Error return value, Nodejs, JWT - node.js

Question

function isTokened(data) {
var token = data;
if(token != null || token != undefined){
jwt.verify(token, app.get('userToken'), function(err, decoded) {
return {
"user": decoded._doc.name,
"href": "/salir",
"text": "Salir"
};
});
}else{
return {
href: "/entrar",
text: "Entrar"
};
}
}
TypeError: c:\Users\Hector\Desktop\Proyecto\views\index.jade:81
79| li 80|
a.text(href='/acerca') Acerca
81| if au.user 82| li 83| a.text(href="/area") #{au.user} 84|
li
Cannot read property 'user' of undefined at eval (eval at
(c:\Users\Hector\Desktop\Proyecto\node_modules\jade\lib\index.js:218:8),
:354:8) at eval (eval at
(c:\Users\Hector\Desktop\Proyecto\node_modules\jade\lib\index.js:218:8),
:453:22) at exports.compile.res
(c:\Users\Hector\Desktop\Proyecto\node_modules\jade\lib\index.js:219:38)
at Object.exports.renderFile
(c:\Users\Hector\Desktop\Proyecto\node_modules\jade\lib\index.js:380:38)
at Object.exports.renderFile
(c:\Users\Hector\Desktop\Proyecto\node_modules\jade\lib\index.js:370:21)
at View.exports.__express [as engine]
(c:\Users\Hector\Desktop\Proyecto\node_modules\jade\lib\index.js:417:11)
at View.render
(c:\Users\Hector\Desktop\Proyecto\node_modules\express\lib\view.js:126:8)
at tryRender
(c:\Users\Hector\Desktop\Proyecto\node_modules\express\lib\application.js:639:10)
at EventEmitter.render
(c:\Users\Hector\Desktop\Proyecto\node_modules\express\lib\application.js:591:3)
at ServerResponse.render
(c:\Users\Hector\Desktop\Proyecto\node_modules\express\lib\response.js:961:7)
at c:\Users\Hector\Desktop\Proyecto\app.js:167:6 at Layer.handle
[as handle_request]
(c:\Users\Hector\Desktop\Proyecto\node_modules\express\lib\router\layer.js:95:5)
at next
(c:\Users\Hector\Desktop\Proyecto\node_modules\express\lib\router\route.js:131:13)
at Route.dispatch
(c:\Users\Hector\Desktop\Proyecto\node_modules\express\lib\router\route.js:112:3)
at Layer.handle [as handle_request]
(c:\Users\Hector\Desktop\Proyecto\node_modules\express\lib\router\layer.js:95:5)
at
c:\Users\Hector\Desktop\Proyecto\node_modules\express\lib\router\index.js:277:22

Answer 1

jwt.verify is not a sync function so your function ends up exiting without returning anything. You need to use callback approach to get verify result. You want something like this:
function isTokened(data, callback) {
if(data){
jwt.verify(data, app.get('userToken'), function(err, decoded) {
callback && callback({
"user": decoded._doc.name,
"href": "/salir",
"text": "Salir"
});
});
}else{
callback && callback({
href: "/entrar",
text: "Entrar"
});
}
}
You will probably want to do some error handling in case jwt.verify returns an error or decoded does not contain required fields.