SailsJS: Ajax Image Upload

gistfile1.js

//Source: https://github.com/balderdashy/sails/issues/27

var UUIDGenerator = require('node-uuid');

var DirectoryController = {
    // uploads a file to a directory
    upload: function(req, res) {

        // Parse form data from server
        var parsedFormData = JSON.parse(req.param('data'));

        // Iterate through each uploaded file
        var resultSet= [];
        async.forEach(req.files.files,function(file,cb) {
            async.auto({
                // Calculate new path and filename, using a UUID and the old extension
                metadata: function(cb){
                    var uuid = UUIDGenerator.v1(),
                        newFileName= uuid + "." + _.str.fileExtension(file.name),
                        newPath= config.appPath+"/public/files/"+newFileName;
                    cb(null,{
                        uuid: uuid,
                        newFileName: newFileName,
                        newPath: newPath
                    });
                },
                // Read temp file
                readFile: function(cb,r){   
                    console.log(file.path);
                    fs.readFile(file.path,cb);
                },
                // Save File to database
                saveToDb: ['metadata',function(cb,r){
                    File.create({
                        name: file.name,
                        size: file.size,
                        fsName: r.metadata.newFileName
                    }).success(function(f) {
                        // Move file into target directory, inheriting permissions
                        f.mv(parsedFormData.parent.id,cb);
                    });
                }],
                // Write file to destination
                writeFile: ['readFile','metadata',function(cb,r){
                        console.log("writing to",r.metadata.newPath);
                        console.log("file data",r.readFile,r.metadata);
                    fs.writeFile(r.metadata.newPath,r.readFile,cb);
                }]
            },function(err,res){
                resultSet.push({
                    id: res.saveToDb.id,
                    name: res.saveToDb.name,
                    size: res.saveToDb.size,
                    DirectoryId: parsedFormData.parent.id
                })              
                cb(err,res);
            });
        },
        // And respond
        function(err) {

            // Respond to client with success or failure
            if (err) { res.json({success:false, error: err}); }
            else { res.json({   success: true}); }
        });

    },
...
}