default.py 文件源码

def serve(self, request, file_obj, **kwargs):
        fullpath = file_obj.path
        # the following code is largely borrowed from `django.views.static.serve`
        # and django-filetransfers: filetransfers.backends.default
        if not os.path.exists(fullpath):
            raise Http404('"%s" does not exist' % fullpath)
        # Respect the If-Modified-Since header.
        statobj = os.stat(fullpath)

        content_type_key = 'mimetype' if LTE_DJANGO_1_4 else 'content_type'
        response_params = {content_type_key: self.get_mimetype(fullpath)}
        if not was_modified_since(request.META.get('HTTP_IF_MODIFIED_SINCE'),
                                  statobj[stat.ST_MTIME], statobj[stat.ST_SIZE]):
            return HttpResponseNotModified(**response_params)
        response = HttpResponse(open(fullpath, 'rb').read(), **response_params)
        response["Last-Modified"] = http_date(statobj[stat.ST_MTIME])
        self.default_headers(request=request, response=response, file_obj=file_obj, **kwargs)
        return response