org.apache.catalina.connector.ResponseFacade Maven / Gradle / Ivy
/*
* 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.Collection;
import java.util.Locale;
import java.util.Map;
import java.util.function.Supplier;
import jakarta.servlet.ServletOutputStream;
import jakarta.servlet.http.Cookie;
import jakarta.servlet.http.HttpServletResponse;
import org.apache.catalina.Globals;
import org.apache.catalina.security.SecurityUtil;
import org.apache.tomcat.util.res.StringManager;
/**
* Facade class that wraps a Coyote response object. All methods are delegated to the wrapped response.
*
* @author Remy Maucherat
*/
public class ResponseFacade implements HttpServletResponse {
// ----------------------------------------------------------- DoPrivileged
private final class SetContentTypePrivilegedAction implements PrivilegedAction {
private final String contentType;
SetContentTypePrivilegedAction(String contentType) {
this.contentType = contentType;
}
@Override
public Void run() {
response.setContentType(contentType);
return null;
}
}
private final class DateHeaderPrivilegedAction implements PrivilegedAction {
private final String name;
private final long value;
private final boolean add;
DateHeaderPrivilegedAction(String name, long value, boolean add) {
this.name = name;
this.value = value;
this.add = add;
}
@Override
public Void run() {
if (add) {
response.addDateHeader(name, value);
} else {
response.setDateHeader(name, value);
}
return null;
}
}
private static class FlushBufferPrivilegedAction implements PrivilegedExceptionAction {
private final Response response;
FlushBufferPrivilegedAction(Response response) {
this.response = response;
}
@Override
public Void run() throws IOException {
response.setAppCommitted(true);
response.flushBuffer();
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 final StringManager sm = StringManager.getManager(ResponseFacade.class);
/**
* The wrapped response.
*/
protected Response response = null;
// --------------------------------------------------------- Public Methods
/**
* Clear facade.
*/
public void clear() {
response = null;
}
/**
* Prevent cloning the facade.
*/
@Override
protected Object clone() throws CloneNotSupportedException {
throw new CloneNotSupportedException();
}
public void finish() {
checkFacade();
response.setSuspended(true);
}
public boolean isFinished() {
checkFacade();
return response.isSuspended();
}
public long getContentWritten() {
checkFacade();
return response.getContentWritten();
}
// ------------------------------------------------ ServletResponse Methods
@Override
public String getCharacterEncoding() {
checkFacade();
return response.getCharacterEncoding();
}
@Override
public ServletOutputStream getOutputStream() throws IOException {
if (isFinished()) {
response.setSuspended(true);
}
return response.getOutputStream();
}
@Override
public PrintWriter getWriter() throws IOException {
if (isFinished()) {
response.setSuspended(true);
}
return response.getWriter();
}
@Override
public void setContentLength(int len) {
if (isCommitted()) {
return;
}
response.setContentLength(len);
}
@Override
public void setContentLengthLong(long length) {
if (isCommitted()) {
return;
}
response.setContentLengthLong(length);
}
@Override
public void setContentType(String type) {
if (isCommitted()) {
return;
}
if (SecurityUtil.isPackageProtectionEnabled()) {
AccessController.doPrivileged(new SetContentTypePrivilegedAction(type));
} else {
response.setContentType(type);
}
}
@Override
public void setBufferSize(int size) {
checkCommitted("coyoteResponse.setBufferSize.ise");
response.setBufferSize(size);
}
@Override
public int getBufferSize() {
checkFacade();
return response.getBufferSize();
}
@Override
public void flushBuffer() throws IOException {
if (isFinished()) {
return;
}
if (SecurityUtil.isPackageProtectionEnabled()) {
try {
AccessController.doPrivileged(new FlushBufferPrivilegedAction(response));
} catch (PrivilegedActionException e) {
Exception ex = e.getException();
if (ex instanceof IOException) {
throw (IOException) ex;
}
}
} else {
response.setAppCommitted(true);
response.flushBuffer();
}
}
@Override
public void resetBuffer() {
checkCommitted("coyoteResponse.resetBuffer.ise");
response.resetBuffer();
}
@Override
public boolean isCommitted() {
checkFacade();
return response.isAppCommitted();
}
@Override
public void reset() {
checkCommitted("coyoteResponse.reset.ise");
response.reset();
}
@Override
public void setLocale(Locale loc) {
if (isCommitted()) {
return;
}
response.setLocale(loc);
}
@Override
public Locale getLocale() {
checkFacade();
return response.getLocale();
}
@Override
public void addCookie(Cookie cookie) {
if (isCommitted()) {
return;
}
response.addCookie(cookie);
}
@Override
public boolean containsHeader(String name) {
checkFacade();
return response.containsHeader(name);
}
@Override
public String encodeURL(String url) {
checkFacade();
return response.encodeURL(url);
}
@Override
public String encodeRedirectURL(String url) {
checkFacade();
return response.encodeRedirectURL(url);
}
public void sendEarlyHints() {
response.sendEarlyHints();
}
/**
* {@inheritDoc}
*
* Calling sendError with a status code of 103 differs from the usual
* behavior. Sending 103 will trigger the container to send a "103 Early Hints" informational response including all
* current headers. The application can continue to use the request and response after calling sendError with a 103
* status code, including triggering a more typical response of any type.
*
* Starting with Tomcat 12, applications should use {@link #sendEarlyHints}.
*/
@Override
public void sendError(int sc, String msg) throws IOException {
checkCommitted("coyoteResponse.sendError.ise");
if (Response.SC_EARLY_HINTS == sc) {
sendEarlyHints();
} else {
response.setAppCommitted(true);
response.sendError(sc, msg);
}
}
/**
* {@inheritDoc}
*
* Calling sendError with a status code of 103 differs from the usual
* behavior. Sending 103 will trigger the container to send a "103 Early Hints" informational response including all
* current headers. The application can continue to use the request and response after calling sendError with a 103
* status code, including triggering a more typical response of any type.
*
* Starting with Tomcat 12, applications should use {@link #sendEarlyHints}.
*/
@Override
public void sendError(int sc) throws IOException {
checkCommitted("coyoteResponse.sendError.ise");
if (Response.SC_EARLY_HINTS == sc) {
sendEarlyHints();
} else {
response.setAppCommitted(true);
response.sendError(sc);
}
}
@Override
public void sendRedirect(String location) throws IOException {
checkCommitted("coyoteResponse.sendRedirect.ise");
response.setAppCommitted(true);
response.sendRedirect(location);
}
@Override
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);
}
}
@Override
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);
}
}
@Override
public void setHeader(String name, String value) {
if (isCommitted()) {
return;
}
response.setHeader(name, value);
}
@Override
public void addHeader(String name, String value) {
if (isCommitted()) {
return;
}
response.addHeader(name, value);
}
@Override
public void setIntHeader(String name, int value) {
if (isCommitted()) {
return;
}
response.setIntHeader(name, value);
}
@Override
public void addIntHeader(String name, int value) {
if (isCommitted()) {
return;
}
response.addIntHeader(name, value);
}
@Override
public void setStatus(int sc) {
if (isCommitted()) {
return;
}
response.setStatus(sc);
}
@Override
public String getContentType() {
checkFacade();
return response.getContentType();
}
@Override
public void setCharacterEncoding(String encoding) {
checkFacade();
response.setCharacterEncoding(encoding);
}
@Override
public int getStatus() {
checkFacade();
return response.getStatus();
}
@Override
public String getHeader(String name) {
checkFacade();
return response.getHeader(name);
}
@Override
public Collection getHeaderNames() {
checkFacade();
return response.getHeaderNames();
}
@Override
public Collection getHeaders(String name) {
checkFacade();
return response.getHeaders(name);
}
@Override
public void setTrailerFields(Supplier> supplier) {
checkFacade();
response.setTrailerFields(supplier);
}
@Override
public Supplier> getTrailerFields() {
checkFacade();
return response.getTrailerFields();
}
private void checkFacade() {
if (response == null) {
throw new IllegalStateException(sm.getString("responseFacade.nullResponse"));
}
}
private void checkCommitted(String messageKey) {
if (isCommitted()) {
throw new IllegalStateException(sm.getString(messageKey));
}
}
}