diff --git a/lib/www/server/lib/utils/index.js b/lib/www/server/lib/utils/index.js
index a040421..bae0fee 100644
--- a/lib/www/server/lib/utils/index.js
+++ b/lib/www/server/lib/utils/index.js
@@ -8,5 +8,6 @@ module.exports = {
 	removeNulls: require('./removeNulls'),
 	logicalPath: require('./logicalPath'),
 	ranges: require('./ranges'),
-	unique: require('./unique')
+	unique: require('./unique'),
+	setContentDisposition: require('./setContentDisposition')
 };
diff --git a/lib/www/server/lib/utils/setContentDisposition.js b/lib/www/server/lib/utils/setContentDisposition.js
new file mode 100644
index 0000000..811a9e1
--- /dev/null
+++ b/lib/www/server/lib/utils/setContentDisposition.js
@@ -0,0 +1,8 @@
+
+function setContentDisposition (req, res) {
+	if (req.query.filename) {
+		res.set("Content-Disposition", `attachment; filename="${req.query.filename}"`);
+	}
+}
+
+module.exports = setContentDisposition;