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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
commited5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch)
tree7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /odk/examples/java/ConverterServlet/ConverterServlet.java
parentInitial commit. (diff)
downloadlibreoffice-upstream.tar.xz
libreoffice-upstream.zip
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ *
+ * 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 an 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 instantiate 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;
+ }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */