/**
* Uses variants of the UNIX "file" command to attempt to determine the
* MIME type of an unknown byte stream.
*
* @access public
* @param string $data The file data to analyze.
* @return string The MIME type of the file. Returns false if either
* the file type isn't recognized or the file command is
* not available.
*/
function analyzeData($data)
{
/* Use a built-in magic file. */
$mime_magic =& DOCMAN_MIME_Magic::_getMimeMagicFile();
foreach ($mime_magic as $offset => $odata) {
foreach ($odata as $length => $ldata) {
$lookup = substr($data, $offset, $length);
if (!empty($ldata[$lookup])) {
return $ldata[$lookup];
}
}
}
return false;
}
/**
* Validate file extension
*
* @desc This is the function handling the file extension validation when uploading.
* @param void
* @return boolean Returns true if extension is valid and false if not. Sets $this->err with error message if false.
*/
function validateExt($name)
{
if (!$name) {
return false;
}
if (!$this->ext_array) {
return true;
}
$valid_ext = preg_replace("/^[.](.*)\$/", "\$1", $this->ext_array);
// Simple lookup first ...
$extension = @strtolower(@substr($name, strrpos($name, ".") + 1));
if ($extension && in_array($extension, $valid_ext)) {
return true;
}
// Translate to mimetype for wider test...
$extension = DOCMAN_MIME_Magic::MIMEToExt(DOCMAN_MIME_Magic::filenameToMIME($name));
if (in_array($extension, $valid_ext)) {
return true;
}
$this->_err .= _DML_FILETYPE . " "" . $extension . "" " . _DML_NOTPERMITED;
return false;
}