function assertMetadata($infile, $expected)
{
try {
$data = SVGMetadataExtractor::getMetadata($infile);
$this->assertEquals($expected, $data, 'SVG metadata extraction test');
} catch (MWException $e) {
if ($expected === false) {
$this->assertTrue(true, 'SVG metadata extracted test (expected failure)');
} else {
throw $e;
}
}
}
/**
* Convert passed image data, which is assumed to be SVG, to PNG.
*
* @param string $svg SVG image data
* @return string|bool PNG image data, or false on failure
*/
protected function rasterize($svg)
{
// This code should be factored out to a separate method on SvgHandler, or perhaps a separate
// class, with a separate set of configuration settings.
//
// This is a distinct use case from regular SVG rasterization:
// * We can skip many sanity and security checks (as the images come from a trusted source,
// rather than from the user).
// * We need to provide extra options to some converters to achieve acceptable quality for very
// small images, which might cause performance issues in the general case.
// * We want to directly pass image data to the converter, rather than a file path.
//
// See https://phabricator.wikimedia.org/T76473#801446 for examples of what happens with the
// default settings.
//
// For now, we special-case rsvg (used in WMF production) and do a messy workaround for other
// converters.
global $wgSVGConverter, $wgSVGConverterPath;
$svg = $this->massageSvgPathdata($svg);
// Sometimes this might be 'rsvg-secure'. Long as it's rsvg.
if (strpos($wgSVGConverter, 'rsvg') === 0) {
$command = 'rsvg-convert';
if ($wgSVGConverterPath) {
$command = wfEscapeShellArg("{$wgSVGConverterPath}/") . $command;
}
$process = proc_open($command, array(0 => array('pipe', 'r'), 1 => array('pipe', 'w')), $pipes);
if (is_resource($process)) {
fwrite($pipes[0], $svg);
fclose($pipes[0]);
$png = stream_get_contents($pipes[1]);
fclose($pipes[1]);
proc_close($process);
return $png ?: false;
}
return false;
} else {
// Write input to and read output from a temporary file
$tempFilenameSvg = tempnam(wfTempDir(), 'ResourceLoaderImage');
$tempFilenamePng = tempnam(wfTempDir(), 'ResourceLoaderImage');
file_put_contents($tempFilenameSvg, $svg);
$metadata = SVGMetadataExtractor::getMetadata($tempFilenameSvg);
if (!isset($metadata['width']) || !isset($metadata['height'])) {
unlink($tempFilenameSvg);
return false;
}
$handler = new SvgHandler();
$res = $handler->rasterize($tempFilenameSvg, $tempFilenamePng, $metadata['width'], $metadata['height']);
unlink($tempFilenameSvg);
$png = null;
if ($res === true) {
$png = file_get_contents($tempFilenamePng);
unlink($tempFilenamePng);
}
return $png ?: false;
}
}
/**
* @param File $file
* @param string $filename
* @return string Serialised metadata
*/
function getMetadata($file, $filename)
{
$metadata = array('version' => self::SVG_METADATA_VERSION);
try {
$metadata += SVGMetadataExtractor::getMetadata($filename);
} catch (MWException $e) {
// @todo SVG specific exceptions
// File not found, broken, etc.
$metadata['error'] = array('message' => $e->getMessage(), 'code' => $e->getCode());
wfDebug(__METHOD__ . ': ' . $e->getMessage() . "\n");
}
return serialize($metadata);
}
function getMetadata($file, $filename)
{
try {
$metadata = SVGMetadataExtractor::getMetadata($filename);
} catch (Exception $e) {
// Broken file?
wfDebug(__METHOD__ . ': ' . $e->getMessage() . "\n");
return '0';
}
$metadata['version'] = self::SVG_METADATA_VERSION;
return serialize($metadata);
}
