336 lines
15 KiB
Java
336 lines
15 KiB
Java
/*************************************************************************
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*
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* The Contents of this file are made available subject to the terms of
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* the BSD license.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*************************************************************************/
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// JDK API
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.BufferedInputStream;
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import java.util.Enumeration;
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// Servlet API
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.ServletOutputStream;
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// Helper API
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import com.oreilly.servlet.MultipartRequest;
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import com.oreilly.servlet.MultipartResponse;
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import com.oreilly.servlet.ServletUtils;
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// UNO API
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import com.sun.star.bridge.XUnoUrlResolver;
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import com.sun.star.uno.XComponentContext;
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import com.sun.star.uno.UnoRuntime;
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import com.sun.star.frame.XComponentLoader;
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import com.sun.star.frame.XStorable;
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import com.sun.star.util.XCloseable;
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import com.sun.star.beans.PropertyValue;
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import com.sun.star.beans.XPropertySet;
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import com.sun.star.lang.XComponent;
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import com.sun.star.lang.XMultiComponentFactory;
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/** This class implements a http servlet in order to convert an incoming document
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* with help of a running OpenOffice.org and to push the converted file back
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* to the client.
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*/
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public class ConverterServlet extends HttpServlet {
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/** Specifies the temporary directory on the web server.
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*/
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private String stringWorkingDirectory =
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System.getProperty( "java.io.tmpdir" ).replace( '\\', '/' );
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/** Specifies the host for the office server.
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*/
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private String stringHost = "localhost";
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/** Specifies the port for the office server.
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*/
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private String stringPort = "2083";
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/** Called by the server (via the service method) to allow a servlet to handle
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* a POST request. The file from the client will be uploaded to the web server
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* and converted on the web server and after all pushed to the client.
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* @param request Object that contains the request the client has made of the servlet.
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* @param response Object that contains the response the servlet sends to the client.
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* @throws ServletException If the request for the POST could not be handled.
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* @throws IOException If an input or output error is detected when the servlet handles the request.
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*/
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protected void doPost( HttpServletRequest request,
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HttpServletResponse response) throws ServletException, java.io.IOException {
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try {
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// If necessary, add a slash to the end of the string.
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if ( !stringWorkingDirectory.endsWith( "/" ) ) {
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stringWorkingDirectory += "/";
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}
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// Construct a MultipartRequest to help read the information.
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// Pass in the request, a directory to save files to, and the
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// maximum POST size we should attempt to handle.
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MultipartRequest multipartrequest =
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new MultipartRequest( request, stringWorkingDirectory, 5 * 1024 * 1024 );
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// Getting all file names from the request
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Enumeration files = multipartrequest.getFileNames();
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// Every received file will be converted to the specified type
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while (files.hasMoreElements()) {
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// Getting the name from the element
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String stringName = (String)files.nextElement();
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// Getting the filename from the request
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String stringFilename =
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multipartrequest.getFilesystemName( stringName );
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// Converting the given file on the server to the specified type and
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// append a special extension
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File cleanupFile = null;
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String stringSourceFile = stringWorkingDirectory + stringFilename;
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try {
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String stringConvertedFile = convertDocument(stringSourceFile,
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multipartrequest.getParameter( "converttype" ),
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multipartrequest.getParameter( "extension" ));
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String shortFileName = stringConvertedFile.substring(
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stringConvertedFile.lastIndexOf('/') + 1);
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// Set the response header
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// Set the filename, is used when the file will be saved (problem with mozilla)
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response.addHeader( "Content-Disposition",
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"attachment; filename=" + shortFileName);
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// Constructing the multi part response to the client
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MultipartResponse multipartresponse = new MultipartResponse(response);
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// Is the convert type HTML?
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if ( ( multipartrequest.getParameter( "converttype" ).equals(
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"swriter: HTML (StarWriter)" ) )
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|| ( multipartrequest.getParameter( "converttype" ).equals(
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"scalc: HTML (StarCalc)" ) ) ) {
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// Setting the content type of the response being sent to the client
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// to text
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multipartresponse.startResponse( "text/html" );
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} else {
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// Setting the content type of the response being sent to the client
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// to application/octet-stream so that file will open a dialog box
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// at the client in order to save the converted file
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multipartresponse.startResponse( "application/octet-stream" );
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}
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// Pushing the converted file to the client
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ServletUtils.returnFile( stringConvertedFile,
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response.getOutputStream() );
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// Finishing the multi part response
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multipartresponse.finish();
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// clean up the working directory
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cleanupFile = new File(stringConvertedFile);
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if ( cleanupFile.exists() )
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cleanupFile.delete();
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} catch (Exception exc) {
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response.setContentType( "text/html;charset=8859-1" );
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PrintWriter out = response.getWriter();
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exc.printStackTrace();
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out.println( "<html><head>" );
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out.println( " <title>" + "SDK Converter Servlet" + "</title>" );
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out.println( "</head>" );
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out.println( "<body><br><p>");
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out.println( "<b>Sorry, the conversion failed!</b></p>");
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out.println( "<p><b>Error Mesage:</b><br>" + exc.getMessage() + "<br>");
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exc.printStackTrace(out);
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out.println( "</p></body><html>");
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}
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// clean up the working directory
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cleanupFile = new File(stringSourceFile);
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if ( cleanupFile.exists() )
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cleanupFile.delete();
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}
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}
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catch (Exception exception) {
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System.err.println( exception.toString() );
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}
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}
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/** This method converts a document to a given type by using a running
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* OpenOffice.org and saves the converted document to the specified
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* working directory.
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* @param stringDocumentName The full path name of the file on the server to be converted.
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* @param stringConvertType Type to convert to.
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* @param stringExtension This string will be appended to the file name of the converted file.
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* @return The full path name of the converted file will be returned.
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* @see stringWorkingDirectory
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*/
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private String convertDocument( String stringDocumentName,
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String stringConvertType,
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String stringExtension)
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throws Exception
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{
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String stringConvertedFile = "";
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// Converting the document to the favoured type
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// try {
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// Composing the URL
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String stringUrl = "file:///" + stringDocumentName;
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/* Bootstraps a component context with the jurt base components
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registered. Component context to be granted to a component for running.
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Arbitrary values can be retrieved from the context. */
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XComponentContext xcomponentcontext =
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com.sun.star.comp.helper.Bootstrap.createInitialComponentContext( null );
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/* Gets the service manager instance to be used (or null). This method has
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been added for convenience, because the service manager is a often used
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object. */
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XMultiComponentFactory xmulticomponentfactory =
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xcomponentcontext.getServiceManager();
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/* Creates an instance of the component UnoUrlResolver which
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supports the services specified by the factory. */
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Object objectUrlResolver =
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xmulticomponentfactory.createInstanceWithContext(
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"com.sun.star.bridge.UnoUrlResolver", xcomponentcontext );
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// Create a new url resolver
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XUnoUrlResolver xurlresolver = ( XUnoUrlResolver )
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UnoRuntime.queryInterface( XUnoUrlResolver.class,
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objectUrlResolver );
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// Resolves an object that is specified as follow:
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// uno:<connection description>;<protocol description>;<initial object name>
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Object objectInitial = xurlresolver.resolve(
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"uno:socket,host=" + stringHost + ",port=" + stringPort +
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";urp;StarOffice.ServiceManager" );
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// Create a service manager from the initial object
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xmulticomponentfactory = ( XMultiComponentFactory )
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UnoRuntime.queryInterface( XMultiComponentFactory.class, objectInitial );
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// Query for the XPropertySet interface.
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XPropertySet xpropertysetMultiComponentFactory = ( XPropertySet )
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UnoRuntime.queryInterface( XPropertySet.class, xmulticomponentfactory );
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// Get the default context from the office server.
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Object objectDefaultContext =
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xpropertysetMultiComponentFactory.getPropertyValue( "DefaultContext" );
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// Query for the interface XComponentContext.
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xcomponentcontext = ( XComponentContext ) UnoRuntime.queryInterface(
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XComponentContext.class, objectDefaultContext );
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/* A desktop environment contains tasks with one or more
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frames in which components can be loaded. Desktop is the
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environment for components which can instanciate within
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frames. */
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XComponentLoader xcomponentloader = ( XComponentLoader )
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UnoRuntime.queryInterface( XComponentLoader.class,
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xmulticomponentfactory.createInstanceWithContext(
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"com.sun.star.frame.Desktop", xcomponentcontext ) );
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// Preparing properties for loading the document
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PropertyValue propertyvalue[] = new PropertyValue[ 1 ];
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// Setting the flag for hidding the open document
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propertyvalue[ 0 ] = new PropertyValue();
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propertyvalue[ 0 ].Name = "Hidden";
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propertyvalue[ 0 ].Value = new Boolean(true);
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// Loading the wanted document
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Object objectDocumentToStore =
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xcomponentloader.loadComponentFromURL(
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stringUrl, "_blank", 0, propertyvalue );
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// Getting an object that will offer a simple way to store a document to a URL.
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XStorable xstorable =
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( XStorable ) UnoRuntime.queryInterface( XStorable.class,
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objectDocumentToStore );
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// Preparing properties for converting the document
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propertyvalue = new PropertyValue[ 2 ];
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// Setting the flag for overwriting
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propertyvalue[ 0 ] = new PropertyValue();
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propertyvalue[ 0 ].Name = "Overwrite";
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propertyvalue[ 0 ].Value = new Boolean(true);
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// Setting the filter name
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propertyvalue[ 1 ] = new PropertyValue();
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propertyvalue[ 1 ].Name = "FilterName";
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propertyvalue[ 1 ].Value = stringConvertType;
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// Appending the favoured extension to the origin document name
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int index = stringUrl.lastIndexOf('.');
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if ( index >= 0 ) {
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stringConvertedFile = stringUrl.substring(0, index) + "." + stringExtension;
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} else {
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stringConvertedFile = stringUrl + "." + stringExtension;
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}
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// Storing and converting the document
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xstorable.storeAsURL( stringConvertedFile, propertyvalue );
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XCloseable xcloseable = (XCloseable)UnoRuntime.queryInterface( XCloseable.class,xstorable );
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// Closing the converted document
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if ( xcloseable != null )
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xcloseable.close(false);
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else {
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// If Xcloseable is not supported (older versions,
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// use dispose() for closing the document
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XComponent xComponent = ( XComponent ) UnoRuntime.queryInterface(
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XComponent.class, xstorable );
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xComponent.dispose();
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}
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// }
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// catch( Exception exception ) {
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// exception.printStackTrace();
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// return( "" );
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// }
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if ( stringConvertedFile.startsWith( "file:///" ) ) {
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// Truncating the beginning of the file name
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stringConvertedFile = stringConvertedFile.substring( 8 );
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}
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// Returning the name of the converted file
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return stringConvertedFile;
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}
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}
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