KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > micronova > jsp > tag > PostDataTag


1 /*
2
3 Copyright 2003-2007 MicroNova (R)
4 All rights reserved.
5
6 Redistribution and use in source and binary forms, with or
7 without modification, are permitted provided that the following
8 conditions are met:
9
10     * Redistributions of source code must retain the above copyright
11     notice, this list of conditions and the following disclaimer.
12
13     * Redistributions in binary form must reproduce the above copyright
14     notice, this list of conditions and the following disclaimer in the
15     documentation and/or other materials provided with the distribution.
16
17     * Neither the name of MicroNova nor the names of its contributors
18     may be used to endorse or promote products derived from this
19     software without specific prior written permission.
20
21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 POSSIBILITY OF SUCH DAMAGE.
32
33 */
34
35
36 package com.micronova.jsp.tag;
37
38 import javax.servlet.*;
39 import java.io.*;
40 import com.micronova.util.*;
41 import com.micronova.util.servlet.*;
42
43 /** obtains request data as String */
44
45 public class PostDataTag extends YuzuTag
46 {
47     protected String JavaDoc _contentTypePrefix;
48     protected String JavaDoc _encoding;
49
50     protected final String JavaDoc DEFAULTENCODING = "*iso-8859-1";
51
52     protected void init()
53     {
54         super.init();
55
56         _contentTypePrefix = null;
57         _encoding = null;
58     }
59
60     public void setContentTypePrefix(Object JavaDoc expression) throws Exception JavaDoc
61     {
62         _contentTypePrefix = (String JavaDoc)evaluateAttribute("contentTypePrefix", expression, String JavaDoc.class);
63     }
64
65     public void setEncoding(Object JavaDoc expression) throws Exception JavaDoc
66     {
67         _encoding = (String JavaDoc)evaluateAttribute("encoding", expression, String JavaDoc.class);
68     }
69
70     /** override so no importing is done */
71
72     protected boolean doesImport(Object JavaDoc value)
73     {
74         return false;
75     }
76
77     protected Object JavaDoc prepareValue(Object JavaDoc tagValue) throws Exception JavaDoc
78     {
79         tagValue = super.prepareValue(tagValue);
80
81         if (tagValue == null)
82         {
83             ServletRequest request = pageContext.getRequest();
84
85             if (!(request instanceof DispatchHttpServletRequest))
86             {
87                 String JavaDoc contentTypePrefix = _contentTypePrefix;
88                 
89                 boolean isContentMatched = (contentTypePrefix == null);
90                 
91                 if (!isContentMatched)
92                 {
93                     String JavaDoc contentType = request.getContentType();
94                 
95                     isContentMatched = ((contentType != null) && contentType.startsWith(contentTypePrefix));
96                 }
97
98                 if (isContentMatched)
99                 {
100                     tagValue = request;
101                 }
102             }
103         }
104
105         return tagValue;
106     }
107
108
109     protected Object JavaDoc doDefault(Object JavaDoc value, Object JavaDoc defaultValue, String JavaDoc test) throws Exception JavaDoc
110     {
111         ServletRequest request = pageContext.getRequest();
112
113         if (value == request)
114         {
115             String JavaDoc requestEncoding = request.getCharacterEncoding();
116
117             String JavaDoc encoding = _encoding;
118
119             if (encoding == null)
120             {
121                 encoding = DEFAULTENCODING;
122             }
123
124             if (encoding.startsWith("*"))
125             {
126                 if (requestEncoding != null)
127                 {
128                     encoding = requestEncoding;
129                 }
130                 else
131                 {
132                     encoding = encoding.substring(1);
133                 }
134             }
135
136             Reader reader = null;
137
138             try
139             {
140                 reader = new InputStreamReader(request.getInputStream(), encoding);
141
142                 value = new String JavaDoc(IOUtil.readAll(reader));
143             }
144             catch (Exception JavaDoc e)
145             {
146                 throw e;
147             }
148         }
149
150         return super.doDefault(value, defaultValue, test);
151     }
152 }
153
Popular Tags