old_contents: # Licensed to the StackStorm, Inc ('StackStorm') under one or more
  # contributor license agreements.  See the NOTICE file distributed with
  # this work for additional information regarding copyright ownership.
  # The ASF licenses this file to You under the Apache License, Version 2.0
  # (the "License"); you may not use this file except in compliance with
  # the License.  You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import six
  
  from st2common import log as logging
  from st2common.router import Response
  from st2common.util.jsonify import json_encode
  from st2common.stream.listener import get_listener
  
  __all__ = [
      'StreamController'
  ]
  
  LOG = logging.getLogger(__name__)
  
  DEFAULT_EVENTS_WHITELIST = [
      'st2.announcement__*',
  
      'st2.execution__create',
      'st2.execution__update',
      'st2.execution__delete',
  
      'st2.liveaction__create',
      'st2.liveaction__update',
      'st2.liveaction__delete',
  ]
  
  
  def format(gen):
      message = '''event: %s\ndata: %s\n\n'''
  
      for pack in gen:
          if not pack:
              # Note: gunicorn wsgi handler expect bytes, not unicode
              yield six.binary_type('\n')
          else:
              (event, body) = pack
              # Note: gunicorn wsgi handler expect bytes, not unicode
              yield six.binary_type(message % (event, json_encode(body, indent=None)))
  
  
  class StreamController(object):
      def get_all(self, events=None, action_refs=None, execution_ids=None, requester_user=None):
          events = events.split(',') if events else DEFAULT_EVENTS_WHITELIST
          action_refs = action_refs.split(',') if action_refs else None
          execution_ids = execution_ids.split(',') if execution_ids else None
  
          def make_response():
              listener = get_listener(name='stream')
              app_iter = format(listener.generator(events=events, action_refs=action_refs,
                                                   execution_ids=execution_ids))
              res = Response(content_type='text/event-stream', app_iter=app_iter)
              return res
  
          stream = make_response()
  
          return stream
  
  
  stream_controller = StreamController()
  
new_contents: # Licensed to the StackStorm, Inc ('StackStorm') under one or more
  # contributor license agreements.  See the NOTICE file distributed with
  # this work for additional information regarding copyright ownership.
  # The ASF licenses this file to You under the Apache License, Version 2.0
  # (the "License"); you may not use this file except in compliance with
  # the License.  You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import six
  
  from st2common import log as logging
  from st2common.router import Response
  from st2common.util.jsonify import json_encode
  from st2common.stream.listener import get_listener
  
  __all__ = [
      'StreamController'
  ]
  
  LOG = logging.getLogger(__name__)
  
  DEFAULT_EVENTS_WHITELIST = [
      'st2.announcement__*',
  
      'st2.execution__create',
      'st2.execution__update',
      'st2.execution__delete',
  
      'st2.liveaction__create',
      'st2.liveaction__update',
      'st2.liveaction__delete',
  ]
  
  
  def format(gen):
      message = '''event: %s\ndata: %s\n\n'''
  
      for pack in gen:
          if not pack:
              # Note: gunicorn wsgi handler expect bytes, not unicode
              yield six.binary_type('\n')
          else:
              (event, body) = pack
              # Note: gunicorn wsgi handler expect bytes, not unicode
              yield six.binary_type(message % (event, json_encode(body, indent=None)))
  
  
  class StreamController(object):
      def get_all(self, events=None, action_refs=None, execution_ids=None, requester_user=None):
          events = events if events else DEFAULT_EVENTS_WHITELIST
          action_refs = action_refs if action_refs else None
          execution_ids = execution_ids if execution_ids else None
  
          def make_response():
              listener = get_listener(name='stream')
              app_iter = format(listener.generator(events=events, action_refs=action_refs,
                                                   execution_ids=execution_ids))
              res = Response(content_type='text/event-stream', app_iter=app_iter)
              return res
  
          stream = make_response()
  
          return stream
  
  
  stream_controller = StreamController()
  
subject: Update more affected code.