docs: def upload_progress(request):
      """
      AJAX view adapted from django-progressbarupload
  
      Return the upload progress and total length values
      """
      if 'X-Progress-ID' in request.GET:
          progress_id = request.GET['X-Progress-ID']
      elif 'X-Progress-ID' in request.META:
          progress_id = request.META['X-Progress-ID']
      if 'logfilename' in request.GET:
          logfilename = request.GET['logfilename']
      elif 'logfilename' in request.META:
          logfilename = request.META['logfilename']
      cache_key = "%s_%s" % (request.META['REMOTE_ADDR'], progress_id)
      data = cache.get(cache_key)
      if not data:
          data = cache.get(logfilename.replace(' ','_'))
      return HttpResponse(json.dumps(data))