old_contents: from datetime import timedelta
  from flask import make_response, request, current_app
  from functools import update_wrapper, wraps
  
  
  def crossdomain(origin=None, methods=None, headers=None,
                  max_age=21600, attach_to_all=True,
                  automatic_options=True):
      if methods is not None:
          methods = ', '.join(sorted(x.upper() for x in methods))
      if headers is not None and not isinstance(headers, basestring):
          headers = ', '.join(x.upper() for x in headers)
      if not isinstance(origin, basestring):
          origin = ', '.join(origin)
      if isinstance(max_age, timedelta):
          max_age = max_age.total_seconds()
  
      def get_methods():
          if methods is not None:
              return methods
  
          options_resp = current_app.make_default_options_response()
          return options_resp.headers['allow']
  
      def decorator(f):
          def wrapped_function(*args, **kwargs):
              if automatic_options and request.method == 'OPTIONS':
                  resp = current_app.make_default_options_response()
              else:
                  resp = make_response(f(*args, **kwargs))
              if not attach_to_all and request.method != 'OPTIONS':
                  return resp
  
              h = resp.headers
  
              h['Access-Control-Allow-Origin'] = origin
              h['Access-Control-Allow-Methods'] = get_methods()
              h['Access-Control-Max-Age'] = str(max_age)
              if headers is not None:
                  h['Access-Control-Allow-Headers'] = headers
              return resp
  
          f.provide_automatic_options = False
          return update_wrapper(wrapped_function, f)
      return decorator
  
  def jsonp(func):
      """Wraps JSONified output for JSONP requests."""
      @wraps(func)
      def decorated_function(*args, **kwargs):
          callback = request.args.get('callback', False)
          if callback:
              data = str(func(*args, **kwargs).data)
              content = str(callback) + '(' + data + ')'
              mimetype = 'application/javascript'
              return current_app.response_class(content, mimetype=mimetype)
          else:
              return func(*args, **kwargs)
      return decorated_function
  
new_contents: from datetime import timedelta
  from flask import make_response, request, current_app
  from functools import update_wrapper, wraps
  
  
  def crossdomain(origin=None, methods=None, headers=None,
                  max_age=21600, attach_to_all=True,
                  automatic_options=True):
      if methods is not None:
          methods = ', '.join(sorted(x.upper() for x in methods))
      if headers is not None and not isinstance(headers, basestring):
          headers = ', '.join(x.upper() for x in headers)
      if not isinstance(origin, basestring):
          origin = ', '.join(origin)
      if isinstance(max_age, timedelta):
          max_age = max_age.total_seconds()
  
      def get_methods():
          if methods is not None:
              return methods
  
          options_resp = current_app.make_default_options_response()
          return options_resp.headers['allow']
  
      def decorator(f):
          def wrapped_function(*args, **kwargs):
              if automatic_options and request.method == 'OPTIONS':
                  resp = current_app.make_default_options_response()
              else:
                  resp = make_response(f(*args, **kwargs))
              if not attach_to_all and request.method != 'OPTIONS':
                  return resp
  
              h = resp.headers
  
              h['Access-Control-Allow-Origin'] = origin
              h['Access-Control-Allow-Methods'] = get_methods()
              h['Access-Control-Max-Age'] = str(max_age)
              if headers is not None:
                  h['Access-Control-Allow-Headers'] = headers
              return resp
  
          f.provide_automatic_options = False
          f.required_methods = ['OPTIONS']
          return update_wrapper(wrapped_function, f)
      return decorator
  
  def jsonp(func):
      """Wraps JSONified output for JSONP requests."""
      @wraps(func)
      def decorated_function(*args, **kwargs):
          callback = request.args.get('callback', False)
          if callback:
              data = str(func(*args, **kwargs).data)
              content = str(callback) + '(' + data + ')'
              mimetype = 'application/javascript'
              return current_app.response_class(content, mimetype=mimetype)
          else:
              return func(*args, **kwargs)
      return decorated_function
  
subject: Fix crossdomain decorator