org.apache.wicket.portlet.ResponseState 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.wicket.portlet;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.CharArrayReader;
import java.io.CharArrayWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.Writer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.concurrent.atomic.AtomicLong;
import javax.portlet.MimeResponse;
import javax.portlet.PortletRequest;
import javax.portlet.PortletResponse;
import javax.portlet.ResourceResponse;
import javax.servlet.ServletContext;
import javax.servlet.ServletOutputStream;
import javax.servlet.WriteListener;
import javax.servlet.http.Cookie;
/**
* Temporarily holds the current state of a Wicket response when invoked from
* WicketPortlet: buffer, headers, state and the redirect location to be
* processed afterwards within WicketPortlet
*
* @author Ate Douma
* @author Peter Pastrnak
*/
public class ResponseState {
private static final String AJAX_LOCATION_HEADER_NAME = "Ajax-Location";
private static final int INITIAL_BUFFER_SIZE = 8 * 1024;
private static final int MEMORY_BUFFER_SIZE = 64 * 1024;
private static final String DEFAULT_CHARSET = "UTF-8";
private static final AtomicLong index = new AtomicLong();
private final boolean isActionResponse;
private final boolean isEventResponse;
private final boolean isRenderResponse;
private final boolean isResourceResponse;
private final boolean isMimeResponse;
private final boolean isStateAwareResponse;
private final Locale defaultLocale;
private final PortletResponse response;
private boolean flushed;
private File responseBufferFolder;
private ByteOutputBuffer byteOutputBuffer;
private CharOutputBuffer charOutputBuffer;
private ServletOutputStream outputStream;
private PrintWriter printWriter;
private HashMap> headers;
private ArrayList cookies;
private boolean committed;
private boolean closed;
private boolean hasStatus;
private boolean hasError;
private Locale locale;
private boolean setContentTypeAfterEncoding;
private String characterEncoding;
private int contentLength = -1;
private String contentType;
private int statusCode;
/**
* FIXME javadoc
*
* Stores the effective wicket url which is used by {@link WicketPortlet} in
* the view phase to request a render from wicket core.
*
* @see IRequestCycleSettings#REDIRECT_TO_RENDER
* @see WicketFilterPortletHelper#initFilter
*/
private String redirectLocation;
public ResponseState(PortletRequest request, PortletResponse response, File responseBufferFolder) {
this.responseBufferFolder = responseBufferFolder;
String lifecyclePhase = (String) request.getAttribute(PortletRequest.LIFECYCLE_PHASE);
isActionResponse = PortletRequest.ACTION_PHASE.equals(lifecyclePhase);
isEventResponse = PortletRequest.EVENT_PHASE.equals(lifecyclePhase);
isRenderResponse = PortletRequest.RENDER_PHASE.equals(lifecyclePhase);
isResourceResponse = PortletRequest.RESOURCE_PHASE.equals(lifecyclePhase);
isStateAwareResponse = isActionResponse || isEventResponse;
isMimeResponse = isRenderResponse || isResourceResponse;
this.response = response;
defaultLocale = isMimeResponse ? ((MimeResponse) response).getLocale() : null;
}
private ArrayList getHeaderList(String name, boolean create) {
if (headers == null) {
headers = new HashMap>();
}
ArrayList headerList = headers.get(name);
if (headerList == null && create) {
headerList = new ArrayList();
headers.put(name, headerList);
}
return headerList;
}
private void failIfCommitted() {
if (committed) {
throw new IllegalStateException("Response has been already committed.");
}
}
public boolean isActionResponse() {
return isActionResponse;
}
public boolean isEventResponse() {
return isEventResponse;
}
public boolean isRenderResponse() {
return isRenderResponse;
}
public boolean isResourceResponse() {
return isResourceResponse;
}
public boolean isMimeResponse() {
return isMimeResponse;
}
public boolean isStateAwareResponse() {
return isStateAwareResponse;
}
/*
* (non-Javadoc)
*
* @see
* javax.servlet.http.HttpServletResponseWrapper#addCookie(javax.servlet
* .http.Cookie)
*/
public void addCookie(Cookie cookie) {
failIfCommitted();
if (cookies == null) {
cookies = new ArrayList();
}
cookies.add(cookie);
}
/*
* (non-Javadoc)
*
* @see
* javax.servlet.http.HttpServletResponseWrapper#addDateHeader(java.lang
* .String, long)
*/
public void addDateHeader(String name, long date) {
addHeader(name, Long.toString(date));
}
/*
* (non-Javadoc)
*
* @see
* javax.servlet.http.HttpServletResponseWrapper#addHeader(java.lang.String,
* java.lang.String)
*/
public void addHeader(String name, String value) {
if (isMimeResponse) {
failIfCommitted();
getHeaderList(name, true).add(value);
}
}
/*
* (non-Javadoc)
*
* @see
* javax.servlet.http.HttpServletResponseWrapper#addIntHeader(java.lang.
* String, int)
*/
public void addIntHeader(String name, int value) {
addHeader(name, Integer.toString(value));
}
/*
* (non-Javadoc)
*
* @see
* javax.servlet.http.HttpServletResponseWrapper#containsHeader(java.lang
* .String)
*/
public boolean containsHeader(String name) {
// Note: Portlet Spec 2.0 demands this to always return false...
return isMimeResponse && getHeaderList(name, false) != null;
}
/*
* (non-Javadoc)
*
* @see javax.servlet.http.HttpServletResponseWrapper#sendError(int,
* java.lang.String)
*/
public void sendError(int errorCode, String errorMessage) throws IOException {
failIfCommitted();
committed = true;
closed = true;
hasError = true;
}
/*
* (non-Javadoc)
*
* @see javax.servlet.http.HttpServletResponseWrapper#sendError(int)
*/
public void sendError(int errorCode) throws IOException {
sendError(errorCode, null);
}
/*
* (non-Javadoc)
*
* @see
* javax.servlet.http.HttpServletResponseWrapper#sendRedirect(java.lang.
* String)
*/
public void sendRedirect(String redirectLocation) throws IOException {
if (isActionResponse || isMimeResponse) {
failIfCommitted();
this.closed = true;
this.committed = true;
this.redirectLocation = redirectLocation;
}
}
public String getRedirectLocation() {
return redirectLocation;
}
public String getAjaxRedirectLocation() {
ArrayList values = getHeaderList(AJAX_LOCATION_HEADER_NAME, false);
return ((values != null) && (!values.isEmpty())) ? values.get(values.size() - 1) : null;
}
/*
* (non-Javadoc)
*
* @see
* javax.servlet.http.HttpServletResponseWrapper#setDateHeader(java.lang
* .String, long)
*/
public void setDateHeader(String name, long date) {
setHeader(name, Long.toString(date));
}
/*
* (non-Javadoc)
*
* @see
* javax.servlet.http.HttpServletResponseWrapper#setHeader(java.lang.String,
* java.lang.String)
*/
public void setHeader(String name, String value) {
if (isMimeResponse && !committed) {
ArrayList headerList = getHeaderList(name, true);
headerList.clear();
headerList.add(value);
if (AJAX_LOCATION_HEADER_NAME.equalsIgnoreCase(name)) {
redirectLocation = value;
}
}
}
/*
* (non-Javadoc)
*
* @see
* javax.servlet.http.HttpServletResponseWrapper#setIntHeader(java.lang.
* String, int)
*/
public void setIntHeader(String name, int value) {
setHeader(name, Integer.toString(value));
}
/*
* (non-Javadoc)
*
* @see javax.servlet.http.HttpServletResponseWrapper#setStatus(int,
* java.lang.String)
*/
public void setStatus(int statusCode, String message) {
throw new UnsupportedOperationException("This method is deprecated and no longer supported");
}
/*
* (non-Javadoc)
*
* @see javax.servlet.http.HttpServletResponseWrapper#setStatus(int)
*/
public void setStatus(int statusCode) {
if (!committed) {
this.statusCode = statusCode;
hasStatus = true;
resetBuffer();
}
}
/*
* (non-Javadoc)
*
* @see javax.servlet.ServletResponseWrapper#flushBuffer()
*/
public void flushBuffer() throws IOException {
if (isMimeResponse && !closed) {
committed = true;
}
}
/*
* (non-Javadoc)
*
* @see javax.servlet.ServletResponseWrapper#getBufferSize()
*/
public int getBufferSize() {
return isMimeResponse ? Integer.MAX_VALUE : 0;
}
/*
* (non-Javadoc)
*
* @see javax.servlet.ServletResponseWrapper#getCharacterEncoding()
*/
public String getCharacterEncoding() {
return isMimeResponse ? characterEncoding != null ? characterEncoding : "ISO-8859-1" : null;
}
/*
* (non-Javadoc)
*
* @see javax.servlet.ServletResponseWrapper#getContentType()
*/
public String getContentType() {
return isMimeResponse ? contentType : null;
}
/*
* (non-Javadoc)
*
* @see javax.servlet.ServletResponseWrapper#getLocale()
*/
public Locale getLocale() {
return isMimeResponse ? locale != null ? locale : defaultLocale : null;
}
/*
* (non-Javadoc)
*
* @see javax.servlet.ServletResponseWrapper#getOutputStream()
*/
public ServletOutputStream getOutputStream() throws IOException {
if (isStateAwareResponse) {
// Portlet Spec 2.0 requires Portlet Container to supply a "no-op"
// OutputStream object
// so delegate back to current PortletServletResponseWrapper to
// return that one
return null;
}
if (outputStream == null) {
if (printWriter != null) {
throw new IllegalStateException("getWriter() has already been called on this response");
}
byteOutputBuffer = new ByteOutputBuffer();
outputStream = new ServletOutputStream() {
@Override
public void write(int b) throws IOException {
if (!closed) {
byteOutputBuffer.write(b);
if ((contentLength) > -1 && (byteOutputBuffer.size() >= contentLength)) {
committed = true;
closed = true;
}
}
}
@Override
public boolean isReady() {
return true;
}
@Override
public void setWriteListener(WriteListener writeListener) {
}
};
}
return outputStream;
}
/*
* (non-Javadoc)
*
* @see javax.servlet.ServletResponseWrapper#getWriter()
*/
public PrintWriter getWriter() throws IOException {
if (isStateAwareResponse) {
// Portlet Spec 2.0 requires Portlet Container to supply a "no-op"
// PrintWriter object
// so delegate back to current PortletServletResponseWrapper to
// return that one
return null;
}
if (printWriter == null) {
if (outputStream != null) {
throw new IllegalStateException("getOutputStream() has already been called on this response");
}
charOutputBuffer = new CharOutputBuffer();
printWriter = new PrintWriter(charOutputBuffer);
}
return printWriter;
}
/*
* (non-Javadoc)
*
* @see javax.servlet.ServletResponseWrapper#isCommitted()
*/
public boolean isCommitted() {
return isMimeResponse && committed;
}
/*
* (non-Javadoc)
*
* @see javax.servlet.ServletResponseWrapper#reset()
*/
public void reset() {
resetBuffer(); // fails if committed
headers = null;
cookies = null;
hasStatus = false;
contentLength = -1;
if (printWriter == null) {
contentType = null;
characterEncoding = null;
locale = null;
}
}
/*
* (non-Javadoc)
*
* @see javax.servlet.ServletResponseWrapper#resetBuffer()
*/
public void resetBuffer() {
failIfCommitted();
if (outputStream != null) {
try {
outputStream.flush();
}
catch (Exception e) {
}
byteOutputBuffer.reset();
}
else if (printWriter != null) {
printWriter.flush();
charOutputBuffer.reset();
}
}
/*
* (non-Javadoc)
*
* @see javax.servlet.ServletResponseWrapper#setBufferSize(int)
*/
public void setBufferSize(int size) {
}
/*
* (non-Javadoc)
*
* @see
* javax.servlet.ServletResponseWrapper#setCharacterEncoding(java.lang.String
* )
*/
public void setCharacterEncoding(String charset) {
if (isResourceResponse && charset != null && printWriter == null) {
failIfCommitted();
characterEncoding = charset;
setContentTypeAfterEncoding = false;
}
}
/*
* (non-Javadoc)
*
* @see javax.servlet.ServletResponseWrapper#setContentLength(int)
*/
public void setContentLength(int len) {
if (isResourceResponse && printWriter == null && len > 0) {
failIfCommitted();
contentLength = len;
if (outputStream != null) {
try {
outputStream.flush();
}
catch (Exception e) {
}
}
if ((!closed) && (byteOutputBuffer != null) && (byteOutputBuffer.size() >= len)) {
committed = true;
closed = true;
}
}
}
/*
* (non-Javadoc)
*
* @see
* javax.servlet.ServletResponseWrapper#setContentType(java.lang.String)
*/
public void setContentType(String type) {
if (isMimeResponse) {
failIfCommitted();
contentType = type;
setContentTypeAfterEncoding = false;
if (printWriter == null) {
// TODO: parse possible encoding for better return value from
// getCharacterEncoding()
}
}
}
/*
* (non-Javadoc)
*
* @see javax.servlet.ServletResponseWrapper#setLocale(java.util.Locale)
*/
public void setLocale(Locale locale) {
if (isResourceResponse) {
failIfCommitted();
this.locale = locale;
}
}
public void clear() {
if (printWriter != null) {
printWriter.close();
charOutputBuffer.reset();
printWriter = null;
}
if (outputStream != null) {
try {
outputStream.close();
}
catch (IOException e) {
}
outputStream = null;
byteOutputBuffer.reset();
}
headers = null;
cookies = null;
committed = false;
hasStatus = false;
hasError = false;
locale = null;
setContentTypeAfterEncoding = false;
closed = false;
characterEncoding = null;
contentLength = -1;
contentType = null;
statusCode = 0;
redirectLocation = null;
}
public void flushAndClose() throws IOException {
if (flushed) {
throw new IllegalStateException("Response has been already flushed and closed.");
}
flushed = true;
if (cookies != null) {
for (Cookie cookie : cookies) {
response.addProperty(cookie);
}
cookies = null;
}
if (isMimeResponse) {
MimeResponse mimeResponse = (MimeResponse) response;
ResourceResponse resourceResponse = isResourceResponse ? (ResourceResponse) response : null;
if (locale != null) {
try {
resourceResponse.setLocale(locale);
}
catch (UnsupportedOperationException usoe) {
// TODO: temporary "fix" for JBoss Portal which doesn't
// yet
// support this
// (although required by the Portlet API 2.0!)
}
}
if (contentType != null) {
if (characterEncoding != null) {
if (setContentTypeAfterEncoding) {
resourceResponse.setCharacterEncoding(characterEncoding);
resourceResponse.setContentType(contentType);
}
else {
resourceResponse.setContentType(contentType);
resourceResponse.setCharacterEncoding(characterEncoding);
}
}
else {
mimeResponse.setContentType(contentType);
}
}
else if (characterEncoding != null) {
resourceResponse.setCharacterEncoding(characterEncoding);
}
if (headers != null) {
for (Map.Entry> entry : headers.entrySet()) {
for (String value : entry.getValue()) {
mimeResponse.addProperty(entry.getKey(), value);
}
}
headers = null;
}
if (isResourceResponse && hasStatus) {
resourceResponse.setProperty(ResourceResponse.HTTP_STATUS_CODE, Integer.toString(statusCode));
}
if (isResourceResponse && contentLength > -1) {
try {
resourceResponse.setContentLength(contentLength);
}
catch (UnsupportedOperationException usoe) {
// TODO: temporary "fix" for JBoss Portal which doesn't
// yet
// support this
// (although required by the Portlet API 2.0!)
}
}
}
if (!hasError && !closed && redirectLocation == null && isMimeResponse) {
MimeResponse mimeResponse = (MimeResponse) response;
if (outputStream != null) {
outputStream.flush();
byteOutputBuffer.writeToAndClose(mimeResponse.getPortletOutputStream());
}
else if (printWriter != null) {
printWriter.flush();
charOutputBuffer.writeToAndClose(mimeResponse.getWriter());
}
}
if (outputStream != null) {
outputStream.close();
outputStream = null;
}
if (printWriter != null) {
printWriter.close();
printWriter = null;
}
}
private File getResponseBufferFolder() {
if (responseBufferFolder == null) {
ServletContext context = ThreadPortletContext.getServletContext();
if (context != null) {
responseBufferFolder = (File) context.getAttribute("javax.servlet.context.tempdir");
if (responseBufferFolder != null) {
responseBufferFolder = new File(responseBufferFolder, "wicket-response-buffers");
}
}
if (responseBufferFolder == null) {
try {
responseBufferFolder = File.createTempFile("wicket-response-buffers", null).getParentFile();
}
catch (IOException e) {
throw new IllegalStateException("Cannot create response buffer folder.", e);
}
}
responseBufferFolder.mkdirs();
}
return responseBufferFolder;
}
private File getResponseBufferFile() {
return new File(getResponseBufferFolder(), "response-buffer" + index.getAndIncrement());
}
private class CharOutputBuffer extends CharArrayWriter {
private File file;
private Writer fileWriter;
public CharOutputBuffer() {
super(INITIAL_BUFFER_SIZE);
}
private boolean useFile(int pos) {
return (fileWriter != null) || (pos > MEMORY_BUFFER_SIZE);
}
private Writer getFileWriter() throws IOException {
if (fileWriter == null) {
file = getResponseBufferFile();
fileWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), DEFAULT_CHARSET));
fileWriter.write(buf, 0, count);
}
return fileWriter;
}
@Override
public void write(int c) {
if (useFile(count + 1)) {
try {
getFileWriter().write(c);
count++;
}
catch (IOException e) {
throw new IllegalStateException("Cannot write cache file.", e);
}
}
else {
super.write(c);
}
}
@Override
public void write(char[] c, int off, int len) {
if (useFile(count + len)) {
try {
getFileWriter().write(c, off, len);
count += len;
}
catch (IOException e) {
throw new IllegalStateException("Cannot write cache file.", e);
}
}
else {
super.write(c, off, len);
}
}
@Override
public void write(String str, int off, int len) {
if (useFile(count + 1)) {
try {
getFileWriter().write(str, off, len);
count += len;
}
catch (IOException e) {
throw new IllegalStateException("Cannot write cache file.", e);
}
}
else {
super.write(str, off, len);
}
}
public void writeToAndClose(Writer writer) throws IOException {
try {
Reader reader;
if (fileWriter != null) {
try {
fileWriter.close();
}
catch (Exception e) {
}
reader = new BufferedReader(new InputStreamReader(new FileInputStream(file), DEFAULT_CHARSET));
}
else {
reader = new CharArrayReader(buf, 0, count);
}
try {
int count;
while ((count = reader.read(buf)) > 0) {
writer.write(buf, 0, count);
}
}
finally {
if (reader != null) {
try {
reader.close();
}
catch (Exception e) {
}
}
}
}
finally {
buf = null;
reset();
}
}
@Override
public void reset() {
super.reset();
if (fileWriter != null) {
try {
fileWriter.close();
fileWriter = null;
}
catch (Exception e) {
}
}
if (file != null) {
try {
file.delete();
file = null;
}
catch (Exception e) {
}
}
}
@Override
protected void finalize() throws Throwable {
reset();
}
}
private class ByteOutputBuffer extends ByteArrayOutputStream {
private File file;
private OutputStream fileOutputStream;
public ByteOutputBuffer() {
super(INITIAL_BUFFER_SIZE);
}
private boolean useFile(int pos) {
return (fileOutputStream != null) || (pos > MEMORY_BUFFER_SIZE);
}
private OutputStream getFileWriter() throws IOException {
if (fileOutputStream == null) {
file = getResponseBufferFile();
fileOutputStream = new BufferedOutputStream(new FileOutputStream(file));
fileOutputStream.write(buf, 0, count);
}
return fileOutputStream;
}
@Override
public void write(int b) {
if (useFile(count + 1)) {
try {
getFileWriter().write(b);
count++;
}
catch (IOException e) {
throw new IllegalStateException("Cannot write cache file.", e);
}
}
else {
super.write(b);
}
}
@Override
public void write(byte[] b, int off, int len) {
if (useFile(count + len)) {
try {
getFileWriter().write(b, off, len);
count += len;
}
catch (IOException e) {
throw new IllegalStateException("Cannot write cache file.", e);
}
}
else {
super.write(b, off, len);
}
}
public void writeToAndClose(OutputStream outputStream) throws IOException {
try {
InputStream inputStream;
if (fileOutputStream != null) {
try {
fileOutputStream.close();
}
catch (Exception e) {
}
inputStream = new BufferedInputStream(new FileInputStream(file));
}
else {
inputStream = new ByteArrayInputStream(buf, 0, count);
}
try {
int count;
while ((count = inputStream.read(buf)) > 0) {
outputStream.write(buf, 0, count);
}
}
finally {
if (inputStream != null) {
try {
inputStream.close();
}
catch (Exception e) {
}
}
}
}
finally {
buf = null;
reset();
}
}
@Override
public void reset() {
super.reset();
if (fileOutputStream != null) {
try {
fileOutputStream.close();
fileOutputStream = null;
}
catch (Exception e) {
}
}
if (file != null) {
try {
file.delete();
file = null;
}
catch (Exception e) {
}
}
}
@Override
protected void finalize() throws Throwable {
reset();
}
}
}
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