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: /mnt/lmsestudio-instance-vol002/lms_2ae1a8506d80/app/Helpers/ [ drwxr-xr-x ]
name : VideoStream.php
 <?php

namespace EstudioLMS\Helpers;

use Symfony\Component\HttpFoundation\Session\SessionInterface;

/**
 * Description of VideoStream
 *
 * @author Rana
 * @link http://codesamplez.com/programming/php-html5-video-streaming-tutorial
 */
class VideoStream
{
    private $path = "";
    private $stream = "";
    private $buffer = 102400;
    private $start = -1;
    private $end = -1;
    private $size = 0;
    /**
     * @var SessionInterface
     */
    private $session;

    /**
     * VideoStream constructor.
     * @param $filePath
     * @param SessionInterface $session
     */
    function __construct($filePath, SessionInterface $session)
    {
        $this->path = $filePath;
        $this->session = $session;
    }

    /**
     * Open stream
     */
    private function open()
    {
        if (!($this->stream = fopen($this->path, 'rb'))) {
            die('Could not open stream for reading');
        }

    }

    /**
     * Set proper header to serve the video content
     */
    private function setHeader()
    {
        ob_get_clean();
        header("Content-Type: video/mp4");
        header("Cache-Control: max-age=2592000, public");
        //header("Expires: ".gmdate('D, d M Y H:i:s', time()+2592000) . ' GMT');
        header("Expires: " . gmdate('D, d M Y H:i:s', time() + 60) . ' GMT');
        header("Last-Modified: " . gmdate('D, d M Y H:i:s', @filemtime($this->path)) . ' GMT');
        $this->start = 0;
        $this->size = filesize($this->path);
        $this->end = $this->size - 1;
        header("Accept-Ranges: 0-" . $this->end);

        if (isset($_SERVER['HTTP_RANGE'])) {

            $c_start = $this->start;
            $c_end = $this->end;

            list(, $range) = explode('=', $_SERVER['HTTP_RANGE'], 2);
            if (strpos($range, ',') !== false) {
                header('HTTP/1.1 416 Requested Range Not Satisfiable');
                header("Content-Range: bytes $this->start-$this->end/$this->size");
                exit;
            }
            if ($range == '-') {
                $c_start = $this->size - substr($range, 1);
            } else {
                $range = explode('-', $range);
                $c_start = $range[0];

                $c_end = (isset($range[1]) && is_numeric($range[1])) ? $range[1] : $c_end;
            }
            $c_end = ($c_end > $this->end) ? $this->end : $c_end;
            if ($c_start > $c_end || $c_start > $this->size - 1 || $c_end >= $this->size) {
                header('HTTP/1.1 416 Requested Range Not Satisfiable');
                header("Content-Range: bytes $this->start-$this->end/$this->size");
                exit;
            }
            $this->start = $c_start;
            $this->end = $c_end;
            $length = $this->end - $this->start + 1;
            fseek($this->stream, $this->start);
            header('HTTP/1.1 206 Partial Content');
            header("Content-Length: " . $length);
            header("Content-Range: bytes $this->start-$this->end/" . $this->size);
        } else {
            header("Content-Length: " . $this->size);
        }

    }

    /**
     * close curretly opened stream
     */
    private function end()
    {
        fclose($this->stream);
        exit;
    }

    /**
     * perform the streaming of calculated range
     * @param $invalidateUrl
     */
    private function stream($invalidateUrl)
    {
        $i = $this->start;
        set_time_limit(0);

        $twoThirds = (($this->end * 2) / 3);

        while (!feof($this->stream) && $i <= $this->end) {
            $bytesToRead = $this->buffer;
            if (($i + $bytesToRead) > $this->end) {
                $bytesToRead = $this->end - $i + 1;
            }
            $data = fread($this->stream, $bytesToRead);
            echo $data;
            flush();
            $i += $bytesToRead;
        }
        $this->invalidateUrl($invalidateUrl);
    }

    /**
     * Start streaming video content
     * @param $invalidateUrl
     */
    function start($invalidateUrl)
    {
        $this->open();
        $this->setHeader();
        $this->stream($invalidateUrl);
        $this->end();

    }

    /**
     * @param $invalidateUrl
     */
    private function invalidateUrl($invalidateUrl)
    {
        $invalidate = [];
        if ($this->session->has('invalidate-url')) {
            $invalidate[] = $this->session->get('invalidate-url');
        }
        $invalidate[] = $invalidateUrl;
        $this->session->set('invalidate-url', $invalidate);
        $this->session->save();
        \Log::info('Invalidei a url ' . $invalidateUrl);
    }
}