/**
*
*/
protected function streamThumbnail() {
global $wgVipsThumbnailerHost, $wgVipsTestExpiry;
$request = $this->getRequest();
# Validate title and file existance
$title = Title::makeTitleSafe( NS_FILE, $request->getText( 'thumb' ) );
if ( is_null( $title ) ) {
$this->streamError( 404, "VipsScaler: invalid title\n" );
return;
}
$file = wfFindFile( $title );
if ( !$file || !$file->exists() ) {
$this->streamError( 404, "VipsScaler: file not found\n" );
return;
}
# Check if vips can handle this file
if ( VipsScaler::getVipsHandler( $file ) === false ) {
$this->streamError( 500, "VipsScaler: VIPS cannot handle this file type\n" );
return;
}
# Validate param string
$handler = $file->getHandler();
$params = array( 'width' => $request->getInt( 'width' ) );
if ( !$handler->normaliseParams( $file, $params ) ) {
$this->streamError( 500, "VipsScaler: invalid parameters\n" );
return;
}
# Get the thumbnail
if ( is_null( $wgVipsThumbnailerHost ) || $request->getBool( 'noproxy' ) ) {
# No remote scaler, need to do it ourselves.
# Emulate the BitmapHandlerTransform hook
$dstPath = VipsCommand::makeTemp( $file->getExtension() );
$dstUrl = '';
wfDebug( __METHOD__ . ": Creating vips thumbnail at $dstPath\n" );
$scalerParams = array(
# The size to which the image will be resized
'physicalWidth' => $params['physicalWidth'],
'physicalHeight' => $params['physicalHeight'],
'physicalDimensions' => "{$params['physicalWidth']}x{$params['physicalHeight']}",
# The size of the image on the page
'clientWidth' => $params['width'],
'clientHeight' => $params['height'],
# Comment as will be added to the EXIF of the thumbnail
'comment' => isset( $params['descriptionUrl'] ) ?
"File source: {$params['descriptionUrl']}" : '',
# Properties of the original image
'srcWidth' => $file->getWidth(),
'srcHeight' => $file->getHeight(),
'mimeType' => $file->getMimeType(),
'srcPath' => $file->getPath(),
'dstPath' => $dstPath,
'dstUrl' => $dstUrl,
);
$options = array();
if ( $request->getBool( 'bilinear' ) ) {
$options['bilinear'] = true;
wfDebug( __METHOD__ . ": using bilinear scaling\n" );
}
if ( $request->getVal( 'sharpen' ) && $request->getVal( 'sharpen' ) < 5 ) {
# Limit sharpen sigma to 5, otherwise we have to write huge convolution matrices
$options['sharpen'] = array( 'sigma' => floatval( $request->getVal( 'sharpen' ) ) );
wfDebug( __METHOD__ . ": sharpening with radius {$options['sharpen']}\n" );
}
# Call the hook
$mto = null;
VipsScaler::doTransform( $handler, $file, $scalerParams, $options, $mto );
if ( $mto && !$mto->isError() ) {
wfDebug( __METHOD__ . ": streaming thumbnail...\n" );
$this->getOutput()->disable();
StreamFile::stream( $dstPath, array(
"Cache-Control: public, max-age=$wgVipsTestExpiry, s-maxage=$wgVipsTestExpiry",
'Expires: ' . gmdate( 'r ', time() + $wgVipsTestExpiry )
) );
} else {
$this->streamError( 500, $mto->getHtmlMsg() );
}
# Cleanup the temporary file
wfSuppressWarnings();
unlink( $dstPath );
wfRestoreWarnings();
} else {
# Request the thumbnail at a remote scaler
$url = wfExpandUrl( $request->getRequestURL(), PROTO_INTERNAL );
$url = wfAppendQuery( $url, array( 'noproxy' => '1' ) );
wfDebug( __METHOD__ . ": Getting vips thumb from remote url $url\n" );
$bits = IP::splitHostAndPort( $wgVipsThumbnailerHost );
if ( !$bits ) {
throw new MWException( __METHOD__.': $wgVipsThumbnailerHost is not set to a valid host' );
}
list( $host, $port ) = $bits;
if ( $port === false ) {
$port = 80;
}
$proxy = IP::combineHostAndPort( $host, $port );
$options = array(
'method' => 'GET',
'proxy' => $proxy,
);
$req = MWHttpRequest::factory( $url, $options );
$status = $req->execute();
if ( $status->isOk() ) {
# Disable output and stream the file
$this->getOutput()->disable();
wfResetOutputBuffers();
header( 'Content-Type: ' . $file->getMimeType() );
header( 'Content-Length: ' . strlen( $req->getContent() ) );
header( "Cache-Control: public, max-age=$wgVipsTestExpiry, s-maxage=$wgVipsTestExpiry" );
header( 'Expires: ' . gmdate( 'r ', time() + $wgVipsTestExpiry ) );
print $req->getContent();
} elseif ( $status->hasMessage( 'http-bad-status' ) ) {
$this->streamError( 500, $req->getContent() );
return;
} else {
global $wgOut;
$this->streamError( 500, $wgOut->parse( $status->getWikiText() ) );
return;
}
}
}
/**
* @return int
*/
public function execute() {
# Convert a 2D array into a space/newline separated matrix
$convolutionMatrix = array_pop( $this->args );
$convolutionString = '';
foreach ( $convolutionMatrix as $row ) {
$convolutionString .= implode( ' ', $row ) . "\n";
}
# Save the matrix in a tempfile
$convolutionFile = self::makeTemp( 'conv' );
file_put_contents( $convolutionFile, $convolutionString );
array_push( $this->args, $convolutionFile );
wfDebug( __METHOD__ . ": Convolving image [\n" . $convolutionString . "] \n" );
# Call the parent to actually execute the command
$retval = parent::execute();
# Remove the temporary matrix file
unlink( $convolutionFile );
return $retval;
}
