def Download(request):
  def readFile(fn, buf_size=262144):
    f = open(fn, "rb")
    while True:
      c = f.read(buf_size)
      if c:
        yield c
      else:
        break
    f.close()
  filename = '/usr/local/1.jpg'
  try:
    response = HttpResponse(readFile(file),mimetype='application/octet-stream')
    response['Content-Disposition'] = 'attachment; filename=%s' %'附件'
  except:
    response = HttpResponse('')
  return response