| /******************************************************************************* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| ******************************************************************************/ |
| package org.apache.sling.scripting.sightly.impl.filter; |
| |
| import org.apache.sling.scripting.sightly.compiler.RuntimeFunction; |
| import org.apache.sling.scripting.sightly.impl.compiler.Syntax; |
| import org.apache.sling.scripting.sightly.compiler.expression.Expression; |
| import org.apache.sling.scripting.sightly.compiler.expression.ExpressionNode; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.RuntimeCall; |
| |
| /** |
| * XSS filter implementation. |
| */ |
| public class XSSFilter extends AbstractFilter { |
| |
| private static final class XSSFilterLoader { |
| private static final XSSFilter INSTANCE = new XSSFilter(); |
| } |
| |
| private XSSFilter() { |
| if (XSSFilterLoader.INSTANCE != null) { |
| throw new IllegalStateException("INSTANCE was already defined."); |
| } |
| priority = 110; |
| } |
| |
| public static XSSFilter getInstance() { |
| return XSSFilterLoader.INSTANCE; |
| } |
| |
| @Override |
| public Expression apply(Expression expression, ExpressionContext expressionContext) { |
| if (expressionContext == ExpressionContext.PLUGIN_DATA_SLY_USE || expressionContext == ExpressionContext.PLUGIN_DATA_SLY_TEMPLATE |
| || expressionContext == ExpressionContext.PLUGIN_DATA_SLY_CALL) { |
| return expression; |
| } |
| ExpressionNode context = expression.removeOption(Syntax.CONTEXT_OPTION); |
| if (context != null) { |
| return expression.withNode(new RuntimeCall(RuntimeFunction.XSS, expression.getRoot(), context)); |
| } |
| return expression; |
| } |
| |
| } |