124 lines
3.8 KiB
PHP
124 lines
3.8 KiB
PHP
<?php
|
|
|
|
/**
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; under version 2
|
|
* of the License (non-upgradable).
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
* Copyright (c) 2016 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT);
|
|
*
|
|
*/
|
|
|
|
namespace oat\tao\model\stream;
|
|
|
|
use Psr\Http\Message\StreamInterface;
|
|
use Psr\Http\Message\ServerRequestInterface;
|
|
|
|
/**
|
|
* Class StreamRange
|
|
* @package oat\tao\model\stream
|
|
* @author Aleh Hutnikau <hutnikau@1pt.com>
|
|
*/
|
|
class StreamRange
|
|
{
|
|
/**
|
|
* @var integer
|
|
*/
|
|
private $firstPos;
|
|
|
|
/**
|
|
* @var integer
|
|
*/
|
|
private $lastPos;
|
|
|
|
/**
|
|
* StreamRange constructor.
|
|
* @param StreamInterface $stream
|
|
* @param string $range
|
|
* @throws
|
|
*/
|
|
public function __construct(StreamInterface $stream, $range)
|
|
{
|
|
$range = trim($range);
|
|
$length = $stream->getSize();
|
|
if (preg_match('/^(\d+)\-$/', $range, $match)) {
|
|
$this->firstPos = intval($match[1]);
|
|
|
|
if ($this->firstPos > ($length - 1)) {
|
|
throw new StreamRangeException('HTTP/1.1 416 Requested Range Not Satisfiable');
|
|
}
|
|
$this->lastPos = $length - 1;
|
|
} elseif (preg_match('/^(\d+)\-(\d+)$/', $range, $match)) {
|
|
$this->firstPos = intval($match[1]);
|
|
$this->lastPos = intval($match[2]);
|
|
|
|
if ($this->lastPos < $this->firstPos || $this->lastPos > ($length - 1)) {
|
|
throw new StreamRangeException('HTTP/1.1 416 Requested Range Not Satisfiable');
|
|
}
|
|
} elseif (preg_match('/^\-(\d+)$/', $range, $match)) {
|
|
$suffixLength = intval($match[1]);
|
|
|
|
if ($suffixLength === 0 || $suffixLength > $length) {
|
|
throw new StreamRangeException('HTTP/1.1 416 Requested Range Not Satisfiable');
|
|
}
|
|
|
|
$this->firstPos = $length - $suffixLength;
|
|
$this->lastPos = $length - 1;
|
|
} else {
|
|
throw new StreamRangeException('HTTP/1.1 416 Requested Range Not Satisfiable');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Create array of StreamRange instances based on current request range headers
|
|
* @param StreamInterface $stream
|
|
* @param ServerRequestInterface $request
|
|
* @throws StreamRangeException
|
|
* @return StreamRange[]
|
|
*/
|
|
public static function createFromRequest(StreamInterface $stream, ServerRequestInterface $request = null)
|
|
{
|
|
$result = [];
|
|
if ($request === null) {
|
|
$headers = \tao_helpers_Http::getHeaders();
|
|
$rangeHeader = isset($headers['Range']) ? [$headers['Range']] : null;
|
|
} else {
|
|
$rangeHeader = $request->hasHeader('Range') ? $request->getHeader('Range') : null;
|
|
}
|
|
if ($rangeHeader) {
|
|
$ranges = explode(',', $rangeHeader[0]);
|
|
foreach ($ranges as $range) {
|
|
$range = str_replace('bytes=', '', $range);
|
|
$result[] = new StreamRange($stream, $range);
|
|
}
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* @return int
|
|
*/
|
|
public function getFirstPos()
|
|
{
|
|
return $this->firstPos;
|
|
}
|
|
|
|
/**
|
|
* @return int
|
|
*/
|
|
public function getLastPos()
|
|
{
|
|
return $this->lastPos;
|
|
}
|
|
}
|