text: #!/usr/bin/env python3
  
  import asyncio
  
  async def wget(host):
      print("wget %s ...", host)
      connect = asyncio.open_connection(host, 80)
      reader, writer = await connect
  
      header = 'GET / HTTP/1.0\r\nHost: %s\r\n\r\n' % host
      writer.write(header.encode())
      await writer.drain()
  
      while True:
          line = await reader.readline()
          if line == b'\r\n':
              break
          print("%s header > %s" % (host, line.decode().rstrip()))
      
      writer.close()
  
  
  loop = asyncio.get_event_loop()
  tasks = [wget(host) for host in ["www.sina.com", "www.sohu.com", "www.163.com"]]
  loop.run_until_complete(asyncio.wait(tasks))
  loop.close()
  
      