old_contents: import json
  
  import tornado.ioloop
  import tornado.httpserver
  import tornado.web
  
  from backend.optimizer.utils import get_data
  from backend.optimizer.optimize import optimize_portfolio
  
  from tornado.options import define, options, parse_command_line
  
  # Add command line flags
  define("port", default=8000, help="run on the given port", type=int)
  define("debug", default=False, help="run in debug mode")
  
  
  class MainHandler(tornado.web.RequestHandler):
      """Handles post requests by responding with a JSON file."""
      @tornado.web.asynchronous
      def get(self):
          """Respond to GET requests for debugging purposes."""
          self.write("Success!")
          self.finish()
  
      @tornado.web.asynchronous
      def post(self):
          """Respond to POST requests with optimal allocations."""
          data = json.loads(self.request.body.decode('utf-8'))
          stock_params = dict(data)
          allocs = optimize_allocations(stock_params)
          self.write(allocs)
          self.finish()
  
  
  def make_app():
      tornado.options.parse_command_line()
      return tornado.web.Application([
          (r"/", MainHandler)
      ])
  
  
  def optimize_allocations(stock_params):
      """Call methods to get stock data and find optimal allocations."""
      prices = get_data(stock_params)
      allocs = optimize_portfolio(prices)
      return allocs
  
  
  def main():
      """Runs application on httpserver with handler for '/'."""
      app = make_app()
      http_server = tornado.httpserver.HTTPServer(app)
      http_server.listen(options.port)
      tornado.ioloop.IOLoop.current().start()
  
  if __name__ == "__main__":
      main()
  
new_contents: import json
  
  import tornado.ioloop
  import tornado.httpserver
  import tornado.web
  
  from backend.optimizer.utils import get_data
  from backend.optimizer.optimize import optimize_portfolio
  
  from tornado.options import define, options, parse_command_line
  
  # Add command line flags
  define("port", default=8000, help="run on the given port", type=int)
  define("debug", default=False, help="run in debug mode")
  
  
  class MainHandler(tornado.web.RequestHandler):
      """Handles post requests by responding with a JSON file."""
      @tornado.web.asynchronous
      def get(self):
          """Respond to GET requests for debugging purposes."""
          self.write("Success!")
          self.finish()
  
      @tornado.web.asynchronous
      def post(self):
          """Respond to POST requests with optimal allocations."""
          data = json.loads(self.request.body.decode('utf-8'))
          stock_params = dict(data)
          allocs = optimize_allocations(stock_params)
          self.write(allocs)
          self.finish()
  
  
  def make_app():
      tornado.options.parse_command_line()
      return tornado.web.Application([
          (r"/", MainHandler),
          (r"/backend", MainHandler)
      ])
  
  
  def optimize_allocations(stock_params):
      """Call methods to get stock data and find optimal allocations."""
      prices = get_data(stock_params)
      allocs = optimize_portfolio(prices)
      return allocs
  
  
  def main():
      """Runs application on httpserver with handler for '/'."""
      app = make_app()
      http_server = tornado.httpserver.HTTPServer(app)
      http_server.listen(options.port)
      tornado.ioloop.IOLoop.current().start()
  
  if __name__ == "__main__":
      main()
  
subject: Add handler for /backend.