]checkThreads=[]#对每个目标网站开启一个线程负责抓取代理
for i in range(len(targets)):t = ProxyGet(targets[i])getThreads.append(t)for i in range(len(getThreads)):getThreads[i].start()for i in range(len(getThreads)):getThreads[i].join()print '.'*10+"总共抓取了%s个代理" %len(rawProxyList) +'.'*10#开启20个线程负责校验，将抓取到的代理分成20份，每个线程校验一份
for i in range(20):t = ProxyCheck(rawProxyList[((len(rawProxyList)+19)/20) * i:((len(rawProxyList)+19)/20) * (i+1)])checkThreads.append(t)for i in range(len(checkThreads)):checkThreads[i].start()for i in range(len(checkThreads)):checkThreads[i].join()print '.'*10+"总共有%s个代理通过校验" %len(checkedProxyList) +'.'*10#持久化
f= open("proxy_list.txt",'w+')
for proxy in sorted(checkedProxyList,cmp=lambda x,y:cmp(x[3],y[3])):print "checked proxy is: %s:%s\t%s\t%s" %(proxy[0],proxy[1],proxy[2],proxy[3])f.write("%s:%s\t%s\t%s\n"%(proxy[0],proxy[1],proxy[2],proxy[3]))
f.close()
