تأسست على رؤية مُختلفة، تهدف إلى تقديم تجربة فريدة من نوعها في الأثاث المكتبي والفندقي لكي نضمن بيئة عمل توفر مساحات عمل مريحة وصحية، حيث نمتاز بخبراتنا الواسعة فأصبحت أحد أفضل المؤسسات الوطنية الرائدة في تجارة وصناعة الأثاث والتصميم الداخلي والسبّاقة على مستوى المملكة في المفروشات المكتبية والفندقية والمنزلية، نهدف الى خلق قيمة لعملائنا عن طريق توفير الجودة العالية في مقابل السعر المناسب.
UX-антипаттерны в действии – Анализ скриншотов популярных онлайн-площадок Просматривая сотни скриншотов популярных онлайн-площадок, мы сразу же видим: навязчивое […]
UX-антипаттерны в действии – Анализ скриншотов популярных онлайн-площадок Просматривая сотни скриншотов популярных онлайн-площадок, мы сразу же видим: навязчивое […]
<?php
// https://stackoverflow.com/questions/157318/resumable-downloads-when-using-php-to-send-the-file
// User: DaveRandom
if (!class_exists('UpdraftPlus_NonExistentFileException')):
class UpdraftPlus_NonExistentFileException extends RuntimeException {}
endif;
if (!class_exists('UpdraftPlus_UnreadableFileException')):
class UpdraftPlus_UnreadableFileException extends RuntimeException {}
endif;
if (!class_exists('UpdraftPlus_UnsatisfiableRangeException')):
class UpdraftPlus_UnsatisfiableRangeException extends RuntimeException {}
endif;
if (!class_exists('UpdraftPlus_InvalidRangeHeaderException')):
class UpdraftPlus_InvalidRangeHeaderException extends RuntimeException {}
endif;
class UpdraftPlus_RangeHeader
{
/**
* The first byte in the file to send (0-indexed), a null value indicates the last
* $end bytes
*
* @var int|null
*/
private $firstByte;
/**
* The last byte in the file to send (0-indexed), a null value indicates $start to
* EOF
*
* @var int|null
*/
private $lastByte;
/**
* Create a new instance from a Range header string
*
* @param string $header
* @return UpdraftPlus_RangeHeader
*/
public static function createFromHeaderString($header)
{
if ($header === null) {
return null;
}
if (!preg_match('/^\s*([A-Za-z]+)\s*=\s*(\d*)\s*-\s*(\d*)\s*(?:,|$)/', $header, $info)) {
throw new UpdraftPlus_InvalidRangeHeaderException('Invalid header format');
} else if (strtolower($info[1]) !== 'bytes') {
throw new UpdraftPlus_InvalidRangeHeaderException('Unknown range unit: ' . $info[1]); // phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped -- Error messages should be escaped when caught and printed.
}
return new self(
$info[2] === '' ? null : $info[2],
$info[3] === '' ? null : $info[3]
);
}
/**
* @param int|null $firstByte
* @param int|null $lastByte
* @throws UpdraftPlus_InvalidRangeHeaderException
*/
public function __construct($firstByte, $lastByte)
{
$this->firstByte = $firstByte === null ? $firstByte : (int)$firstByte;
$this->lastByte = $lastByte === null ? $lastByte : (int)$lastByte;
if ($this->firstByte === null && $this->lastByte === null) {
throw new UpdraftPlus_InvalidRangeHeaderException(
'Both start and end position specifiers empty'
);
} else if ($this->firstByte < 0 || $this->lastByte < 0) {
throw new UpdraftPlus_InvalidRangeHeaderException(
'Position specifiers cannot be negative'
);
} else if ($this->lastByte !== null && $this->lastByte < $this->firstByte) {
throw new UpdraftPlus_InvalidRangeHeaderException(
'Last byte cannot be less than first byte'
);
}
}
/**
* Get the start position when this range is applied to a file of the specified size
*
* @param int $fileSize
* @return int
* @throws UpdraftPlus_UnsatisfiableRangeException
*/
public function getStartPosition($fileSize)
{
$size = (int)$fileSize;
if ($this->firstByte === null) {
return ($size - 1) - $this->lastByte;
}
if ($size <= $this->firstByte) {
throw new UpdraftPlus_UnsatisfiableRangeException(
'Start position is after the end of the file'
);
}
return $this->firstByte;
}
/**
* Get the end position when this range is applied to a file of the specified size
*
* @param int $fileSize
* @return int
* @throws UpdraftPlus_UnsatisfiableRangeException
*/
public function getEndPosition($fileSize)
{
$size = (int)$fileSize;
if ($this->lastByte === null) {
return $size - 1;
}
if ($size <= $this->lastByte) {
throw new UpdraftPlus_UnsatisfiableRangeException(
'End position is after the end of the file'
);
}
return $this->lastByte;
}
/**
* Get the length when this range is applied to a file of the specified size
*
* @param int $fileSize
* @return int
* @throws UpdraftPlus_UnsatisfiableRangeException
*/
public function getLength($fileSize)
{
$size = (int)$fileSize;
return $this->getEndPosition($size) - $this->getStartPosition($size) + 1;
}
/**
* Get a Content-Range header corresponding to this Range and the specified file
* size
*
* @param int $fileSize
* @return string
*/
public function getContentRangeHeader($fileSize)
{
return 'bytes ' . $this->getStartPosition($fileSize) . '-'
. $this->getEndPosition($fileSize) . '/' . $fileSize;
}
}
class UpdraftPlus_PartialFileServlet
{
/**
* The range header on which the data transmission will be based
*
* @var UpdraftPlus_RangeHeader|null
*/
private $range;
/**
* @param UpdraftPlus_RangeHeader $range Range header on which the transmission will be based
*/
public function __construct($range = null)
{
$this->range = $range;
}
/**
* Send part of the data in a seekable stream resource to the output buffer
*
* @param resource $fp Stream resource to read data from
* @param int $start Position in the stream to start reading
* @param int $length Number of bytes to read
* @param int $chunkSize Maximum bytes to read from the file in a single operation
*/
private function sendDataRange($fp, $start, $length, $chunkSize = 2097152)
{
if ($start > 0) {
fseek($fp, $start, SEEK_SET);
}
while ($length) {
$read = ($length > $chunkSize) ? $chunkSize : $length;
$length -= $read;
echo fread($fp, $read); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Raw output intended.
}
}
/**
* Send the headers that are included regardless of whether a range was requested
*
* @param string $fileName
* @param int $contentLength
* @param string $contentType
*/
private function sendDownloadHeaders($fileName, $contentLength, $contentType)
{
header('Content-Type: ' . $contentType);
header('Content-Length: ' . $contentLength);
header('Content-Disposition: attachment; filename="' . $fileName . '"');
header('Accept-Ranges: bytes');
}
/**
* Send data from a file based on the current Range header
*
* @param string $path Local file system path to serve
* @param string $contentType MIME type of the data stream
*/
public function sendFile($path, $contentType = 'application/octet-stream')
{
// Make sure the file exists and is a file, otherwise we are wasting our time
$localPath = realpath($path);
if ($localPath === false || !is_file($localPath)) {
throw new UpdraftPlus_NonExistentFileException(
$path . ' does not exist or is not a file' // phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped -- Error messages should be escaped when caught and printed.
);
}
// Make sure we can open the file for reading
if (!$fp = fopen($localPath, 'r')) {
throw new UpdraftPlus_UnreadableFileException(
'Failed to open ' . $localPath . ' for reading' // phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped -- Error messages should be escaped when caught and printed.
);
}
$fileSize = filesize($localPath);
if ($this->range == null) {
// No range requested, just send the whole file
header('HTTP/1.1 200 OK');
$this->sendDownloadHeaders(basename($localPath), $fileSize, $contentType);
fpassthru($fp);
} else {
// Send the request range
header('HTTP/1.1 206 Partial Content');
header('Content-Range: ' . $this->range->getContentRangeHeader($fileSize));
$this->sendDownloadHeaders(
basename($localPath),
$this->range->getLength($fileSize),
$contentType
);
$this->sendDataRange(
$fp,
$this->range->getStartPosition($fileSize),
$this->range->getLength($fileSize)
);
}
fclose($fp);
}
}
