When I type `somedomain.com/some_api_url?_var1=1` into a browser, the response is `{"1":"descriptive string"}`, where `1` is a numerical index variable whose value could range from `1` to `n`. And where "descriptive string" is some text that summarizes what the index represents. 

**How can I integrate the `JSON response` from the `somedomain.com/some_api_url?_var1=1` api url into the very simple `Node.js` and `Express.js` example below?** 

For testing purposes, the very simple `app.js` shown below returns "Hello World" when the user requests `http : // localhost : 3000` from their web browser. **What specific changes need to be made to the code below so that the web browser responds to the request with:** 

```
Index is: 1  
Description is:  descriptive string  

```

**instead of responding with "Hello World"?** 

Here is the current code for `app.js`: 

```
var express = require('express');
var http = require('http');
var app = express();

app.get('/', function (req, res) {
    res.send('Hello World!');
});

app.listen(3000, function () {
  console.log('Example app listening on port 3000!');
});

```

Here is my current attempt, which results in the console printing `Got a response: undefined`, and with the browser remaining hung up because nothing is returned to the browser as a `response`: 

```
var express = require('express');
var http = require('http');
var app = express();

app.get('/', function (req, res) {

    var url = 'somedomain.com/some_api_url?_var1=1';

    http.get(url, function(res){
        var body = '';

        res.on('data', function(chunk){
            body += chunk;
        });

        res.on('end', function(){
            var fbResponse = JSON.parse(body);
            console.log("Got a response: ", fbResponse.picture);
        });
    }).on('error', function(e){
          console.log("Got an error: ", e);
    });

});

app.listen(3000, function () {
  console.log('Example app listening on port 3000!');
});

```

The `get` example code was adapted from [the example at this link](https://stackoverflow.com/questions/11826384/calling-a-json-api-with-node-js#11826486).