/*
* 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.wicket.request.resource;
import java.util.Locale;
import org.apache.wicket.Application;
import org.apache.wicket.javascript.IJavaScriptCompressor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Package resource for javascript files. It strips comments and whitespace from javascript.
*/
public class JavaScriptPackageResource extends PackageResource
{
private static final long serialVersionUID = 1L;
private static final Logger log = LoggerFactory.getLogger(JavaScriptPackageResource.class);
/**
* Construct.
*
* @param scope
* @param name
* @param locale
* @param style
* @param variation
*/
public JavaScriptPackageResource(Class<?> scope, String name, Locale locale, String style,
String variation)
{
super(scope, name, locale, style, variation);
}
@Override
protected byte[] processResponse(final Attributes attributes, byte[] bytes)
{
final byte[] processedResponse = super.processResponse(attributes, bytes);
IJavaScriptCompressor compressor = getCompressor();
if (compressor != null)
{
try
{
String nonCompressed = new String(processedResponse, "UTF-8");
return compressor.compress(nonCompressed).getBytes("UTF-8");
}
catch (Exception e)
{
log.error("Error while filtering content", e);
return processedResponse;
}
}
else
{
// don't strip the comments
return processedResponse;
}
}
/**
* Gets the {@link IJavaScriptCompressor} to be used. By default returns the configured
* compressor on application level, but can be overriden by the user application to provide
* compressor specific to the resource.
*
* @return the configured application level JavaScript compressor. May be {@code null}.
*/
protected IJavaScriptCompressor getCompressor()
{
IJavaScriptCompressor compressor = null;
if (Application.exists())
{
compressor = Application.get().getResourceSettings().getJavaScriptCompressor();
}
return compressor;
}
}