streams.js

function setFileStream(stream) {
            stream.dataHandler = null;
            stream.fileName = null;
            stream.currentData = null;

            stream.on('data', function (data) {
                if (data.type == "start") {
                    stream.fileName = data.file;
                    stream.dataHandler = function (data) {
                        if (stream.currentData === null) {
                            stream.currentData = data;
                        } else {
                            stream.currentData += data;
                        }
                    };

                    return;
                }
                if (data.type == "end") {
                    var buffer = new Buffer(stream.currentData, 'binary');
                    fs.writeFile(stream.fileName, buffer);

                    stream.dataHandler = null;
                    stream.fileName = null;
                    stream.currentData = null;

                    return;
                }


                if (stream.dataHandler !== null) {
                    stream.dataHandler(data);
                }
            });
        }