Why is "Chalkers" not printing to the console?

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

var commonHeaders = {'Content-Type': 'text/html'};

//Handle HTTP route GET / and POST / i.e. Home
function home(request, response){
  //if url == "/" && GET
  if request.url === "/"){
    if(request.method.toLowerCase() === "get"){
     //show search
     response.writeHead(200, commonHeaders);  
     renderer.view("header", {}, response);
     renderer.view("search", {}, response);
     renderer.view("footer", {}, response);
     response.end();
    } else {
    //if url == "/" && POST

    //get the post data from the body
    request.on("data", function(postBody){
    //extract the username
    var query = querystring.parse(postBody.toString());
    response.write(query.username);
    response.end();
    //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, commonHeaders);  
    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);
      response.end();
    });

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

  }
}

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