angularjs - NodeJs middleware set header -

i add add refresh token header in middleware seen in first answer of question: implementing refresh-tokens angular , express-jwt

backend - middleware:

jwt.verify(token, config.secret, function(err, decoded) {         if (err) {             res.status(401);             return res.json({ success: false, message: 'authentication failed' });         } else {             var token_exp = new date(decoded.exp * 1000);             var date = new date();             var difference = (token_exp.gettime() - date.gettime()) / 60000;              if(difference < (config.expiretimetoken / 2 )){                 var expires = config.expiretimetoken + 'm';                 var token = jwt.refreshtoken(decoded);                  res.setheader('authorization', 'bearer ' + token);                 next();             }else{                 req.decoded = decoded;                 next();             }         }     }); 

front-end interceptor:

module.exports = function ($injector) {     return {         request: function (config) {              var coreservice = $injector.get('coreservice');              config.headers['x-access-token'] = coreservice.gettoken();             return config;         },          response: function(response) {             var receivedtoken = response.headers('authorization');             console.log(receivedtoken);             return response;         }     }; }; 

however, whenever set header not received interceptor on client side. when debug res.header in npm console, set header 'authorization' in '_headers' instead of 'headers'.

how can solve this.

in express middleware, can set header using res.set(field, [value]) or res.header(field, [value]) (alias same function). setheader not express method, native node.js, assume might causing problem.