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<?php |
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namespace CodingSocks\UploadHandler\Range; |
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use CodingSocks\UploadHandler\Exception\RequestEntityTooLargeHttpException; |
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use Illuminate\Http\Request; |
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use Illuminate\Http\Response; |
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use InvalidArgumentException; |
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use Symfony\Component\HttpFoundation\HeaderBag; |
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use Symfony\Component\HttpKernel\Exception\HttpException; |
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class ContentRange implements Range |
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{ |
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/** |
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* @var float |
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*/ |
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protected $start; |
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/** |
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* @var float |
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*/ |
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protected $end; |
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/** |
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* @var float |
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*/ |
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protected $total; |
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/** |
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* ContentRange constructor. |
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* |
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* @param string|\Symfony\Component\HttpFoundation\HeaderBag|\Illuminate\Http\Request $contentRange |
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*/ |
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public function __construct($contentRange) |
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{ |
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if ($contentRange instanceof Request) { |
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$contentRange = $contentRange->header('content-range'); |
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} elseif ($contentRange instanceof HeaderBag) { |
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$contentRange = $contentRange->get('content-range'); |
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} |
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if (preg_match('#bytes (\d+)-(\d+)/(\d+)#', $contentRange, $matches) !== 1) { |
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throw new InvalidArgumentException('Content Range header is missing or invalid'); |
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} |
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$this->start = $this->numericValue($matches[1]); |
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$this->end = $this->numericValue($matches[2]); |
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$this->total = $this->numericValue($matches[3]); |
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if ($this->end < $this->start) { |
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throw new InvalidArgumentException('Range end must be greater than or equal to range start'); |
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} |
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if ($this->total <= $this->end) { |
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throw new InvalidArgumentException('Size must be greater than range end'); |
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} |
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} |
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/** |
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* Converts the string value to float - throws exception if float value is exceeded. |
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* |
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* @param string $value |
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* |
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* @return float |
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* @throws \Symfony\Component\HttpKernel\Exception\HttpException |
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*/ |
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protected function numericValue($value): float |
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{ |
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$floatVal = floatval($value); |
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if ($floatVal === INF) { |
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throw new RequestEntityTooLargeHttpException('The content range value is too large'); |
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} |
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return $floatVal; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function getStart(): float |
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{ |
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return $this->start; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function getEnd(): float |
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{ |
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return $this->end; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function getTotal(): float |
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{ |
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return $this->total; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function isFirst(): bool |
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{ |
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return $this->start === 0.0; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function isLast(): bool |
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{ |
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return $this->end >= ($this->total - 1); |
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} |
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/** |
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* @return float |
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*/ |
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public function getPercentage(): float |
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{ |
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return floor(($this->end + 1) / $this->total * 100); |
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} |
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} |
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