Getting a bad gateway response when attempting to run the app

Hey guys! I am attempting to run the app, but I am getting a bad gateway 502 error. Here's my code for router.js:

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() === "") { 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 body
request.on("data", function(postBody) {
  //extract the username
  var query = querystring.parse(postBody.toString());
  //redirect to /:username
  response.writeHead(303, {"Location": "/" + query.username});
  response.end();
  console.log(postBody.toString());
});

}

}

//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,
    javascript: profileJSON.points.JavaScript
  }
  //Simple response
  renderer.view("profile", values, response); 
  renderer.view("footer", {}, response);
  response.end();
});
//on "error"
studentProfile.on("error", function(error){
  //show errror
  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;