HTTP range, streaming, music and audio

问题

I have a website which I use to stream audio files. Mainly, MP3 & OGG. Since few months, I handle myself (PHP) the steaming part (before it was apache2). First I do a normal 200 OK response with sliced binary response of my multimedia audio files (for memory allocation). It's working fine, but I got the Infinity duration on all my audio. According to this question, I have updated yesterday the streaming part.

And now, I have one of the strangest bug I could imagine. My refactor of code works really fine with MP3 but not with OGG... Images, or zip download also works with the class above, and they both work fine as before.

Here is my Stream class.

<?php
class Stream extends Response
{
    protected $filepath;
    protected $delete;
    protected $range = ['from' => 0, 'to' => null];

    public function __construct($filePath, $delete = false, $range = NULL)
    {
        $this->delete = $delete;
        $finfo = finfo_open(FILEINFO_MIME_TYPE);
        $mimeType = finfo_file($finfo, $filePath);
        $size = filesize($filePath);

        $this->headers['Content-Type'] = $mimeType;
        $this->headers['Content-Length'] = $size;
        $this->headers['Accept-Ranges'] = 'bytes';
        $this->headers['Content-Transfer-Encoding'] = 'binary';
        unset($finfo, $mimeType);

        $this->code = 200;
        $this->range['to'] = $size - 1;

        if ($range !== NULL) {
            if (preg_match('/^bytes=\d*-\d*(,\d*-\d*)*$/i', $range) === false) {
                $this->code = 416;
            } else {
                $ranges = explode(',', substr($range, 6));
                foreach ($ranges as $rangee) {
                    $parts = explode('-', $rangee);
                    $this->range['from'] = intval($parts[0]);
                    $this->range['to'] = intval($parts[1]);

                    if (empty($this->range['to'])) {
                        $this->range['to'] = $size - 1;
                    }
                    if ($this->range['from'] > $this->range['to'] || $this->range['to'] >= $size) {
                        $this->code = 416;
                    }
                }
                $this->code = 206;
            }

        }

        if ($this->code === 416) {
            $this->headers = ['Content-Range' => 'bytes */{' . $size . '}'];
        } elseif ($this->code === 206) {
            $this->headers['Content-Range'] = 'bytes {' . $this->range['from'] . '}-{' . $this->range['to'] . '}/{' . $size . '}';
        }

        $this->filepath = $filePath;
    }

    public function show()
    {
        http_response_code($this->code);

        foreach ($this->headers as $header => $value) {
            header($header . ': ' . $value);
        }

        $file = fopen($this->filepath, 'r');
        fseek($file, $this->range['from']);

        $interval = $this->range['to'] - $this->range['from'];
        $outputBufferInterval = 4 * 1000;

        if ($interval < $outputBufferInterval) {
            $outputBufferInterval = $interval;
        }

        ob_start();
        while ($interval > 0) {
            echo fread($file, $outputBufferInterval);
            $interval -= $outputBufferInterval;
            ob_flush();
        }
        fclose($file);
        ob_end_clean();

        if ($this->delete) {
            unlink($this->filepath);
        }
    }
}

I am little confused with HTTP_RANGE. Thank you,

来源：https://stackoverflow.com/questions/41013889/http-range-streaming-music-and-audio

标签

php

audio

streaming

audio-streaming

http-range