1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.catalina.core;
18
19 import java.io.IOException;
20
21 import javax.servlet.RequestDispatcher;
22 import javax.servlet.ServletException;
23 import javax.servlet.http.HttpServletResponse;
24
25 import org.apache.catalina.Wrapper;
26 import org.apache.catalina.connector.Request;
27 import org.apache.catalina.connector.Response;
28 import org.apache.catalina.valves.ValveBase;
29 import org.apache.tomcat.util.buf.MessageBytes;
30 import org.apache.tomcat.util.res.StringManager;
31
32 /**
33 * Valve that implements the default basic behavior for the
34 * <code>StandardContext</code> container implementation.
35 * <p>
36 * <b>USAGE CONSTRAINT</b>: This implementation is likely to be useful only
37 * when processing HTTP requests.
38 *
39 * @author Craig R. McClanahan
40 */
41 final class StandardContextValve extends ValveBase {
42
43 private static final StringManager sm = StringManager.getManager(StandardContextValve.class);
44
45 public StandardContextValve() {
46 super(true);
47 }
48
49
50 /**
51 * Select the appropriate child Wrapper to process this request,
52 * based on the specified request URI. If no matching Wrapper can
53 * be found, return an appropriate HTTP error.
54 *
55 * @param request Request to be processed
56 * @param response Response to be produced
57 *
58 * @exception IOException if an input/output error occurred
59 * @exception ServletException if a servlet error occurred
60 */
61 @Override
62 public final void invoke(Request request, Response response)
63 throws IOException, ServletException {
64
65 // Disallow any direct access to resources under WEB-INF or META-INF
66 MessageBytes requestPathMB = request.getRequestPathMB();
67 if ((requestPathMB.startsWithIgnoreCase("/META-INF/", 0))
68 || (requestPathMB.equalsIgnoreCase("/META-INF"))
69 || (requestPathMB.startsWithIgnoreCase("/WEB-INF/", 0))
70 || (requestPathMB.equalsIgnoreCase("/WEB-INF"))) {
71 response.sendError(HttpServletResponse.SC_NOT_FOUND);
72 return;
73 }
74
75 // Select the Wrapper to be used for this Request
76 Wrapper wrapper = request.getWrapper();
77 if (wrapper == null || wrapper.isUnavailable()) {
78 response.sendError(HttpServletResponse.SC_NOT_FOUND);
79 return;
80 }
81
82 // Acknowledge the request
83 try {
84 response.sendAcknowledgement();
85 } catch (IOException ioe) {
86 container.getLogger().error(sm.getString(
87 "standardContextValve.acknowledgeException"), ioe);
88 request.setAttribute(RequestDispatcher.ERROR_EXCEPTION, ioe);
89 response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
90 return;
91 }
92
93 if (request.isAsyncSupported()) {
94 request.setAsyncSupported(wrapper.getPipeline().isAsyncSupported());
95 }
96 wrapper.getPipeline().getFirst().invoke(request, response);
97 }
98 }
99