/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.enterprise.web.connector.grizzly.handlers;
import com.sun.enterprise.web.connector.grizzly.Constants;
import com.sun.enterprise.web.connector.grizzly.FileCacheFactory;
import com.sun.enterprise.web.connector.grizzly.Handler;
import com.sun.enterprise.web.connector.grizzly.FileCache;
import com.sun.enterprise.web.connector.grizzly.SelectorThread;
import java.io.IOException;
import java.nio.channels.SocketChannel;
import org.apache.coyote.Request;
import org.apache.coyote.Response;
import org.apache.coyote.tomcat5.CoyoteConnector;
import org.apache.coyote.tomcat5.CoyoteRequest;
import org.apache.coyote.tomcat5.CoyoteAdapter;
import org.apache.tomcat.util.buf.Ascii;
import org.apache.tomcat.util.buf.ByteChunk;
import org.apache.tomcat.util.buf.MessageBytes;
import org.apache.tomcat.util.http.MimeHeaders;
/**
* This <code>Handler</code> is invoked after the request line has been parsed.
*
* @author Jeanfrancois Arcand
*/
public class NoParsingHandler implements Handler<Request> {
/**
* The <code>SocketChannel</code> used to send a static resources.
*/
private SocketChannel socketChannel;
/**
* The FileCache mechanism used to cache static resources.
*/
protected FileCache fileCache;
// ----------------------------------------------------- Constructor ----//
public NoParsingHandler(){
}
/**
* Attach a <code>SocketChannel</code> to this object.
*/
public void attachChannel(SocketChannel socketChannel){
this.socketChannel = socketChannel;
if ( fileCache == null && socketChannel != null){
fileCache = FileCacheFactory.getFactory(
socketChannel.socket().getLocalPort()).getFileCache();
}
}
/**
* Intercept the request and decide if we cache the static resource. If the
* static resource is already cached, return it.
*/
public int handle(Request request, int handlerCode) throws IOException{
if ( socketChannel == null || !FileCacheFactory.isEnabled())
return Handler.CONTINUE;
// If not initialized, dont' continue
if ( fileCache == null && handlerCode != Handler.RESPONSE_PROCEEDED){
return Handler.CONTINUE;
}
if ( handlerCode == Handler.RESPONSE_PROCEEDED ){
CoyoteRequest cr =
(CoyoteRequest)request.getNote(CoyoteAdapter.ADAPTER_NOTES);
// We can cache it only if no security constraint and no
// filter have been defined.
if ( cr != null && cr.getWrapper() != null){
String mappedServlet = cr.getWrapper().getName();
if ( !mappedServlet.equals(FileCache.DEFAULT_SERVLET_NAME) )
return Handler.CONTINUE;
if ( cr.getContext().findConstraints().length == 0 ){
if (!fileCache.isEnabled()) return Handler.CONTINUE;
String docroot;
if ( cr.getContextPath().equals("") ){
docroot = cr.getContext().getDocBase();
} else {
docroot = SelectorThread.getWebAppRootPath();
}
String requestURI = cr.getRequestURI();
Response response = cr.getCoyoteRequest().getResponse();
MimeHeaders headers = response.getMimeHeaders();
boolean xPoweredBy = (
(CoyoteConnector)cr.getConnector()).isXpoweredBy();
fileCache.add(mappedServlet,docroot,requestURI,headers,
xPoweredBy);
}
}
} else if ( handlerCode == Handler.HEADERS_PARSED ) {
ByteChunk bc = request.requestURI().getByteChunk();
if ( fileCache.sendCache(bc.getBytes(),bc.getStart(),
bc.getLength(),socketChannel,keepAlive(request)) ){
return Handler.BREAK;
}
}
return Handler.CONTINUE;
}
/**
* Get the keep-alive header.
*/
private boolean keepAlive(Request request){
MimeHeaders headers = request.getMimeHeaders();
// Check connection header
MessageBytes connectionValueMB = headers.getValue("connection");
if (connectionValueMB != null) {
ByteChunk connectionValueBC = connectionValueMB.getByteChunk();
if (findBytes(connectionValueBC, Constants.CLOSE_BYTES) != -1) {
return false;
} else if (findBytes(connectionValueBC,
Constants.KEEPALIVE_BYTES) != -1) {
return true;
}
}
return false;
}
/**
* Specialized utility method: find a sequence of lower case bytes inside
* a ByteChunk.
*/
protected int findBytes(ByteChunk bc, byte[] b) {
byte first = b[0];
byte[] buff = bc.getBuffer();
int start = bc.getStart();
int end = bc.getEnd();
// Look for first char
int srcEnd = b.length;
for (int i = start; i <= (end - srcEnd); i++) {
if (Ascii.toLower(buff[i]) != first) continue;
// found first char, now look for a match
int myPos = i+1;
for (int srcPos = 1; srcPos < srcEnd; ) {
if (Ascii.toLower(buff[myPos++]) != b[srcPos++])
break;
if (srcPos == srcEnd) return i - start; // found it
}
}
return -1;
}
}