// ========================================================================
// $Id: AbstractHttpHandler.java,v 1.12 2005/08/13 00:01:26 gregwilkins Exp $
// Copyright 1999-2004 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed 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.openqa.jetty.http.handler;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.commons.logging.Log;
import org.openqa.jetty.log.LogFactory;
import org.openqa.jetty.http.HttpContext;
import org.openqa.jetty.http.HttpFields;
import org.openqa.jetty.http.HttpHandler;
import org.openqa.jetty.http.HttpRequest;
import org.openqa.jetty.http.HttpResponse;
import org.openqa.jetty.util.ByteArrayISO8859Writer;
/* ------------------------------------------------------------ */
/** Base HTTP Handler.
* This No-op handler is a good base for other handlers
*
* @version $Id: AbstractHttpHandler.java,v 1.12 2005/08/13 00:01:26 gregwilkins Exp $
* @author Greg Wilkins (gregw)
*/
abstract public class AbstractHttpHandler implements HttpHandler
{
private static Log log = LogFactory.getLog(AbstractHttpHandler.class);
/* ----------------------------------------------------------------- */
private String _name;
private transient HttpContext _context;
private transient boolean _started=false;
/* ------------------------------------------------------------ */
public void setName(String name)
{
_name=name;
}
/* ------------------------------------------------------------ */
public String getName()
{
if (_name==null)
{
_name=this.getClass().getName();
if (!log.isDebugEnabled())
_name=_name.substring(_name.lastIndexOf('.')+1);
}
return _name;
}
/* ------------------------------------------------------------ */
public HttpContext getHttpContext()
{
return _context;
}
/* ------------------------------------------------------------ */
/** Initialize with a HttpContext.
* Called by addHandler methods of HttpContext.
* @param context Must be the HttpContext of the handler
*/
public void initialize(HttpContext context)
{
if (_context==null)
_context=context;
else if (_context!=context)
throw new IllegalStateException("Can't initialize handler for different context");
}
/* ----------------------------------------------------------------- */
public void start()
throws Exception
{
if (_context==null)
throw new IllegalStateException("No context for "+this);
_started=true;
if(log.isDebugEnabled())log.debug("Started "+this);
}
/* ----------------------------------------------------------------- */
public void stop()
throws InterruptedException
{
_started=false;
if(log.isDebugEnabled())log.debug("Stopped "+this);
}
/* ----------------------------------------------------------------- */
public boolean isStarted()
{
return _started;
}
/* ------------------------------------------------------------ */
public String toString()
{
return getName()+" in "+_context;
}
/* ----------------------------------------------------------------- */
public void handleTrace(HttpRequest request,
HttpResponse response)
throws IOException
{
boolean trace=getHttpContext().getHttpServer().getTrace();
// Handle TRACE by returning request header
response.setField(HttpFields.__ContentType,
HttpFields.__MessageHttp);
if (trace)
{
OutputStream out = response.getOutputStream();
ByteArrayISO8859Writer writer = new ByteArrayISO8859Writer();
writer.write(request.toString());
writer.flush();
response.setIntField(HttpFields.__ContentLength,writer.size());
writer.writeTo(out);
out.flush();
}
request.setHandled(true);
}
}