/**
* Gets the contents of the attachment given by it's database identifier from the filesystem
*
* @param $id integer the database identifier of the attachment
* @return string the contents of the attachment or null on error
*/
protected function getAttachmentContentFromFS($id)
{
$query = "SELECT file_size,compression_type,file_path " . " FROM {$this->tables['attachments']} WHERE id = {$id}";
$row = $this->db->fetchFirstRow($query);
$content = null;
if ($row) {
$filePath = $row['file_path'];
$fileSize = $row['file_size'];
$destFPath = $this->repositoryPath . DIRECTORY_SEPARATOR . $filePath;
switch ($row['compression_type']) {
case TL_REPOSITORY_COMPRESSIONTYPE_NONE:
$content = getFileContents($destFPath);
break;
case TL_REPOSITORY_COMPRESSIONTYPE_GZIP:
$content = gzip_readFileContent($destFPath, $fileSize);
break;
}
}
return $content;
}
/**
* uncompresses arbitrary gzipped content
*
* @param string content the compressed content
* @param int $fileSize the original size of the uncompressed content
*
* @return string returns the uncompressed contents on success or null on error
*/
function gzip_uncompress_content($content, $fileSize)
{
global $g_repositoryPath;
$dest = $g_repositoryPath . DIRECTORY_SEPARATOR . session_id() . ".dummy.gz";
$fp = fopen($dest, "wb");
if ($fp) {
fwrite($fp, $content, strlen($content));
fclose($fp);
return gzip_readFileContent($dest, $fileSize);
}
return null;
}
