Updated to add headers to prevent search engine crawl some unnecessary paths

Author: jackycute

lib/response.js

@@ -334,7 +334,8 @@ function actionDownload(req, res, noteId) {
             'Content-Type': 'text/markdown; charset=UTF-8',
             'Cache-Control': 'private',
             'Content-disposition': 'attachment; filename=' + filename + '.md',
-            'Content-Length': body.length
+            'Content-Length': body.length,
+            'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
         });
         res.end(body);
     });
@@ -367,6 +368,7 @@ function actionPDF(req, res, noteId) {
             res.setHeader('Content-disposition', 'attachment; filename="' + filename + '.pdf"');
             res.setHeader('Cache-Control', 'private');
             res.setHeader('Content-Type', 'application/pdf; charset=UTF-8');
+            res.setHeader('X-Robots-Tag', 'noindex, nofollow'); // prevent crawling
             stream.pipe(res);
             fs.unlink(path);
         });