129 lines
2.8 KiB
PHP
129 lines
2.8 KiB
PHP
<?php
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namespace App\Helpers;
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/**
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* Description of VideoStream
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*
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* @author Rana
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* @link http://codesamplez.com/programming/php-html5-video-streaming-tutorial
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**/
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class VideoStream
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{
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private $path = '';
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private $stream = '';
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private $buffer = 102400;
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private $start = -1;
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private $end = -1;
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private $size = 0;
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function __construct($filePath)
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{
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$this->path = $filePath;
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}
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/**
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* Open stream
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**/
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private function open()
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{
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if (! ($this->stream = fopen($this->path,'rb')) ) {
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die('Could not open stream for reading');
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}
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}
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/**
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* Set proper header to serve the video content
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**/
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private function setHeader()
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{
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ob_get_clean();
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header('Content-Type: video/mp4');
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header('Cache-Control: max-age=2592000, public');
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header('Expires: '.gmdate('D, d M Y H:i:s',time()+2592000) . ' GMT');
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header('Last-Modified: '.gmdate('D, d M Y H:i:s',@filemtime($this->path)) . ' GMT' );
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$this->start = 0;
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$this->size = filesize($this->path);
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$this->end = $this->size - 1;
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header('Accept-Ranges: 0-'.$this->end);
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if (isset($_SERVER['HTTP_RANGE'])) {
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$c_start = $this->start;
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$c_end = $this->end;
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list(,$range) = explode('=',$_SERVER['HTTP_RANGE'],2);
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if (strpos($range,',') !== false) {
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header('HTTP/1.1 416 Requested Range Not Satisfiable');
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header("Content-Range: bytes $this->start-$this->end/$this->size");
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exit;
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}
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if ($range == '-') {
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$c_start = $this->size - substr($range,1);
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}else{
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$range = explode('-',$range);
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$c_start = $range[0];
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$c_end = (isset($range[1]) && is_numeric($range[1])) ? $range[1] : $c_end;
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}
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$c_end = ($c_end > $this->end) ? $this->end : $c_end;
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if ($c_start > $c_end || $c_start > $this->size - 1 || $c_end >= $this->size) {
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header('HTTP/1.1 416 Requested Range Not Satisfiable');
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header("Content-Range: bytes $this->start-$this->end/$this->size");
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exit;
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}
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$this->start = $c_start;
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$this->end = $c_end;
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$length = $this->end - $this->start + 1;
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fseek($this->stream,$this->start);
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header('HTTP/1.1 206 Partial Content');
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header("Content-Length: ".$length);
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header("Content-Range: bytes $this->start-$this->end/".$this->size);
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}
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else
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{
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header("Content-Length: ".$this->size);
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}
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}
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/**
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* close curretly opened stream
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**/
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private function end()
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{
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fclose($this->stream);
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exit;
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}
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/**
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* perform the streaming of calculated range
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**/
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private function stream()
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{
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$i = $this->start;
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set_time_limit(0);
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while(!feof($this->stream) && $i <= $this->end) {
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$bytesToRead = $this->buffer;
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if (($i+$bytesToRead) > $this->end) {
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$bytesToRead = $this->end - $i + 1;
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}
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$data = fread($this->stream,$bytesToRead);
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echo $data;
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flush();
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$i += $bytesToRead;
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}
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}
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/**
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* Start streaming video content
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**/
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function start()
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{
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$this->open();
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$this->setHeader();
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$this->stream();
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$this->end();
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}
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}
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