NodeJS MongoDB-GridFS Video range stream example Lets your browser seek/jump wihin the video-playback.

GridStream.js

var app = require('express')();
var GridStore = require('mongodb').GridStore;
var ObjectID = require('mongodb').ObjectID;
var MongoClient = require('mongodb').MongoClient;
var Server = require('mongodb').Server;

var dbConnection;
MongoClient.connect("mongodb://localhost:27017/ersatz?auto_reconnect", {journal: true}, function(err, db) {
  dbConnection = db;
  app.listen(3000);
});

function StreamGridFile(req, res, GridFile) {
  if(req.headers['range']) {

    // Range request, partialle stream the file
    console.log('Range Reuqest');
    var parts = req.headers['range'].replace(/bytes=/, "").split("-");
    var partialstart = parts[0];
    var partialend = parts[1];

    var start = parseInt(partialstart, 10);
    var end = partialend ? parseInt(partialend, 10) : GridFile.length -1;
    var chunksize = (end-start)+1;

    console.log('Range ',start,'-',end);

    res.writeHead(206, {
      'Content-Range': 'bytes ' + start + '-' + end + '/' + GridFile.length,
      'Accept-Ranges': 'bytes',
      'Content-Length': chunksize,
      'Content-Type': GridFile.contentType
    });

    // Set filepointer
    GridFile.seek(start, function() {
      // get GridFile stream
      var stream = GridFile.stream(true);

      // write to response
      stream.on('data', function(buff) {
        // count data to abort streaming if range-end is reached
        // perhaps theres a better way?
        start += buff.length;
        if(start >= end) {
          // enough data send, abort
          GridFile.close();
          res.end();
        } else {
          res.write(buff);
        }
      });
    });

  } else {

    // stream back whole file
    console.log('No Range Request');
    res.header('Content-Type', GridFile.contentType);
    res.header('Content-Length', GridFile.length);
    var stream = GridFile.stream(true);
    stream.pipe(res);
  }
}

app.get('/', function(req, res) {
  console.log('GET request');
  new GridStore(dbConnection, new ObjectID("526652540d9e077978000230"), null, 'r').open(function(err, GridFile) {
    if(!GridFile) {
      res.send(404,'Not Found');
      return;
    }
    
    StreamGridFile(req, res, GridFile)
  });
});

Hey, I've just found your example here! Great work and thanks, but with the same example, I get a net::ERR_CONTENT_LENGTH_MISMATCH error.

Does the chunksize in the code here relate to to the chunksize in my GridFS?

Your Code works well with IE11, FF and Chrome, but for some reasons Safari refuses to play my BigBuckBunny video (MOV/H.264) delivered through GridFS

For some reason, I can not edit / delete previous posts (sorry for spamming):

With a little change, your example works fine in Safari:

https://gist.github.com/derMani/218bd18cc926d85a57a1

to steam only a part of the file do fs.createReadStream('sample.txt', {start: 90, end: 99});

ah, but i have no idea if GridStream has support for that...

Streaming videos directly to/from GridFS using gridfs-stream either with mongodb-native db instance or mongoose.

Clone node-cheat direct_upload_gridfs, run node app followed by npm install express mongodb gridfs-stream.

Specific not work "start" FILE FOR VIDEO
I have 70 gigabytes of video and I'll extract a fragment of a size of 10 megabytes
Example:

1. fs.createReadStream('sample.txt', {start: 50 000 000, end: 60 000 000})
   2.res.writeHead(206, {
   'Content-disposition': 'filename=streamxx.mp4',
   'Accept-Ranges': 'bytes',
   'Content-Type': "video/mp4",
   'Content-Range': 'bytes ' + start + '-' + end + '/' + GridFile.length,//GridFile.length, // start = 50 000 000
   'Content-Length': chunksize
   });
2. GridFile.seek(start, function () { // start = 50 000 000
   or Other

These examples can extract part of the video file, but can not play in this part of the HTML5 Video tag . I tried FFMPEG and its superstructure but still can not play. As this fragmetn play or what or how to modify it ??

This is a grate help for me on my projects. Thanks you.