| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999 The Apache Software Foundation. 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. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR |
| * ITS 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 1999, Lotus |
| * Development Corporation., http://www.lotus.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package servlet; |
| import javax.servlet.*; |
| import javax.servlet.http.*; |
| import java.io.*; |
| import java.util.Enumeration; |
| import java.net.URL; |
| |
| import org.xml.sax.*; |
| import javax.xml.transform.TransformerFactory; |
| import javax.xml.transform.Transformer; |
| import javax.xml.transform.Source; |
| import javax.xml.transform.stream.StreamSource; |
| import javax.xml.transform.stream.StreamResult; |
| |
| /* |
| * This sample takes input parameters in the request URL: a URL |
| * parameter for the XML input, an xslURL parameter for the stylesheet, |
| * and optional stylesheet parameters. |
| * To run the equivalent of SimplestXSLServlet (with the documents in the |
| * servlet document root directory), the request URL is |
| * http://<server/servletpath>servlet.SimpleXSLServlet?URL=file:todo.xml&xslURL=file:todo.xsl |
| * |
| * Using a stylesheet Processing Instruction: |
| * If the XML document includes a stylesheet PI that you want to use, |
| * omit the xslURL parameter. |
| * |
| * Sending stylesheet parameters: |
| * If, for example, a servlet takes a stylesheet parameter named param1 |
| * param1 that you want to set to foo, include param1=foo in the URL. |
| */ |
| |
| public class XSLTServletWithParams extends HttpServlet { |
| |
| public void init(ServletConfig config) throws ServletException |
| { |
| super.init(config); |
| } |
| |
| public void doGet (HttpServletRequest request, |
| HttpServletResponse response) |
| throws ServletException, IOException |
| { |
| // The servlet returns HTML; charset is UTF8. |
| // See ApplyXSLT.getContentType() to get output properties from <xsl:output>. |
| response.setContentType("text/html; charset=UTF-8"); |
| PrintWriter out = response.getWriter(); |
| try |
| { |
| TransformerFactory tFactory = TransformerFactory.newInstance(); |
| // Get params from URL. |
| String xml = getRequestParam(request, "URL"); |
| String xsl = getRequestParam(request, "xslURL"); |
| Source xmlSource = null; |
| Source xslSource = null; |
| Transformer transformer = null; |
| // Get the XML input document. |
| if (xml != null && xml.length()> 0) |
| xmlSource = new StreamSource(new URL(xml).openStream()); |
| // Get the stylesheet. |
| if (xsl != null && xsl.length()> 0) |
| xslSource = new StreamSource(new URL(xsl).openStream()); |
| if (xmlSource != null) // We have an XML input document. |
| { |
| if (xslSource == null) // If no stylesheet, look for PI in XML input document. |
| { |
| String media= null , title = null, charset = null; |
| xslSource = tFactory.getAssociatedStylesheet(xmlSource,media, title, charset); |
| } |
| if (xslSource != null) // Now do we have a stylesheet? |
| { |
| transformer = tFactory.newTransformer(xslSource); |
| setParameters(transformer, request); // Set stylesheet params. |
| // Perform the transformation. |
| transformer.transform(xmlSource, new StreamResult(out)); |
| } |
| else |
| out.write("No Stylesheet!"); |
| } |
| else |
| out.write("No XML Input Document!"); |
| } |
| catch (Exception e) |
| { |
| e.printStackTrace(out); |
| } |
| out.close(); |
| } |
| |
| // Get parameters from the request URL. |
| String getRequestParam(HttpServletRequest request, String param) |
| { |
| if (request != null) |
| { |
| String paramVal = request.getParameter(param); |
| return paramVal; |
| } |
| return null; |
| } |
| |
| // Set stylesheet parameters from the request URL. |
| void setParameters(Transformer transformer, HttpServletRequest request) |
| { |
| Enumeration paramNames = request.getParameterNames(); |
| while (paramNames.hasMoreElements()) |
| { |
| String paramName = (String) paramNames.nextElement(); |
| try |
| { |
| String paramVal = request.getParameter(paramName); |
| if (paramVal != null) |
| transformer.setParameter(paramName, paramVal); |
| } |
| catch (Exception e) |
| { |
| } |
| } |
| } |
| } |