python多线程抓取代理服务器

#coding: utf-8

import urllib2
import re
import time
import threading
import MySQLdb

rawProxyList = []
checkedProxyList = []

#抓取代理网站
targets = []
for i in xrange(1, 23):
target = r"http://www.proxy.com.ru/list_%d.html" % i
targets.append(target)
#print target + "\n"

#抓取代理服务器正则
p = re.compile(r'''<tr><b><td>(\d+)</td><td>(.+?)</td><td>(\d+)</td><td>(.+?)</td><td>(.+?)</td></b></tr>''')

#获取代理的类

class ProxyGet(threading.Thread):
def __init__(self, target):
threading.Thread.__init__(self)
self.target = target

def getProxy(self):
req = urllib2.Request(self.target)
respnse = urllib2.urlopen(req)
result = respnse.read()
matches = p.findall(result)
#print matches
for row in matches:
ip = row[1]
port = row[2]
addr = row[4].decode("cp936").encode("utf-8")
proxy = [ip, port, addr]
#print proxy
rawProxyList.append(proxy)

def run(self):
self.getProxy()

#核对代理是否有效的类
class ProxyCheck(threading.Thread):
def __init__(self,proxyList):
threading.Thread.__init__(self)
self.proxyList = proxyList
self.timeout = 5
self.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])})
#print r'http://%s:%s' %(proxy[0],proxy[1])
opener = urllib2.build_opener(cookies, proxyHandler)
opener.addheaders = [('User-agent', 'Mozilla/5.0 (Windows NT 6.2; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0')]
#urllib2.install_opener(opener)
t1 = time.time()

try:
#req = urllib2.urlopen("http://www.baidu.com", timeout=self.timeout)
req = opener.open(self.testUrl, timeout=self.timeout)
#print "urlopen is ok...."
result = req.read()
#print "read html...."
timeused = time.time() - t1
pos = result.find(self.testStr)
#print "pos is %s" %pos

if pos >= 1:
checkedProxyList.append((proxy[0], proxy[1], proxy[2], timeused))
print "ok ip: %s %s %s %s" %(proxy[0],proxy[1],proxy[2],timeused)
else:
continue
except Exception, e:
#print e.message
continue

def 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 + "总共抓取了%s个代理" % len(checkedProxyList) + '.'*10

#插入数据库，四个字段ip, port, speed, addr
def db_insert(insert_list):
try:
conn = MySQLdb.connect(host="127.0.0.1", user="root", passwd="meimei1118", db="ctdata", charset='utf8')
cursor = conn.cursor()
cursor.execute('delete from proxy')
cursor.execute('alter table proxy AUTO_INCREMENT=1')
cursor.executemany("INSERT INTO proxy(ip,port,speed,address) VALUES(%s, %s, %s,%s)", insert_list)
conn.commit()
cursor.close()
conn.close()

except MySQLdb.Error, e:
print "Mysql Error %d: %s" %(e.args[0], e.args[1])

#代理排序持久化
proxy_ok = []
for proxy in sorted(checkedProxyList, cmp=lambda x, y: cmp(x[3], y[3])):
if proxy[3] < 8:
#print "checked proxy is: %s:%s\t%s\t%s" %(proxy[0],proxy[1],proxy[2],proxy[3])
proxy_ok.append((proxy[0], proxy[1], proxy[3], proxy[2]))

db_insert(proxy_ok)