urllib2处理请求，一直报BadStatusLine错误

Question

import urllib,urllib2,cookielib

loginurl='http://192.168.1.80/login.htm'

cj = cookielib.CookieJar()
opener=urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))

headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36',
    'Connection': 'keep-alive',
    'Host': '192.168.1.80',
    'Referer': 'http://192.168.1.80/firstpage.htm',
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8'
}    

for key in headers: 
    opener.addheaders.append((key,headers[key]))

data = urllib.urlencode({"log_in":'00000000',"submit":'登录'})
opener.open(loginurl,data)

一直报：BadStatusLine: 错误，大神，请教怎么处理~~