An example of piping in output from an HTTP request into another function

pipe.js

var http = require('http');
var bl = require('bl');

// file path is from enviroment variable passed in through CLI
var urls = process.argv.slice(2);
var results = [];
var returned = 0;


function httpGet(index) {
    http.get(urls[index], function(response) {
        response.pipe(bl(function(err, data) {
            if (err) {
                console.error(err);
            }
            results[index] = data.toString();
            returned++;

            if (returned === 3) {
                results.forEach(function(each) {
                    console.log(each);
                });
            }
        })).on('error', function(err) {
            console.error("There was an error submitting the http request.");
        });
    });
}

for (var i = 0; i < urls.length; i++) {
    httpGet(i);
}