private function exportPNG($sData)
{
$this->getOutput()->disable();
global $wgRequest, $wgSVGConverter, $wgSVGConverters, $wgSVGConverterPath, $IP;
if ($wgSVGConverter == false || !isset($wgSVGConverters[$wgSVGConverter])) {
echo wfMessage('bs-statistics-err-converter')->plain();
return false;
}
$sFileName = wfTimestampNow();
$sFileExt = '.svg';
$oStatus = BsFileSystemHelper::saveToCacheDirectory($sFileName . $sFileExt, $sData, 'Statistics');
if (!$oStatus->isGood()) {
echo $oStatus->getMessage();
return false;
}
$sCacheDir = $oStatus->getValue();
$cmd = str_replace(array('$path/', '$width', '$height', '$input', '$output'), array($wgSVGConverterPath ? wfEscapeShellArg("{$wgSVGConverterPath}/") : "", intval($wgRequest->getVal('width', 600)), intval($wgRequest->getVal('height', 400)), wfEscapeShellArg($sCacheDir . '/' . $sFileName . $sFileExt), wfEscapeShellArg($sCacheDir)), $wgSVGConverters[$wgSVGConverter]) . " 2>&1";
$err = wfShellExec($cmd);
unlink($sCacheDir . '/' . $sFileName . $sFileExt);
$sFileExt = '.png';
if (!file_exists($sCacheDir . '/' . $sFileName . $sFileExt)) {
echo $err;
return false;
}
$this->getRequest()->response()->header("Content-Type:image/png");
$this->getRequest()->response()->header("Content-Disposition:attachment; filename={$sFileName}{$sFileExt}");
readfile($sCacheDir . '/' . $sFileName . $sFileExt);
unlink($sCacheDir . '/' . $sFileName . $sFileExt);
return true;
}
