File download issues

Server/src/routes/api/sermons.js

@@ -64,7 +64,12 @@ router.get("/download/:id",function(req,res){
             return;
         }
         var file = finalStorage + sermon.file;
-        res.download(file);
+        if (fs.existsSync(file)){
+            res.download(file);
+        } else {
+            res.status(404).json({"status":404,"message":"Could not find the file associated with this sermon"});
+        }
+        
     });
 });