old_contents: from flask import Flask, render_template, send_from_directory, jsonify
  from burn.api import json_api
  import uuid
  
  app = Flask(__name__)
  
  AES_CIPHER_SIZE = 128
  
  
  @app.route("/")
  def index():
      maxlength = app.config.get('MAX_CONTENT_LENGTH', 1024*1024*10)
      return render_template("index.html", maxlength=maxlength)
  
  
  @app.route("/about")
  def about():
      return render_template("about.html")
  
  
  @app.route("/robots.txt")
  def robots():
      return send_from_directory(app.static_folder, 'robots.txt')
  
  
  @app.route("/<uuid:token>", methods=["GET"])
  def open(token):
      return render_template("open.html")
  
  
  app.register_blueprint(json_api, url_prefix='/api')
  
  
  @app.errorhandler(404)
  def page_not_found(e):
      return render_template("404.html"), 404
  
new_contents: from flask import Flask, render_template, send_from_directory, jsonify
  from burn.api import json_api
  import uuid
  
  app = Flask(__name__)
  
  
  @app.route("/")
  def index():
      maxlength = app.config.get('MAX_CONTENT_LENGTH', 1024*1024*10)
      return render_template("index.html", maxlength=maxlength)
  
  
  @app.route("/about")
  def about():
      return render_template("about.html")
  
  
  @app.route("/robots.txt")
  def robots():
      return send_from_directory(app.static_folder, 'robots.txt')
  
  
  @app.route("/<uuid:token>", methods=["GET"])
  def open(token):
      return render_template("open.html")
  
  
  app.register_blueprint(json_api, url_prefix='/api')
  
  
  @app.errorhandler(404)
  def page_not_found(e):
      return render_template("404.html"), 404
  
subject: remove unused variable