def notification_from_headers(channel, headers):
 headers = _upper_header_keys(headers)
 channel_id = headers[X_GOOG_CHANNEL_ID]
 if (channel.id != channel_id):
  raise errors.InvalidNotificationError(('Channel id mismatch: %s != %s' % (channel.id, channel_id)))
 else:
  message_number = int(headers[X_GOOG_MESSAGE_NUMBER])
  state = headers[X_GOOG_RESOURCE_STATE]
  resource_uri = headers[X_GOOG_RESOURCE_URI]
  resource_id = headers[X_GOOG_RESOURCE_ID]
  return Notification(message_number, state, resource_uri, resource_id)

def notification_from_headers ( channel , headers ) : headers = _upper_header_keys ( headers ) channel_id = headers [ X_GOOG_CHANNEL_ID ] if ( channel . id != channel_id ) : raise errors . InvalidNotificationError ( ( 'Channel id mismatch: %s != %s' % ( channel . id , channel_id ) ) ) else : message_number = int ( headers [ X_GOOG_MESSAGE_NUMBER ] ) state = headers [ X_GOOG_RESOURCE_STATE ] resource_uri = headers [ X_GOOG_RESOURCE_URI ] resource_id = headers [ X_GOOG_RESOURCE_ID ] return Notification ( message_number , state , resource_uri , resource_id )
parse a notification from the webhook request headers .