new_contents: import sys
  import json
  from pubcontrol import Item
  from gripcontrol import GripPubControl, WebSocketEvent, \
      WebSocketMessageFormat, decode_websocket_events, encode_websocket_events
  
  pub = GripPubControl({'control_uri': 'http://localhost:5561'})
  
  opening = False
  out_headers = []
  out = []
  for e in decode_websocket_events(sys.stdin.read()):
      if e.type == 'OPEN':
          if not opening:
              opening = True
  
              # enable GRIP
              out_headers.append(('Sec-WebSocket-Extensions', 'grip'))
  
              # ack the open
              out.append(e)
  
              # subscribe connection to channel
              cm = {'type': 'subscribe', 'channel': 'room'}
              out.append(WebSocketEvent('TEXT', 'c:%s' % json.dumps(cm)))
      elif e.type == 'CLOSE':
          out.append(e) # ack
          break
      elif e.type == 'TEXT':
          # broadcast to everyone
          pub.publish('room', Item(WebSocketMessageFormat(e.content)))
  
  out_headers.append(('Content-Type', 'application/websocket-events'))
  
  for header in out_headers:
      cm = {
          'type': 'setHeader',
          'payload': {
              'name': header[0],
              'value': header[1]
          }
      }
      sys.stderr.write('%s\n' % json.dumps(cm))
  
  sys.stdout.write(encode_websocket_events(out))
  
subject: Add serverless chat script