summaryrefslogtreecommitdiff
path: root/odk/examples/java/ConverterServlet/ConverterServlet.java
blob: 2f60077d92d0d3b4a4b24fbff5d777d712e0b017 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
/*************************************************************************
 *
 *  The Contents of this file are made available subject to the terms of
 *  the BSD license.
 *
 *  Copyright 2000, 2010 Oracle and/or its affiliates.
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of Sun Microsystems, Inc. nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *************************************************************************/

// JDK API
import java.io.IOException;
import java.io.PrintWriter;
import java.io.File;
import java.util.Enumeration;

// Servlet API
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
// Helper API
import com.oreilly.servlet.MultipartRequest;
import com.oreilly.servlet.MultipartResponse;
import com.oreilly.servlet.ServletUtils;

// UNO API
import com.sun.star.bridge.XUnoUrlResolver;
import com.sun.star.uno.XComponentContext;
import com.sun.star.uno.UnoRuntime;
import com.sun.star.frame.XComponentLoader;
import com.sun.star.frame.XStorable;
import com.sun.star.util.XCloseable;
import com.sun.star.beans.PropertyValue;
import com.sun.star.beans.XPropertySet;
import com.sun.star.lang.XComponent;
import com.sun.star.lang.XMultiComponentFactory;


/** This class implements a http servlet in order to convert an incoming document
 * with help of a running OpenOffice.org and to push the converted file back
 * to the client.
 */
public class ConverterServlet extends HttpServlet {
    /** Specifies the temporary directory on the web server.
     */
    private String stringWorkingDirectory = System.getProperty( "java.io.tmpdir" ).replace( '\\', '/' );

    /** Specifies the host for the office server.
     */
    private static final String stringHost = "localhost";

    /** Specifies the port for the office server.
     */
    private static final String stringPort = "2083";

    /** Called by the server (via the service method) to allow a servlet to handle
     * a POST request. The file from the client will be uploaded to the web server
     * and converted on the web server and after all pushed to the client.
     * @param request Object that contains the request the client has made of the servlet.
     * @param response Object that contains the response the servlet sends to the client.
     * @throws ServletException If the request for the POST could not be handled.
     * @throws IOException If an input or output error is detected when the servlet handles the request.
     */
    @Override
    protected void doPost( HttpServletRequest request,
                           HttpServletResponse response) throws ServletException, java.io.IOException {
        try {
            // If necessary, add a slash to the end of the string.
            if ( !stringWorkingDirectory.endsWith( "/" ) ) {
                stringWorkingDirectory += "/";
            }

            // Construct a MultipartRequest to help read the information.
            // Pass in the request, a directory to save files to, and the
            // maximum POST size we should attempt to handle.
            MultipartRequest multipartrequest =
                new MultipartRequest( request, stringWorkingDirectory, 5 * 1024 * 1024 );

            // Getting all file names from the request
            Enumeration files = multipartrequest.getFileNames();

            // Every received file will be converted to the specified type
            while (files.hasMoreElements()) {
                // Getting the name from the element
                String stringName = (String)files.nextElement();

                // Getting the filename from the request
                String stringFilename =
                    multipartrequest.getFilesystemName( stringName );

                // Converting the given file on the server to the specified type and
                // append a special extension
                File cleanupFile = null;
                String stringSourceFile = stringWorkingDirectory + stringFilename;

                try {
                    String stringConvertedFile = convertDocument(stringSourceFile,
                        multipartrequest.getParameter( "converttype" ),
                        multipartrequest.getParameter( "extension" ));

                    String shortFileName = stringConvertedFile.substring(
                        stringConvertedFile.lastIndexOf('/') + 1);

                    // Set the response header
                    // Set the filename, is used when the file will be saved (problem with mozilla)
                    response.addHeader( "Content-Disposition",
                                        "attachment; filename=" + shortFileName);

                    // Constructing the multi part response to the client
                    MultipartResponse multipartresponse = new MultipartResponse(response);

                    // Is the convert type HTML?
                    if ( ( multipartrequest.getParameter( "converttype" ).equals(
                               "swriter: HTML (StarWriter)" ) )
                         || ( multipartrequest.getParameter( "converttype" ).equals(
                                  "scalc: HTML (StarCalc)" ) ) ) {
                        // Setting the content type of the response being sent to the client
                        // to text
                        multipartresponse.startResponse( "text/html" );
                    } else {
                        // Setting the content type of the response being sent to the client
                        // to application/octet-stream so that file will open a dialog box
                        // at the client in order to save the converted file
                        multipartresponse.startResponse( "application/octet-stream" );
                    }

                    // Pushing the converted file to the client
                    ServletUtils.returnFile( stringConvertedFile,
                                             response.getOutputStream() );

                    // Finishing the multi part response
                    multipartresponse.finish();

                    // clean up the working directory
                    cleanupFile = new File(stringConvertedFile);
                    if ( cleanupFile.exists() )
                        cleanupFile.delete();

                } catch (Exception exc) {
                    response.setContentType( "text/html;charset=8859-1" );
                    PrintWriter out = response.getWriter();

                    exc.printStackTrace();

                    out.println( "<html><head>" );
                    out.println( " <title>" + "SDK Converter Servlet" + "</title>" );
                    out.println( "</head>" );
                    out.println( "<body><br><p>");
                    out.println( "<b>Sorry, the conversion failed!</b></p>");
                    out.println( "<p><b>Error Message:</b><br>" + exc.getMessage() + "<br>");
                    exc.printStackTrace(out);
                    out.println( "</p></body><html>");
                }

                // clean up the working directory
                cleanupFile = new File(stringSourceFile);
                if ( cleanupFile.exists() )
                    cleanupFile.delete();
            }
        }
        catch (Exception exception) {
            System.err.println( exception.toString() );
        }
    }

    /** This method converts a document to a given type by using a running
     * OpenOffice.org and saves the converted document to the specified
     * working directory.
     * @param stringDocumentName The full path name of the file on the server to be converted.
     * @param stringConvertType Type to convert to.
     * @param stringExtension This string will be appended to the file name of the converted file.
     * @return The full path name of the converted file will be returned.
     * @see stringWorkingDirectory
     */
    private String convertDocument( String stringDocumentName,
                                    String stringConvertType,
                                    String stringExtension)
        throws Exception
    {
        String stringConvertedFile = "";

        // Converting the document to the favoured type
//         try {
            // Composing the URL
            String stringUrl = "file:///" + stringDocumentName;

            /* Bootstraps a component context with the jurt base components
               registered. Component context to be granted to a component for running.
               Arbitrary values can be retrieved from the context. */
            XComponentContext xcomponentcontext =
                com.sun.star.comp.helper.Bootstrap.createInitialComponentContext( null );

            /* Gets the service manager instance to be used (or null). This method has
               been added for convenience, because the service manager is a often used
               object. */
            XMultiComponentFactory xmulticomponentfactory =
                xcomponentcontext.getServiceManager();

            /* Creates an instance of the component UnoUrlResolver which
               supports the services specified by the factory. */
            Object objectUrlResolver =
                xmulticomponentfactory.createInstanceWithContext(
                    "com.sun.star.bridge.UnoUrlResolver", xcomponentcontext );

            // Create a new url resolver
            XUnoUrlResolver xurlresolver = UnoRuntime.queryInterface( XUnoUrlResolver.class,
                                       objectUrlResolver );

            // Resolves an object that is specified as follow:
            // uno:<connection description>;<protocol description>;<initial object name>
            Object objectInitial = xurlresolver.resolve(
                "uno:socket,host=" + stringHost + ",port=" + stringPort +
                ";urp;StarOffice.ServiceManager" );

            // Create a service manager from the initial object
            xmulticomponentfactory = UnoRuntime.queryInterface( XMultiComponentFactory.class, objectInitial );

            // Query for the XPropertySet interface.
            XPropertySet xpropertysetMultiComponentFactory = UnoRuntime.queryInterface( XPropertySet.class, xmulticomponentfactory );

            // Get the default context from the office server.
            Object objectDefaultContext =
                xpropertysetMultiComponentFactory.getPropertyValue( "DefaultContext" );

            // Query for the interface XComponentContext.
            xcomponentcontext = UnoRuntime.queryInterface(
                XComponentContext.class, objectDefaultContext );

            /* A desktop environment contains tasks with one or more
               frames in which components can be loaded. Desktop is the
               environment for components which can instanciate within
               frames. */
            XComponentLoader xcomponentloader = UnoRuntime.queryInterface( XComponentLoader.class,
                                       xmulticomponentfactory.createInstanceWithContext(
                                           "com.sun.star.frame.Desktop", xcomponentcontext ) );

            // Preparing properties for loading the document
            PropertyValue propertyvalue[] = new PropertyValue[ 1 ];
            // Setting the flag to hide the open document
            propertyvalue[ 0 ] = new PropertyValue();
            propertyvalue[ 0 ].Name = "Hidden";
            propertyvalue[ 0 ].Value = Boolean.TRUE;

            // Loading the wanted document
            Object objectDocumentToStore =
                xcomponentloader.loadComponentFromURL(
                    stringUrl, "_blank", 0, propertyvalue );

            // Getting an object that will offer a simple way to store a document to a URL.
            XStorable xstorable =
                UnoRuntime.queryInterface( XStorable.class,
                                                     objectDocumentToStore );

            // Preparing properties for converting the document
            propertyvalue = new PropertyValue[ 2 ];
            // Setting the flag for overwriting
            propertyvalue[ 0 ] = new PropertyValue();
            propertyvalue[ 0 ].Name = "Overwrite";
            propertyvalue[ 0 ].Value = Boolean.TRUE;
            // Setting the filter name
            propertyvalue[ 1 ] = new PropertyValue();
            propertyvalue[ 1 ].Name = "FilterName";
            propertyvalue[ 1 ].Value = stringConvertType;

            // Appending the favoured extension to the origin document name
            int index = stringUrl.lastIndexOf('.');
            if ( index >= 0 ) {
                stringConvertedFile = stringUrl.substring(0, index) + "." + stringExtension;
            } else {
                stringConvertedFile = stringUrl + "." + stringExtension;
            }

            // Storing and converting the document
            xstorable.storeAsURL( stringConvertedFile, propertyvalue );

            XCloseable xcloseable = UnoRuntime.queryInterface( XCloseable.class,xstorable );

            // Closing the converted document
            if ( xcloseable != null )
                xcloseable.close(false);
            else {
                // If Xcloseable is not supported (older versions,
                // use dispose() for closing the document
                XComponent xComponent = UnoRuntime.queryInterface(
                    XComponent.class, xstorable );
                xComponent.dispose();
            }

        if ( stringConvertedFile.startsWith( "file:///" ) ) {
            // Truncating the beginning of the file name
            stringConvertedFile = stringConvertedFile.substring( 8 );
        }

        // Returning the name of the converted file
        return stringConvertedFile;
    }
}