/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.services.rest.servlet;
import org.exoplatform.container.ExoContainer;
import org.exoplatform.container.web.AbstractHttpServlet;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import org.exoplatform.services.rest.Connector;
import org.exoplatform.services.rest.ContainerResponseWriter;
import org.exoplatform.services.rest.GenericContainerResponse;
import org.exoplatform.services.rest.RequestHandler;
import org.exoplatform.services.rest.impl.ContainerResponse;
import org.exoplatform.services.rest.impl.EnvironmentContext;
import org.exoplatform.services.rest.impl.header.HeaderHelper;
import java.io.IOException;
import java.io.OutputStream;
import java.net.SocketException;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.ext.MessageBodyWriter;
/**
* This servlet is front-end for the REST engine.
*
* @author <a href="mailto:andrew00x@gmail.com">Andrey Parfonov</a>
* @version $Id: $
*/
public class RestServlet extends AbstractHttpServlet implements Connector
{
private static final Log LOG = ExoLogger.getLogger("exo.ws.rest.core.RestServlet");
/**
* Generated by Eclipse.
*/
private static final long serialVersionUID = 2152962763071591181L;
/**
* {@inheritDoc}
*/
@Override
protected void onService(ExoContainer container, HttpServletRequest httpRequest, HttpServletResponse httpResponse)
throws IOException, ServletException
{
RequestHandler requestHandler = (RequestHandler)container.getComponentInstanceOfType(RequestHandler.class);
EnvironmentContext env = new EnvironmentContext();
env.put(HttpServletRequest.class, httpRequest);
env.put(HttpServletResponse.class, httpResponse);
env.put(ServletConfig.class, config);
env.put(ServletContext.class, getServletContext());
try
{
EnvironmentContext.setCurrent(env);
ServletContainerRequest request = new ServletContainerRequest(httpRequest);
ContainerResponse response = new ContainerResponse(new ServletContainerResponseWriter(httpResponse));
requestHandler.handleRequest(request, response);
}
catch (IOException ioe)
{
if (ioe.getClass().getName().equals("org.apache.catalina.connector.ClientAbortException"))
{
LOG.debug("Write socket error!", ioe);
}
else
{
throw new ServletException(ioe);
}
}
catch (Exception e)
{
throw new ServletException(e);
}
finally
{
EnvironmentContext.setCurrent(null);
}
}
/**
* See {@link ContainerResponseWriter}.
*/
class ServletContainerResponseWriter implements ContainerResponseWriter
{
/**
* See {@link HttpServletResponse}.
*/
private HttpServletResponse servletResponse;
/**
* @param response HttpServletResponse
*/
ServletContainerResponseWriter(HttpServletResponse response)
{
this.servletResponse = response;
}
/**
* {@inheritDoc}
*/
@SuppressWarnings("unchecked")
public void writeBody(GenericContainerResponse response, MessageBodyWriter entityWriter) throws IOException
{
Object entity = response.getEntity();
if (entity != null)
{
OutputStream out = servletResponse.getOutputStream();
entityWriter.writeTo(entity, entity.getClass(), response.getEntityType(), null, response.getContentType(),
response.getHttpHeaders(), out);
out.flush();
}
}
/**
* {@inheritDoc}
*/
public void writeHeaders(GenericContainerResponse response) throws IOException
{
if (servletResponse.isCommitted())
return;
servletResponse.setStatus(response.getStatus());
if (response.getHttpHeaders() != null)
{
// content-type and content-length should be preset in headers
for (Map.Entry<String, List<Object>> e : response.getHttpHeaders().entrySet())
{
String name = e.getKey();
for (Object o : e.getValue())
{
String value = null;
if (o != null && (value = HeaderHelper.getHeaderAsString(o)) != null)
servletResponse.addHeader(name, value);
}
}
}
}
}
}