Store an image in redis

gistfile1.js

var fs          = require('fs'),
    querystring = require('querystring'),
		redis				= require('redis'),
		r 					= redis.createClient(),
		allowedTypes = {
  'text/javascript': 'js',
  'text/css':        'css',

  'image/png':       'png',
  'image/jpeg':      'jpg',
  'image/gif':       'gif',
  'text/plain':      'txt'
	},
	allowedExtensions = [],
	contentTypes      = {};

for (ct in allowedTypes) {
  allowedExtensions[allowedExtensions.length] = allowedTypes[ct];
  contentTypes[allowedTypes[ct]] = ct;
}
var validFile = new RegExp('^\/[a-z]+\/[0-9a-z\-]+\.('+allowedExtensions.join('|')+')$');

// Never let something run as root when it's not needed!
if (process.getuid() == 0) {
	process.setgid('www-data');
	process.setuid('www-data');
}

exports.actions = function(req, res, ss) {

	return {

		uploadImage: function(data) {
			data = data.split(';base64,');

			var type = data[0].substr(5); // strip the data:

			if (!allowedTypes[type]) {
				return;
			}

	    // Decode the base64 data to binary.
			data = new Buffer(data[1], 'base64').toString('binary');

	    // Get the number of files in the upload dir.
			fs.readdir('./client/static/uploads', function(err, files) {
				if(!err) {
		      // Create a new file with a number as name that is one higher then the current amount of files in the uploads directory.
					var name = './client/static/uploads/'+files.length+'.'+allowedTypes[type];
					var lastPath = files.length+'.'+allowedTypes[type];
					
					fs.writeFile(name, data, 'binary', function(err) {
						console.log(lastPath+' uploaded');

						ss.publish.all('uploadImage', lastPath);
						
						r.set( 'bezelRoom'+lastPath, data, function() {
							var msg = 'The photo has been saved at: /'+lastPath;
							console.log( msg );

							r.get( 'bezelRoom'+lastPath, function( err, data ) {
								if( !data ) {
									res.writeHead( 404 );
									res.write( "No such room" );
									res.end();
									return res(false);
								} else {
									console.log(data);
									//in here we should send the bezelRoom name back in the return cb
									return res(true); 
							}
							})						
						})
					})
				}
			})		
		}
	}
};