/*==========================================================================*\
| $Id: SmartHttpInfoRefsFilter.java,v 1.1 2011/05/13 19:46:57 aallowat Exp $
|*-------------------------------------------------------------------------*|
| Copyright (C) 2011 Virginia Tech
|
| This file is part of Web-CAT.
|
| Web-CAT is free software; you can redistribute it and/or modify
| it under the terms of the GNU Affero General Public License as published
| by the Free Software Foundation; either version 3 of the License, or
| (at your option) any later version.
|
| Web-CAT is distributed in the hope that it will be useful,
| but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
| GNU General Public License for more details.
|
| You should have received a copy of the GNU Affero General Public License
| along with Web-CAT; if not, see <http://www.gnu.org/licenses/>.
\*==========================================================================*/
package org.webcat.core.git.http;
import java.io.IOException;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.transport.PacketLineOut;
import org.eclipse.jgit.transport.RefAdvertiser.PacketLineOutRefAdvertiser;
import org.eclipse.jgit.util.HttpSupport;
import org.jfree.util.Log;
import org.webcat.core.NSMutableDataOutputStream;
import org.webcat.core.http.RequestFilter;
import org.webcat.core.http.RequestFilterChain;
import com.webobjects.appserver.WOMessage;
import com.webobjects.appserver.WORequest;
import com.webobjects.appserver.WOResponse;
//-------------------------------------------------------------------------
/**
* A base class for filters that implement Git Smart HTTP services.
*
* @author Tony Allevato
* @author Last changed by $Author: aallowat $
* @version $Revision: 1.1 $, $Date: 2011/05/13 19:46:57 $
*/
public abstract class SmartHttpInfoRefsFilter implements RequestFilter
{
//~ Constructors ..........................................................
// ----------------------------------------------------------
/**
* Creates a new {@code SmartHTTPInfoRefsFilter} for the specified service.
*
* @param service the service
*/
public SmartHttpInfoRefsFilter(String service)
{
this.service = service;
}
//~ Methods ...............................................................
// ----------------------------------------------------------
/**
* Delegates to the
* {@link #advertise(WORequest, Repository, PacketLineOutRefAdvertiser)}
* method on the class and then appends the advertisement to the response.
*
* @param request the request
* @param response the response
* @param filterChain the filter chain
* @throws Exception if an error occurred
*/
public void filterRequest(WORequest request, WOResponse response,
RequestFilterChain filterChain) throws Exception
{
if (service.equals(request.formValueForKey("service")))
{
try
{
Repository repo =
RepositoryRequestUtils.repositoryFromRequest(request);
response.setHeader("application/x-" + service
+ "-advertisement", HttpSupport.HDR_CONTENT_TYPE);
NSMutableDataOutputStream output =
new NSMutableDataOutputStream();
PacketLineOut lineOut = new PacketLineOut(output);
lineOut.writeString("# service=" + service + "\n");
lineOut.end();
advertise(request, repo,
new PacketLineOutRefAdvertiser(lineOut));
output.close();
response.appendContentData(output.data());
}
catch (IOException e)
{
Log.error("(403) An exception occurred when advertising the "
+ "repository", e);
response.setStatus(WOMessage.HTTP_STATUS_FORBIDDEN);
}
}
else
{
filterChain.filterRequest(request, response);
}
}
// ----------------------------------------------------------
/**
* Generates the advertisements for the service.
*
* @param request the request
* @param repository the repository
* @param advertiser the object used to generate the advertisements
* @throws IOException if an I/O error occurred
*/
protected abstract void advertise(WORequest request, Repository repository,
PacketLineOutRefAdvertiser advertiser) throws IOException;
//~ Static/instance variables .............................................
private String service;
}