old_contents: # -*- coding: utf-8 -*-
  """These JSON-formatted views require authentication."""
  
  from flask import Blueprint, jsonify, request, current_app, g
  from werkzeug.exceptions import NotFound
  from os.path import join
  from ..dl import download
  from ..error import handle_errors
  from ..util import enforce_auth
  
  private = Blueprint(__name__, 'private')
  private.before_request(enforce_auth)
  
  
  @handle_errors(private)
  def json_error(e):
      """Return an error response like {"msg":"Method not allowed"}."""
      return jsonify({'msg': e.name}), e.code
  
  
  @private.route('/download/<site_id>/<int:param>', methods=['POST'])
  def home(site_id, param):
      """Attempt to download the file."""
      if site_id in current_app.config['SITES']:
          site = current_app.config['SITES'][site_id]
          g.site = site
          url = site['url'].format(param)
          filename = site['filename'].format(param)
          path = join(site['path'], filename)
          download(url, path)
          return jsonify({})
      raise NotFound
  
  
  @private.after_request
  def cors(response):
      """Handle browser cross-origin requests."""
      if 'origin' in request.headers:
          site = g.get('site')
          if site:
              allowed_origin = site['origin']
              response.headers['Access-Control-Allow-Origin'] = allowed_origin
      return response
  
new_contents: # -*- coding: utf-8 -*-
  """These JSON-formatted views require authentication."""
  
  from flask import Blueprint, jsonify, request, current_app, g
  from werkzeug.exceptions import NotFound
  from os.path import join
  from ..dl import download
  from ..error import handle_errors
  from ..util import enforce_auth
  
  private = Blueprint(__name__, 'private')
  private.before_request(enforce_auth)
  
  
  @handle_errors(private)
  def json_error(e):
      """Return an error response like {"msg":"Not Found"}."""
      return jsonify({'msg': e.name}), e.code
  
  
  @private.route('/download/<site_id>/<int:param>', methods=['POST'])
  def home(site_id, param):
      """Attempt to download the file."""
      if site_id in current_app.config['SITES']:
          site = current_app.config['SITES'][site_id]
          g.site = site
          url = site['url'].format(param)
          filename = site['filename'].format(param)
          path = join(site['path'], filename)
          download(url, path)
          return jsonify({})
      raise NotFound
  
  
  @private.after_request
  def cors(response):
      """Handle browser cross-origin requests."""
      if 'origin' in request.headers:
          site = g.get('site')
          if site:
              allowed_origin = site['origin']
              response.headers['Access-Control-Allow-Origin'] = allowed_origin
      return response
  
subject: Use a better example error message