/**
* check if the request has sent some headers
*/
private function _validate_headers()
{
// check the security nonce
if (is_callable($this->on_chk_nonce)) {
$nonce = $this->_get_header_value(UPLOADER_NONCE_HEADER);
if ($nonce) {
if (!call_user_func($this->on_chk_nonce, $nonce)) {
$this->_set_error(_esc('Security nonce error'), "3.0.a", false);
}
} else {
$this->_set_error(_esc('Security nonce is required'), "3.0.b", false);
}
}
$this->_content_type = $this->_get_header_value(UPLOADER_TYPE_HEADER);
$header_error = _esc('%s header expected');
if ($this->_filename) {
// overwrite the old file
_is_file($this->_filename) && unlink($this->_filename);
$this->_raw_post = $this->is_raw_post();
} else {
$this->_set_error(sprintf($header_error, UPLOADER_FILENAME_HEADER), 3.1, false);
}
// we expect a header that provides the uploaded chunk range
if (!$this->_abort) {
($this->_range = $this->get_range()) || $this->_set_error(sprintf($header_error, UPLOADER_RANGE_HEADER), 3.2, false);
}
}
public function isFile()
{
return !_is_dir($this->_path) and _is_file($this->_path);
}
