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org.apache.jackrabbit.webdav.WebdavResponseImpl 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.jackrabbit.webdav;
import org.apache.jackrabbit.webdav.header.CodedUrlHeader;
import org.apache.jackrabbit.webdav.header.Header;
import org.apache.jackrabbit.webdav.lock.ActiveLock;
import org.apache.jackrabbit.webdav.lock.LockDiscovery;
import org.apache.jackrabbit.webdav.observation.EventDiscovery;
import org.apache.jackrabbit.webdav.observation.ObservationConstants;
import org.apache.jackrabbit.webdav.observation.Subscription;
import org.apache.jackrabbit.webdav.observation.SubscriptionDiscovery;
import org.apache.jackrabbit.webdav.property.DavPropertySet;
import org.apache.jackrabbit.webdav.xml.DomUtil;
import org.apache.jackrabbit.webdav.xml.XmlSerializable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerException;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.function.Supplier;
import java.util.zip.GZIPOutputStream;
/**
* WebdavResponseImpl implements the WebdavResponse interface.
*/
public class WebdavResponseImpl implements WebdavResponse {
private static Logger log = LoggerFactory.getLogger(WebdavResponseImpl.class);
private HttpServletResponse httpResponse;
/**
* Create a new WebdavResponse
*
* @param httpResponse
*/
public WebdavResponseImpl(HttpServletResponse httpResponse) {
this(httpResponse, false);
}
/**
* Create a new WebdavResponse
*
* @param httpResponse
* @param noCache
*/
public WebdavResponseImpl(HttpServletResponse httpResponse, boolean noCache) {
this.httpResponse = httpResponse;
if (noCache) {
/* set cache control headers */
addHeader("Pragma", "No-cache"); // http1.0
addHeader("Cache-Control", "no-cache"); // http1.1
}
}
/**
* If the specifid exception provides an error condition an Xml response body
* is sent providing more detailed information about the error. Otherwise only
* the error code and status phrase is sent back.
*
* @param exception
* @throws IOException
* @see DavServletResponse#sendError(org.apache.jackrabbit.webdav.DavException)
* @see #sendError(int, String)
* @see #sendXmlResponse(XmlSerializable, int)
*/
public void sendError(DavException exception) throws IOException {
if (!exception.hasErrorCondition()) {
httpResponse.sendError(exception.getErrorCode(), exception.getStatusPhrase());
} else {
sendXmlResponse(exception, exception.getErrorCode());
}
}
@Override
public void sendMultiStatus(MultiStatus multistatus) throws IOException {
sendXmlResponse(multistatus, SC_MULTI_STATUS);
}
@Override
public void sendMultiStatus(MultiStatus multistatus, List acceptableContentCodings) throws IOException {
sendXmlResponse(multistatus, SC_MULTI_STATUS, acceptableContentCodings);
}
/**
* Send response body for a lock request that was intended to refresh one
* or several locks.
*
* @param locks
* @throws java.io.IOException
* @see DavServletResponse#sendRefreshLockResponse(org.apache.jackrabbit.webdav.lock.ActiveLock[])
*/
public void sendRefreshLockResponse(ActiveLock[] locks) throws IOException {
DavPropertySet propSet = new DavPropertySet();
propSet.add(new LockDiscovery(locks));
sendXmlResponse(propSet, SC_OK);
}
@Override
public void sendXmlResponse(XmlSerializable serializable, int status) throws IOException {
sendXmlResponse(serializable, status, Collections.emptyList());
}
@Override
public void sendXmlResponse(XmlSerializable serializable, int status, List acceptableContentCodings) throws IOException {
httpResponse.setStatus(status);
if (serializable != null) {
try {
ByteArrayOutputStream out = new ByteArrayOutputStream();
Document doc = DomUtil.createDocument();
doc.appendChild(serializable.toXml(doc));
DomUtil.transformDocument(doc, out);
out.close();
httpResponse.setContentType("text/xml; charset=UTF-8");
// use GZIP iff accepted by client and content size >= 256 octets
if (out.size() < 256 || !acceptableContentCodings.contains("gzip")) {
httpResponse.setContentLength(out.size());
out.writeTo(httpResponse.getOutputStream());
} else {
httpResponse.setHeader("Content-Encoding", "gzip");
try (OutputStream os = new GZIPOutputStream(httpResponse.getOutputStream())) {
out.writeTo(os);
}
}
} catch (ParserConfigurationException e) {
log.error(e.getMessage());
throw new IOException(e.getMessage());
} catch (TransformerException e) {
log.error(e.getMessage());
throw new IOException(e.getMessage());
} catch (SAXException e) {
log.error(e.getMessage());
throw new IOException(e.getMessage());
}
}
}
//----------------------------< ObservationDavServletResponse Interface >---
/**
*
* @param subscription
* @throws IOException
* @see org.apache.jackrabbit.webdav.observation.ObservationDavServletResponse#sendSubscriptionResponse(org.apache.jackrabbit.webdav.observation.Subscription)
*/
public void sendSubscriptionResponse(Subscription subscription) throws IOException {
String id = subscription.getSubscriptionId();
if (id != null) {
Header h = new CodedUrlHeader(ObservationConstants.HEADER_SUBSCRIPTIONID, id);
httpResponse.setHeader(h.getHeaderName(), h.getHeaderValue());
}
DavPropertySet propSet = new DavPropertySet();
propSet.add(new SubscriptionDiscovery(subscription));
sendXmlResponse(propSet, SC_OK);
}
/**
*
* @param eventDiscovery
* @throws IOException
* @see org.apache.jackrabbit.webdav.observation.ObservationDavServletResponse#sendPollResponse(org.apache.jackrabbit.webdav.observation.EventDiscovery)
*/
public void sendPollResponse(EventDiscovery eventDiscovery) throws IOException {
sendXmlResponse(eventDiscovery, SC_OK);
}
//--------------------------------------< HttpServletResponse interface >---
@Override
public void addCookie(Cookie cookie) {
httpResponse.addCookie(cookie);
}
@Override
public boolean containsHeader(String s) {
return httpResponse.containsHeader(s);
}
@Override
public String encodeURL(String s) {
return httpResponse.encodeRedirectURL(s);
}
@Override
public String encodeRedirectURL(String s) {
return httpResponse.encodeRedirectURL(s);
}
@Override
public String encodeUrl(String s) {
return httpResponse.encodeUrl(s);
}
@Override
public String encodeRedirectUrl(String s) {
return httpResponse.encodeRedirectURL(s);
}
@Override
public void sendError(int i, String s) throws IOException {
httpResponse.sendError(i, s);
}
@Override
public void sendError(int i) throws IOException {
httpResponse.sendError(i);
}
@Override
public void sendRedirect(String s) throws IOException {
httpResponse.sendRedirect(s);
}
@Override
public void setDateHeader(String s, long l) {
httpResponse.setDateHeader(s, l);
}
@Override
public void addDateHeader(String s, long l) {
httpResponse.addDateHeader(s, l);
}
@Override
public void setHeader(String s, String s1) {
httpResponse.setHeader(s, s1);
}
@Override
public void addHeader(String s, String s1) {
httpResponse.addHeader(s, s1);
}
@Override
public void setIntHeader(String s, int i) {
httpResponse.setIntHeader(s, i);
}
@Override
public void addIntHeader(String s, int i) {
httpResponse.addIntHeader(s, i);
}
@Override
public void setStatus(int i) {
httpResponse.setStatus(i);
}
@Override
public void setStatus(int i, String s) {
httpResponse.setStatus(i, s);
}
@Override
public String getCharacterEncoding() {
return httpResponse.getCharacterEncoding();
}
@Override
public ServletOutputStream getOutputStream() throws IOException {
return httpResponse.getOutputStream();
}
@Override
public PrintWriter getWriter() throws IOException {
return httpResponse.getWriter();
}
@Override
public void setContentLength(int i) {
httpResponse.setContentLength(i);
}
@Override
public void setContentType(String s) {
httpResponse.setContentType(s);
}
@Override
public void setBufferSize(int i) {
httpResponse.setBufferSize(i);
}
@Override
public int getBufferSize() {
return httpResponse.getBufferSize();
}
@Override
public void flushBuffer() throws IOException {
httpResponse.flushBuffer();
}
@Override
public void resetBuffer() {
httpResponse.resetBuffer();
}
@Override
public boolean isCommitted() {
return httpResponse.isCommitted();
}
@Override
public void reset() {
httpResponse.reset();
}
@Override
public void setLocale(Locale locale) {
httpResponse.setLocale(locale);
}
@Override
public Locale getLocale() {
return httpResponse.getLocale();
}
@Override
public String getContentType() {
return httpResponse.getContentType();
}
@Override
public void setCharacterEncoding(String charset) {
httpResponse.setCharacterEncoding(charset);
}
@Override
public int getStatus() {
return httpResponse.getStatus();
}
@Override
public String getHeader(String name) {
return httpResponse.getHeader(name);
}
@Override
public Collection getHeaders(String name) {
return httpResponse.getHeaders(name);
}
@Override
public Collection getHeaderNames() {
return httpResponse.getHeaderNames();
}
@Override
public void setContentLengthLong(long len) {
httpResponse.setContentLengthLong(len);
}
// Servlet 4.0 API support for trailers, for now using reflection
public void setTrailerFields(Supplier> supplier) {
try {
java.lang.reflect.Method stf = httpResponse.getClass().getDeclaredMethod("setTrailerFields", Supplier.class);
stf.invoke(httpResponse, supplier);
} catch (IllegalAccessException | java.lang.reflect.InvocationTargetException | NoSuchMethodException
| SecurityException ex) {
throw new UnsupportedOperationException("no servlet 4.0 support on: " + httpResponse.getClass(), ex);
}
}
@SuppressWarnings("unchecked")
public Supplier> getTrailerFields() {
try {
java.lang.reflect.Method stf = httpResponse.getClass().getDeclaredMethod("getTrailerFields");
return (Supplier>) stf.invoke(httpResponse);
} catch (IllegalAccessException | java.lang.reflect.InvocationTargetException | NoSuchMethodException
| SecurityException ex) {
throw new UnsupportedOperationException("no servlet 4.0 support on: " + httpResponse.getClass(), ex);
}
}
}
