最近在学习python,正如大家所知，python在网络爬虫方面有着广泛的应用，下面是一个利用python程序抓取网络图片的简单程序，可以批量下载一个网站更新的图片，其中使用了代理IP的技术。
import urllib.request
import os
import random
def url_open(url):
req=urllib.request.Request(url)
req.add_header(\'User-Agent\',\'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0\')
\'\'\'iplist=[\'1.193.162.123:8000\',\'1.193.162.91:8000\',\'1.193.163.32:8000\']
proxy_support=urllib.request.ProxyHandler({\'http\':random.choice(iplist)})
opener=urllib.request.build_opener(proxy_support)
opener.addheaders=[(\'User-Agent\',\'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.154 Safari/537.36 LBBROWSER\')]
urllib.request.install_opener(opener)\'\'\'
response=urllib.request.urlopen(req)
html=response.read()
return html
def get_page(url):
html=url_open(url).decode(\'utf-8\')
a=html.find(\'current-comment-page\')+23
b=html.find(\']\',a)
return html[a:b]
def find_imgs(url):
html=url_open(url).decode(\'utf-8\')
img_addrs=[]
a=html.find(\'img src=\')
while a!=-1:
b=html.find(\'.jpg\',a,a+140)
if b!=-1:
if html[a+9]!=\'h\':
img_addrs.append(\'http:\'+html[a+9:b+4])
else:
img_addrs.append(html[a+9:b+4])
else:
b=a+9
a=html.find(\'img src=\',b)
for each in img_addrs:
print(each+\'我的打印\')
return img_addrs
def save_imgs(folder,img_addrs):
for each in img_addrs:
filename=each.split(\'/\')[-1]
with open(filename,\'wb\') as f:
img=url_open(each)
f.write(img)
def download_mm(folder=\'ooxx\',pages=10):
os.mkdir(folder)
os.chdir(folder)
url="http://jandan.net/ooxx/"
page_num=int(get_page(url))
for i in range(pages):
page_num=page_num-1
page_url=url+\'page-\'+str(page_num)+\'#comments\'
img_addrs=find_imgs(page_url)
save_imgs(folder,img_addrs)
if __name__==\'__main__\':
download_mm()
完成
运行结果
