httpRequest.js

var querystring = require('querystring')
         	,	http = require('http');

			var data = querystring.stringify({
			      username: 'yourUsernameValue',
			    });

			var options = {
			    host: 'http://localhost',
			    port: 3000,
			    path: '/api/product',
			    method: 'POST',
			    headers: {
			        'Content-Type': 'application/x-www-form-urlencoded',
			        'Content-Length': Buffer.byteLength(data)
			    }
			};

			var req = http.request(options, function(res) {
			    res.setEncoding('utf8');
			    res.on('data', function (chunk) {
			        console.log("body: " + chunk);
			    });
			});

			console.log(req);

			req.write(data);
			req.end();