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- /*-- $Id$ --
-
- ============================================================================
- 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 modifica-
- tion, 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 "Fop" 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 (INCLU-
- DING, 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 created by
- James Tauber <jtauber@jtauber.com>. For more information on the Apache
- Software Foundation, please see <http://www.apache.org/>.
-
- */
-
- package org.apache.fop.tools.servlet;
-
- import java.io.*;
-
- import javax.servlet.*;
- import javax.servlet.http.*;
-
- import org.xml.sax.InputSource;
- import org.xml.sax.XMLReader;
-
- import org.apache.fop.apps.Driver;
- import org.apache.fop.apps.Version;
-
-
- /**
- * Example servlet to generate a PDF from a servlet.
- * Servlet param is:
- * <ul>
- * <li>fo: the path to a formatting object file to render
- * </ul>
- *
- * Example URL: http://servername/servlet/FopServlet?fo=/home/fop/example/readme.fo
- *
- */
-
- public class FopServlet extends HttpServlet
- {
- public static final String FO_REQUEST_PARAM = "fo";
-
- public void doGet(HttpServletRequest request,
- HttpServletResponse response)
- throws ServletException
- {
- try {
- if (request.getParameter(FO_REQUEST_PARAM) != null) {
- FileInputStream file = new FileInputStream(request.getParameter(FO_REQUEST_PARAM));
- renderFO(new InputSource(file), response);
- }
- else {
- PrintWriter out = response.getWriter();
- out.println("<html><head><title>Error</title></head>\n"+
- "<body><h1>FopServlet Error</h1><h3>No 'fo' "+
- "request param given.</body></html>");
- }
- }
- catch (ServletException ex) {
- throw ex;
- }
- catch (Exception ex) {
- throw new ServletException(ex);
- }
- }
-
- /**
- * renders an FO inputsource into a PDF file which is rendered
- * directly to the response object's OutputStream
- */
- public void renderFO(InputSource foFile, HttpServletResponse response)
- throws ServletException
- {
- try {
- ByteArrayOutputStream out = new ByteArrayOutputStream();
-
- response.setContentType("application/pdf");
-
- Driver driver = new Driver(foFile, out);
- driver.run();
-
- byte[] content = out.toByteArray();
- response.setContentLength(content.length);
- response.getOutputStream().write(content);
- response.getOutputStream().flush();
-
- }
- catch (ServletException ex) {
- throw ex;
- }
- catch (Exception ex) {
- throw new ServletException(ex);
- }
-
- }
-
- /**
- * creates a SAX parser, using the value of org.xml.sax.parser
- * defaulting to org.apache.xerces.parsers.SAXParser
- *
- * @return the created SAX parser
- */
- static XMLReader createParser()
- throws ServletException
- {
- String parserClassName = System.getProperty("org.xml.sax.parser");
- if (parserClassName == null) {
- parserClassName = "org.apache.xerces.parsers.SAXParser";
- }
-
- try {
- return (XMLReader) Class.forName(parserClassName).newInstance();
- } catch (Exception e) {
- throw new ServletException(e);
- }
- }
-
- }
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