001: /*
002: * $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/catalina/core/StandardEngineValve.java,v 1.7 2001/11/10 01:24:20 craigmcc Exp $
003: * $Revision: 1.7 $
004: * $Date: 2001/11/10 01:24:20 $
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.Host;
072: import org.apache.catalina.Request;
073: import org.apache.catalina.Response;
074: import org.apache.catalina.ValveContext;
075: import org.apache.catalina.util.StringManager;
076: import org.apache.catalina.valves.ValveBase;
077:
078: /**
079: * Valve that implements the default basic behavior for the
080: * <code>StandardEngine</code> container implementation.
081: * <p>
082: * <b>USAGE CONSTRAINT</b>: This implementation is likely to be useful only
083: * when processing HTTP requests.
084: *
085: * @author Craig R. McClanahan
086: * @version $Revision: 1.7 $ $Date: 2001/11/10 01:24:20 $
087: */
088:
089: final class StandardEngineValve extends ValveBase {
090:
091: // ----------------------------------------------------- Instance Variables
092:
093: /**
094: * The descriptive information related to this implementation.
095: */
096: private static final String info = "org.apache.catalina.core.StandardEngineValve/1.0";
097:
098: /**
099: * The string manager for this package.
100: */
101: private static final StringManager sm = StringManager
102: .getManager(Constants.Package);
103:
104: // ------------------------------------------------------------- Properties
105:
106: /**
107: * Return descriptive information about this Valve implementation.
108: */
109: public String getInfo() {
110:
111: return (info);
112:
113: }
114:
115: // --------------------------------------------------------- Public Methods
116:
117: /**
118: * Select the appropriate child Host to process this request,
119: * based on the requested server name. If no matching Host can
120: * be found, return an appropriate HTTP error.
121: *
122: * @param request Request to be processed
123: * @param response Response to be produced
124: * @param valveContext Valve context used to forward to the next Valve
125: *
126: * @exception IOException if an input/output error occurred
127: * @exception ServletException if a servlet error occurred
128: */
129: public void invoke(Request request, Response response,
130: ValveContext valveContext) throws IOException,
131: ServletException {
132:
133: // Validate the request and response object types
134: if (!(request.getRequest() instanceof HttpServletRequest)
135: || !(response.getResponse() instanceof HttpServletResponse)) {
136: return; // NOTE - Not much else we can do generically
137: }
138:
139: // Validate that any HTTP/1.1 request included a host header
140: HttpServletRequest hrequest = (HttpServletRequest) request;
141: if ("HTTP/1.1".equals(hrequest.getProtocol())
142: && (hrequest.getServerName() == null)) {
143: ((HttpServletResponse) response.getResponse()).sendError(
144: HttpServletResponse.SC_BAD_REQUEST, sm.getString(
145: "standardEngine.noHostHeader", request
146: .getRequest().getServerName()));
147: return;
148: }
149:
150: // Select the Host to be used for this Request
151: StandardEngine engine = (StandardEngine) getContainer();
152: Host host = (Host) engine.map(request, true);
153: if (host == null) {
154: ((HttpServletResponse) response.getResponse()).sendError(
155: HttpServletResponse.SC_BAD_REQUEST, sm.getString(
156: "standardEngine.noHost", request
157: .getRequest().getServerName()));
158: return;
159: }
160:
161: // Ask this Host to process this request
162: host.invoke(request, response);
163:
164: }
165:
166: }
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