add previous url

middleware/index.js

@@ -0,0 +1,19 @@
+const express = require('express');
+const router = express.Router();
+const glob = require('glob');
+
+glob(__dirname + "/**/*.js", {}, (er, data) => {
+    if (er) {
+        console.error(er);
+        process.exit(-1);
+    }
+    data
+        .filter(file => {
+            return !file.endsWith('index.js')
+        })
+        .forEach(file => {
+            require(file)(router);
+        });
+});
+
+module.exports = router;

middleware/session_back.js

@@ -0,0 +1,16 @@
+async function handler(req, res, next) {
+    // TODO:
+    // Log only non-automatical requests
+    // In other words, ignore requests like favicon.ico
+    if (!req.accepts('html') && !req.accepts('*')) {
+        next();
+        return;
+    }
+    req.session.prev = req.originalUrl;
+    req.session.save();
+    next();
+}
+
+module.exports = (router) => {
+    router.use(handler);
+}