redirect to referer url when logout

src/server/routes/logout.js

@@ -1,8 +1,14 @@
+const { URL } = require('url');
+
 module.exports = function(crowi, app) {
   return {
     logout(req, res) {
       req.session.destroy();
-      return res.redirect('/');
+
+      // parse referer url
+      const referer = new URL(req.headers.referer);
+      // redirect
+      return res.redirect(`${referer.pathname}${referer.search}${referer.hash}`);
     },
   };
 };