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JavaScript Build a Simple Dynamic Site with Node.js Creating a Basic Template Engine in Node.js Binding Values

profile page does not load profile information.

profile file

var EventEmitter = require("events").EventEmitter;
var http = require("http");
var util = require("util");

 * An EventEmitter to get a Treehouse students profile.
 * @param username
 * @constructor
function Profile(username) {


    profileEmitter = this;

    //Connect to the API URL (http://teamtreehouse.com/username.json)
    var request = http.get("http://teamtreehouse.com/" + username + ".json", function(response) {
        var body = "";

        if (response.statusCode !== 200) {

            //Status Code Error
            profileEmitter.emit("error", new Error("There was an error getting the profile for " + username + ". (" + http.STATUS_CODES[response.statusCode] + ")"));

        //Read the data
        response.on('data', function (chunk) {
            body += chunk;
            profileEmitter.emit("data", chunk);

        response.on('end', function () {
            if(response.statusCode === 200) {
                try {
                    //Parse the data
                    var profile = JSON.parse(body);
                    profileEmitter.emit("end", profile);
                } catch (error) {
                    profileEmitter.emit("error", error);
        }).on("error", function(error){
            profileEmitter.emit("error", error);

util.inherits( Profile, EventEmitter );

module.exports = Profile;

rendere file:

var fs = require("fs");

function mergeValues(values, content) {
  //Cycle over the keys
  for(var key in values) {
    //Replace all {{key}} with the value from the values object

    content = content.replace("{{" + key + "}}", values[key]);
  //return merged content
  return content; 

function view(templateName, values, reponse) {
  //Read from the template file
  var fileContents = fs.readFileSync('./views/' + templateName + '.html', {encoding: "utf8"});
  //Insert values in to the content
  fileContents = mergeValues(values, fileContents);
  //Write out the contents to the response

module.exports.view = view;

router file

var Profile = require("./profile.js");
var renderer = require("./renderer.js");

//Handle HTTP route GET / and POST / i.e. Home
function home(request, response) {
  //if url == "/" && GET
  if(request.url === "/") {
    //show search
    response.writeHead(200, {'Content-Type': 'text/plain'});  
    renderer.view("header", {}, response);
    renderer.view("search", {}, response);
    renderer.view("footer", {}, response);
  //if url == "/" && POST
    //redirect to /:username

//Handle HTTP route GET /:username i.e. /chalkers
function user(request, response) {
  //if url == "/...."
  var username = request.url.replace("/", "");
  if(username.length > 0) {
    response.writeHead(200, {'Content-Type': 'text/plain'});  
    renderer.view("header", {}, response);    

    //get json from Treehouse
    var studentProfile = new Profile(username);
    //on "end"
    studentProfile.on("end", function(profileJSON){
      //show profile

      //Store the values which we need
      var values = {
        avatarUrl: profileJSON.gravatar_url, 
        username: profileJSON.profile_name,
        badges: profileJSON.badges.length,
        javascriptPoints: profileJSON.points.JavaScript
      //Simple response
      renderer.view("profile", values, response);
      renderer.view("footer", {}, response);

    //on "error"
    studentProfile.on("error", function(error){
      //show error
      renderer.view("error", {errorMessage: error.message}, response);
      renderer.view("search", {}, response);
      renderer.view("footer", {}, response);


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

I have a console.log error in a workspace as follows:

treehouse:~/workspace$ node app.js
Server running at http://<workspace-url>/
throw er; // Unhandled 'error' event
Error: connect ETIMEDOUT
at exports._errnoException (util.js:746:11)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1010:19)


Hi Andrew Chalkley, I'v isolated the timeout to http.get at the following url: http://teamtreehouse.com/paulwagner.json

When i browse to it directly with my browser i have no problem getting to it. When i substitute http://google.com in that same http.get call it returns no problem. I suspect there maybe something blocking the communication between your app server and your api server.

3 Answers

Colin Stodd
Colin Stodd
6,257 Points


My page actually loads the error page and not the profile page. Im assuming its because Im getting a 404 error.

Colin Stodd
Colin Stodd
6,257 Points

But Paul to answer your question. You might have to add an "s" to any place where you have http://www.teamtreehouse.com"

var request = http.get("http://teamtreehouse.com/" + username + ".json", function(response) {
        var body = "";

Treehouse added the "s" security recently. Not sure why they haven't upgraded the videos to reflect this.

Wilson Usman
Wilson Usman
35,206 Points

Adding the s to http doesn't solve my problem. I really wish we could find the solution to this... :/

I also want to point out that I'm using the project download files. Even the last folder won't work, all it executes is the username back without any styling.

Colin Stodd
Colin Stodd
6,257 Points

Sorry I can't find how to edit my posts; but I meant (above) the "s" as in "http(s)", so anywhere http://www.teamtreehouse.com is included in your code, you need to change it to https://www.teamtreehouse.com