gistfile1.txt

function _download() {
            return new Promise(function (resolve, reject) {
                debug("download", image.url);

                var tmpName = tmp.tmpNameSync();
                var writable = fs.createWriteStream(tmpName);

                var streamSource = request(image.url);

                streamSource
                    .on("response", function (res) {
                        debug("download ended", res.statusCode);
                    })
                    .on("end", function () {
                        resolve(fs.createReadStream(tmpName));
                    })
                    .on("error", function (err) {
                        debug("download error", err);
                    })
                    .pipe(writable)
                ;

            });
        }