Python使用代理抓取网站图片（多线程）
来源：
中文源码网 浏览：247 次 日期：2024-05-08 05:22:28
【下载文档: Python使用代理抓取网站图片（多线程）.txt 】
Python使用代理抓取网站图片（多线程）
一、功能说明：1. 多线程方式抓取代理服务器，并多线程验证代理服务器ps 代理服务器是从http://www.cnproxy.com/ （测试只选择了8个页面）抓取2. 抓取一个网站的图片地址，多线程随机取一个代理服务器下载图片二、实现代码复制代码 代码如下:#!/usr/bin/env python#coding:utf-8
import urllib2import reimport threadingimport timeimport random
rawProxyList = []checkedProxyList = []imgurl_list = []
#抓取代理网站portdicts ={'v':"3",'m':"4",'a':"2",'l':"9",'q':"0",'b':"5",'i':"7",'w':"6",'r':"8",'c':"1"}targets = []for i in xrange(1,9): target = r"http://www.cnproxy.com/proxy%d.html" % i targets.append(target)#print targets
#抓取代理服务器正则p = re.compile(r'''
| (.+?) | (.+?) | .+? | (.+?) |
''')
#获取代理的类class ProxyGet(threading.Thread): def __init__(self,target): threading.Thread.__init__(self) self.target = target
def getProxy(self): print "代理服务器目标网站： " + self.target req = urllib2.urlopen(self.target) result = req.read() #print chardet.detect(result) matchs = p.findall(result) for row in matchs: ip=row[0] port =row[1] port = map(lambda x:portdicts[x],port.split('+')) port = ''.join(port) agent = row[2] addr = row[3].decode("cp936").encode("utf-8") proxy = [ip,port,addr] #print proxy rawProxyList.append(proxy)
def run(self): self.getProxy()
#检验代理的类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()
#获取图片地址函数def imgurlList(url_home): global imgurl_list home_page = urllib2.urlopen(url_home) url_re = re.compile(r'
') pic_re = re.compile(r')
#下载图片的类class getPic(threading.Thread): def __init__(self,imgurl_list): threading.Thread.__init__(self) self.imgurl_list = imgurl_list self.timeout = 5 def downloadimg(self): for imgurl in self.imgurl_list: pic_suffix = imgurl.split('.')[-1] #获取图片后缀 pic_name = str(random.randint(0,10000000000))+'.'+pic_suffix cookies = urllib2.HTTPCookieProcessor() randomCheckedProxy = random.choice(checkedProxyList) #随机取一组代理服务器 proxyHandler = urllib2.ProxyHandler({"http" : r'http://%s:%s' %(randomCheckedProxy[0],randomCheckedProxy[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) try: data_img = opener.open(imgurl,timeout=self.timeout) f = open (pic_name,'wb') f.write(data_img.read()) f.close() except: continue def run(self): self.downloadimg()
if __name__ == "__main__": getThreads = [] checkThreads = [] imgurlList('http://www.ivsky.com') getPicThreads = []
#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
#开启20个线程随机取一个代理下载图片for i in range(20): t = getPic(imgurl_list[((len(imgurl_list)+19)/20) * i:((len(imgurl_list)+19)/20) * (i+1)]) getPicThreads.append(t)
for i in range(len(getPicThreads)): getPicThreads[i].start()
for i in range(len(getPicThreads)): getPicThreads[i].join()
print '.'*10+"总共有%s个图片下载" %len(imgurl_list) +'.'*10
#代理排序持久化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()
二、测试结果：复制代码 代码如下:# lsproxy_getpic.py# python proxy_getpic.py代理服务器目标网站： http://www.cnproxy.com/proxy1.html代理服务器目标网站： http://www.cnproxy.com/proxy2.html代理服务器目标网站： http://www.cnproxy.com/proxy3.html代理服务器目标网站： http://www.cnproxy.com/proxy4.html代理服务器目标网站： http://www.cnproxy.com/proxy5.html代理服务器目标网站： http://www.cnproxy.com/proxy6.html代理服务器目标网站： http://www.cnproxy.com/proxy7.html代理服务器目标网站： http://www.cnproxy.com/proxy8.html..........总共抓取了800个代理....................总共有458个代理通过校验....................总共有154个图片下载..........# cat proxy_list.txt | more173.213.113.111:3128 United States 0.432188987732173.213.113.111:8089 United States 0.441318035126173.213.113.111:7808 United States 0.444597005844110.4.24.170:80 香港 香港移动通讯有限公司 0.489440202713211.142.236.135:8080 湖南省株洲市 移动 0.490673780441211.142.236.135:8081 湖南省株洲市 移动 0.518096923828211.142.236.135:8000 湖南省株洲市 移动 0.51860499382211.142.236.135:8082 湖南省株洲市 移动 0.520448207855# ls1001117689.jpg 3097883176.jpg 5234319709.jpg 7012274766.jpg 8504924248.jpg1076458640.jpg 3144369522.jpg 5387877704.jpg 7106183143.jpg 867723868.jpg1198548712.jpg 3161307031.jpg 5572092752.jpg 7361254661.jpg 8746315373.jpg165738192.jpg 3228008315.jpg 5575388077.jpg 7389537793.jpg 8848973192.jpg1704512138.jpg 3306931164.jpg 5610740708.jpg 7407358698.jpg 8973834958.jpg1742167711.jpg 3320152673.jpg 5717429022.jpg 7561176207.jpg 8976862152.jpg...............
