General help

I traced source codes of Spout module. I found Spout used sys_get_temp_dir() php builtin function. Windows system default temp directory
is C:\Windows\temp. PHP process lacked list folder permissions in temp directory, so occurred RecursiveDirectoryIterator executing error.
I fixed this problem by adding some lines in \lib\classes\dataformat\spout_base.php are shown below：


    public function send_http_headers() {
        $this->writer = \Box\Spout\Writer\WriterFactory::create($this->spouttype);
        //======================================================
        // added as below
        if( $this->spouttype == 'ods' || $this->spouttype == 'xlsx' )
        {
            global $CFG ;
            $this->writer->setTempFolder( $CFG->dataroot.'/temp/dataformat' );  
        }   
        // =====================================================
        $filename = $this->filename . $this->get_extension();
        $this->writer->openToBrowser($filename);
        if ($this->sheettitle && $this->writer instanceof \Box\Spout\Writer\AbstractMultiSheetsWriter) {
            $sheet = $this->writer->getCurrentSheet();
            $sheet->setName($this->sheettitle);
        }
    }