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

Question

I am trying to figure out how I can post an image directly to GridFS without storing it anywhere on the server as a temporary file first.

I am using Postman (chrome

Answer 1

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.