错误页面不缓存

@@ -9,6 +9,12 @@ exports.notFound = () => {
     return (req, res) => {
         res.status(404);
 
+        res.set({
+            'Cache-Control': 'no-cache',
+            Pragma: 'no-cache',
+            Expires: (new Date(1900, 0, 1, 0, 0, 0, 0)).toUTCString()
+        });
+
         if (req.xhr) {
             return res.json({
                 code: 404,
@@ -34,6 +40,12 @@ exports.notFound = () => {
  */
 exports.serverError = () => {
     return (err, req, res, next) => {
+        res.set({
+            'Cache-Control': 'no-cache',
+            Pragma: 'no-cache',
+            Expires: (new Date(1900, 0, 1, 0, 0, 0, 0)).toUTCString()
+        });
+
         logger.error(`error at path: ${req.url}`);
         logger.error(err);