old_contents: import os
  import io
  import json
  
  from aiohttp import web
  
  
  class Handler:
      def __init__(self, *, loop):
          self.loop = loop
  
          self.files = {}
  
      def lookup_files(self, path):
          for obj in os.listdir(path):
              _path = os.path.join(path, obj)
  
              if os.path.isfile(_path) or os.path.islink(_path):
                  name, _ = os.path.splitext(obj)
  
                  with io.open(_path, mode='rt', encoding='utf-8') as fp:
                      self.files[name] = json.dumps(json.load(fp)).encode('utf-8')  # noqa
  
      def browsers(self, request):
          version = request.match_info['version']
  
          if version not in self.files:
              raise web.HTTPNotFound(
                  text='No data was found for version {version}'.format(
                      version=version,
                  ),
              )
  
          return web.json_response(body=self.files[version])
  
new_contents: import os
  import io
  import json
  
  from aiohttp import web
  
  
  class Handler:
      def __init__(self, *, loop):
          self.loop = loop
  
          self.files = {}
  
      def lookup_files(self, path):
          for obj in os.listdir(path):
              _path = os.path.join(path, obj)
  
              if os.path.isfile(_path):
                  name, _ = os.path.splitext(obj)
  
                  with io.open(_path, mode='rt', encoding='utf-8') as fp:
                      self.files[name] = json.dumps(json.load(fp)).encode('utf-8')  # noqa
  
      def browsers(self, request):
          version = request.match_info['version']
  
          if version not in self.files:
              raise web.HTTPNotFound(
                  text='No data was found for version {version}'.format(
                      version=version,
                  ),
              )
  
          return web.json_response(body=self.files[version])
  
subject: Remove extra check of symlinks.