Download large file with node.js avoiding high memory consumption

Question

I`m trying to create a file downloader as a background service but when a large file is scheduled, it\'s first put in memory and then, at the end of the download the file is

Answer 1

When downloading large file please use fs.write and not writeFile as it will override the previous content.

function downloadfile(res) {
    var requestserver = http.request(options, function(r) {
        console.log('STATUS: ' + r.statusCode);
        console.log('HEADERS: ' + JSON.stringify(r.headers));

        var fd = fs.openSync('sai.tar.gz', 'w');

        r.on('data', function (chunk) {
            size += chunk.length;
            console.log(size+'bytes received');
            sendstatus(res,size);
            fs.write(fd, chunk, 0, chunk.length, null, function(er, written) {
            });
        });
        r.on('end',function(){
            console.log('\nended from server');
            fs.closeSync(fd);
            sendendstatus(res);
        });
    });
}