121 lines
4.9 KiB
Java
121 lines
4.9 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.jasper.servlet;
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import java.io.IOException;
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import java.util.Set;
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import javax.servlet.ServletContainerInitializer;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletException;
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import javax.servlet.jsp.JspFactory;
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import org.apache.jasper.Constants;
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import org.apache.jasper.compiler.Localizer;
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import org.apache.jasper.compiler.TldCache;
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import org.apache.jasper.runtime.JspFactoryImpl;
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import org.apache.jasper.security.SecurityClassLoad;
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import org.apache.juli.logging.Log;
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import org.apache.juli.logging.LogFactory;
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import org.apache.tomcat.InstanceManager;
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import org.apache.tomcat.SimpleInstanceManager;
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import org.xml.sax.SAXException;
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/**
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* Initializer for the Jasper JSP Engine.
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*/
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public class JasperInitializer implements ServletContainerInitializer {
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private static final String MSG = "org.apache.jasper.servlet.JasperInitializer";
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private final Log log = LogFactory.getLog(JasperInitializer.class); // must not be static
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/**
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* Preload classes required at runtime by a JSP servlet so that
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* we don't get a defineClassInPackage security exception.
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*/
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static {
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JspFactoryImpl factory = new JspFactoryImpl();
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SecurityClassLoad.securityClassLoad(factory.getClass().getClassLoader());
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if( System.getSecurityManager() != null ) {
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String basePackage = "org.apache.jasper.";
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try {
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factory.getClass().getClassLoader().loadClass( basePackage +
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"runtime.JspFactoryImpl$PrivilegedGetPageContext");
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factory.getClass().getClassLoader().loadClass( basePackage +
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"runtime.JspFactoryImpl$PrivilegedReleasePageContext");
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factory.getClass().getClassLoader().loadClass( basePackage +
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"runtime.JspRuntimeLibrary");
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factory.getClass().getClassLoader().loadClass( basePackage +
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"runtime.ServletResponseWrapperInclude");
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factory.getClass().getClassLoader().loadClass( basePackage +
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"servlet.JspServletWrapper");
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} catch (ClassNotFoundException ex) {
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throw new IllegalStateException(ex);
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}
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}
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if (JspFactory.getDefaultFactory() == null) {
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JspFactory.setDefaultFactory(factory);
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}
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}
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@Override
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public void onStartup(Set<Class<?>> types, ServletContext context) throws ServletException {
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if (log.isDebugEnabled()) {
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log.debug(Localizer.getMessage(MSG + ".onStartup", context.getServletContextName()));
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}
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// Setup a simple default Instance Manager
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if (context.getAttribute(InstanceManager.class.getName())==null) {
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context.setAttribute(InstanceManager.class.getName(), new SimpleInstanceManager());
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}
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boolean validate = Boolean.parseBoolean(
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context.getInitParameter(Constants.XML_VALIDATION_TLD_INIT_PARAM));
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String blockExternalString = context.getInitParameter(
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Constants.XML_BLOCK_EXTERNAL_INIT_PARAM);
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boolean blockExternal;
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if (blockExternalString == null) {
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blockExternal = true;
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} else {
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blockExternal = Boolean.parseBoolean(blockExternalString);
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}
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// scan the application for TLDs
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TldScanner scanner = newTldScanner(context, true, validate, blockExternal);
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try {
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scanner.scan();
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} catch (IOException | SAXException e) {
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throw new ServletException(e);
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}
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// add any listeners defined in TLDs
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for (String listener : scanner.getListeners()) {
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context.addListener(listener);
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}
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context.setAttribute(TldCache.SERVLET_CONTEXT_ATTRIBUTE_NAME,
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new TldCache(context, scanner.getUriTldResourcePathMap(),
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scanner.getTldResourcePathTaglibXmlMap()));
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}
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protected TldScanner newTldScanner(ServletContext context, boolean namespaceAware,
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boolean validate, boolean blockExternal) {
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return new TldScanner(context, namespaceAware, validate, blockExternal);
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}
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}
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