Tomcat example source code file (ResponseFacade.java)
The Tomcat ResponseFacade.java source code
/*
* 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.catalina.connector;
import java.io.IOException;
import java.io.PrintWriter;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.Locale;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import org.apache.catalina.Globals;
import org.apache.catalina.util.StringManager;
import org.apache.catalina.security.SecurityUtil;
/**
* Facade class that wraps a Coyote response object.
* All methods are delegated to the wrapped response.
*
* @author Remy Maucherat
* @author Jean-Francois Arcand
* @version $Revision: 505593 $ $Date: 2007-02-10 01:54:56 +0100 (sam., 10 févr. 2007) $
*/
@SuppressWarnings("deprecation")
public class ResponseFacade
implements HttpServletResponse {
// ----------------------------------------------------------- DoPrivileged
private final class SetContentTypePrivilegedAction
implements PrivilegedAction {
private String contentType;
public SetContentTypePrivilegedAction(String contentType){
this.contentType = contentType;
}
public Object run() {
response.setContentType(contentType);
return null;
}
}
private final class DateHeaderPrivilegedAction
implements PrivilegedAction {
private String name;
private long value;
private boolean add;
DateHeaderPrivilegedAction(String name, long value, boolean add) {
this.name = name;
this.value = value;
this.add = add;
}
public Object run() {
if(add) {
response.addDateHeader(name, value);
} else {
response.setDateHeader(name, value);
}
return null;
}
}
// ----------------------------------------------------------- Constructors
/**
* Construct a wrapper for the specified response.
*
* @param response The response to be wrapped
*/
public ResponseFacade(Response response) {
this.response = response;
}
// ----------------------------------------------- Class/Instance Variables
/**
* The string manager for this package.
*/
protected static StringManager sm =
StringManager.getManager(Constants.Package);
/**
* The wrapped response.
*/
protected Response response = null;
// --------------------------------------------------------- Public Methods
/**
* Clear facade.
*/
public void clear() {
response = null;
}
/**
* Prevent cloning the facade.
*/
protected Object clone()
throws CloneNotSupportedException {
throw new CloneNotSupportedException();
}
public void finish() {
if (response == null) {
throw new IllegalStateException(
sm.getString("responseFacade.nullResponse"));
}
response.setSuspended(true);
}
public boolean isFinished() {
if (response == null) {
throw new IllegalStateException(
sm.getString("responseFacade.nullResponse"));
}
return response.isSuspended();
}
// ------------------------------------------------ ServletResponse Methods
public String getCharacterEncoding() {
if (response == null) {
throw new IllegalStateException(
sm.getString("responseFacade.nullResponse"));
}
return response.getCharacterEncoding();
}
public ServletOutputStream getOutputStream()
throws IOException {
// if (isFinished())
// throw new IllegalStateException
// (/*sm.getString("responseFacade.finished")*/);
ServletOutputStream sos = response.getOutputStream();
if (isFinished())
response.setSuspended(true);
return (sos);
}
public PrintWriter getWriter()
throws IOException {
// if (isFinished())
// throw new IllegalStateException
// (/*sm.getString("responseFacade.finished")*/);
PrintWriter writer = response.getWriter();
if (isFinished())
response.setSuspended(true);
return (writer);
}
public void setContentLength(int len) {
if (isCommitted())
return;
response.setContentLength(len);
}
public void setContentType(String type) {
if (isCommitted())
return;
if (SecurityUtil.isPackageProtectionEnabled()){
AccessController.doPrivileged(new SetContentTypePrivilegedAction(type));
} else {
response.setContentType(type);
}
}
public void setBufferSize(int size) {
if (isCommitted())
throw new IllegalStateException
(/*sm.getString("responseBase.reset.ise")*/);
response.setBufferSize(size);
}
public int getBufferSize() {
if (response == null) {
throw new IllegalStateException(
sm.getString("responseFacade.nullResponse"));
}
return response.getBufferSize();
}
public void flushBuffer()
throws IOException {
if (isFinished())
// throw new IllegalStateException
// (/*sm.getString("responseFacade.finished")*/);
return;
if (SecurityUtil.isPackageProtectionEnabled()){
try{
AccessController.doPrivileged(new PrivilegedExceptionAction(){
public Object run() throws IOException{
response.setAppCommitted(true);
response.flushBuffer();
return null;
}
});
} catch(PrivilegedActionException e){
Exception ex = e.getException();
if (ex instanceof IOException){
throw (IOException)ex;
}
}
} else {
response.setAppCommitted(true);
response.flushBuffer();
}
}
public void resetBuffer() {
if (isCommitted())
throw new IllegalStateException
(/*sm.getString("responseBase.reset.ise")*/);
response.resetBuffer();
}
public boolean isCommitted() {
if (response == null) {
throw new IllegalStateException(
sm.getString("responseFacade.nullResponse"));
}
return (response.isAppCommitted());
}
public void reset() {
if (isCommitted())
throw new IllegalStateException
(/*sm.getString("responseBase.reset.ise")*/);
response.reset();
}
public void setLocale(Locale loc) {
if (isCommitted())
return;
response.setLocale(loc);
}
public Locale getLocale() {
if (response == null) {
throw new IllegalStateException(
sm.getString("responseFacade.nullResponse"));
}
return response.getLocale();
}
public void addCookie(Cookie cookie) {
if (isCommitted())
return;
response.addCookie(cookie);
}
public boolean containsHeader(String name) {
if (response == null) {
throw new IllegalStateException(
sm.getString("responseFacade.nullResponse"));
}
return response.containsHeader(name);
}
public String encodeURL(String url) {
if (response == null) {
throw new IllegalStateException(
sm.getString("responseFacade.nullResponse"));
}
return response.encodeURL(url);
}
public String encodeRedirectURL(String url) {
if (response == null) {
throw new IllegalStateException(
sm.getString("responseFacade.nullResponse"));
}
return response.encodeRedirectURL(url);
}
public String encodeUrl(String url) {
if (response == null) {
throw new IllegalStateException(
sm.getString("responseFacade.nullResponse"));
}
return response.encodeURL(url);
}
public String encodeRedirectUrl(String url) {
if (response == null) {
throw new IllegalStateException(
sm.getString("responseFacade.nullResponse"));
}
return response.encodeRedirectURL(url);
}
public void sendError(int sc, String msg)
throws IOException {
if (isCommitted())
throw new IllegalStateException
(/*sm.getString("responseBase.reset.ise")*/);
response.setAppCommitted(true);
response.sendError(sc, msg);
}
public void sendError(int sc)
throws IOException {
if (isCommitted())
throw new IllegalStateException
(/*sm.getString("responseBase.reset.ise")*/);
response.setAppCommitted(true);
response.sendError(sc);
}
public void sendRedirect(String location)
throws IOException {
if (isCommitted())
throw new IllegalStateException
(/*sm.getString("responseBase.reset.ise")*/);
response.setAppCommitted(true);
response.sendRedirect(location);
}
public void setDateHeader(String name, long date) {
if (isCommitted())
return;
if(Globals.IS_SECURITY_ENABLED) {
AccessController.doPrivileged(new DateHeaderPrivilegedAction
(name, date, false));
} else {
response.setDateHeader(name, date);
}
}
public void addDateHeader(String name, long date) {
if (isCommitted())
return;
if(Globals.IS_SECURITY_ENABLED) {
AccessController.doPrivileged(new DateHeaderPrivilegedAction
(name, date, true));
} else {
response.addDateHeader(name, date);
}
}
public void setHeader(String name, String value) {
if (isCommitted())
return;
response.setHeader(name, value);
}
public void addHeader(String name, String value) {
if (isCommitted())
return;
response.addHeader(name, value);
}
public void setIntHeader(String name, int value) {
if (isCommitted())
return;
response.setIntHeader(name, value);
}
public void addIntHeader(String name, int value) {
if (isCommitted())
return;
response.addIntHeader(name, value);
}
public void setStatus(int sc) {
if (isCommitted())
return;
response.setStatus(sc);
}
public void setStatus(int sc, String sm) {
if (isCommitted())
return;
response.setStatus(sc, sm);
}
public String getContentType() {
if (response == null) {
throw new IllegalStateException(
sm.getString("responseFacade.nullResponse"));
}
return response.getContentType();
}
public void setCharacterEncoding(String arg0) {
if (response == null) {
throw new IllegalStateException(
sm.getString("responseFacade.nullResponse"));
}
response.setCharacterEncoding(arg0);
}
}
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