Use createReadStream to send the requested part to the client. The function call createReadStream() will give you a readable stream.
Example
The following is the code −
stream = fs.createReadStream(path); stream.on('open', function () { res.writeHead(206,{ "Content-Range":"bytes " + begin + "-" + end + "/" +total, "Accept-Ranges":"bytes", "Content-Length":chunksize, "Content-Type":"new/mp4" }); stream.pipe(res); });