Source Code Cross Referenced for SSIServlet.java in  » Web-Server » Rimfaxe-Web-Server » org » apache » catalina » ssi » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Server » Rimfaxe Web Server » org.apache.catalina.ssi 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * SSIServlet.java
003:         * $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/catalina/ssi/SSIServlet.java,v 1.1 2002/05/26 00:00:55 remm Exp $
004:         * $Revision: 1.1 $
005:         * $Date: 2002/05/26 00:00:55 $
006:         *
007:         * ====================================================================
008:         *
009:         * The Apache Software License, Version 1.1
010:         *
011:         * Copyright (c) 1999 The Apache Software Foundation.  All rights
012:         * reserved.
013:         *
014:         * Redistribution and use in source and binary forms, with or without
015:         * modification, are permitted provided that the following conditions
016:         * are met:
017:         *
018:         * 1. Redistributions of source code must retain the above copyright
019:         *    notice, this list of conditions and the following disclaimer.
020:         *
021:         * 2. Redistributions in binary form must reproduce the above copyright
022:         *    notice, this list of conditions and the following disclaimer in
023:         *    the documentation and/or other materials provided with the
024:         *    distribution.
025:         *
026:         * 3. The end-user documentation included with the redistribution, if
027:         *    any, must include the following acknowlegement:
028:         *       "This product includes software developed by the
029:         *        Apache Software Foundation (http://www.apache.org/)."
030:         *    Alternately, this acknowlegement may appear in the software itself,
031:         *    if and wherever such third-party acknowlegements normally appear.
032:         *
033:         * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
034:         *    Foundation" must not be used to endorse or promote products derived
035:         *    from this software without prior written permission. For written
036:         *    permission, please contact apache@apache.org.
037:         *
038:         * 5. Products derived from this software may not be called "Apache"
039:         *    nor may "Apache" appear in their names without prior written
040:         *    permission of the Apache Group.
041:         *
042:         * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
043:         * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
044:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
045:         * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
046:         * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
047:         * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
048:         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
049:         * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
050:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
051:         * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
052:         * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
053:         * SUCH DAMAGE.
054:         * ====================================================================
055:         *
056:         * This software consists of voluntary contributions made by many
057:         * individuals on behalf of the Apache Software Foundation.  For more
058:         * information on the Apache Software Foundation, please see
059:         * <http://www.apache.org/>.
060:         *
061:         * [Additional notices, if required by prior licensing conditions]
062:         *
063:         */
064:
065:        package org.apache.catalina.ssi;
066:
067:        import java.io.IOException;
068:        import java.io.InputStream;
069:        import java.io.InputStreamReader;
070:        import java.io.OutputStream;
071:        import java.io.OutputStreamWriter;
072:        import java.io.BufferedInputStream;
073:        import java.io.BufferedReader;
074:        import java.io.ByteArrayOutputStream;
075:        import java.io.PrintWriter;
076:        import java.io.Reader;
077:        import java.io.StringWriter;
078:        import java.io.Writer;
079:        import java.net.URL;
080:        import java.net.URLConnection;
081:        import java.net.URLDecoder;
082:        import java.util.ArrayList;
083:        import java.util.Collection;
084:        import java.util.Date;
085:        import java.util.Enumeration;
086:        import java.util.HashMap;
087:        import java.util.Locale;
088:        import java.text.SimpleDateFormat;
089:        import java.util.StringTokenizer;
090:        import java.util.TimeZone;
091:        import javax.servlet.RequestDispatcher;
092:        import javax.servlet.ServletException;
093:        import javax.servlet.ServletContext;
094:        import javax.servlet.ServletOutputStream;
095:        import javax.servlet.http.HttpServlet;
096:        import javax.servlet.http.HttpServletRequest;
097:        import javax.servlet.http.HttpServletResponse;
098:
099:        /**
100:         * Servlet to process SSI requests within a webpage.
101:         * Mapped to a path from within web.xml.
102:         *
103:         * @author Bip Thelin
104:         * @author Amy Roh
105:         * @author Dan Sandberg
106:         * @version $Revision: 1.1 $, $Date: 2002/05/26 00:00:55 $
107:         */
108:        public class SSIServlet extends HttpServlet {
109:            /** Debug level for this servlet. */
110:            protected int debug = 0;
111:
112:            /** Should the output be buffered. */
113:            protected boolean buffered = false;
114:
115:            /** Expiration time in seconds for the doc. */
116:            protected Long expires = null;
117:
118:            /** virtual path can be webapp-relative */
119:            protected boolean isVirtualWebappRelative = false;
120:
121:            //----------------- Public methods.
122:
123:            /**
124:             * Initialize this servlet.
125:             * @exception ServletException if an error occurs
126:             */
127:            public void init() throws ServletException {
128:                String value = null;
129:                try {
130:                    value = getServletConfig().getInitParameter("debug");
131:                    debug = Integer.parseInt(value);
132:                } catch (Throwable t) {
133:                    ;
134:                }
135:
136:                try {
137:                    value = getServletConfig().getInitParameter(
138:                            "isVirtualWebappRelative");
139:                    isVirtualWebappRelative = Integer.parseInt(value) > 0 ? true
140:                            : false;
141:                } catch (Throwable t) {
142:                    ;
143:                }
144:
145:                try {
146:                    value = getServletConfig().getInitParameter("expires");
147:                    expires = Long.valueOf(value);
148:                } catch (NumberFormatException e) {
149:                    expires = null;
150:                    log("Invalid format for expires initParam; expected integer (seconds)");
151:                } catch (Throwable t) {
152:                    ;
153:                }
154:                try {
155:                    value = getServletConfig().getInitParameter("buffered");
156:                    buffered = Integer.parseInt(value) > 0 ? true : false;
157:                } catch (Throwable t) {
158:                    ;
159:                }
160:                if (debug > 0)
161:                    log("SSIServlet.init() SSI invoker started with 'debug'="
162:                            + debug);
163:            }
164:
165:            /**
166:             * Process and forward the GET request
167:             * to our <code>requestHandler()</code>     *
168:             * @param req a value of type 'HttpServletRequest'
169:             * @param res a value of type 'HttpServletResponse'
170:             * @exception IOException if an error occurs
171:             * @exception ServletException if an error occurs
172:             */
173:            public void doGet(HttpServletRequest req, HttpServletResponse res)
174:                    throws IOException, ServletException {
175:
176:                if (debug > 0)
177:                    log("SSIServlet.doGet()");
178:                requestHandler(req, res);
179:            }
180:
181:            /**
182:             * Process and forward the POST request
183:             * to our <code>requestHandler()</code>.
184:             *
185:             * @param req a value of type 'HttpServletRequest'
186:             * @param res a value of type 'HttpServletResponse'
187:             * @exception IOException if an error occurs
188:             * @exception ServletException if an error occurs
189:             */
190:            public void doPost(HttpServletRequest req, HttpServletResponse res)
191:                    throws IOException, ServletException {
192:
193:                if (debug > 0)
194:                    log("SSIServlet.doPost()");
195:                requestHandler(req, res);
196:            }
197:
198:            /**
199:             * Process our request and locate right SSI command.
200:             * @param req a value of type 'HttpServletRequest'
201:             * @param res a value of type 'HttpServletResponse'
202:             */
203:            protected void requestHandler(HttpServletRequest req,
204:                    HttpServletResponse res) throws IOException,
205:                    ServletException {
206:
207:                ServletContext servletContext = getServletContext();
208:                String path = SSIServletRequestUtil.getRelativePath(req);
209:
210:                if (debug > 0)
211:                    log("SSIServlet.requestHandler()\n" + "Serving "
212:                            + (buffered ? "buffered " : "unbuffered ")
213:                            + "resource '" + path + "'");
214:
215:                // Exclude any resource in the /WEB-INF and /META-INF subdirectories
216:                // (the "toUpperCase()" avoids problems on Windows systems)
217:                if (path == null || path.toUpperCase().startsWith("/WEB-INF")
218:                        || path.toUpperCase().startsWith("/META-INF")) {
219:
220:                    res.sendError(res.SC_NOT_FOUND, path);
221:                    log("Can't serve file: " + path);
222:                    return;
223:                }
224:
225:                URL resource = servletContext.getResource(path);
226:                if (resource == null) {
227:                    res.sendError(res.SC_NOT_FOUND, path);
228:                    log("Can't find file: " + path);
229:                    return;
230:                }
231:
232:                res.setContentType("text/html;charset=UTF-8");
233:
234:                if (expires != null) {
235:                    res.setDateHeader("Expires", (new java.util.Date())
236:                            .getTime()
237:                            + expires.longValue() * 1000);
238:                }
239:
240:                processSSI(req, res, resource);
241:            }
242:
243:            protected void processSSI(HttpServletRequest req,
244:                    HttpServletResponse res, URL resource) throws IOException {
245:                SSIExternalResolver ssiExternalResolver = new SSIServletExternalResolver(
246:                        this , req, res, isVirtualWebappRelative, debug);
247:                SSIProcessor ssiProcessor = new SSIProcessor(
248:                        ssiExternalResolver, debug);
249:
250:                PrintWriter printWriter = null;
251:                StringWriter stringWriter = null;
252:                if (buffered) {
253:                    stringWriter = new StringWriter();
254:                    printWriter = new PrintWriter(stringWriter);
255:                } else {
256:                    printWriter = res.getWriter();
257:                }
258:
259:                URLConnection resourceInfo = resource.openConnection();
260:                InputStream resourceInputStream = resourceInfo.getInputStream();
261:                BufferedReader bufferedReader = new BufferedReader(
262:                        new InputStreamReader(resourceInputStream));
263:                Date lastModifiedDate = new Date(resourceInfo.getLastModified());
264:                ssiProcessor.process(bufferedReader, lastModifiedDate,
265:                        printWriter);
266:
267:                if (buffered) {
268:                    printWriter.flush();
269:                    String text = stringWriter.toString();
270:                    res.getWriter().write(text);
271:                }
272:            }
273:        }
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