def ws_call(signal_name, request, sharing, kwargs):
""" Call a JS signal from the Python side.
:param signal_name: name of signal
:type signal_name:
:param request: a SignalRequest with session_key and username
:type request: :class:`djangofloor.decorators.SignalRequest`
:param sharing: the required sharing. Can be SESSION, USER or BROADCAST or any dict which is valid for django-websockets-redis.
:type sharing:
:param kwargs: options to pass to the JS signal
:type kwargs:
:return: `None`
"""
if isinstance(sharing, binary_type):
sharing = force_text(sharing)
if sharing == SESSION:
sharing = {SESSION: [request.session_key, ]}
elif sharing == USER:
sharing = {USER: [request.username, ]}
elif sharing == BROADCAST:
sharing = {BROADCAST: True}
if BROADCAST in sharing:
sharing[BROADCAST] = True
redis_publisher = RedisPublisher(facility=settings.FLOOR_WS_FACILITY, **sharing)
msg = json.dumps({'signal': signal_name, 'options': kwargs}, cls=get_signal_encoder())
redis_publisher.publish_message(RedisMessage(msg.encode('utf-8')))
def signal_call(request, signal):
""" Called by JS code when websockets are not available. Allow to call Python signals from JS.
Arguments are passed in the request body, serialized as JSON.
:param signal: name of the called signal
:type signal: :class:`str`
"""
import_signals()
if request.body:
kwargs = json.loads(request.body.decode('utf-8'), cls=get_signal_decoder())
else:
kwargs = {}
try:
result = df_call(signal, request, sharing=RETURN, from_client=True, kwargs=kwargs)
except InvalidRequest:
result = []
return JsonResponse(result, safe=False, encoder=get_signal_encoder())