/**
* Determines whether a file is text or binary by checking the first few bytes in the file.
* The exact number of bytes is system dependent, but it is typically several thousand.
* If every byte in that part of the file is non-null, considers the file to be text;
* otherwise it considers the file to be binary.
*
* @param string $file
* @return boolean
*/
public static function isBinary($file)
{
// open file
$file = new File($file, 'rb');
// get block size
$stat = $file->stat();
$blockSize = $stat['blksize'];
if ($blockSize < 0) {
$blockSize = 1024;
}
if ($blockSize > $file->filesize()) {
$blockSize = $file->filesize();
}
if ($blockSize <= 0) {
return false;
}
// get bytes
$block = $file->read($blockSize);
return strlen($block) == 0 || preg_match_all('/\\x00/', $block, $match) > 0;
}
/**
* Adds a file to the tar archive.
*
* @param string $filename
* @param string $addDir
* @param string $removeDir
* @return boolean result
*/
protected function addFile($filename, $addDir, $removeDir)
{
$filename = FileUtil::unifyDirSeparator($filename);
$storedFilename = $filename;
if (!empty($removeDir)) {
$storedFilename = StringUtil::replaceIgnoreCase($removeDir, '', $filename);
}
if (!empty($addDir)) {
$storedFilename = $addDir . $storedFilename;
}
if (is_file($filename)) {
// open file
$file = new File($filename, 'rb');
// write header
if (!$this->writeFileHeader($filename, $storedFilename)) {
return false;
}
// write file content
while (($buffer = $file->read(512)) != '') {
$this->file->write(pack('a512', $buffer));
}
// close file
$file->close();
} else {
// only directory header
if (!$this->writeFileHeader($filename, $storedFilename)) {
return false;
}
}
return true;
}
/**
* Determines whether a file is text or binary by checking the first few bytes in the file.
* The exact number of bytes is system dependent, but it is typically several thousand.
* If every byte in that part of the file is non-null, considers the file to be text;
* otherwise it considers the file to be binary.
*
* @param string $file
* @return boolean
*/
public static function isBinary($file) {
// open file
$file = new File($file, 'rb');
// get block size
$stat = $file->stat();
$blockSize = $stat['blksize'];
if ($blockSize < 0) $blockSize = 1024;
if ($blockSize > $file->filesize()) $blockSize = $file->filesize();
if ($blockSize <= 0) return false;
// get bytes
$block = $file->read($blockSize);
return (strlen($block) == 0 || strpos($block, "\0") !== false);
}
/**
* Sends the actual file to the client.
*/
protected function sendFile()
{
if ($this->startByte > 0 || $this->endByte < $this->options['filesize'] - 1) {
$file = new File($this->location, 'rb');
if ($this->startByte > 0) {
$file->seek($this->startByte);
}
while ($this->startByte <= $this->endByte) {
$remainingBytes = $this->endByte - $this->startByte;
$readBytes = $remainingBytes > 1048576 ? 1048576 : $remainingBytes + 1;
echo $file->read($readBytes);
$this->startByte += $readBytes;
}
$file->close();
} else {
readfile($this->location);
}
}
