[web2py] Problems with websocket_messaging

[Ali Mhrez]

I followed the video of Mr Bruno Rocha to implement simple websocket, the 
controller is very simple:
@auth.requires_login()
def index():
    form = SQLFORM(Post, formstyle='divs')
    if form.process().accepted:
        websocket_send('http://127.0.0.1:8888', 'hello', 'mykey', 'mygroup')
        pass
    messages = db(Post).select(orderby=~Post.created_on)
    return dict(form=form, messages=messages)

and in the view:
<script>
   $(document).ready(function(){
      if(!$.web2py.web2py_websocket('ws://127.0.0.1:8888/realtime/mygroup', 
function(e){alert(e.data)}))

         alert("html5 websocket not supported by your browser, try Google 
Chrome");
   });
   </script>

but when i open the view the server prints exceptions showed in the 
error_log file.
Any Help Please??

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C:\web2py_src>python gluon/contrib/websocket_messaging.py -k mykey -p 8888
ERROR:tornado.application:Uncaught exception in /realtime/mygroup
Traceback (most recent call last):
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\websocket.py",
 line 322, in wrapper
    return callback(*args, **kwargs)
  File "gluon/contrib/websocket_messaging.py", line 156, in open
    group, token, name = params.split('/') + [None, None]
TypeError: a bytes-like object is required, not 'str'
ERROR:tornado.application:Uncaught exception, closing connection.
Traceback (most recent call last):
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\iostream.py",
 line 354, in wrapper
    callback(*args)
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\stack_context.py",
 line 331, in wrapped
    raise_exc_info(exc)
  File "<string>", line 3, in raise_exc_info
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\stack_context.py",
 line 302, in wrapped
    ret = fn(*args, **kwargs)
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\httpserver.py",
 line 218, in _on_connection_close
    callback()
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\stack_context.py",
 line 331, in wrapped
    raise_exc_info(exc)
  File "<string>", line 3, in raise_exc_info
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\stack_context.py",
 line 302, in wrapped
    ret = fn(*args, **kwargs)
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\websocket.py",
 line 293, in on_connection_close
    self.on_close()
  File "gluon/contrib/websocket_messaging.py", line 179, in on_close
    if self.group in listeners:
AttributeError: 'DistributeHandler' object has no attribute 'group'
ERROR:tornado.application:Exception in callback functools.partial(<function 
wrap.<locals>.wrapped at 0x038A2E88>)
Traceback (most recent call last):
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\ioloop.py",
 line 477, in _run_callback
    callback()
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\stack_context.py",
 line 331, in wrapped
    raise_exc_info(exc)
  File "<string>", line 3, in raise_exc_info
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\stack_context.py",
 line 302, in wrapped
    ret = fn(*args, **kwargs)
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\iostream.py",
 line 354, in wrapper
    callback(*args)
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\stack_context.py",
 line 331, in wrapped
    raise_exc_info(exc)
  File "<string>", line 3, in raise_exc_info
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\stack_context.py",
 line 302, in wrapped
    ret = fn(*args, **kwargs)
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\httpserver.py",
 line 218, in _on_connection_close
    callback()
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\stack_context.py",
 line 331, in wrapped
    raise_exc_info(exc)
  File "<string>", line 3, in raise_exc_info
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\stack_context.py",
 line 302, in wrapped
    ret = fn(*args, **kwargs)
  File 
"C:\Users\alidm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\tornado\websocket.py",
 line 293, in on_connection_close
    self.on_close()
  File "gluon/contrib/websocket_messaging.py", line 179, in on_close
    if self.group in listeners:
AttributeError: 'DistributeHandler' object has no attribute 'group'