new_contents: __author__ = 'wenzhouyang'
  
  #with python 3.4
  
  import urllib3
  import logging
  
  urllib3.add_stderr_logger(level=logging.DEBUG)
  userAgent = 'Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.114 Safari/537.36'
  headers = urllib3.make_headers(user_agent=userAgent)
  
  
  requestHeaders = {'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
                    'Accept-Encoding':'gzip,deflate,sdch',
                    'Accept-Language':'zh-CN,zh;q=0.8,en-US;q=0.6,en;q=0.4',
                    'Cache-Control':'max-age=0',
                    'User-agent':userAgent,
                    'Cookie':'cookie_name=cookie_value'}
  
  http = urllib3.PoolManager()
  r = http.request('GET', 'http://localhost:8081/manage/sayHello', headers=requestHeaders)
  cookie = r.getheader('Set-Cookie')
  
  requestHeaders['Cookie'] = cookie
  print(requestHeaders)
  r = http.request('GET', 'http://localhost:8081/manage/sayHello', headers=requestHeaders)
  print(cookie)
  print(r.data) #HTML
  
  
  
  
subject: add http demo with urllib3 for python 3