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JavaScript Build a Simple Dynamic Site with Node.js HTTP Methods and Headers Redirection Headers in Node.js

Yongshuo Wang
Yongshuo Wang
5,500 Points
Posted by Yongshuo Wang
Yongshuo Wang
5,500 Points

NodeJS redirect not working

I following this tutorial, but when I try to redirect to user method. It does not work, the page stays in gray color. Here is my snapshot of workspace https://w.trhou.se/ga329edluc

function home(request, response){
  if (request.url === '/'){
    if (request.method.toLowerCase() === "get"){
      response.writeHead(200, {'Content-type':'text/html'});
      render.view('header',{}, response);
      render.view('search',{}, response);
      render.view('footer',{}, response);
      response.end();
    }else{
      request.on("data", function(postBody){
        var query = queryString.parse(postBody.toString());
        response.writeHead(303, {'Location': '/' + query.username });

        response.end();
      });
    }
  }
}
simhub
simhub
26,544 Points
simhub
simhub
26,544 Points

do you get an error message from the console?

Cernan Bernardo
Cernan Bernardo
17,437 Points

i am getting the same result. were you able to figure it out?

Cernan Bernardo
Cernan Bernardo
17,437 Points

simhub no error messages from the console.

Cernan Bernardo
Cernan Bernardo
17,437 Points

Here is a snapshot of my workspace for anyone that wants to try my code. It still isn't working . https://w.trhou.se/z0dm27fnzl

Yongshuo Wang
Yongshuo Wang
5,500 Points
Yongshuo Wang
Yongshuo Wang
5,500 Points

Cernan Bernardo There is a typo in your router.js user function, when you check the username's length, you need to use username.length rather than user.name.length.

3 Answers

simhub
simhub
26,544 Points
simhub
simhub
26,544 Points

i looked at your snapshot.

actually there is a console error message:

events.js:85 throw er; // Unhandled 'error' event ^ Error: write after end at ServerResponse.OutgoingMessage.write (_http_outgoing.js:413:15) ................. at Object.user (/....../router.js:34:10)

..................

i am not sure what it means. i can just surmise that somewhere in your router.js file 'a response object is being written to after already being closed.'

so in the router.js file you could try to modify the user function like this:

function user(request, response){ console.log("Inside user function");

var username = request.url.replace("/","");

//---> DON'T PUT IT HERE !!! response.writeHead(200, {'Content-type':'text/html'}); render.view('header',{}, response); //--->

if (username.length > 0){

//---> PUT IT HERE !!! response.writeHead(200, {'Content-type':'text/html'}); render.view('header',{}, response); //---> .....

..........

but like i say'd before i do not fully understand what this error message is trying to say so if you figure that out please tell me :)

Yongshuo Wang
Yongshuo Wang
5,500 Points
Yongshuo Wang
Yongshuo Wang
5,500 Points

From my console, I did not see any error, but following your suggestion, it works.

Jeff Ward
Jeff Ward
8,978 Points

Thank you, your comment helped me too. I had the same error.

Jeff Ward
Jeff Ward
8,978 Points

Thank you, your comment helped me too. I had the same error.

Shaila Bolishetty
Shaila Bolishetty
172 Points
Shaila Bolishetty
Shaila Bolishetty
172 Points

I have the same Issue people. Need help. I get an error "There was an error getting the profile for chalkers. (Moved Permanently)" when I access Localhost:3000/chalkers.

Here is the 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() === "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 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;

Brian van Vlymen
Brian van Vlymen
12,637 Points
Brian van Vlymen
Brian van Vlymen
12,637 Points

I dont get it...