/*
* 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.jasper.servlet;
import java.io.IOException;
import java.util.Set;
import javax.servlet.ServletContainerInitializer;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.jsp.JspFactory;
import org.apache.jasper.Constants;
import org.apache.jasper.compiler.Localizer;
import org.apache.jasper.compiler.TldCache;
import org.apache.jasper.runtime.JspFactoryImpl;
import org.apache.jasper.security.SecurityClassLoad;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.xml.sax.SAXException;
/**
* Initializer for the Jasper JSP Engine.
*/
public class JasperInitializer implements ServletContainerInitializer {
private static final String MSG = "org.apache.jasper.servlet.JasperInitializer";
private static final Log log = LogFactory.getLog(JasperInitializer.class);
/**
* Preload classes required at runtime by a JSP servlet so that
* we don't get a defineClassInPackage security exception.
*/
static {
JspFactoryImpl factory = new JspFactoryImpl();
SecurityClassLoad.securityClassLoad(factory.getClass().getClassLoader());
if( System.getSecurityManager() != null ) {
String basePackage = "org.apache.jasper.";
try {
factory.getClass().getClassLoader().loadClass( basePackage +
"runtime.JspFactoryImpl$PrivilegedGetPageContext");
factory.getClass().getClassLoader().loadClass( basePackage +
"runtime.JspFactoryImpl$PrivilegedReleasePageContext");
factory.getClass().getClassLoader().loadClass( basePackage +
"runtime.JspRuntimeLibrary");
factory.getClass().getClassLoader().loadClass( basePackage +
"runtime.JspRuntimeLibrary$PrivilegedIntrospectHelper");
factory.getClass().getClassLoader().loadClass( basePackage +
"runtime.ServletResponseWrapperInclude");
factory.getClass().getClassLoader().loadClass( basePackage +
"servlet.JspServletWrapper");
} catch (ClassNotFoundException ex) {
throw new IllegalStateException(ex);
}
}
// TODO we should play nice and only set this if it's null
JspFactory.setDefaultFactory(factory);
}
@Override
public void onStartup(Set<Class<?>> types, ServletContext context) throws ServletException {
if (log.isDebugEnabled()) {
log.debug(Localizer.getMessage(MSG + ".onStartup", context.getServletContextName()));
}
boolean validate = Boolean.parseBoolean(
context.getInitParameter(Constants.XML_VALIDATION_TLD_INIT_PARAM));
String blockExternalString = context.getInitParameter(
Constants.XML_BLOCK_EXTERNAL_INIT_PARAM);
boolean blockExternal;
if (blockExternalString == null) {
blockExternal = true;
} else {
blockExternal = Boolean.parseBoolean(blockExternalString);
}
// scan the application for TLDs
TldScanner scanner = new TldScanner(context, true, validate, blockExternal);
try {
scanner.scan();
} catch (IOException | SAXException e) {
throw new ServletException(e);
}
// add any listeners defined in TLDs
for (String listener : scanner.getListeners()) {
context.addListener(listener);
}
context.setAttribute(TldCache.SERVLET_CONTEXT_ATTRIBUTE_NAME,
new TldCache(context, scanner.getUriTldResourcePathMap(),
scanner.getTldResourcePathTaglibXmlMap()));
}
}