javax.faces.webapp.FacesServlet Maven / Gradle / Ivy
/*
* $Id: FacesServlet.java,v 1.34 2007/07/16 17:06:42 rlubke Exp $
*/
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package javax.faces.webapp;
import javax.faces.FacesException;
import javax.faces.FactoryFinder;
import javax.faces.context.FacesContext;
import javax.faces.context.FacesContextFactory;
import javax.faces.lifecycle.Lifecycle;
import javax.faces.lifecycle.LifecycleFactory;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.UnavailableException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ResourceBundle;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* FacesServlet is a servlet that manages the request
* processing lifecycle for web applications that are utilizing JavaServer
* Faces to construct the user interface.
*/
public final class FacesServlet implements Servlet {
/**
* Context initialization parameter name for a comma delimited list
* of context-relative resource paths (in addition to
* /WEB-INF/faces-config.xml which is loaded automatically
* if it exists) containing JavaServer Faces configuration information.
*/
public static final String CONFIG_FILES_ATTR =
"javax.faces.CONFIG_FILES";
/**
* Context initialization parameter name for the lifecycle identifier
* of the {@link Lifecycle} instance to be utilized.
*/
public static final String LIFECYCLE_ID_ATTR =
"javax.faces.LIFECYCLE_ID";
/**
* The Logger for this class.
*/
private static final Logger LOGGER =
Logger.getLogger("javax.faces.webapp", "javax.faces.LogStrings");
/**
* Factory for {@link FacesContext} instances.
*/
private FacesContextFactory facesContextFactory = null;
/**
* The {@link Lifecycle} instance to use for request processing.
*/
private Lifecycle lifecycle = null;
/**
* The ServletConfig instance for this servlet.
*/
private ServletConfig servletConfig = null;
/**
* Release all resources acquired at startup time.
*/
public void destroy() {
facesContextFactory = null;
lifecycle = null;
servletConfig = null;
}
/**
* Return the ServletConfig instance for this servlet.
*/
public ServletConfig getServletConfig() {
return (this.servletConfig);
}
/**
* Return information about this Servlet.
*/
public String getServletInfo() {
return (this.getClass().getName());
}
/**
* Acquire the factory instances we will require.
*
* @throws ServletException if, for any reason, the startup of
* this Faces application failed. This includes errors in the
* config file that is parsed before or during the processing of
* this init() method.
*/
public void init(ServletConfig servletConfig) throws ServletException {
// Save our ServletConfig instance
this.servletConfig = servletConfig;
// Acquire our FacesContextFactory instance
try {
facesContextFactory = (FacesContextFactory)
FactoryFinder.getFactory
(FactoryFinder.FACES_CONTEXT_FACTORY);
} catch (FacesException e) {
ResourceBundle rb = LOGGER.getResourceBundle();
String msg = rb.getString("severe.webapp.facesservlet.init_failed");
Throwable rootCause = (e.getCause() != null) ? e.getCause() : e;
LOGGER.log(Level.SEVERE, msg, rootCause);
throw new UnavailableException(msg);
}
// Acquire our Lifecycle instance
try {
LifecycleFactory lifecycleFactory = (LifecycleFactory)
FactoryFinder.getFactory(FactoryFinder.LIFECYCLE_FACTORY);
String lifecycleId ;
// First look in the servlet init-param set
if (null == (lifecycleId = servletConfig.getInitParameter(LIFECYCLE_ID_ATTR))) {
// If not found, look in the context-param set
lifecycleId = servletConfig.getServletContext().getInitParameter
(LIFECYCLE_ID_ATTR);
}
if (lifecycleId == null) {
lifecycleId = LifecycleFactory.DEFAULT_LIFECYCLE;
}
lifecycle = lifecycleFactory.getLifecycle(lifecycleId);
} catch (FacesException e) {
Throwable rootCause = e.getCause();
if (rootCause == null) {
throw e;
} else {
throw new ServletException(e.getMessage(), rootCause);
}
}
}
/**
* Process an incoming request, and create the corresponding
* response, by executing the request processing lifecycle.
*
* If the request and response
* arguments to this method are not instances of
* HttpServletRequest and
* HttpServletResponse, respectively, the results of
* invoking this method are undefined.
*
* This method must respond to requests that start with the
* following strings by invoking the sendError method
* on the response argument (cast to
* HttpServletResponse), passing the code
* HttpServletResponse.SC_NOT_FOUND as the
* argument.
*
*
*
/WEB-INF/
/WEB-INF
/META-INF/
/META-INF
*
*
*
*
*
* @param request The servlet request we are processing
* @param response The servlet response we are creating
*
* @throws IOException if an input/output error occurs during processing
* @throws ServletException if a servlet error occurs during processing
*/
public void service(ServletRequest request,
ServletResponse response)
throws IOException, ServletException {
// If prefix mapped, then ensure requests for /WEB-INF are
// not processed.
String pathInfo = ((HttpServletRequest) request).getPathInfo();
if (pathInfo != null) {
pathInfo = pathInfo.toUpperCase();
if (pathInfo.startsWith("/WEB-INF/")
|| pathInfo.equals("/WEB-INF")
|| pathInfo.startsWith("/META-INF/")
|| pathInfo.equals("/META-INF")) {
((HttpServletResponse) response).
sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
}
// Acquire the FacesContext instance for this request
FacesContext context = facesContextFactory.getFacesContext
(servletConfig.getServletContext(), request, response, lifecycle);
// Execute the request processing lifecycle for this request
try {
lifecycle.execute(context);
lifecycle.render(context);
} catch (FacesException e) {
Throwable t = e.getCause();
if (t == null) {
throw new ServletException(e.getMessage(), e);
} else {
if (t instanceof ServletException) {
throw ((ServletException) t);
} else if (t instanceof IOException) {
throw ((IOException) t);
} else {
throw new ServletException(t.getMessage(), t);
}
}
}
finally {
// Release the FacesContext instance for this request
context.release();
}
}
}