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 /**
18 * Title: PSI Java Framework: UserDialogRequestHandler<p>
19 * Copyright: PSI-BT AG<p>
20 * History:
21 * Date Author What's new
22 * 16.04.2001 VMentzner Created
23 */
24
25 package com.psibt.framework.net;
26 /**
27 * This class implements a RequestHandler for the path "/userdialog/" in the PluggableHTTPServer.
28 * A simple input form is presented in the browser where you can enter a message. This message will be sent
29 * to the PluggableHTTPServer and shown in a JOptionPane MessageDialog.
30 *
31 * @author <a HREF="mailto:V.Mentzner@psi-bt.de">Volker Mentzner</a>
32 */
33 public class UserDialogRequestHandler extends RootRequestHandler {
34
35 private Component parentComponent;
36
37 /**
38 * Creates a new UserDialogRequestHandler object
39 */
40 public UserDialogRequestHandler() {
41 this(null);
42 }
43
44 /**
45 * Creates a new UserDialogRequestHandler object with a parentComponent reference
46 */
47 public UserDialogRequestHandler(Component parentComponent) {
48 this.setTitle("user dialog");
49 this.setDescription("show user dialog");
50 this.setHandledPath("/userdialog/");
51 this.parentComponent = parentComponent;
52 }
53
54 /**
55 * Handles the given request and writes the reply to the given out-stream.
56 *
57 * @param request - client browser request
58 * @param out - Out stream for sending data to client browser
59 * @return if the request was handled by this handler : true, else : false
60 */
61 public boolean handleRequest(String request, Writer out) {
62 String path = "";
63 String query = null;
64 try {
65 URL url = new URL("http://localhost"+request);
66 path = url.getPath();
67 query = url.getQuery();
68 if (path.startsWith(this.getHandledPath()) == false) {
69 return false;
70 }
71
72 out.write("HTTP/1.0 200 OK\r\n");
73 out.write("Content-type: text/html\r\n\r\n");
74 out.write("<HTML><HEAD><TITLE>" + this.getTitle() + "</TITLE></HEAD>\r\n");
75 out.write("<BODY><H1>" + this.getDescription() + "</H1>\r\n");
76 if ((query != null) && (query.length() >= 0)) {
77 int idx = query.indexOf("=");
78 String message = query.substring(idx+1, query.length());
79 // replace '+' by space
80 message = message.replace('+', ' ');
81 // replace hex strings starting with '%' by their values
82 idx = message.indexOf("%");
83 while (idx >= 0) {
84 String sl = message.substring(0, idx);
85 String sm = message.substring(idx+1, idx+3);
86 String sr = message.substring(idx+3, message.length());
87 try {
88 int i = Integer.parseInt(sm, 16);
89 sm = String.valueOf((char)i);
90 }
91 catch (Exception ex) {
92 sm = "";
93 }
94 message = sl + sm + sr;
95 idx = message.indexOf("%");
96 }
97 // show message in a new thread
98 if ((message != null) && (message.length() > 0)) {
99 Thread t = new Thread(new DialogThread(parentComponent, message));
100 t.start();
101 }
102 }
103 out.write("<form name=\"Formular\" ACTION=\""+this.getHandledPath()+"+\" METHOD=\"PUT\">");
104 out.write("<table>\r\n");
105 out.write(" <tr><td>Send message to user</td></tr>\r\n");
106 out.write(" <tr><td><textarea name=\"message\" rows=10 cols=50></textarea></td></tr>\r\n");
107 out.write("</table>\r\n");
108 out.write("<input type=submit value=\"Submit\">");
109 out.write("</form>");
110 out.write("</BODY></HTML>\r\n");
111 out.flush();
112 return true;
113 } catch (Exception ex) {
114 return false;
115 }
116 }
117
118 /**
119 * Internal class to start the user dialog in a new thread. This makes the RequestHandler return
120 * immediatly
121 */
122 class DialogThread implements Runnable {
123 private Component parentComponent;
124 private String message;
125
126 public DialogThread(Component parentComponent, String message) {
127 this.parentComponent = parentComponent;
128 this.message = message;
129 }
130
131 public void run() {
132 JOptionPane.showMessageDialog(parentComponent, message);
133 }
134 }
135 }
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