Tika configuration for ZIP parser - apache-tika

Question

Is it possible to tell Tika or the parser that a ZIP can only contain files with a certain MimeType or file extension?
What iam currently use is the recursive parser to get all the information for every file.
final ParseContext context = new ParseContext();
final ContentHandlerFactory contentHandlerFactory = new BasicContentHandlerFactory( BasicContentHandlerFactory.HANDLER_TYPE.TEXT, -1 );
final RecursiveParserWrapperHandler recursiveParserWrapperHandler = new RecursiveParserWrapperHandler( contentHandlerFactory );
final RecursiveParserWrapper parser = new RecursiveParserWrapper( autoDetectParser );
context.set( Parser.class, parser );
parser.parse( tikaInputStream, recursiveParserWrapperHandler, metadata, context );
I am looking for a solution that the zip can only contain one file type and cannot contain any other zip/container. Currently I'm doing this by hand, but maybe there's a better solution. Especially with regard to zip bombing, another solution makes more sense.
final String contentType = metadata1.get( Metadata.CONTENT_TYPE );
final MediaType mediaType = MediaType.parse( contentType );
final MediaType expectedMediaType = MediaType.text( "turtle" );
final String depth = metadata1.get( TikaCoreProperties.EMBEDDED_DEPTH );
if ( MediaType.APPLICATION_ZIP.equals( mediaType ) ) {
if ( Integer.parseInt( depth ) > 0 ) {
throw new RuntimeException( "Not allowed depth path" );
}
return;
}
if ( !expectedMediaType.equals( mediaType ) ) {
throw new RuntimeException( "Not allowed media type" );
}

Answer 1

I added a own RecursiveParserWrapperHandler. Here is an example when the maximum embedded count is reached an exception is thrown.
public class ZipHandler extends RecursiveParserWrapperHandler {
private static final int MAX_EMBEDDED_ENTRIES = 10000;
public ZipHandler( final ContentHandlerFactory contentHandlerFactory ) {
super( contentHandlerFactory, MAX_EMBEDDED_ENTRIES );
}
#Override
public void endDocument( final ContentHandler contentHandler, final Metadata metadata ) throws SAXException {
if ( hasHitMaximumEmbeddedResources() ) {
throw new SAXException( "Max embedded entries reached: " + MAX_EMBEDDED_ENTRIES );
}
super.endDocument( contentHandler, metadata );
}
}