/*
* Copyright 1999-2001,2004 The Apache Software Foundation.
*
* 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.apache.catalina.core;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.catalina.Container;
import org.apache.catalina.Context;
import org.apache.catalina.Manager;
import org.apache.catalina.Request;
import org.apache.catalina.Response;
import org.apache.catalina.Session;
import org.apache.catalina.ValveContext;
import org.apache.catalina.util.StringManager;
import org.apache.catalina.valves.ValveBase;
/**
* Valve that implements the default basic behavior for the
* <code>StandardHost</code> container implementation.
* <p>
* <b>USAGE CONSTRAINT</b>: This implementation is likely to be useful only
* when processing HTTP requests.
*
* @author Craig R. McClanahan
* @version $Revision: 1.8 $ $Date: 2004/08/26 21:32:20 $
*/
final class StandardHostValve
extends ValveBase {
// ----------------------------------------------------- Instance Variables
/**
* The descriptive information related to this implementation.
*/
private static final String info =
"org.apache.catalina.core.StandardHostValve/1.0";
/**
* The string manager for this package.
*/
private static final StringManager sm =
StringManager.getManager(Constants.Package);
// ------------------------------------------------------------- Properties
/**
* Return descriptive information about this Valve implementation.
*/
public String getInfo() {
return (info);
}
// --------------------------------------------------------- Public Methods
/**
* Select the appropriate child Context to process this request,
* based on the specified request URI. If no matching Context can
* be found, return an appropriate HTTP error.
*
* @param request Request to be processed
* @param response Response to be produced
* @param valveContext Valve context used to forward to the next Valve
*
* @exception IOException if an input/output error occurred
* @exception ServletException if a servlet error occurred
*/
public void invoke(Request request, Response response,
ValveContext valveContext)
throws IOException, ServletException {
// Validate the request and response object types
if (!(request.getRequest() instanceof HttpServletRequest) ||
!(response.getResponse() instanceof HttpServletResponse)) {
return; // NOTE - Not much else we can do generically
}
// Select the Context to be used for this Request
StandardHost host = (StandardHost) getContainer();
Context context = (Context) host.map(request, true);
if (context == null) {
((HttpServletResponse) response.getResponse()).sendError
(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
sm.getString("standardHost.noContext"));
return;
}
// Bind the context CL to the current thread
Thread.currentThread().setContextClassLoader
(context.getLoader().getClassLoader());
// Update the session last access time for our session (if any)
HttpServletRequest hreq = (HttpServletRequest) request.getRequest();
String sessionId = hreq.getRequestedSessionId();
if (sessionId != null) {
Manager manager = context.getManager();
if (manager != null) {
Session session = manager.findSession(sessionId);
if ((session != null) && session.isValid())
session.access();
}
}
// Ask this Context to process this request
context.invoke(request, response);
Thread.currentThread().setContextClassLoader
(StandardHostValve.class.getClassLoader());
}
}