bootstrap.js

var http = require('http');

var fs = require('fs');

var url = require('url');

var querystring = require('querystring');

var waveformData = require('./library/waveformData');

var marked = require('marked');

var serverPort = process.env.PORT || 35000;
var serverIp = process.env.HOSTNAME || '127.0.0.1';

/**
 * 
 * create a new nodejs server handle incoming requests
 * 
 * @param {type} request
 * @param {type} response
 */
var server = http.createServer(function (request, response) {
    
    // parse the url
    var urlParts = url.parse(request.url);
    
    // check if its is the url of a javascript file
    if (urlParts.pathname.split('.').pop() === 'js') {
        
        // if the file exists send it to the client
        // not really secure but this is a prototype
        // TODO: filter the file request
        fs.readFile('client' + urlParts.pathname, function (error, fileContent) {
            
            if (!error) {
                
                // send the static file to the client
                response.writeHead(200, { 'Content-Type': 'application/javascript' });
                response.write(fileContent);
                response.end();
                
            } else {
                
                // the file was not on the server send a 404 page to the client
                response.writeHead(404, { 'Content-Type': 'text/html' });
                response.write('page not found');
                response.end();
                
            }

        });
        
    } else {
        
        // handle the "routes"
        switch (urlParts.pathname) {
            case '/':
                /*fs.readFile('client/index.html', function (error, html) {
                    
                    if (!error) {
                        
                        // send the main html page to the client
                        response.writeHead(200, { 'Content-Type': 'text/html' });
                        response.write(html);
                        response.end();
                        
                    } else {
                        
                        // the main page could not be found return a page not
                        // found message
                        response.writeHead(404, { 'Content-Type': 'text/html' });
                        response.write('page not found');
                        response.end();
                        
                    }
                        
                });*/

                fs.readFile('README.md', 'utf-8', function (error, document) {
                    
                    if (!error) {
                        
                        // send the main html page to the client
                        response.writeHead(200, { 'Content-Type': 'text/html' });
                        response.write(marked(document));
                        response.end();
                        
                    } else {
                        
                        // the main page could not be found return a page not
                        // found message
                        response.writeHead(404, { 'Content-Type': 'text/html' });
                        response.write('page not found');
                        response.end();
                        
                    }
                        
                });

                break;
            case '/getwavedata':
                
                var queryObject = querystring.parse(urlParts.query);
                
                if (typeof queryObject !== 'undefined') {
                    
                    waveformData.getRemoteWaveData(queryObject, function (error, peaks) {
                        
                        if (!error) {
                            
                            // success, send the track peaks to the client
                            response.writeHead(200, { 'Content-Type': 'application/json' });
                            response.write('{ "peaks": ' + JSON.stringify(peaks) + ' }');
                            response.end();
                            
                        } else {
                            
                            // fail, send the error to the client
                            response.writeHead(500, { 'Content-Type': 'application/json' });
                            response.write('{ error: ' + error + ' }');
                            response.end();
                            
                        }
                        
                    });
                    
                }
                
                break;
            case '/getTrack':
                
                var queryObject = querystring.parse(urlParts.query);
                
                //console.log(queryObject);
                
                if (typeof queryObject !== 'undefined' && queryObject.trackId !== 'undefined' && queryObject.trackFormat !== 'undefined') {
                    
                    var trackName = queryObject.trackId + '.' + queryObject.trackFormat;
                    
                    if (queryObject.serverDirectory === undefined) {
                        
                        queryObject.serverDirectory = './downloads';

                    }
                    
                    var trackPath = queryObject.serverDirectory + '/' + trackName;
                    
                    var fileStat = fs.statSync(trackPath);
                    
                    var mimeType;
                    
                    switch (queryObject.trackFormat) {
                        case 'ogg':
                            mimeType = 'audio/ogg';
                            break;
                        case 'mp3':
                            mimeType = 'audio/mpeg';
                            break;
                    }
                    
                    response.writeHead(200, { 'Content-Type': mimeType, 'Content-Length': fileStat.size });
                    
                    var readStream = fs.createReadStream(trackPath);
                    
                    readStream.pipe(response);
                    
                }
                
                break;
            default:
                response.writeHead(404, { 'Content-Type': 'text/html' });
                response.write('page not found');
                response.end();
                
        }
    }
    
});

server.listen(serverPort, serverIp, function () {

    console.log('server is listening, ip: ' + serverIp + ', port: ' + serverPort);

});