/*
* Copyright 2015 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*
* 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.dashbuilder.displayer.client;
import org.dashbuilder.common.client.StringUtils;
import org.dashbuilder.displayer.client.resources.i18n.DisplayerConstants;
public class DisplayerGwtExprEval implements AbstractDisplayer.ExpressionEval {
public static final String[] _jsMalicious = {"document.", "window.", "alert(", "eval(", ".innerHTML"};
AbstractDisplayer presenter = null;
public DisplayerGwtExprEval(AbstractDisplayer presenter) {
this.presenter = presenter;
}
@Override
public String evalExpression(String val, String expr) {
if (StringUtils.isBlank(expr)) {
return val;
}
for (String keyword : _jsMalicious) {
if (expr.contains(keyword)) {
presenter.handleError(DisplayerConstants.INSTANCE.displayer_keyword_not_allowed(expr));
throw new RuntimeException(DisplayerConstants.INSTANCE.displayer_keyword_not_allowed(expr));
}
}
try {
return _evalExpression(val, expr);
} catch (Exception e) {
presenter.handleError(DisplayerConstants.INSTANCE.displayer_expr_invalid_syntax(expr), e);
throw new RuntimeException(DisplayerConstants.INSTANCE.displayer_expr_invalid_syntax(expr));
}
}
protected native String _evalExpression(String val, String expr) /*-{
value = val;
return eval(expr) + '';
}-*/;
}