python3 图片referer防盗链的实现方法

import urllib.request import requests import time import os import shutil from lxml import html def getPage():   '''''   从网站首页获取妹子的网址   '''   fres=open('res.txt','w')   htm=urllib.request.urlopen('http://www.mzitu.com/')   out=htm.read()   out=html.fromstring(out)   urls=[]   for res in out.xpath('//ul[@id="pins"]/li/a/@href'):     urls.append(res)   for r in urls:     fres.write(r)     fres.write('/n/r')   fres.close()   return urls def getPiclink(url):   '''''   获取一个妹子的标题和她的所有图片地址   '''   i_headers={'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:55.0) Gecko/20100101 Firefox/55.0'}   sel=urllib.request.Request(url, headers=i_headers)   #使用代理浏览器访问网站   sel.add_header('Referer', 'http://www.mzitu.com/')   #将referer字段添加到请求包里   sel=urllib.request.urlopen(sel).read()   sel=html.fromstring(sel)   total=sel.xpath('//div[@class="pagenavi"]/a[last()-1]/span/text()')[0]  jpglist=[]   for i in range(int(total)):     link='{}/{}'.format(url, i+1)     s=html.fromstring(urllib.request.urlopen(link).read())     jpg=s.xpath('//div[@class="main-image"]/p/a/img/@src')[0]     jpglist.append(jpg)   return title,jpglist def downloadJpg(title,piclist,link):   '''''   下载getPiclink()获取到的妹子的图片   '''   k=1   count=len(piclist)   dirname=u"[%sP]%s" %(str(count),title)   if os.path.exists(dirname):     shutil.rmtree(dirname)   os.mkdir(dirname)   i_header={}   i_header['Referer']=link   #将getPiclink()获取到的妹子的首页网址作为referer字段的值   for i in piclist:     filename='%s/%s/%s.jpg' %(os.path.abspath('.'),dirname, k)     with open(filename,'wb') as jpg:       jpg.write(requests.get(i, headers=i_header).content)     #将referer字段添加到请求包里并下载图片       time.sleep(0.5)     k+=1 if __name__=='__main__':   for link in getPage():     title,pic=getPiclink(link)     downloadJpg(title,pic,link)   print('OK!')