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Diffstat (limited to 'odk/examples/java/ConverterServlet/ConverterServlet.java')
| -rw-r--r-- | odk/examples/java/ConverterServlet/ConverterServlet.java | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/odk/examples/java/ConverterServlet/ConverterServlet.java b/odk/examples/java/ConverterServlet/ConverterServlet.java new file mode 100644 index 000000000..91380ab86 --- /dev/null +++ b/odk/examples/java/ConverterServlet/ConverterServlet.java @@ -0,0 +1,325 @@ +/* -*- 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: */ |