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JavaScript Build a Simple Dynamic Site with Node.js Handling Routes in Node.js Populating User Information

Posted by Tegar Putra
Tegar Putra
5,820 Points

Why the badge and javascriptpoint is "Undefined" ?

i wondering why the badge and javascriptpoint is undefined ? anyone can help?

app.js

const http = require('http');
const router = require('./router.js');

//1. Create a web server
const server = http.createServer((req,res)=> {
    res.writeHead(200,{'Content-Type':'text/plain'});
    router.home(req,res);
    router.user(req,res);
})
server.listen(3000, '127.0.0.1', () => 
    console.log('Server is running.....'));

router.js

const Profile = require('./profile.js');

function home(req,res){
    if(req.url === '/' ){
        res.writeHead(200, {'Content-Type':'text/plain'});
        res.write('header\n');
        res.write('body\n');
        res.end('footer\n');
    }
}
//rute untuk mencari badges dan.. profil dari yg dicari
function user(req,res){
        //if url =='/...'
        let username = req.url.replace("/","");
        if(username.length > 0){
            res.writeHead(200, {'Content-Type':'text/plain'});
            res.write('header\n');
            //ambil json dari treehouse
            const studentProfile = new Profile(username);
            //on 'end'
            studentProfile.on("end", function(profileJSON){
                    //tampilkan profil
                    //simpan value yang dibutuhkan
                    const values = {
                        avatarUrl: profileJSON.gravatar_url,
                        username: profileJSON.profile_name,
                        badges: profileJSON.badges_length,
                        javascriptPoints: profileJSON.points_Javascript
                    }
                    res.write(values.username + ' memiliki ' + values.badges + ' dan ' + values.javascriptPoints + '\n');
                    res.end('footer');
                })

            //on 'error
            studentProfile.on("error", function(error){
                //show error
                res.write(error.message + "\n");
                res.end('Footer\n');
            })
        }
                //tampilkan error

}

module.exports.home = home; 
module.exports.user = user;

2 Answers

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

You have a few issues with parsing the response. You need the membership operator (period) instead of underscore when accessing a sub-property:

  • instead of profileJSON.badges_length, you probably want profileJSON.badges.length
  • instead of profileJSON.points_Javascript try profileJSON.points.JavaScript
Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

Tegar Putra — were you able to resolve the issue? You can mark a question solved by choosing a "best answer".
Happy coding!

Kevin Gates
Kevin Gates
15,053 Points
Kevin Gates
Kevin Gates
15,053 Points

What Steven said. Should be:

var values = {
        avatarUrl: profileJSON.gravatar_url,
        username: profileJSON.profile_name,
        badges: profileJSON.badges.length,
        javascriptPoints: profileJSON.points.JavaScript
      }