python从网络下载文件并获得文件大小、文件类型详解编程语言

import urllib2 
from settings import COOKIES 
   
opener = urllib2.build_opener() 
   
cookies = ";".join("%s=%s" % (k, v) for k, v in COOKIES.items()) 
opener.addheaders.append(('Cookie', cookies)) 
   
req = opener.open(link) 
meta = req.info() 
file_size = int(meta.getheaders("Content-Length")[0]) 
content_type = meta.getheaders('Content-Type')[0].split(';')[0] 
print file_size, content_type 
open(file_name, 'wb').write(req.read())