import httplib2
import aacs

ht = httplib2.Http()
url = "http://someurl.com/rss"

cookie = {}
hd = {
  'User-Agent':'Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.0 (KHTML, like Gecko) Chrome/24.6.5128.7 Safari/536.0',
    'Accept-Language':'zh-CN,zh;q=0.8',
    'Accept-Charset':'utf-8;q=0.7,*;q=0.7',
    'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
    'Connection': 'keep-alive',
    'Accept-Encoding':'gzip,deflate',
}
resp, ct = ht.request(url, headers = hd)
if aacs.autodetect(resp, ct, ht, cookie, hd, url):
    #request again
    hd.update({"Cookie":aacs.mkcookie(cookie)})
    resp, ct = ht.request(url, headers = hd)