/**
*
* @param type $ThisFileInfoIndex
* @param type $filename
* @param type $offset
* @param type $length
* @return boolean
* @throws Exception
*/
public function saveAttachment(&$ThisFileInfoIndex, $filename, $offset, $length)
{
try {
if (!GetId3_Lib_Helper::intValueSupported($offset + $length)) {
throw new Exception('it extends beyond the ' . round(PHP_INT_MAX / 1073741824) . 'GB limit');
}
// do not extract at all
if ($this->getid3->option_save_attachments === self::ATTACHMENTS_NONE) {
unset($ThisFileInfoIndex);
// do not set any
} else {
if ($this->getid3->option_save_attachments === self::ATTACHMENTS_INLINE) {
// get whole data in one pass, till it is anyway stored in memory
$this->fseek($offset);
$ThisFileInfoIndex = $this->fread($length);
if ($ThisFileInfoIndex === false || strlen($ThisFileInfoIndex) != $length) {
// verify
throw new Exception('failed to read attachment data');
}
} else {
// set up destination path
$dir = rtrim(str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $this->getid3->option_save_attachments), DIRECTORY_SEPARATOR);
if (!is_dir($dir) || !is_writable($dir)) {
// check supplied directory
throw new Exception('supplied path (' . $dir . ') does not exist, or is not writable');
}
$dest = $dir . DIRECTORY_SEPARATOR . $filename;
// create dest file
if (($fp_dest = fopen($dest, 'wb')) == false) {
throw new Exception('failed to create file ' . $dest);
}
// copy data
$this->fseek($offset);
$buffersize = $this->data_string_flag ? $length : $this->getid3->fread_buffer_size();
$bytesleft = $length;
while ($bytesleft > 0) {
if (($buffer = $this->fread(min($buffersize, $bytesleft))) === false || ($byteswritten = fwrite($fp_dest, $buffer)) === false) {
fclose($fp_dest);
unlink($dest);
throw new Exception($buffer === false ? 'not enough data to read' : 'failed to write to destination file, may be not enough disk space');
}
$bytesleft -= $byteswritten;
}
fclose($fp_dest);
$ThisFileInfoIndex = $dest;
}
}
} catch (Exception $e) {
unset($ThisFileInfoIndex);
// do not set any is case of error
$this->warning('Failed to extract attachment ' . $filename . ': ' . $e->getMessage());
return false;
}
return true;
}
