复制代码 代码如下:

def getRemoteFileSize(url, proxy=None):

""" 通过content-length头获取远程文件大小

url - 目标文件URL

proxy - 代理 """

opener = urllib2.build_opener()

if proxy:

if url.lower().startswith('https://'):

opener.add_handler(urllib2.ProxyHandler({'https' : proxy}))

else:

opener.add_handler(urllib2.ProxyHandler({'http' : proxy}))

try:

request = urllib2.Request(url)

request.get_method = lambda: 'HEAD'

response = opener.open(request)

response.read()

except Exception, e:# 远程文件不存在

return 0

else:

fileSize = dict(response.headers).get('content-length', 0)

return int(fileSize)