old_contents: import picoweb
  from config import model
  from util import handler, ok
  
  def get(req, res):
    req.parse_qs()
    yield from ok(res, model.load(req.form['name'][0]))
  
  def set(req, res):
    yield from req.read_form_data()
    cfg = model.load()
    for key, value in req.form.items():
      cfg[key] = value
    model.save(cfg)
    yield from get(req, res)
  
  def reset(req, res):
    yield from ok(res)
    model.reset()
  
  def factory(req, res):
    model.factory()
    from wlan.ap import controller
    yield from controller.get(req, res)
  
  def crud(req, res):
    ret = {
      'GET': get,
      'PUT': set
    }
    yield from ret[req.method](req, res)
  
  class Config:
    def __init__(self, filename):
      self.filename = filename
  
    def load(self):
      f = open(self.filename)
      data = ujson.load(f)
      f.close()
      return data
  
    def save(self, data):
      f = open(self.filename, 'w')
      ujson.dump(data, f)
      f.close()
      return self
  
new_contents: import ujson
  import picoweb
  from config import model
  from util import handler, ok
  
  def get(req, res):
    req.parse_qs()
    yield from ok(res, model.load(req.form['name'][0]))
  
  def set(req, res):
    yield from req.read_form_data()
    cfg = model.load()
    for key, value in req.form.items():
      cfg[key] = value
    model.save(cfg)
    yield from get(req, res)
  
  def reset(req, res):
    yield from ok(res)
    model.reset()
  
  def factory(req, res):
    model.factory()
    from wlan.ap import controller
    yield from controller.get(req, res)
  
  def crud(req, res):
    ret = {
      'GET': get,
      'PUT': set
    }
    yield from ret[req.method](req, res)
  
  class Config:
    def __init__(self, filename):
      self.filename = filename
  
    def load(self):
      f = open(self.filename)
      data = ujson.load(f)
      f.close()
      return data
  
    def save(self, data):
      f = open(self.filename, 'w')
      ujson.dump(data, f)
      f.close()
      return self
  
subject: add missing module ujson