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/*
* 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.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.charset.Charset;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Enumeration;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.function.Supplier;
import jakarta.servlet.ServletOutputStream;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.SessionTrackingMode;
import jakarta.servlet.http.Cookie;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpServletResponseWrapper;
import org.apache.catalina.Context;
import org.apache.catalina.Session;
import org.apache.catalina.security.SecurityUtil;
import org.apache.catalina.util.SessionConfig;
import org.apache.coyote.ActionCode;
import org.apache.coyote.ContinueResponseTiming;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.buf.CharChunk;
import org.apache.tomcat.util.buf.UEncoder;
import org.apache.tomcat.util.buf.UEncoder.SafeCharsSet;
import org.apache.tomcat.util.buf.UriUtil;
import org.apache.tomcat.util.http.FastHttpDateFormat;
import org.apache.tomcat.util.http.MimeHeaders;
import org.apache.tomcat.util.http.parser.MediaTypeCache;
import org.apache.tomcat.util.res.StringManager;
import org.apache.tomcat.util.security.Escape;
/**
* Wrapper object for the Coyote response.
*
* @author Remy Maucherat
* @author Craig R. McClanahan
*/
public class Response implements HttpServletResponse {
private static final Log log = LogFactory.getLog(Response.class);
protected static final StringManager sm = StringManager.getManager(Response.class);
private static final MediaTypeCache MEDIA_TYPE_CACHE = new MediaTypeCache(100);
// ----------------------------------------------------- Instance Variables
public Response() {
this(OutputBuffer.DEFAULT_BUFFER_SIZE);
}
public Response(int outputBufferSize) {
outputBuffer = new OutputBuffer(outputBufferSize);
}
// ------------------------------------------------------------- Properties
/**
* Coyote response.
*/
protected org.apache.coyote.Response coyoteResponse;
/**
* Set the Coyote response.
*
* @param coyoteResponse The Coyote response
*/
public void setCoyoteResponse(org.apache.coyote.Response coyoteResponse) {
this.coyoteResponse = coyoteResponse;
outputBuffer.setResponse(coyoteResponse);
}
/**
* @return the Coyote response.
*/
public org.apache.coyote.Response getCoyoteResponse() {
return this.coyoteResponse;
}
/**
* @return the Context within which this Request is being processed.
*/
public Context getContext() {
return request.getContext();
}
/**
* The associated output buffer.
*/
protected final OutputBuffer outputBuffer;
/**
* The associated output stream.
*/
protected CoyoteOutputStream outputStream;
/**
* The associated writer.
*/
protected CoyoteWriter writer;
/**
* The application commit flag.
*/
protected boolean appCommitted = false;
/**
* The included flag.
*/
protected boolean included = false;
/**
* The characterEncoding flag
*/
private boolean isCharacterEncodingSet = false;
/**
* Using output stream flag.
*/
protected boolean usingOutputStream = false;
/**
* Using writer flag.
*/
protected boolean usingWriter = false;
/**
* URL encoder.
*/
protected final UEncoder urlEncoder = new UEncoder(SafeCharsSet.WITH_SLASH);
/**
* Recyclable buffer to hold the redirect URL.
*/
protected final CharChunk redirectURLCC = new CharChunk();
/*
* Not strictly required but it makes generating HTTP/2 push requests a lot
* easier if these are retained until the response is recycled.
*/
private final List cookies = new ArrayList<>();
private HttpServletResponse applicationResponse = null;
// --------------------------------------------------------- Public Methods
/**
* Release all object references, and initialize instance variables, in
* preparation for reuse of this object.
*/
public void recycle() {
cookies.clear();
outputBuffer.recycle();
usingOutputStream = false;
usingWriter = false;
appCommitted = false;
included = false;
isCharacterEncodingSet = false;
applicationResponse = null;
if (getRequest().getDiscardFacades()) {
if (facade != null) {
facade.clear();
facade = null;
}
if (outputStream != null) {
outputStream.clear();
outputStream = null;
}
if (writer != null) {
writer.clear();
writer = null;
}
} else if (writer != null) {
writer.recycle();
}
}
public List getCookies() {
return cookies;
}
// ------------------------------------------------------- Response Methods
/**
* @return the number of bytes the application has actually written to the
* output stream. This excludes chunking, compression, etc. as well as
* headers.
*/
public long getContentWritten() {
return outputBuffer.getContentWritten();
}
/**
* @return the number of bytes the actually written to the socket. This
* includes chunking, compression, etc. but excludes headers.
* @param flush if true will perform a buffer flush first
*/
public long getBytesWritten(boolean flush) {
if (flush) {
try {
outputBuffer.flush();
} catch (IOException ioe) {
// Ignore - the client has probably closed the connection
}
}
return getCoyoteResponse().getBytesWritten(flush);
}
/**
* Set the application commit flag.
*
* @param appCommitted The new application committed flag value
*/
public void setAppCommitted(boolean appCommitted) {
this.appCommitted = appCommitted;
}
/**
* Application commit flag accessor.
*
* @return true if the application has committed the response
*/
public boolean isAppCommitted() {
return this.appCommitted || isCommitted() || isSuspended()
|| ((getContentLength() > 0)
&& (getContentWritten() >= getContentLength()));
}
/**
* The request with which this response is associated.
*/
protected Request request = null;
/**
* @return the Request with which this Response is associated.
*/
public org.apache.catalina.connector.Request getRequest() {
return this.request;
}
/**
* Set the Request with which this Response is associated.
*
* @param request The new associated request
*/
public void setRequest(org.apache.catalina.connector.Request request) {
this.request = request;
}
/**
* The facade associated with this response.
*/
protected ResponseFacade facade = null;
/**
* @return the ServletResponse for which this object
* is the facade.
*/
public HttpServletResponse getResponse() {
if (facade == null) {
facade = new ResponseFacade(this);
}
if (applicationResponse == null) {
applicationResponse = facade;
}
return applicationResponse;
}
/**
* Set a wrapped HttpServletResponse to pass to the application. Components
* wishing to wrap the response should obtain the response via
* {@link #getResponse()}, wrap it and then call this method with the
* wrapped response.
*
* @param applicationResponse The wrapped response to pass to the
* application
*/
public void setResponse(HttpServletResponse applicationResponse) {
// Check the wrapper wraps this request
ServletResponse r = applicationResponse;
while (r instanceof HttpServletResponseWrapper) {
r = ((HttpServletResponseWrapper) r).getResponse();
}
if (r != facade) {
throw new IllegalArgumentException(sm.getString("response.illegalWrap"));
}
this.applicationResponse = applicationResponse;
}
/**
* Set the suspended flag.
*
* @param suspended The new suspended flag value
*/
public void setSuspended(boolean suspended) {
outputBuffer.setSuspended(suspended);
}
/**
* Suspended flag accessor.
*
* @return true if the response is suspended
*/
public boolean isSuspended() {
return outputBuffer.isSuspended();
}
/**
* Closed flag accessor.
*
* @return true if the response has been closed
*/
public boolean isClosed() {
return outputBuffer.isClosed();
}
/**
* Set the error flag.
*
* @return false if the error flag was already set
*/
public boolean setError() {
return getCoyoteResponse().setError();
}
/**
* Error flag accessor.
*
* @return true if the response has encountered an error
*/
public boolean isError() {
return getCoyoteResponse().isError();
}
public boolean isErrorReportRequired() {
return getCoyoteResponse().isErrorReportRequired();
}
public boolean setErrorReported() {
return getCoyoteResponse().setErrorReported();
}
/**
* Perform whatever actions are required to flush and close the output
* stream or writer, in a single operation.
*
* @exception IOException if an input/output error occurs
*/
public void finishResponse() throws IOException {
// Writing leftover bytes
outputBuffer.close();
}
/**
* @return the content length that was set or calculated for this Response.
*/
public int getContentLength() {
return getCoyoteResponse().getContentLength();
}
/**
* @return the content type that was set or calculated for this response,
* or null if no content type was set.
*/
@Override
public String getContentType() {
return getCoyoteResponse().getContentType();
}
/**
* Return a PrintWriter that can be used to render error messages,
* regardless of whether a stream or writer has already been acquired.
*
* @return Writer which can be used for error reports. If the response is
* not an error report returned using sendError or triggered by an
* unexpected exception thrown during the servlet processing
* (and only in that case), null will be returned if the response stream
* has already been used.
*
* @exception IOException if an input/output error occurs
*/
public PrintWriter getReporter() throws IOException {
if (outputBuffer.isNew()) {
outputBuffer.checkConverter();
if (writer == null) {
writer = new CoyoteWriter(outputBuffer);
}
return writer;
} else {
return null;
}
}
// ------------------------------------------------ ServletResponse Methods
/**
* Flush the buffer and commit this response.
*
* @exception IOException if an input/output error occurs
*/
@Override
public void flushBuffer() throws IOException {
outputBuffer.flush();
}
/**
* @return the actual buffer size used for this Response.
*/
@Override
public int getBufferSize() {
return outputBuffer.getBufferSize();
}
/**
* @return the character encoding used for this Response.
*/
@Override
public String getCharacterEncoding() {
String charset = getCoyoteResponse().getCharacterEncoding();
if (charset != null) {
return charset;
}
Context context = getContext();
String result = null;
if (context != null) {
result = context.getResponseCharacterEncoding();
}
if (result == null) {
result = org.apache.coyote.Constants.DEFAULT_BODY_CHARSET.name();
}
return result;
}
/**
* @return the servlet output stream associated with this Response.
*
* @exception IllegalStateException if getWriter has
* already been called for this response
* @exception IOException if an input/output error occurs
*/
@Override
public ServletOutputStream getOutputStream()
throws IOException {
if (usingWriter) {
throw new IllegalStateException
(sm.getString("coyoteResponse.getOutputStream.ise"));
}
usingOutputStream = true;
if (outputStream == null) {
outputStream = new CoyoteOutputStream(outputBuffer);
}
return outputStream;
}
/**
* @return the Locale assigned to this response.
*/
@Override
public Locale getLocale() {
return getCoyoteResponse().getLocale();
}
/**
* @return the writer associated with this Response.
*
* @exception IllegalStateException if getOutputStream has
* already been called for this response
* @exception IOException if an input/output error occurs
*/
@Override
public PrintWriter getWriter()
throws IOException {
if (usingOutputStream) {
throw new IllegalStateException
(sm.getString("coyoteResponse.getWriter.ise"));
}
if (request.getConnector().getEnforceEncodingInGetWriter()) {
/*
* If the response's character encoding has not been specified as
* described in getCharacterEncoding (i.e., the method
* just returns the default value ISO-8859-1),
* getWriter updates it to ISO-8859-1
* (with the effect that a subsequent call to getContentType() will
* include a charset=ISO-8859-1 component which will also be
* reflected in the Content-Type response header, thereby satisfying
* the Servlet spec requirement that containers must communicate the
* character encoding used for the servlet response's writer to the
* client).
*/
setCharacterEncoding(getCharacterEncoding());
}
usingWriter = true;
outputBuffer.checkConverter();
if (writer == null) {
writer = new CoyoteWriter(outputBuffer);
}
return writer;
}
/**
* Has the output of this response already been committed?
*
* @return true if the response has been committed
*/
@Override
public boolean isCommitted() {
return getCoyoteResponse().isCommitted();
}
/**
* Clear any content written to the buffer.
*
* @exception IllegalStateException if this response has already
* been committed
*/
@Override
public void reset() {
// Ignore any call from an included servlet
if (included) {
return;
}
getCoyoteResponse().reset();
outputBuffer.reset();
usingOutputStream = false;
usingWriter = false;
isCharacterEncodingSet = false;
}
/**
* Reset the data buffer but not any status or header information.
*
* @exception IllegalStateException if the response has already
* been committed
*/
@Override
public void resetBuffer() {
resetBuffer(false);
}
/**
* Reset the data buffer and the using Writer/Stream flags but not any
* status or header information.
*
* @param resetWriterStreamFlags true if the internal
* usingWriter, usingOutputStream,
* isCharacterEncodingSet flags should also be reset
*
* @exception IllegalStateException if the response has already
* been committed
*/
public void resetBuffer(boolean resetWriterStreamFlags) {
if (isCommitted()) {
throw new IllegalStateException
(sm.getString("coyoteResponse.resetBuffer.ise"));
}
outputBuffer.reset(resetWriterStreamFlags);
if(resetWriterStreamFlags) {
usingOutputStream = false;
usingWriter = false;
isCharacterEncodingSet = false;
}
}
/**
* Set the buffer size to be used for this Response.
*
* @param size The new buffer size
*
* @exception IllegalStateException if this method is called after
* output has been committed for this response
*/
@Override
public void setBufferSize(int size) {
if (isCommitted() || !outputBuffer.isNew()) {
throw new IllegalStateException
(sm.getString("coyoteResponse.setBufferSize.ise"));
}
outputBuffer.setBufferSize(size);
}
/**
* Set the content length (in bytes) for this Response.
*
* @param length The new content length
*/
@Override
public void setContentLength(int length) {
setContentLengthLong(length);
}
@Override
public void setContentLengthLong(long length) {
if (isCommitted()) {
return;
}
// Ignore any call from an included servlet
if (included) {
return;
}
getCoyoteResponse().setContentLength(length);
}
/**
* Set the content type for this Response.
*
* @param type The new content type
*/
@Override
public void setContentType(String type) {
if (isCommitted()) {
return;
}
// Ignore any call from an included servlet
if (included) {
return;
}
if (type == null) {
getCoyoteResponse().setContentType(null);
try {
getCoyoteResponse().setCharacterEncoding(null);
} catch (UnsupportedEncodingException e) {
// Can never happen when calling with null
}
isCharacterEncodingSet = false;
return;
}
String[] m = MEDIA_TYPE_CACHE.parse(type);
if (m == null) {
// Invalid - Assume no charset and just pass through whatever
// the user provided.
getCoyoteResponse().setContentTypeNoCharset(type);
return;
}
if (m[1] == null) {
// No charset and we know value is valid as cache lookup was
// successful
// Pass-through user provided value in case user-agent is buggy and
// requires specific format
getCoyoteResponse().setContentTypeNoCharset(type);
} else {
// There is a charset so have to rebuild content-type without it
getCoyoteResponse().setContentTypeNoCharset(m[0]);
// Ignore charset if getWriter() has already been called
if (!usingWriter) {
try {
getCoyoteResponse().setCharacterEncoding(m[1]);
} catch (UnsupportedEncodingException e) {
log.warn(sm.getString("coyoteResponse.encoding.invalid", m[1]), e);
}
isCharacterEncodingSet = true;
}
}
}
/**
* Overrides the name of the character encoding used in the body
* of the request. This method must be called prior to reading
* request parameters or reading input using getReader().
*
* @param charset String containing the name of the character encoding.
*/
@Override
public void setCharacterEncoding(String charset) {
if (isCommitted()) {
return;
}
// Ignore any call from an included servlet
if (included) {
return;
}
// Ignore any call made after the getWriter has been invoked
// The default should be used
if (usingWriter) {
return;
}
try {
getCoyoteResponse().setCharacterEncoding(charset);
} catch (UnsupportedEncodingException e) {
log.warn(sm.getString("coyoteResponse.encoding.invalid", charset), e);
return;
}
if (charset == null) {
isCharacterEncodingSet = false;
} else {
isCharacterEncodingSet = true;
}
}
/**
* Set the Locale that is appropriate for this response, including
* setting the appropriate character encoding.
*
* @param locale The new locale
*/
@Override
public void setLocale(Locale locale) {
if (isCommitted()) {
return;
}
// Ignore any call from an included servlet
if (included) {
return;
}
getCoyoteResponse().setLocale(locale);
// Ignore any call made after the getWriter has been invoked.
// The default should be used
if (usingWriter) {
return;
}
if (isCharacterEncodingSet) {
return;
}
if (locale == null) {
try {
getCoyoteResponse().setCharacterEncoding(null);
} catch (UnsupportedEncodingException e) {
// Impossible when calling with null
}
} else {
// In some error handling scenarios, the context is unknown
// (e.g. a 404 when a ROOT context is not present)
Context context = getContext();
if (context != null) {
String charset = context.getCharset(locale);
if (charset != null) {
try {
getCoyoteResponse().setCharacterEncoding(charset);
} catch (UnsupportedEncodingException e) {
log.warn(sm.getString("coyoteResponse.encoding.invalid", charset), e);
}
}
}
}
}
// --------------------------------------------------- HttpResponse Methods
@Override
public String getHeader(String name) {
return getCoyoteResponse().getMimeHeaders().getHeader(name);
}
@Override
public Collection getHeaderNames() {
MimeHeaders headers = getCoyoteResponse().getMimeHeaders();
int n = headers.size();
List result = new ArrayList<>(n);
for (int i = 0; i < n; i++) {
result.add(headers.getName(i).toString());
}
return result;
}
@Override
public Collection getHeaders(String name) {
Enumeration enumeration = getCoyoteResponse().getMimeHeaders().values(name);
Set result = new LinkedHashSet<>();
while (enumeration.hasMoreElements()) {
result.add(enumeration.nextElement());
}
return result;
}
/**
* @return the error message that was set with sendError()
* for this Response.
*/
public String getMessage() {
return getCoyoteResponse().getMessage();
}
@Override
public int getStatus() {
return getCoyoteResponse().getStatus();
}
// -------------------------------------------- HttpServletResponse Methods
/**
* Add the specified Cookie to those that will be included with
* this Response.
*
* @param cookie Cookie to be added
*/
@Override
public void addCookie(final Cookie cookie) {
// Ignore any call from an included servlet
if (included || isCommitted()) {
return;
}
cookies.add(cookie);
String header = generateCookieString(cookie);
//if we reached here, no exception, cookie is valid
addHeader("Set-Cookie", header, getContext().getCookieProcessor().getCharset());
}
/**
* Special method for adding a session cookie as we should be overriding
* any previous.
*
* @param cookie The new session cookie to add the response
*/
public void addSessionCookieInternal(final Cookie cookie) {
if (isCommitted()) {
return;
}
String name = cookie.getName();
final String headername = "Set-Cookie";
final String startsWith = name + "=";
String header = generateCookieString(cookie);
boolean set = false;
MimeHeaders headers = getCoyoteResponse().getMimeHeaders();
int n = headers.size();
for (int i = 0; i < n; i++) {
if (headers.getName(i).toString().equals(headername)) {
if (headers.getValue(i).toString().startsWith(startsWith)) {
headers.getValue(i).setString(header);
set = true;
}
}
}
if (!set) {
addHeader(headername, header);
}
}
public String generateCookieString(final Cookie cookie) {
// Web application code can receive a IllegalArgumentException
// from the generateHeader() invocation
if (SecurityUtil.isPackageProtectionEnabled()) {
return AccessController.doPrivileged(
new PrivilegedGenerateCookieString(getContext(), cookie, request.getRequest()));
} else {
return getContext().getCookieProcessor().generateHeader(cookie, request.getRequest());
}
}
/**
* Add the specified date header to the specified value.
*
* @param name Name of the header to set
* @param value Date value to be set
*/
@Override
public void addDateHeader(String name, long value) {
if (name == null || name.length() == 0) {
return;
}
if (isCommitted()) {
return;
}
// Ignore any call from an included servlet
if (included) {
return;
}
addHeader(name, FastHttpDateFormat.formatDate(value));
}
/**
* Add the specified header to the specified value.
*
* @param name Name of the header to set
* @param value Value to be set
*/
@Override
public void addHeader(String name, String value) {
addHeader(name, value, null);
}
private void addHeader(String name, String value, Charset charset) {
if (name == null || name.length() == 0 || value == null) {
return;
}
if (isCommitted()) {
return;
}
// Ignore any call from an included servlet
if (included) {
return;
}
char cc=name.charAt(0);
if (cc=='C' || cc=='c') {
if (checkSpecialHeader(name, value)) {
return;
}
}
getCoyoteResponse().addHeader(name, value, charset);
}
/**
* An extended version of this exists in {@link org.apache.coyote.Response}.
* This check is required here to ensure that the usingWriter check in
* {@link #setContentType(String)} is applied since usingWriter is not
* visible to {@link org.apache.coyote.Response}
*
* Called from set/addHeader.
* @return true if the header is special, no need to set the header.
*/
private boolean checkSpecialHeader(String name, String value) {
if (name.equalsIgnoreCase("Content-Type")) {
setContentType(value);
return true;
}
return false;
}
/**
* Add the specified integer header to the specified value.
*
* @param name Name of the header to set
* @param value Integer value to be set
*/
@Override
public void addIntHeader(String name, int value) {
if (name == null || name.length() == 0) {
return;
}
if (isCommitted()) {
return;
}
// Ignore any call from an included servlet
if (included) {
return;
}
addHeader(name, "" + value);
}
/**
* Has the specified header been set already in this response?
*
* @param name Name of the header to check
* @return true if the header has been set
*/
@Override
public boolean containsHeader(String name) {
// Need special handling for Content-Type and Content-Length due to
// special handling of these in coyoteResponse
char cc=name.charAt(0);
if(cc=='C' || cc=='c') {
if(name.equalsIgnoreCase("Content-Type")) {
// Will return null if this has not been set
return (getCoyoteResponse().getContentType() != null);
}
if(name.equalsIgnoreCase("Content-Length")) {
// -1 means not known and is not sent to client
return (getCoyoteResponse().getContentLengthLong() != -1);
}
}
return getCoyoteResponse().containsHeader(name);
}
@Override
public void setTrailerFields(Supplier> supplier) {
getCoyoteResponse().setTrailerFields(supplier);
}
@Override
public Supplier> getTrailerFields() {
return getCoyoteResponse().getTrailerFields();
}
/**
* Encode the session identifier associated with this response
* into the specified redirect URL, if necessary.
*
* @param url URL to be encoded
* @return true if the URL was encoded
*/
@Override
public String encodeRedirectURL(String url) {
if (isEncodeable(toAbsolute(url))) {
return toEncoded(url, request.getSessionInternal().getIdInternal());
} else {
return url;
}
}
/**
* Encode the session identifier associated with this response
* into the specified URL, if necessary.
*
* @param url URL to be encoded
* @return true if the URL was encoded
*/
@Override
public String encodeURL(String url) {
String absolute;
try {
absolute = toAbsolute(url);
} catch (IllegalArgumentException iae) {
// Relative URL
return url;
}
if (isEncodeable(absolute)) {
// W3c spec clearly said
if (url.equalsIgnoreCase("")) {
url = absolute;
} else if (url.equals(absolute) && !hasPath(url)) {
url += '/';
}
return toEncoded(url, request.getSessionInternal().getIdInternal());
} else {
return url;
}
}
/**
* Send an acknowledgement of a request.
*
* @param continueResponseTiming Indicates when the request for the ACK
* originated so it can be compared with the
* configured timing for ACK responses.
*
* @exception IOException if an input/output error occurs
*/
public void sendAcknowledgement(ContinueResponseTiming continueResponseTiming) throws IOException {
if (isCommitted()) {
return;
}
// Ignore any call from an included servlet
if (included) {
return;
}
getCoyoteResponse().action(ActionCode.ACK, continueResponseTiming);
}
/**
* Send an error response with the specified status and a
* default message.
*
* @param status HTTP status code to send
*
* @exception IllegalStateException if this response has
* already been committed
* @exception IOException if an input/output error occurs
*/
@Override
public void sendError(int status) throws IOException {
sendError(status, null);
}
/**
* Send an error response with the specified status and message.
*
* @param status HTTP status code to send
* @param message Corresponding message to send
*
* @exception IllegalStateException if this response has
* already been committed
* @exception IOException if an input/output error occurs
*/
@Override
public void sendError(int status, String message) throws IOException {
if (isCommitted()) {
throw new IllegalStateException
(sm.getString("coyoteResponse.sendError.ise"));
}
// Ignore any call from an included servlet
if (included) {
return;
}
setError();
getCoyoteResponse().setStatus(status);
getCoyoteResponse().setMessage(message);
// Clear any data content that has been buffered
resetBuffer();
// Cause the response to be finished (from the application perspective)
setSuspended(true);
}
/**
* Send a temporary redirect to the specified redirect location URL.
*
* @param location Location URL to redirect to
*
* @exception IllegalStateException if this response has
* already been committed
* @exception IOException if an input/output error occurs
*/
@Override
public void sendRedirect(String location) throws IOException {
sendRedirect(location, SC_FOUND);
}
/**
* Internal method that allows a redirect to be sent with a status other
* than {@link HttpServletResponse#SC_FOUND} (302). No attempt is made to
* validate the status code.
*
* @param location Location URL to redirect to
* @param status HTTP status code that will be sent
* @throws IOException an IO exception occurred
*/
public void sendRedirect(String location, int status) throws IOException {
if (isCommitted()) {
throw new IllegalStateException(sm.getString("coyoteResponse.sendRedirect.ise"));
}
// Ignore any call from an included servlet
if (included) {
return;
}
// Clear any data content that has been buffered
resetBuffer(true);
// Generate a temporary redirect to the specified location
try {
String locationUri;
// Relative redirects require HTTP/1.1
if (getRequest().getCoyoteRequest().getSupportsRelativeRedirects() &&
getContext().getUseRelativeRedirects()) {
locationUri = location;
} else {
locationUri = toAbsolute(location);
}
setStatus(status);
setHeader("Location", locationUri);
if (getContext().getSendRedirectBody()) {
PrintWriter writer = getWriter();
writer.print(sm.getString("coyoteResponse.sendRedirect.note",
Escape.htmlElementContent(locationUri)));
flushBuffer();
}
} catch (IllegalArgumentException e) {
log.warn(sm.getString("response.sendRedirectFail", location), e);
setStatus(SC_NOT_FOUND);
}
// Cause the response to be finished (from the application perspective)
setSuspended(true);
}
/**
* Set the specified date header to the specified value.
*
* @param name Name of the header to set
* @param value Date value to be set
*/
@Override
public void setDateHeader(String name, long value) {
if (name == null || name.length() == 0) {
return;
}
if (isCommitted()) {
return;
}
// Ignore any call from an included servlet
if (included) {
return;
}
setHeader(name, FastHttpDateFormat.formatDate(value));
}
/**
* Set the specified header to the specified value.
*
* @param name Name of the header to set
* @param value Value to be set
*/
@Override
public void setHeader(String name, String value) {
if (name == null || name.length() == 0 || value == null) {
return;
}
if (isCommitted()) {
return;
}
// Ignore any call from an included servlet
if (included) {
return;
}
char cc=name.charAt(0);
if (cc=='C' || cc=='c') {
if (checkSpecialHeader(name, value)) {
return;
}
}
getCoyoteResponse().setHeader(name, value);
}
/**
* Set the specified integer header to the specified value.
*
* @param name Name of the header to set
* @param value Integer value to be set
*/
@Override
public void setIntHeader(String name, int value) {
if (name == null || name.length() == 0) {
return;
}
if (isCommitted()) {
return;
}
// Ignore any call from an included servlet
if (included) {
return;
}
setHeader(name, "" + value);
}
/**
* Set the HTTP status to be returned with this response.
*
* @param status The new HTTP status
*/
@Override
public void setStatus(int status) {
if (isCommitted()) {
return;
}
// Ignore any call from an included servlet
if (included) {
return;
}
getCoyoteResponse().setStatus(status);
}
// ------------------------------------------------------ Protected Methods
/**
* Return true if the specified URL should be encoded with
* a session identifier. This will be true if all of the following
* conditions are met:
*
*
The request we are responding to asked for a valid session
*
The requested session ID was not received via a cookie
*
The specified URL points back to somewhere within the web
* application that is responding to this request
*
*
* @param location Absolute URL to be validated
* @return true if the URL should be encoded
*/
protected boolean isEncodeable(final String location) {
if (location == null) {
return false;
}
// Is this an intra-document reference?
if (location.startsWith("#")) {
return false;
}
// Are we in a valid session that is not using cookies?
final Request hreq = request;
final Session session = hreq.getSessionInternal(false);
if (session == null) {
return false;
}
if (hreq.isRequestedSessionIdFromCookie()) {
return false;
}
// Is URL encoding permitted
if (!hreq.getServletContext().getEffectiveSessionTrackingModes().
contains(SessionTrackingMode.URL)) {
return false;
}
if (SecurityUtil.isPackageProtectionEnabled()) {
Boolean result = AccessController.doPrivileged(
new PrivilegedDoIsEncodable(getContext(), hreq, session, location));
return result.booleanValue();
} else {
return doIsEncodeable(getContext(), hreq, session, location);
}
}
private static boolean doIsEncodeable(Context context, Request hreq, Session session,
String location) {
// Is this a valid absolute URL?
URL url = null;
try {
url = new URL(location);
} catch (MalformedURLException e) {
return false;
}
// Does this URL match down to (and including) the context path?
if (!hreq.getScheme().equalsIgnoreCase(url.getProtocol())) {
return false;
}
if (!hreq.getServerName().equalsIgnoreCase(url.getHost())) {
return false;
}
int serverPort = hreq.getServerPort();
if (serverPort == -1) {
if ("https".equals(hreq.getScheme())) {
serverPort = 443;
} else {
serverPort = 80;
}
}
int urlPort = url.getPort();
if (urlPort == -1) {
if ("https".equals(url.getProtocol())) {
urlPort = 443;
} else {
urlPort = 80;
}
}
if (serverPort != urlPort) {
return false;
}
String contextPath = context.getPath();
if (contextPath != null) {
String file = url.getFile();
if (!file.startsWith(contextPath)) {
return false;
}
String tok = ";" + SessionConfig.getSessionUriParamName(context) + "=" +
session.getIdInternal();
if( file.indexOf(tok, contextPath.length()) >= 0 ) {
return false;
}
}
// This URL belongs to our web application, so it is encodeable
return true;
}
/**
* Convert (if necessary) and return the absolute URL that represents the
* resource referenced by this possibly relative URL. If this URL is
* already absolute, return it unchanged.
*
* @param location URL to be (possibly) converted and then returned
* @return the encoded URL
*
* @exception IllegalArgumentException if a MalformedURLException is
* thrown when converting the relative URL to an absolute one
*/
protected String toAbsolute(String location) {
if (location == null) {
return location;
}
boolean leadingSlash = location.startsWith("/");
if (location.startsWith("//")) {
// Scheme relative
redirectURLCC.recycle();
// Add the scheme
String scheme = request.getScheme();
try {
redirectURLCC.append(scheme, 0, scheme.length());
redirectURLCC.append(':');
redirectURLCC.append(location, 0, location.length());
return redirectURLCC.toString();
} catch (IOException e) {
throw new IllegalArgumentException(location, e);
}
} else if (leadingSlash || !UriUtil.hasScheme(location)) {
redirectURLCC.recycle();
String scheme = request.getScheme();
String name = request.getServerName();
int port = request.getServerPort();
try {
redirectURLCC.append(scheme, 0, scheme.length());
redirectURLCC.append("://", 0, 3);
redirectURLCC.append(name, 0, name.length());
if ((scheme.equals("http") && port != 80)
|| (scheme.equals("https") && port != 443)) {
redirectURLCC.append(':');
String portS = port + "";
redirectURLCC.append(portS, 0, portS.length());
}
if (!leadingSlash) {
String relativePath = request.getDecodedRequestURI();
int pos = relativePath.lastIndexOf('/');
CharChunk encodedURI = null;
if (SecurityUtil.isPackageProtectionEnabled() ){
try{
encodedURI = AccessController.doPrivileged(
new PrivilegedEncodeUrl(urlEncoder, relativePath, pos));
} catch (PrivilegedActionException pae){
throw new IllegalArgumentException(location, pae.getException());
}
} else {
encodedURI = urlEncoder.encodeURL(relativePath, 0, pos);
}
redirectURLCC.append(encodedURI);
encodedURI.recycle();
redirectURLCC.append('/');
}
redirectURLCC.append(location, 0, location.length());
normalize(redirectURLCC);
} catch (IOException e) {
throw new IllegalArgumentException(location, e);
}
return redirectURLCC.toString();
} else {
return location;
}
}
/**
* Removes /./ and /../ sequences from absolute URLs.
* Code borrowed heavily from CoyoteAdapter.normalize()
*
* @param cc the char chunk containing the chars to normalize
*/
private void normalize(CharChunk cc) {
// Strip query string and/or fragment first as doing it this way makes
// the normalization logic a lot simpler
int truncate = cc.indexOf('?');
if (truncate == -1) {
truncate = cc.indexOf('#');
}
char[] truncateCC = null;
if (truncate > -1) {
truncateCC = Arrays.copyOfRange(cc.getBuffer(),
cc.getStart() + truncate, cc.getEnd());
cc.setEnd(cc.getStart() + truncate);
}
if (cc.endsWith("/.") || cc.endsWith("/..")) {
try {
cc.append('/');
} catch (IOException e) {
throw new IllegalArgumentException(cc.toString(), e);
}
}
char[] c = cc.getChars();
int start = cc.getStart();
int end = cc.getEnd();
int index = 0;
int startIndex = 0;
// Advance past the first three / characters (should place index just
// scheme://host[:port]
for (int i = 0; i < 3; i++) {
startIndex = cc.indexOf('/', startIndex + 1);
}
// Remove /./
index = startIndex;
while (true) {
index = cc.indexOf("/./", 0, 3, index);
if (index < 0) {
break;
}
copyChars(c, start + index, start + index + 2,
end - start - index - 2);
end = end - 2;
cc.setEnd(end);
}
// Remove /../
index = startIndex;
int pos;
while (true) {
index = cc.indexOf("/../", 0, 4, index);
if (index < 0) {
break;
}
// Can't go above the server root
if (index == startIndex) {
throw new IllegalArgumentException();
}
int index2 = -1;
for (pos = start + index - 1; (pos >= 0) && (index2 < 0); pos --) {
if (c[pos] == (byte) '/') {
index2 = pos;
}
}
copyChars(c, start + index2, start + index + 3,
end - start - index - 3);
end = end + index2 - index - 3;
cc.setEnd(end);
index = index2;
}
// Add the query string and/or fragment (if present) back in
if (truncateCC != null) {
try {
cc.append(truncateCC, 0, truncateCC.length);
} catch (IOException ioe) {
throw new IllegalArgumentException(ioe);
}
}
}
private void copyChars(char[] c, int dest, int src, int len) {
System.arraycopy(c, src, c, dest, len);
}
/**
* Determine if an absolute URL has a path component.
*
* @param uri the URL that will be checked
* @return true if the URL has a path
*/
private boolean hasPath(String uri) {
int pos = uri.indexOf("://");
if (pos < 0) {
return false;
}
pos = uri.indexOf('/', pos + 3);
if (pos < 0) {
return false;
}
return true;
}
/**
* Return the specified URL with the specified session identifier
* suitably encoded.
*
* @param url URL to be encoded with the session id
* @param sessionId Session id to be included in the encoded URL
* @return the encoded URL
*/
protected String toEncoded(String url, String sessionId) {
if ((url == null) || (sessionId == null)) {
return url;
}
String path = url;
String query = "";
String anchor = "";
int question = url.indexOf('?');
if (question >= 0) {
path = url.substring(0, question);
query = url.substring(question);
}
int pound = path.indexOf('#');
if (pound >= 0) {
anchor = path.substring(pound);
path = path.substring(0, pound);
}
StringBuilder sb = new StringBuilder(path);
if( sb.length() > 0 ) { // jsessionid can't be first.
sb.append(';');
sb.append(SessionConfig.getSessionUriParamName(
request.getContext()));
sb.append('=');
sb.append(sessionId);
}
sb.append(anchor);
sb.append(query);
return sb.toString();
}
private static class PrivilegedGenerateCookieString implements PrivilegedAction {
private final Context context;
private final Cookie cookie;
private final HttpServletRequest request;
public PrivilegedGenerateCookieString(Context context, Cookie cookie, HttpServletRequest request) {
this.context = context;
this.cookie = cookie;
this.request = request;
}
@Override
public String run(){
return context.getCookieProcessor().generateHeader(cookie, request);
}
}
private static class PrivilegedDoIsEncodable implements PrivilegedAction {
private final Context context;
private final Request hreq;
private final Session session;
private final String location;
public PrivilegedDoIsEncodable(Context context, Request hreq, Session session,
String location) {
this.context = context;
this.hreq = hreq;
this.session = session;
this.location = location;
}
@Override
public Boolean run(){
return Boolean.valueOf(doIsEncodeable(context, hreq, session, location));
}
}
private static class PrivilegedEncodeUrl implements PrivilegedExceptionAction {
private final UEncoder urlEncoder;
private final String relativePath;
private final int end;
public PrivilegedEncodeUrl(UEncoder urlEncoder, String relativePath, int end) {
this.urlEncoder = urlEncoder;
this.relativePath = relativePath;
this.end = end;
}
@Override
public CharChunk run() throws IOException{
return urlEncoder.encodeURL(relativePath, 0, end);
}
}
}
