001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.wicket.csp;
018
019import java.net.URI;
020import java.net.URISyntaxException;
021
022import org.apache.wicket.request.cycle.RequestCycle;
023import org.apache.wicket.util.lang.Args;
024
025/**
026 * A CSP value that renders an URI relative to the context root of the Wicket application.
027 * 
028 * @author papegaaij
029 */
030public class RelativeURICSPValue implements CSPRenderable
031{
032        private final String relativeUri;
033
034        /**
035         * Creates a new {@code RelativeURICSPValue} for the given relative URI.
036         * 
037         * @param relativeUri
038         *            The part of the URI relative to the context root of the Wicket application.
039         */
040        public RelativeURICSPValue(String relativeUri)
041        {
042                Args.notEmpty(relativeUri, "relativeUri");
043                this.relativeUri = relativeUri;
044        }
045
046        @Override
047        public String render(ContentSecurityPolicySettings settings, RequestCycle cycle)
048        {
049                return cycle.getUrlRenderer().renderContextRelativeUrl(relativeUri);
050        }
051
052        @Override
053        public void checkValidityForSrc()
054        {
055                try
056                {
057                        new URI("https://example.com/" + relativeUri);
058                }
059                catch (URISyntaxException urise)
060                {
061                        throw new IllegalArgumentException("Illegal relative URI", urise);
062                }
063        }
064
065        @Override
066        public String toString()
067        {
068                return relativeUri;
069        }
070}