Storing data stream from POST request in GridFS, express, mongoDB, node.js

gridfs-stream makes that pretty easy:

// `gfs` is a gridfs-stream instanceapp.post('/picture', function(req, res) {  req.pipe(gfs.createWriteStream({    filename: 'test'  }));  res.send("Success!");});

while @robertklep's answer is correct, I would like to add something to his answer. This code shows how you can send back the stored file's metadata.

app.post('/picture', function(req, res) {  req.pipe(gfs.createWriteStream({    filename: 'test'  }).on('close', function(savedFile){    console.log('file saved', savedFile);    return res.json({file: savedFile});  }));})  

This worked for me with mongoose:

 var gfs = Grid(mongoose.connection.db, mongoose.mongo);    var writeStream = gfs.createWriteStream({        filename: name,        mode: 'w',        content_type: 'video/mp4'    });    writeStream.on('close', function() {        console.log('close event');    });    fs.createReadStream('uploads/' + name + '/' + name + '.mp4').pipe(writeStream);    console.log('stream.write: ' + name + '/' + name + '.mp4');

I am struggling a couple of days with getting the video on client side browser. That is what I tried so far:

var readstream = gfs.createReadStream({        filename: file.filename    });    readstream.on('data', function(data) {        res.write(data);        console.log(data);    });    readstream.on('end', function() {        res.end();            });    readstream.on('error', function (err) {        console.log('An error occurred!', err);        throw err;    });

My Data on MongoDB side looks like:

db.fs.chunks.find() { "_id" : ObjectId("5757e76df14741bf0391aaca"), "files_id" : ObjectId("5757e76df14741bf0391aac8"), "n" : 0, "data" : BinData(0,"AAAAIGZ0eXBpc29....

And the contentType is 'video/mp4':

logging on browser side prints this:

Object { 0: "�", 1: "�", 2: "�", 3: " ", 4: "f", 5: "t", 6: "y", 7: "p", 8: "i", 9: "s", 85003 more… }

Could someone please save my live? I hope you do not see my post as not convenient in this place.