nginx byte request on proxied file

gistfile1.txt

        server {
           listen       *:80;

                location = /crossdomain.xml {
                        root /var/www/html/;
                }

                location = /test.html {
                        root /var/www/html/;
                }

                location / {
                        root                 /data/www;
                        error_page           404 = /fetch$uri;
                }

                location /fetch {
                        internal;
                        proxy_pass           http://127.0.0.1:50000;
                        proxy_store          on;
                        proxy_store_access   user:rw  group:rw  all:r;
                        proxy_temp_path      /data/temp;
                        alias                /data/www;
                }

                location /test {
                        bytes on;
                        if ($http_range) {
                                set  $args  $http_range;
                        }
                        rewrite /test/(.+)$     /$1 break;
                        proxy_pass http://127.0.0.1:50000;
                }

                location /m {
                        #bytes on;
                        rewrite /m/(.+)$        /$1 break;
                        proxy_pass http://127.0.0.1:50000;
                }

        }

nginx byte range on proxy request

# using: ngx_http_bytes_filter_module

                location / {
                        bytes on;
                        if ($http_range) {
                                set  $args  $http_range;
                        }
                        proxy_pass http://127.0.0.1:50000;
                }