server.js

var http = require('http'), 
    fs = require('fs'), 
    url = require('url'),
    port = 8080;

/* Global variables */
var listingData, server;

var requestHandler = function(request, response) {
	var parsedUrl = url.parse(request.url);
	
	switch(parsedUrl.pathname.toLowerCase()){
		case "/listings":
			if (request.method === 'GET') {
				response.write(listingData);
				break;
			}
		default:
			response.statusCode = 404;
			response.write("Bad gateway error");
	}
	
	response.end();
	
	/*
	Your request handler should send listingData in the JSON format as a response if a GET request 
	is sent to the '/listings' path. Otherwise, it should send a 404 error. 
	
	HINT: Explore the request object and its properties 
	HINT: Explore the response object and its properties
	https://code.tutsplus.com/tutorials/http-the-protocol-every-web-developer-must-know-part-1--net-31177
	http://stackoverflow.com/questions/17251553/nodejs-request-object-documentation
	
	HINT: Explore how callback's work 
	http://www.theprojectspot.com/tutorial-post/nodejs-for-beginners-callbacks/4
	
	HINT: Explore the list of MIME Types
	https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Complete_list_of_MIME_types
	*/
};

fs.readFile('listings.json', 'utf8', function(err, data) {
	/*
	This callback function should save the data in the listingData variable, 
	then start the server. 
	
	HINT: Check out this resource on fs.readFile
	//https://nodejs.org/api/fs.html#fs_fs_readfile_path_options_callback
	
	HINT: Read up on JSON parsing Node.js
	*/
	
	//Check for errors
	
	if (err) throw err;
	
	//Save the sate in the listingData variable already defined
	
	listingData = data;
	
	//Creates the server
	server = http.createServer(requestHandler);
	server.listen(port, function() {
		console.log("server listening on: http://localhost:8080");
	});
});