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JavaScript Node.js Basics 2017 Handling Errors in Node Handling the Error Event in Node

Posted by mouhamadoudiouf
mouhamadoudiouf
14,915 Points

Need help on my Node.JS file

Hello, I am issuing some errors with my app.js file as it doesn't output any result when I launch it with the node command. I verified my code to make sure it matched with the teacher's code. Probably an error I am not noticing. Can anyone help me?

Here's my code: 

// Problem: We need a simple way to look at a user's badge count and JavaScript points

// Solution: Use Node.js to connect to Treehouse's API to get profile information to print out
//function to print message to console

//require the module
const https = require('https');

function printMessage(username, badgeCount, point){
 const message = `${username} has ${badgeCount} total badge(s) and ${point} points in JavaScript`;
  console.log(message);
}

function getProfile(username){
const request = https.get(`https://teamtreehouse.com/${username}.json`, response => {
  let body = "";
  response.on("data", data => {
    body += data.toString();
  });

response.on('end', () => {
            //parse the data
            const profile = JSON.parse(body);
             //print the data
  printMessage(username, profile.badges.length, profile.points.JavaScript);
        });

});

}

const users = process.argv.slice(1);

users.forEach(getProfile);

4 Answers

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points

I'm assuming you had back ticks where the font has changed in your post. Other than that I compared your code with the video workspace and it looks like this line is off:

const users = process.argv.slice(1);

should be

const users = process.argv.slice(2);

Full code is below:

const https = require('https');

function printMessage(username, badgeCount, point){
    const message = `${username} has ${badgeCount} total badge(s) and ${point}
 points in JavaScript`;
    console.log(message); 
}

function getProfile(username){
    const request = https.get(`https://teamtreehouse.com/${username}.json`,
 response => {
                          let body = "";
                          response.on("data", data => {
                              body += data.toString();
                          });

                          response.on('end', () => { //parse the data 
                              const profile = JSON.parse(body); 
                              //print the data
                              printMessage(username, profile.badges.length,
 profile.points.JavaScript);
                                         });

                       });

}

const users = process.argv.slice(2);
users.forEach(getProfile);
Antony .
Antony .
2,824 Points
Antony .
Antony .
2,824 Points

Hi, Mouhamadou Diouf

KRIS NIKOLAISEN is right. But you also misunderstood a part of the video wrong. It wants you to put your profile username in the node command line.

For e.g. If you right click on my name and click "Open link in new tab", it will direct you to my profile and it will show you my username on the url. It should look like this

https://teamtreehouse.com/antony
mouhamadoudiouf
mouhamadoudiouf
14,915 Points

Thanks for your answer. I understand now!

mouhamadoudiouf
mouhamadoudiouf
14,915 Points
mouhamadoudiouf
mouhamadoudiouf
14,915 Points

Thanks for you prompt answer! In fact, I used the back ticks in my code. I've tried with you code in my workspace with node.js and I am getting the same outpout: an error.

Here's what's thrown out:

treehouse:~/workspace$ node newapp.js Mouhamamadou Alena Dave
undefined:1
Not found
^

SyntaxError: Unexpected token N in JSON at position 0
at JSON.parse (<anonymous>)
at IncomingMessage.response.on (/home/treehouse/workspace/newapp.js:18:52)
at emitNone (events.js:111:20)
at IncomingMessage.emit (events.js:208:7)
at endReadableNT (_stream_readable.js:1064:12)
at _combinedTickCallback (internal/process/next_tick.js:139:11)
at process._tickCallback (internal/process/next_tick.js:181:9)
treehouse:~/workspace$

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points

Try:

node newapp.js mouhamadoudiouf

I tested it and it worked for me:

mouhamadoudiouf has 127 total badge(s) and 3756 points in JavaScript

mouhamadoudiouf
mouhamadoudiouf
14,915 Points

Yes right! The name I outputed doesn't exist in Treehouse, my bad. Everything is working now. Thanks!