text: import os
  from django.views.static import serve
  from django.http import HttpResponse
  
  
  def get_mime(filepath):
      """
      Use python-magic to get the mime type of a file.
  
      Args:
          filepath (str): Path to the file to be sniffed by magic
  
      Returns:
          str: Returns a string representing the mime type of the file.
      """
      import magic
      return magic.from_file(filepath, mime=True)
  
          
  def send_dev_server(request, filename, **kwargs):
      """
      Send a file using Django's development server.
  
      Args:
          request (HttpRequest): An instance of :class:`django.http.HttpRequest`
          filename (str): name of the file to be served
  
      Returns:
          FileResponse: An instance of class:`django.http.FileResponse`.
  
      """
      response = serve(request, filename, kwargs['doc_root'])
      # Django tries to pick an intelligent mime type
      # If magic, use it to help out
      if kwargs['use_magic'] and kwargs['has_magic']:
          response['Content-Type'] = get_mime(
             os.path.join(kwargs['doc_root'], filename)
          )
      response['Content-Disposition'] = ('attachment; filename=%s'
                                         % filename.split('/')[-1])
      return response
  
  
  def xsendfile(request, filename, **kwargs):
      """
      Send a file using an HTTP X-Sendfile.
  
      Args:
          request (HttpRequest): An instance of :class:`django.http.HttpRequest`
          filename (str): Name of the file to be served
  
      Returns:
          HttpResponse: An instance of :class:`django.http.HttpResponse`.
   
      """
  
      response = HttpResponse()
      path = os.path.join(kwargs['doc_root'], filename)
      response['X-Sendfile'] = path
      response['Content-Disposition'] = 'attachment; filename=%s' % filename
      # Delete default 'Content-Type', which indicates HTML, and let web server
      # try to get it right.
      del response['Content-Type']
      # If magic available and not explicitly disabled, use it to help out
      if kwargs['use_magic'] and kwargs['has_magic']: 
          response['Content-Type'] = get_mime(os.path.join(kwargs['doc_root'], 
                                              filename))
      return response
  