org.apache.geode.management.internal.configuration.utils.DtdResolver.java Source code

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Here is the source code for org.apache.geode.management.internal.configuration.utils.DtdResolver.java

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/*
 * 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.geode.management.internal.configuration.utils;

import org.apache.geode.distributed.internal.DistributionConfig;
import org.apache.geode.internal.cache.xmlcache.CacheXml;
import org.apache.commons.io.FileUtils;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;

import java.io.File;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

/******
 * This class is used to resolve the location of DTD. During development time the dtd for the latest
 * version is not published on the www.gemstone.com , then the dtd should be picked up as a resource
 * from the Jar file.
 *
 * @deprecated As of 8.1 use {@link CacheXml}
 */
@Deprecated
public class DtdResolver implements EntityResolver {

    @Deprecated
    public InputSource resolveEntity(String publicId, String systemId) throws IOException {
        if (!isHttpUrlOK(systemId)) {
            URL dtdURL = getClass().getResource(CacheXml.LATEST_DTD_LOCATION);
            File dtd = new File(DistributionConfig.GEMFIRE_PREFIX + "dtd");
            FileUtils.copyURLToFile(dtdURL, dtd);
            InputSource inputSource = new InputSource(FileUtils.openInputStream(dtd));
            FileUtils.deleteQuietly(dtd);
            return inputSource;
        } else {
            return null;
        }
    }

    /****
     * Checks if the url passed , can be contacted or not.
     * 
     * @param urlString
     * @return true if the URL is up and can be contacted.
     */
    @Deprecated
    public boolean isHttpUrlOK(String urlString) {
        try {
            URL e = new URL(urlString);
            HttpURLConnection urlConnection = (HttpURLConnection) e.openConnection();
            urlConnection.setRequestMethod("HEAD");
            int responseCode = urlConnection.getResponseCode();
            if (responseCode == 200) {
                return true;
            } else {
                return false;
            }
        } catch (Exception e) {
            return false;
        }
    }

    /***
     * Gets the URL for Cache dtd
     * 
     * @return dtd url as string
     * @throws MalformedURLException
     */
    @Deprecated
    public URL getDtdUrl() throws MalformedURLException {
        if (isHttpUrlOK(CacheXml.LATEST_SYSTEM_ID)) {
            return new URL(CacheXml.LATEST_SYSTEM_ID);
        } else {
            URL dtdURL = getClass().getResource(CacheXml.LATEST_DTD_LOCATION);
            return dtdURL;
        }
    }
}