Why VideoStream class not open a external video URL? - php

Question

I'm using a class for video stream:
<?php
/**
* 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 $size = 0;
function __construct($filePath)
{
$this->path = $filePath;
}
/**
* Open stream
*/
private function open()
{
if (!($this->stream = fopen($this->path, 'rb'))) {
die('Could not open stream for reading');
}
}
/**
* Set proper header to serve the video content
*/
private function setHeader()
{
ob_get_clean();
header("Content-Type: video/mp4");
header("Cache-Control: max-age=2592000, public");
header("Expires: ".gmdate('D, d M Y H:i:s', time()+2592000) . ' GMT');
header("Last-Modified: ".gmdate('D, d M Y H:i:s', #filemtime($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
*/
private function stream()
{
$i = $this->start;
set_time_limit(0);
while(!feof($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;
}
}
/**
* Start streaming video content
*/
function start()
{
$this->open();
$this->setHeader();
$this->stream();
$this->end();
}
}
I can call this class by doing:
include_once 'videostream.php';
$stream = new VideoStream("video.mp4");
$stream->start();
This code works with local videos, but the problem is: When I try to open a external video like this:
$stream = new VideoStream("https://www.w3schools.com/html/mov_bbb.ogg");
The vídeo don't open and I don't receive any error messages? Is a fopen() problem? Is a server problem? I'm using xampp v3.3.0.
When I see Network tab in Google Chrome, I receive two headers and one of them is pending.

Answer 1

UPDATE 1 (Partial Solution)
After performing some tests I made some modifications to the code and I was able to open the video using an external URL, follow the corrections below:
1.The video that I wanna play has HTTPS (https://www.w3schools.com/html/mov_bbb.ogg) and not HTTP format, so you must change all
headers that was HTTP/1.1 to HTTPS/1.1:
header('HTTPS/1.1 416 Requested Range Not Satisfiable');
header('HTTPS/1.1 206 Partial Content');
2.The command filesize does not work when it comes to an external URL, so we need to create a function capable of getting the size of the file we want:
function getContentLengthFromURL($url){
$arrayHeaders = get_headers($url,true);
if(isset($arrayHeaders['Content-Length'])){
if(is_numeric($arrayHeaders['Content-Length']) && $arrayHeaders['Content-Length'] > 0){
return $arrayHeaders['Content-Length'];
}
}
return null;
}
After that we need to update setHeader() function:
//$this->size = filesize($this->path);
$this->size = $this->getContentLengthFromURL($this->path);
3.We need to comment out all the lines that specify the Content-Range: and Fseek()
//header("Content-Range: bytes $this->start-$this->end/$this->size");
//fseek($this->stream, $this->start);
Amazing, now the HTML5 player is able to play the video, the only problem is that you are still unable to change the time of the video.
In this case I can't jump forward or back my video.
UPDATE 2 (THE SOLUTION)
After several attempts I finally got a solution to the code problem.
The problem was in the content-ranges and in the positioning of the headers.
By the way, I created a videoStream package using the new code, if you want an automated videoStream, just access this link.