python下载网页源码

#!/usr/bin/python

import httplib
httpconn = httplib.HTTPConnection("www.baidu.com")
httpconn.request("GET", "/index.html")
resp = httpconn.getresponse()
if resp.reason == "OK":
	resp_data = resp.read()
	print resp_data
	print len(resp_data)

httpconn.close()

 要下载的网页源码被读取到了resp_data中了，但是到底能存储多少长度的文本，我也没有测试过。