Addons.php
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Admin.php
4 years ago
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Announcements.php
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Assets.php
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Backend_Page_Trait.php
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Course_Filter.php
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Dashboard.php
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Q_and_A.php
3 years ago
Question_Answers_List.php
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Tutor_List_Table.php
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Tutor_Setup.php
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Upgrader.php
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User.php
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Utils.php
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Video_Stream.php
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Video_Stream.php
140 lines
| 1 | <?php |
| 2 | /** |
| 3 | * Created by PhpStorm. |
| 4 | * User: themeum |
| 5 | * Date: 24/9/18 |
| 6 | * Time: 4:03 PM |
| 7 | */ |
| 8 | |
| 9 | namespace TUTOR; |
| 10 | |
| 11 | if ( ! defined( 'ABSPATH' ) ) { |
| 12 | exit; |
| 13 | } |
| 14 | |
| 15 | |
| 16 | /** |
| 17 | * Class Video_Stream |
| 18 | * |
| 19 | * @package TUTOR |
| 20 | * |
| 21 | * TUTOR Video Stream Class |
| 22 | * @since v.1.0.0 |
| 23 | */ |
| 24 | |
| 25 | class Video_Stream { |
| 26 | |
| 27 | private $path = ''; |
| 28 | private $stream = ''; |
| 29 | private $buffer = 102400; |
| 30 | private $start = -1; |
| 31 | private $end = -1; |
| 32 | private $size = 0; |
| 33 | |
| 34 | private $videoFormats; |
| 35 | |
| 36 | function __construct( $filePath ) { |
| 37 | $this->videoFormats = apply_filters( |
| 38 | 'tutor_video_types', |
| 39 | array( |
| 40 | 'mp4' => 'video/mp4', |
| 41 | 'webm' => 'video/webm', |
| 42 | 'ogg' => 'video/ogg', |
| 43 | ) |
| 44 | ); |
| 45 | $this->path = $filePath; |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Open stream |
| 50 | */ |
| 51 | private function open() { |
| 52 | if ( ! ( $this->stream = fopen( $this->path, 'rb' ) ) ) { |
| 53 | die( 'Could not open stream for reading' ); |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Set proper header to serve the video content |
| 59 | */ |
| 60 | private function setHeader() { |
| 61 | ob_get_clean(); |
| 62 | |
| 63 | header( 'Content-Type: ' . $this->videoFormats[ strtolower( pathinfo( $this->path, PATHINFO_EXTENSION ) ) ] ); |
| 64 | header( 'Cache-Control: max-age=2592000, public' ); |
| 65 | header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', tutor_time() + 2592000 ) . ' GMT' ); |
| 66 | header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s', @filemtime( $this->path ) ) . ' GMT' ); |
| 67 | $this->start = 0; |
| 68 | $this->size = filesize( $this->path ); |
| 69 | $this->end = $this->size - 1; |
| 70 | header( 'Accept-Ranges: 0-' . $this->end ); |
| 71 | |
| 72 | if ( isset( $_SERVER['HTTP_RANGE'] ) ) { |
| 73 | $c_end = $this->end; |
| 74 | list(, $range) = explode( '=', $_SERVER['HTTP_RANGE'], 2 ); |
| 75 | |
| 76 | if ( $range == '-' ) { |
| 77 | $c_start = $this->size - substr( $range, 1 ); |
| 78 | } else { |
| 79 | $range = explode( '-', $range ); |
| 80 | $c_start = $range[0]; |
| 81 | |
| 82 | $c_end = ( isset( $range[1] ) && is_numeric( $range[1] ) ) ? $range[1] : $c_end; |
| 83 | } |
| 84 | $c_end = ( $c_end > $this->end ) ? $this->end : $c_end; |
| 85 | if ( $c_start > $c_end || $c_start > $this->size - 1 || $c_end >= $this->size ) { |
| 86 | header( 'HTTP/1.1 416 Requested Range Not Satisfiable' ); |
| 87 | header( "Content-Range: bytes $this->start-$this->end/$this->size" ); |
| 88 | exit; |
| 89 | } |
| 90 | $this->start = $c_start; |
| 91 | $this->end = $c_end; |
| 92 | $length = $this->end - $this->start + 1; |
| 93 | header( 'HTTP/1.1 206 Partial Content' ); |
| 94 | header( 'Content-Length: ' . $length ); |
| 95 | header( "Content-Range: bytes $this->start-$this->end/" . $this->size ); |
| 96 | header( 'Accept-Ranges: bytes' ); |
| 97 | } else { |
| 98 | header( 'Content-Length: ' . $this->size ); |
| 99 | } |
| 100 | |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * close currently opened stream |
| 105 | */ |
| 106 | private function end() { |
| 107 | fclose( $this->stream ); |
| 108 | exit; |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * perform the streaming of calculated range |
| 113 | */ |
| 114 | private function stream() { |
| 115 | $i = $this->start; |
| 116 | set_time_limit( 0 ); |
| 117 | while ( ! feof( $this->stream ) && $i <= $this->end ) { |
| 118 | $bytesToRead = $this->buffer; |
| 119 | if ( ( $i + $bytesToRead ) > $this->end ) { |
| 120 | $bytesToRead = $this->end - $i + 1; |
| 121 | } |
| 122 | // $data = fread($this->stream, $bytesToRead); |
| 123 | $data = @stream_get_contents( $this->stream, $bytesToRead, $i ); |
| 124 | echo $data; |
| 125 | flush(); |
| 126 | $i += $bytesToRead; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * Start streaming tutor video content |
| 132 | */ |
| 133 | function start() { |
| 134 | $this->open(); |
| 135 | $this->setHeader(); |
| 136 | $this->stream(); |
| 137 | $this->end(); |
| 138 | } |
| 139 | } |
| 140 |