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 com.psibt.framework.net;
18
19 import java.io;
20 import java.net;
21 import java.util;
22 import org.apache.log4j;
23
24 /**
25 * This class implements a RequestHandler for log4j configuration. It serves the "/log4j/" path
26 * in the PluggableHTTPServer. If this path is requested a list of all current log4j categories
27 * with their current priorities is created. All priority settings can be changed by the user
28 * and can be submitted and taken over.
29 *
30 * @author <a HREF="mailto:V.Mentzner@psi-bt.de">Volker Mentzner</a>
31 */
32 public class Log4jRequestHandler extends RootRequestHandler {
33
34 private Priority[] prios = Priority.getAllPossiblePriorities();
35
36 /**
37 * Creates a new Log4jRequestHandler object
38 */
39 public Log4jRequestHandler() {
40 this.setTitle("log4j");
41 this.setDescription("log4j configuration");
42 this.setHandledPath("/log4j/");
43 }
44
45 /**
46 * Handles the given request and writes the reply to the given out-stream.
47 *
48 * @param request - client browser request
49 * @param out - Out stream for sending data to client browser
50 * @return if the request was handled by this handler : true, else : false
51 */
52 public boolean handleRequest(String request, Writer out) {
53 String path = "";
54 String query = null;
55 String name;
56 try {
57 // check request url
58 URL url = new URL("http://localhost"+request);
59 path = url.getPath();
60 query = url.getQuery();
61 if (path.startsWith(this.getHandledPath()) == false) {
62 return false;
63 }
64
65 out.write("HTTP/1.0 200 OK\r\n");
66 out.write("Content-type: text/html\r\n\r\n");
67 out.write("<HTML><HEAD><TITLE>" + this.getTitle() + "</TITLE></HEAD>\r\n");
68 out.write("<BODY><H1>log4j</H1>\r\n");
69 out.write(this.getDescription() + "<br><br>\r\n");
70
71 // handle a request with query
72 if ((query != null) && (query.length() >= 0)) {
73 StringTokenizer st = new StringTokenizer(query, "&");
74 String cmd;
75 String catname;
76 String catval;
77 int idx;
78 while (st.hasMoreTokens()) {
79 cmd = st.nextToken();
80 idx = cmd.indexOf("=");
81 catname = cmd.substring(0, idx);
82 catval = cmd.substring(idx+1, cmd.length());
83 if (catname.equalsIgnoreCase("root"))
84 Category.getRoot().setPriority(Priority.toPriority(catval));
85 else
86 Category.getInstance(catname).setPriority(Priority.toPriority(catval));
87 }
88 }
89
90 // output category information in a form with a simple table
91 out.write("<form name=\"Formular\" ACTION=\""+this.getHandledPath()+"\" METHOD=\"PUT\">");
92 out.write("<table cellpadding=4>\r\n");
93 out.write(" <tr>\r\n");
94 out.write(" <td><b>Category</b></td>\r\n");
95 out.write(" <td><b>Priority</b></td>\r\n");
96 out.write(" <td><b>Appender</b></td>\r\n");
97 out.write(" </tr>\r\n");
98
99 // output for root category
100 Category cat = Category.getRoot();
101 out.write(" <tr><td>root</td>\r\n");
102 out.write(" <td>\r\n");
103 out.write(" <select size=1 name=\""+ cat.getName() +"\">");
104 for (int i = 0; i < prios.length; i++) {
105 if (cat.getChainedPriority().toString().equals(prios[i].toString()))
106 out.write("<option selected>"+prios[i].toString());
107 else
108 out.write("<option>"+prios[i].toString());
109 }
110 out.write("</select>\r\n");
111 out.write(" </td>\r\n");
112 out.write(" <td>\r\n");
113 for (Enumeration apds = cat.getAllAppenders(); apds.hasMoreElements();) {
114 Appender apd = (Appender)apds.nextElement();
115 name = apd.getName();
116 if (name == null)
117 name = "<i>(no name)</i>";
118 out.write(name);
119 if (apd instanceof AppenderSkeleton) {
120 try {
121 AppenderSkeleton apskel = (AppenderSkeleton)apd;
122 out.write(" [" + apskel.getThreshold().toString() + "]");
123 } catch (Exception ex) {
124 }
125 }
126 if (apds.hasMoreElements())
127 out.write(", ");
128 }
129 out.write(" </td>\r\n");
130 out.write(" </tr>\r\n");
131
132 // output for all other categories
133 for (Enumeration en = Category.getCurrentCategories(); en.hasMoreElements();) {
134 cat = (Category)en.nextElement();
135 out.write(" <tr>\r\n");
136 out.write(" <td>" + cat.getName() + "</td>\r\n");
137 out.write(" <td>\r\n");
138 out.write(" <select size=1 name=\""+ cat.getName() +"\">");
139 for (int i = 0; i < prios.length; i++) {
140 if (cat.getChainedPriority().toString().equals(prios[i].toString()))
141 out.write("<option selected>"+prios[i].toString());
142 else
143 out.write("<option>"+prios[i].toString());
144 }
145 out.write("</select>\r\n");
146 out.write(" </td>\r\n");
147 out.write(" <td>\r\n");
148 for (Enumeration apds = cat.getAllAppenders(); apds.hasMoreElements();) {
149 Appender apd = (Appender)apds.nextElement();
150 name = apd.getName();
151 if (name == null)
152 name = "<i>(no name)</i>";
153 out.write(name);
154 if (apd instanceof AppenderSkeleton) {
155 try {
156 AppenderSkeleton apskel = (AppenderSkeleton)apd;
157 out.write(" [" + apskel.getThreshold().toString() + "]");
158 } catch (Exception ex) {
159 }
160 }
161 if (apds.hasMoreElements())
162 out.write(", ");
163 }
164 out.write(" </td>\r\n");
165 out.write(" </tr>\r\n");
166 }
167 out.write("</table>\r\n");
168 out.write("<input type=submit value=\"Submit\">");
169 out.write("</form>");
170 out.write("</BODY></HTML>\r\n");
171 out.flush();
172 return true;
173 } catch (Exception ex) {
174 return false;
175 }
176 }
177 }
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