001: /*
002: * $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/catalina/core/StandardHostValve.java,v 1.6 2002/01/04 16:33:40 remm Exp $
003: * $Revision: 1.6 $
004: * $Date: 2002/01/04 16:33:40 $
005: *
006: * ====================================================================
007: *
008: * The Apache Software License, Version 1.1
009: *
010: * Copyright (c) 1999-2001 The Apache Software Foundation. All rights
011: * reserved.
012: *
013: * Redistribution and use in source and binary forms, with or without
014: * modification, are permitted provided that the following conditions
015: * are met:
016: *
017: * 1. Redistributions of source code must retain the above copyright
018: * notice, this list of conditions and the following disclaimer.
019: *
020: * 2. Redistributions in binary form must reproduce the above copyright
021: * notice, this list of conditions and the following disclaimer in
022: * the documentation and/or other materials provided with the
023: * distribution.
024: *
025: * 3. The end-user documentation included with the redistribution, if
026: * any, must include the following acknowlegement:
027: * "This product includes software developed by the
028: * Apache Software Foundation (http://www.apache.org/)."
029: * Alternately, this acknowlegement may appear in the software itself,
030: * if and wherever such third-party acknowlegements normally appear.
031: *
032: * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
033: * Foundation" must not be used to endorse or promote products derived
034: * from this software without prior written permission. For written
035: * permission, please contact apache@apache.org.
036: *
037: * 5. Products derived from this software may not be called "Apache"
038: * nor may "Apache" appear in their names without prior written
039: * permission of the Apache Group.
040: *
041: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
042: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
043: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
044: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
045: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
046: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
047: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
048: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
049: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
050: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
051: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
052: * SUCH DAMAGE.
053: * ====================================================================
054: *
055: * This software consists of voluntary contributions made by many
056: * individuals on behalf of the Apache Software Foundation. For more
057: * information on the Apache Software Foundation, please see
058: * <http://www.apache.org/>.
059: *
060: * [Additional notices, if required by prior licensing conditions]
061: *
062: */
063:
064: package org.apache.catalina.core;
065:
066: import java.io.IOException;
067: import javax.servlet.ServletException;
068: import javax.servlet.http.HttpServletRequest;
069: import javax.servlet.http.HttpServletResponse;
070: import org.apache.catalina.Container;
071: import org.apache.catalina.Context;
072: import org.apache.catalina.Manager;
073: import org.apache.catalina.Request;
074: import org.apache.catalina.Response;
075: import org.apache.catalina.Session;
076: import org.apache.catalina.ValveContext;
077: import org.apache.catalina.util.StringManager;
078: import org.apache.catalina.valves.ValveBase;
079:
080: /**
081: * Valve that implements the default basic behavior for the
082: * <code>StandardHost</code> container implementation.
083: * <p>
084: * <b>USAGE CONSTRAINT</b>: This implementation is likely to be useful only
085: * when processing HTTP requests.
086: *
087: * @author Craig R. McClanahan
088: * @version $Revision: 1.6 $ $Date: 2002/01/04 16:33:40 $
089: */
090:
091: final class StandardHostValve extends ValveBase {
092:
093: // ----------------------------------------------------- Instance Variables
094:
095: /**
096: * The descriptive information related to this implementation.
097: */
098: private static final String info = "org.apache.catalina.core.StandardHostValve/1.0";
099:
100: /**
101: * The string manager for this package.
102: */
103: private static final StringManager sm = StringManager
104: .getManager(Constants.Package);
105:
106: // ------------------------------------------------------------- Properties
107:
108: /**
109: * Return descriptive information about this Valve implementation.
110: */
111: public String getInfo() {
112:
113: return (info);
114:
115: }
116:
117: // --------------------------------------------------------- Public Methods
118:
119: /**
120: * Select the appropriate child Context to process this request,
121: * based on the specified request URI. If no matching Context can
122: * be found, return an appropriate HTTP error.
123: *
124: * @param request Request to be processed
125: * @param response Response to be produced
126: * @param valveContext Valve context used to forward to the next Valve
127: *
128: * @exception IOException if an input/output error occurred
129: * @exception ServletException if a servlet error occurred
130: */
131: public void invoke(Request request, Response response,
132: ValveContext valveContext) throws IOException,
133: ServletException {
134:
135: // Validate the request and response object types
136: if (!(request.getRequest() instanceof HttpServletRequest)
137: || !(response.getResponse() instanceof HttpServletResponse)) {
138: return; // NOTE - Not much else we can do generically
139: }
140:
141: // Select the Context to be used for this Request
142: StandardHost host = (StandardHost) getContainer();
143: Context context = (Context) host.map(request, true);
144: if (context == null) {
145: ((HttpServletResponse) response.getResponse()).sendError(
146: HttpServletResponse.SC_INTERNAL_SERVER_ERROR, sm
147: .getString("standardHost.noContext"));
148: return;
149: }
150:
151: // Bind the context CL to the current thread
152: Thread.currentThread().setContextClassLoader(
153: context.getLoader().getClassLoader());
154:
155: // Update the session last access time for our session (if any)
156: HttpServletRequest hreq = (HttpServletRequest) request
157: .getRequest();
158: String sessionId = hreq.getRequestedSessionId();
159: if (sessionId != null) {
160: Manager manager = context.getManager();
161: if (manager != null) {
162: Session session = manager.findSession(sessionId);
163: if ((session != null) && session.isValid())
164: session.access();
165: }
166: }
167:
168: // Ask this Context to process this request
169: context.invoke(request, response);
170:
171: }
172:
173: }
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