com.canoo.webtest.util.WebtestEmbeddingUtil.java Source code

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Here is the source code for com.canoo.webtest.util.WebtestEmbeddingUtil.java

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/*
 * Copyright 2001-2012 Remi Vankeisbelck
 *
 * Licensed 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 com.canoo.webtest.util;

import org.apache.commons.io.FileUtils;
import org.apache.commons.lang.StringUtils;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.URLDecoder;
import java.nio.charset.Charset;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

/**
 * This class provides utilities to work with WebTest without having the "normal" WebTest distribution but only the jar file(s).
 * @author Marc Guillemot
 */
public class WebtestEmbeddingUtil {
    /**
     * Copies WebTest resources (ie webtest.xml, tools/*, the XSLs, CSSs and pictures, ...) package in WebTest jar file
     * into the provide folder. Indeed different Ant tasks can't work with resources in a jar file.
     * @param targetFolder the folder in which resources should be copied to
     * @throws java.io.IOException if the resources can be accessed or copied
     */
    static void copyWebTestResources(final File targetFolder) throws IOException {
        final String resourcesPrefix = "com/canoo/webtest/resources/";
        final URL webtestXmlUrl = WebtestEmbeddingUtil.class.getClassLoader()
                .getResource(resourcesPrefix + "webtest.xml");

        if (webtestXmlUrl == null) {
            throw new IllegalStateException("Can't find resource " + resourcesPrefix + "webtest.xml");
        } else if (webtestXmlUrl.toString().startsWith("jar:file")) {
            final String urlJarFileName = webtestXmlUrl.toString().replaceFirst("^jar:file:([^\\!]*).*$", "$1");
            final String jarFileName = URLDecoder.decode(urlJarFileName, Charset.defaultCharset().name());
            final JarFile jarFile = new JarFile(jarFileName);
            final String urlPrefix = StringUtils.removeEnd(webtestXmlUrl.toString(), "webtest.xml");

            for (final Enumeration<JarEntry> entries = jarFile.entries(); entries.hasMoreElements();) {
                final JarEntry jarEntry = entries.nextElement();
                if (jarEntry.getName().startsWith(resourcesPrefix)) {
                    final String relativeName = StringUtils.removeStart(jarEntry.getName(), resourcesPrefix);
                    final URL url = new URL(urlPrefix + relativeName);
                    final File targetFile = new File(targetFolder, relativeName);
                    FileUtils.forceMkdir(targetFile.getParentFile());
                    FileUtils.copyURLToFile(url, targetFile);
                }
            }
        } else if (webtestXmlUrl.toString().startsWith("file:")) {
            // we're probably developing and/or have a custom version of the resources in classpath
            final File webtestXmlFile = FileUtils.toFile(webtestXmlUrl);
            final File resourceFolder = webtestXmlFile.getParentFile();

            FileUtils.copyDirectory(resourceFolder, targetFolder);
        } else {
            throw new IllegalStateException(
                    "Resource " + resourcesPrefix + "webtest.xml is not in a jar file: " + webtestXmlUrl);
        }
    }
}