Python 获取下载文件的大小

# -*- coding: utf-8 -*-
from urlparse import urlparse
url = "http://im.baidu.com/download/BaiduHi_2.4_Beta.exe"
parsedurl = urlparse(url)
net_loc = parsedurl[1]
path = parsedurl[2]
httpConn = httplib.HTTPConnection(net_loc);
httpConn.request("GET", path)
r = httpConn.getresponse()
if r.status == 200:
size = r.getheader('Content-Length')
size = int(size) / 1024
print 'size:', size
print r.getheader('Content-Type')       #类型

print r.getheader('Last-Modified')      #修改时间

else:
print r.status, r.reason
httpConn.close()