app.get("/files/:id", async function (req, res) {

    let id = req.params.id;

    if(id) {

        //Allow file extensions for better iOS support

        id = id.split(".");
        id = new ObjectId(id[0]);

        let readStream = null;
        let timeoutTimer = setTimeout(() => {
            if(readStream) {
                readStream.destroy();
                console.log(`Forced closing stream: ${id}`);
            }
        },120000);

        const docs = await gfs.find({_id: id}).toArray();

        if (docs.length) {

            const file = docs[0];


            res.setHeader("Content-Type", file.contentType);
            res.setHeader("Accept-Ranges", "bytes");


            let range = req.headers.range;

            if (range) {
                let parts = range.replace(/bytes=/, "").split("-");
                let partialstart = parts[0];
                let partialend = parts[1];

                let total = file.length;
                let start = parseInt(partialstart, 10);
                let end = partialend ? parseInt(partialend, 10) : total - 1;
                let chunksize = (end - start) + 1;


                res.status(206);
                res.setHeader("Content-Range", "bytes " + start + "-" + end + "/" + total);
                res.setHeader("Content-Length", chunksize);

                readStream = gfs.openDownloadStream(id, {start, end: total});


            } else {
                res.setHeader("Content-Length", file.length);

                readStream = gfs.openDownloadStream(id);
            }

            readStream.on("close",() => {
                clearTimeout(timeoutTimer);
            });

            readStream.on("error",(e) => {
                console.error(e);
            });

            // Sending file
            return readStream.pipe(res);


        }

    }

    return res.redirect("https://www.skibbel.com/");

});