I'm having a problem with Getting the Response Body.

Hi Cindy,

You didn't give a link to the "Getting the Response Body" challenge.

I'm guessing it's:

http://teamtreehouse.com/library/nodejs-basics/building-a-command-line-application/getting-the-response-body-2

..where the challenge says:

Challenge Task 1 of 2

Without renaming any of the variables, modify the data callback to concatenate the stream of data to the responseBody.

If you look at the video (and download the zip files for the project), you'll see code like this:

function get(username){
  //Connect to the API URL (https://teamtreehouse.com/username.json)
  var request = http.get("http://teamtreehouse.com/" + username + ".json", function(response){
    var body = "";
    //Read the data
    response.on('data', function (chunk) {
      body += chunk;
    });
    response.on('end', function(){

This should give you some idea of the type of code the challenge is looking for..

So the specific code given at the start of the challenge

(and remember the challenge says NOT to change the names of the variables given in the code) is:

var http = require("http");
var request = http.get("http://teamtreehouse.com/chalkers.json", function(response){
    var responseBody = "";

    response.on("data", function(dataChunk) {

    });

    response.on("", function(){
        console.log(responseBody);
    });

});

request.on("error", function(error){
    console.error(error.message);
});

First thing you might notice is that, just to trick you (or get you to think),

they've changed the var (variable) named 'body' (that's used in the videos)

to the var 'responseBody' on this line:

var responseBody = "";

...and (just to really mess with your head) on the they've changed

the response call back line:

response.on("data", function(dataChunk) {

Notice: 'chunk' has been changed to 'dataChunk'.

However the code templating (pattern) is basically intact (nearly the same).

Now on to the tricky concatenation part.

If you want to do it the 'hardcore' javascript way,

use the standard javascript convention '+=' to concatenate

dataChunk on to the var defined empty string responseBody

with a line like:

responseBody += dataChunk;

Or (the other way which is easier for me to understand)

is just to use the plus sign (+) like so:

responseBody = responseBody + dataChunk;

To make the full code look like this:

var http = require("http");
var request = http.get("http://teamtreehouse.com/chalkers.json", function(response){
    var responseBody = "";

    response.on("data", function(dataChunk) {
      //This code line should work:   responseBody += dataChunk;

      //but I also passed with the line below:
      responseBody = responseBody + dataChunk;
    });

    response.on("", function(){
        console.log(responseBody);
    });

});

request.on("error", function(error){
    console.error(error.message);
});

..and lo and behold, with such code the Treehouse answer engine should like you..

(i.e. you pass part 1 of 2 for the challenge!)

Hopefully these "thoughts" was what you were looking for (appreciated)..

..and I should add that the second part of the challenge:

Challenge Task 2 of 2

See the console.log(responseBody); in that callback around line 10? Fix the listener so that the callback gets executed when the response has fully finished.

Is easy by comparison. This line:

response.on("", function(){

...just needs to be changed to:

response.on("end", function(){

Don't get confused by the substitution of double quotes for single quotes..I guess they are interchangeable in javascript.

/*Here the whole code for Challenge task 1 of 2 */

var https = require("https"); var request = https.get("https://teamtreehouse.com/chalkers.json", function(response){ var responseBody = "";

response.on("data", function(dataChunk) {
  //This code line should work:   responseBody += dataChunk;

  //but I also passed with the line below:
  responseBody = responseBody + dataChunk;
});

response.on("end", function(){
    console.log(responseBody);
});

});

request.on("error", function(error){ console.error(error.message); });

Thanks great input :)

Thanks great input :)

var http = require("http"); var request = http.get("http://teamtreehouse.com/chalkers.json", function(response){ var responseBody = "";

     response.on("data", function(dataChunk) {

       responseBody = responseBody + dataChunk;
     });

response.on("end", function(){
    console.log(responseBody);
});

});

request.on("error", function(error){ console.error(error.message); });

The solution is simpler than i thought it would be. I tried so many things and i was starting to go into a rabbit hole. so they want you to add

responseBody += dataChunk;

so your code should look like this..

const https = require("https");
const request = https.get("https://teamtreehouse.com/chalkers.json", response => {
    let responseBody = "";

    response.on("data", dataChunk => {
        responseBody += dataChunk;
    });

    response.on("", () => {
        console.log(responseBody);
    });

});

request.on("error", error => {
    console.error(error.message);
});

const https = require("https"); const request = https.get("https://teamtreehouse.com/chalkers.json", response => { var responseBody = "";

response.on("data", function(dataChunk) { responseBody = responseBody + dataChunk; });

response.on("",  function() {
    console.log(responseBody);
});

});

request.on("error", function(error) { console.error(error.message); });

the above code passes

worst course on treehouse ..disappoint........;(