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comparison text/src/main/java/digilib/servlet/Texter.java @ 905:afd82fe0c48a

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move Texter servlet to its own maven module
author robcast
date Tue, 03 May 2011 12:18:08 +0200
parents servlet2/src/main/java/digilib/servlet/Texter.java@7779b37d1d05
children
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904:4f8f2b9ab539 905:afd82fe0c48a
1 /* Texter.java -- Servlet for displaying text
2 * Digital Image Library servlet components
3 * Copyright (C) 2003 Robert Casties (robcast@mail.berlios.de)
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the Free
7 * Software Foundation; either version 2 of the License, or (at your option)
8 * any later version. Please read license.txt for the full details. A copy of
9 * the GPL may be found at http://www.gnu.org/copyleft/lgpl.html
10 * You should have received a copy of the GNU General Public License along with this
11 * program; if not, write to the Free Software Foundation, Inc., 59 Temple
12 * Place, Suite 330, Boston, MA 02111-1307 USA
13 *
14 * Created on 15.09.2003 by casties
15 */
16
17 package digilib.servlet;
18
19 import java.io.IOException;
20
21 import javax.servlet.ServletConfig;
22 import javax.servlet.ServletContext;
23 import javax.servlet.ServletException;
24 import javax.servlet.http.HttpServlet;
25 import javax.servlet.http.HttpServletRequest;
26 import javax.servlet.http.HttpServletResponse;
27
28 import org.apache.log4j.Logger;
29
30 import digilib.auth.AuthOps;
31 import digilib.image.ImageOpException;
32 import digilib.io.DocuDirCache;
33 import digilib.io.FileOps;
34 import digilib.io.FileOps.FileClass;
35 import digilib.io.TextFile;
36
37 /**
38 * Servlet for displaying text
39 *
40 *
41 * @author casties
42 *
43 */
44 public class Texter extends HttpServlet {
45
46 private static final long serialVersionUID = 6678666342141409867L;
47
48 /** Servlet version */
49 public static String tlVersion = "0.1b3";
50
51 /** DigilibConfiguration instance */
52 DigilibServletConfiguration dlConfig = null;
53
54 /** general logger */
55 Logger logger = Logger.getLogger("digilib.texter");
56
57 /** logger for accounting requests */
58 protected static Logger accountlog = Logger.getLogger("account.texter.request");
59
60 /** FileOps instance */
61 FileOps fileOp;
62
63 /** AuthOps instance */
64 AuthOps authOp;
65
66 /** ServletOps instance */
67 ServletOps servletOp;
68
69 /** DocuDirCache instance */
70 DocuDirCache dirCache;
71
72 /** use authentication */
73 boolean useAuthentication = false;
74
75 /*
76 * (non-Javadoc)
77 *
78 * @see javax.servlet.Servlet#init(javax.servlet.ServletConfig)
79 */
80 public void init(ServletConfig config) throws ServletException {
81 super.init(config);
82
83 System.out.println("***** Digital Image Library Text Servlet (version "
84 + tlVersion + ") *****");
85
86 // get our ServletContext
87 ServletContext context = config.getServletContext();
88 // see if there is a Configuration instance
89 dlConfig = (DigilibServletConfiguration) context
90 .getAttribute("digilib.servlet.configuration");
91 if (dlConfig == null) {
92 // no Configuration
93 throw new ServletException("No Configuration!");
94 }
95 // say hello in the log file
96 logger.info("***** Digital Image Library Text Servlet (version "
97 + tlVersion + ") *****");
98
99 // set our AuthOps
100 useAuthentication = dlConfig.getAsBoolean("use-authorization");
101 authOp = (AuthOps) dlConfig.getValue("servlet.auth.op");
102 // DocuDirCache instance
103 dirCache = (DocuDirCache) dlConfig.getValue("servlet.dir.cache");
104 }
105
106 /*
107 * (non-Javadoc)
108 *
109 * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest,
110 * javax.servlet.http.HttpServletResponse)
111 */
112 protected void doGet(HttpServletRequest request,
113 HttpServletResponse response) throws ServletException, IOException {
114 accountlog.info("GET from " + request.getRemoteAddr());
115 // do the processing
116 processRequest(request, response);
117 }
118
119 /*
120 * (non-Javadoc)
121 *
122 * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest,
123 * javax.servlet.http.HttpServletResponse)
124 */
125 protected void doPost(HttpServletRequest request,
126 HttpServletResponse response) throws ServletException, IOException {
127 accountlog.info("POST from " + request.getRemoteAddr());
128 // do the processing
129 processRequest(request, response);
130 }
131
132 protected void processRequest(HttpServletRequest request,
133 HttpServletResponse response) {
134
135 /*
136 * request parameters
137 */
138 // create new request with defaults
139 DigilibServletRequest dlRequest = new DigilibServletRequest(request);
140 try {
141
142 /*
143 * find the file to load/send
144 */
145 TextFile f = getTextFile(dlRequest, "/txt");
146 if (f != null) {
147 ServletOps.sendFile(f.getFile(), null, null, response, logger);
148 } else {
149 f = getTextFile(dlRequest, "");
150 if (f != null) {
151 ServletOps.sendFile(f.getFile(), null, null, response, logger);
152 } else {
153 response.sendError(HttpServletResponse.SC_NOT_FOUND, "Text-File not found!");
154 //ServletOps.htmlMessage("No Text-File!", response);
155 }
156 }
157
158 } catch (ImageOpException e) {
159 // most likely wrong file format...
160 logger.error("ERROR sending text file: ", e);
161 try {
162 response.sendError(HttpServletResponse.SC_BAD_REQUEST);
163 } catch (IOException e1) {
164 logger.error("ERROR sending error: ", e1);
165 }
166 } catch (IOException e) {
167 logger.error("ERROR sending text file: ", e);
168 }
169 }
170
171
172 /**
173 * Looks for a file in the given subDirectory.
174 *
175 * @param dlRequest
176 * The received request which has the file path.
177 * @param subDirectory
178 * The subDirectory of the file path where the file should
179 * be found.
180 * @return The wanted Textfile or null if there wasn't a file.
181 */
182
183 private TextFile getTextFile(DigilibServletRequest dlRequest, String subDirectory) {
184 String loadPathName = dlRequest.getFilePath() + subDirectory;
185 // find the file(set)
186 return (TextFile) dirCache.getFile(loadPathName, dlRequest.getAsInt("pn"),
187 FileClass.TEXT);
188 }
189 }