13_http_json_api_server.js

/*
12 - Write an HTTP server that serves JSON data when it receives a GET request to the path '/api/parsetime'. Expect the request to contain a query string with a key 'iso' and an ISO-format time as the value.

  For example:

  /api/parsetime?iso=2013-08-10T12:10:15.474Z

  The JSON response should contain only 'hour', 'minute' and 'second'
  properties. For example:

     {
       "hour": 14,
       "minute": 23,
       "second": 15
     }

  Add second endpoint for the path '/api/unixtime' which accepts the same query string but returns UNIX epoch time in milliseconds (the number of milliseconds since 1 Jan 1970 00:00:00 UTC) under the property 'unixtime'.

  For example:

     { "unixtime": 1376136615474 }

  Your server should listen on the port provided by the first argument to your program.
 */

var http = require('http');
var url = require('url');
var port = process.argv[2];

var server = http.createServer(function (request, response) {
    if (request.method=='GET') {
        response.writeHead(200, {'Content-Type': 'application/json'});
        var parsedReq = url.parse(request.url, true);
        var date = new Date(parsedReq.query['iso']);
        if (parsedReq.pathname == "/api/parsetime") {
            date = '{"hour":'+ date.getHours() +',"minute":'+ date.getMinutes() +',"second":'+ date.getSeconds() +'}';
        } else if (parsedReq.pathname == "/api/unixtime") {
            //                                      vvvvvvvvvvvv necessary to get milliseconds.
            date = '{"unixtime":'+ Date.parse(date.toISOString()) +'}';
        }
        response.end(date);
    }
});
server.listen(port);