1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.util.servlet.filters;
24  
25  import com.liferay.portal.kernel.io.unsync.UnsyncByteArrayOutputStream;
26  import com.liferay.portal.kernel.servlet.HttpHeaders;
27  import com.liferay.util.servlet.Header;
28  
29  import java.io.IOException;
30  import java.io.OutputStreamWriter;
31  import java.io.PrintWriter;
32  
33  import java.util.ArrayList;
34  import java.util.HashMap;
35  import java.util.List;
36  import java.util.Map;
37  
38  import javax.servlet.ServletOutputStream;
39  import javax.servlet.http.HttpServletResponse;
40  import javax.servlet.http.HttpServletResponseWrapper;
41  
42  /**
43   * <a href="CacheResponse.java.html"><b><i>View Source</i></b></a>
44   *
45   * @author Alexander Chow
46   */
47  public class CacheResponse extends HttpServletResponseWrapper {
48  
49      public CacheResponse(HttpServletResponse response, String encoding) {
50          super(response);
51  
52          _encoding = encoding;
53      }
54  
55      public void addDateHeader(String name, long value) {
56          List<Header> values = _headers.get(name);
57  
58          if (values == null) {
59              values = new ArrayList<Header>();
60  
61              _headers.put(name, values);
62          }
63  
64          Header header = new Header();
65  
66          header.setType(Header.DATE_TYPE);
67          header.setDateValue(value);
68  
69          values.add(header);
70      }
71  
72      public void addHeader(String name, String value) {
73          List<Header> values = _headers.get(name);
74  
75          if (values == null) {
76              values = new ArrayList<Header>();
77  
78              _headers.put(name, values);
79          }
80  
81          Header header = new Header();
82  
83          header.setType(Header.STRING_TYPE);
84          header.setStringValue(value);
85  
86          values.add(header);
87  
88          if (name.equals(HttpHeaders.CONTENT_TYPE)) {
89              setContentType(value);
90          }
91      }
92  
93      public void addIntHeader(String name, int value) {
94          List<Header> values = _headers.get(name);
95  
96          if (values == null) {
97              values = new ArrayList<Header>();
98  
99              _headers.put(name, values);
100         }
101 
102         Header header = new Header();
103 
104         header.setType(Header.INTEGER_TYPE);
105         header.setIntValue(value);
106 
107         values.add(header);
108     }
109 
110     public void finishResponse() {
111         try {
112             if (_writer != null) {
113                 _writer.close();
114             }
115             else if (_stream != null) {
116                 _stream.close();
117             }
118         }
119         catch (IOException e) {
120         }
121     }
122 
123     public void flushBuffer() throws IOException {
124         if (_stream != null) {
125             _stream.flush();
126         }
127     }
128 
129     public int getBufferSize() {
130         return _bufferSize;
131     }
132 
133     public String getContentType() {
134         return _contentType;
135     }
136 
137     public byte[] getData() {
138         finishResponse();
139 
140         return _ubaos.toByteArray();
141     }
142 
143     public String getHeader(String name) {
144         List<Header> values = _headers.get(name);
145 
146         if ((values == null) || values.isEmpty()) {
147             return null;
148         }
149 
150         Header header = values.get(0);
151 
152         return header.toString();
153     }
154 
155     public Map<String, List<Header>> getHeaders() {
156         return _headers;
157     }
158 
159     public ServletOutputStream getOutputStream() {
160         if (_writer != null) {
161             throw new IllegalStateException();
162         }
163 
164         if (_stream == null) {
165             _stream = createOutputStream();
166         }
167 
168         return _stream;
169     }
170 
171     public int getStatus() {
172         return _status;
173     }
174 
175     public PrintWriter getWriter() throws IOException {
176         if (_writer != null) {
177             return _writer;
178         }
179 
180         if (_stream != null) {
181             throw new IllegalStateException();
182         }
183 
184         _stream = createOutputStream();
185 
186         _writer = new PrintWriter(new OutputStreamWriter(
187             //_stream, _res.getCharacterEncoding()));
188             _stream, _encoding));
189 
190         return _writer;
191     }
192 
193     public boolean isCommitted() {
194         if (_writer != null) {
195             return true;
196         }
197 
198         if ((_stream != null) && _stream.isClosed()) {
199             return true;
200         }
201 
202         return super.isCommitted();
203     }
204 
205     public void sendError(int status) throws IOException {
206         _status = status;
207 
208         super.sendError(status);
209     }
210 
211     public void sendError(int status, String msg) throws IOException {
212         _status = status;
213 
214         super.sendError(status, msg);
215     }
216 
217     public void setBufferSize(int bufferSize) {
218         _bufferSize = bufferSize;
219     }
220 
221     public void setContentType(String contentType) {
222         _contentType = contentType;
223 
224         super.setContentType(contentType);
225     }
226 
227     public void setDateHeader(String name, long value) {
228         List<Header> values = new ArrayList<Header>();
229 
230         _headers.put(name, values);
231 
232         Header header = new Header();
233 
234         header.setType(Header.DATE_TYPE);
235         header.setDateValue(value);
236 
237         values.add(header);
238     }
239 
240     public void setHeader(String name, String value) {
241         List<Header> values = new ArrayList<Header>();
242 
243         _headers.put(name, values);
244 
245         Header header = new Header();
246 
247         header.setType(Header.STRING_TYPE);
248         header.setStringValue(value);
249 
250         values.add(header);
251 
252         if (name.equals(HttpHeaders.CONTENT_TYPE)) {
253             setContentType(value);
254         }
255     }
256 
257     public void setIntHeader(String name, int value) {
258         List<Header> values = new ArrayList<Header>();
259 
260         _headers.put(name, values);
261 
262         Header header = new Header();
263 
264         header.setType(Header.INTEGER_TYPE);
265         header.setIntValue(value);
266 
267         values.add(header);
268     }
269 
270     public void setStatus(int status) {
271         _status = status;
272 
273         super.setStatus(status);
274     }
275 
276     protected CacheResponseStream createOutputStream() {
277         return new CacheResponseStream(_ubaos);
278     }
279 
280     private int _bufferSize;
281     private String _contentType;
282     private String _encoding;
283     private Map<String, List<Header>> _headers =
284         new HashMap<String, List<Header>>();
285     private int _status = HttpServletResponse.SC_OK;
286     private CacheResponseStream _stream;
287     private UnsyncByteArrayOutputStream _ubaos =
288         new UnsyncByteArrayOutputStream();
289     private PrintWriter _writer;
290 
291 }