Node - Cannot find audio stream

Question

I created a simple server that uses the fs module to stream an mp3 file to a browser that plays it in the html5 sound element. Be that as it may, the audio streams work fine, however I cannot search through the stream, even if the part that I am referring to is already buffered.

var express = require('express');
var app = express();
var fs = require('fs');

app.get('/', function (req, res) {
    var filePath = 'music.mp3';
    var stat = fs.statSync(filePath);

    res.writeHead(200, {
        'Content-Type': 'audio/mpeg',
        'Content-Length': stat.size,
    });

    var readStream = fs.createReadStream(filePath);
    readStream.pipe(res);
});

Other similar questions & As suggested to add the Content-Range header, but I can not find a simple example of how to do this. Others say they use the 206 Partial-Content header, but when I do this, the sound will not play at all.

Here is a demo (testing on Chrome on Windows)

Answer 1

:

var express = require('express'),
    fs = require('fs'),
    app = express()

app.get('/', function (req, res) {
    var filePath = 'music.mp3';
    var stat = fs.statSync(filePath);
    var total = stat.size;
    if (req.headers.range) {
        var range = req.headers.range;
        var parts = range.replace(/bytes=/, "").split("-");
        var partialstart = parts[0];
        var partialend = parts[1];

        var start = parseInt(partialstart, 10);
        var end = partialend ? parseInt(partialend, 10) : total-1;
        var chunksize = (end-start)+1;
        var readStream = fs.createReadStream(filePath, {start: start, end: end});
        res.writeHead(206, {
            'Content-Range': 'bytes ' + start + '-' + end + '/' + total,
            'Accept-Ranges': 'bytes', 'Content-Length': chunksize,
            'Content-Type': 'video/mp4'
        });
        readStream.pipe(res);
     } else {
        res.writeHead(200, { 'Content-Length': total, 'Content-Type': 'audio/mpeg' });
        fs.createReadStream(filePath).pipe(res);
     }
});