old_contents: from __future__ import absolute_import
  from __future__ import unicode_literals
  
  # Import flask and template operators
  from flask import Flask, request, render_template
  
  # Define the WSGI application object
  app = Flask(__name__)
  
  # Configurations
  app.config.from_object('config.default')
  
  # Configure webhooks
  from .webhooks import WebHooks
  webhooks = WebHooks(app)
  
  from .gitlab import GitlabWebHook
  webhooks.add_handler('gitlab', GitlabWebHook)
  
  # Configure logging
  import logging
  from logging.handlers import TimedRotatingFileHandler
  from logging import Formatter
  
  # Configure the application log
  if app.config.get('APPLICATION_LOG', None):
      application_log_handler = TimedRotatingFileHandler(app.config.get('APPLICATION_LOG'), 'd', 7)
      application_log_handler.setLevel(logging.INFO)
      application_log_handler.setFormatter(Formatter(
          '%(asctime)s %(levelname)s: %(message)s '
          '[in %(pathname)s:%(lineno)d]'
      ))
      app.logger.addHandler(application_log_handler)
  
  # Sample HTTP error handling
  @app.errorhandler(404)
  def not_found(error):
      return render_template('404.html'), 404
  
  # Import modules
  from app.public import views as public_views
  from app.hooks import views as hook_views
  
new_contents: from __future__ import absolute_import
  from __future__ import unicode_literals
  
  # Import flask and template operators
  from flask import Flask, request, render_template
  
  # Define the WSGI application object
  app = Flask(__name__)
  
  # Configurations
  app.config.from_object('config.default')
  
  # Configure webhooks
  from .webhooks import WebHooks
  webhooks = WebHooks(app)
  
  from .gitlab import GitlabWebHook
  webhooks.add_handler('gitlab', GitlabWebHook)
  
  # Configure Slacker
  from slacker import Slacker
  slack = Slacker(app.config.get('SLACK_TOKEN'))
  
  # Configure logging
  import logging
  from logging.handlers import TimedRotatingFileHandler
  from logging import Formatter
  
  # Configure the application log
  if app.config.get('APPLICATION_LOG', None):
      application_log_handler = TimedRotatingFileHandler(app.config.get('APPLICATION_LOG'), 'd', 7)
      application_log_handler.setLevel(logging.INFO)
      application_log_handler.setFormatter(Formatter(
          '%(asctime)s %(levelname)s: %(message)s '
          '[in %(pathname)s:%(lineno)d]'
      ))
      app.logger.addHandler(application_log_handler)
  
  # Sample HTTP error handling
  @app.errorhandler(404)
  def not_found(error):
      return render_template('404.html'), 404
  
  # Import modules
  from app.public import views as public_views
  from app.hooks import views as hook_views
  
subject: Configure slacker on app initialization