contrib/servlet/src/FopServlet.java - xmlgraphics-fop - Git at Google

 /*
  * $Id$
  * Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
  * For details on use and redistribution please refer to the
  * LICENSE file included with these sources.
  */

 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;
 import org.apache.fop.apps.XSLTInputHandler;
 import org.apache.fop.messaging.MessageHandler;

 import org.apache.avalon.framework.logger.ConsoleLogger;
 import org.apache.avalon.framework.logger.Logger;

 /**
  * 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/fop/servlet/FopServlet?fo=readme.fo
  * Example URL: http://servername/fop/servlet/FopServlet?xml=data.xml&xsl=format.xsl
  * Compiling: you will need
  * - servlet_2_2.jar
  * - fop.jar
  * - sax api
  * - avalon-framework-x.jar (where x is the version found the FOP lib dir)
  *
  * Running: you will need in the WEB-INF/lib/ directory:
  * - fop.jar
  * - batik.jar
  * - xalan-2.0.0.jar
  * - avalon-framework-x.jar (where x is the version found the FOP lib dir)
  */
 public class FopServlet extends HttpServlet {
     public static final String FO_REQUEST_PARAM = "fo";
     public static final String XML_REQUEST_PARAM = "xml";
     public static final String XSL_REQUEST_PARAM = "xsl";
     Logger log = null;

     public void doGet(HttpServletRequest request,
                       HttpServletResponse response) throws ServletException {
         if (log == null) {
             log = new ConsoleLogger(ConsoleLogger.LEVEL_WARN);
             MessageHandler.setScreenLogger(log);
         }
         try {
             String foParam = request.getParameter(FO_REQUEST_PARAM);
             String xmlParam = request.getParameter(XML_REQUEST_PARAM);
             String xslParam = request.getParameter(XSL_REQUEST_PARAM);

             if (foParam != null) {
                 File fofile = new File(foParam);
                 //log.warn("FO: "+fofile.getCanonicalPath());
                 FileInputStream file = new FileInputStream(fofile);
                 renderFO(new InputSource(file), response);
             } else if ((xmlParam != null) && (xslParam != null)) {
                 XSLTInputHandler input =
                   new XSLTInputHandler(new File(xmlParam),
                                        new File(xslParam));
                 renderXML(input, 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 written
      * 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.setLogger(log);
             driver.setRenderer(Driver.RENDER_PDF);
             driver.run();

             byte[] content = out.toByteArray();
             response.setContentLength(content.length);
             response.getOutputStream().write(content);
             response.getOutputStream().flush();
         } catch (Exception ex) {
             throw new ServletException(ex);
         }
     }

     /**
      * Renders an XML file into a PDF file by applying a stylesheet
      * that converts the XML to XSL:FO. The PDF is written
      * directly to the response object's OutputStream
      */
     public void renderXML(XSLTInputHandler input,
                           HttpServletResponse response) throws ServletException {
         try {
             ByteArrayOutputStream out = new ByteArrayOutputStream();

             response.setContentType("application/pdf");

             Driver driver = new Driver();
             driver.setLogger(log);
             driver.setRenderer(Driver.RENDER_PDF);
             driver.setOutputStream(out);
             driver.render(input.getParser(), input.getInputSource());

             byte[] content = out.toByteArray();
             response.setContentLength(content.length);
             response.getOutputStream().write(content);
             response.getOutputStream().flush();
         } catch (Exception ex) {
             throw new ServletException(ex);
         }
     }

 }
	/*
	* $Id$
	* Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
	* For details on use and redistribution please refer to the
	* LICENSE file included with these sources.
	*/

	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;
	import org.apache.fop.apps.XSLTInputHandler;
	import org.apache.fop.messaging.MessageHandler;

	import org.apache.avalon.framework.logger.ConsoleLogger;
	import org.apache.avalon.framework.logger.Logger;

	/**
	* 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/fop/servlet/FopServlet?fo=readme.fo
	* Example URL: http://servername/fop/servlet/FopServlet?xml=data.xml&xsl=format.xsl
	* Compiling: you will need
	* - servlet_2_2.jar
	* - fop.jar
	* - sax api
	* - avalon-framework-x.jar (where x is the version found the FOP lib dir)
	*
	* Running: you will need in the WEB-INF/lib/ directory:
	* - fop.jar
	* - batik.jar
	* - xalan-2.0.0.jar
	* - avalon-framework-x.jar (where x is the version found the FOP lib dir)
	*/
	public class FopServlet extends HttpServlet {
	public static final String FO_REQUEST_PARAM = "fo";
	public static final String XML_REQUEST_PARAM = "xml";
	public static final String XSL_REQUEST_PARAM = "xsl";
	Logger log = null;

	public void doGet(HttpServletRequest request,
	HttpServletResponse response) throws ServletException {
	if (log == null) {
	log = new ConsoleLogger(ConsoleLogger.LEVEL_WARN);
	MessageHandler.setScreenLogger(log);
	}
	try {
	String foParam = request.getParameter(FO_REQUEST_PARAM);
	String xmlParam = request.getParameter(XML_REQUEST_PARAM);
	String xslParam = request.getParameter(XSL_REQUEST_PARAM);

	if (foParam != null) {
	File fofile = new File(foParam);
	//log.warn("FO: "+fofile.getCanonicalPath());
	FileInputStream file = new FileInputStream(fofile);
	renderFO(new InputSource(file), response);
	} else if ((xmlParam != null) && (xslParam != null)) {
	XSLTInputHandler input =
	new XSLTInputHandler(new File(xmlParam),
	new File(xslParam));
	renderXML(input, 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 written
	* 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.setLogger(log);
	driver.setRenderer(Driver.RENDER_PDF);
	driver.run();

	byte[] content = out.toByteArray();
	response.setContentLength(content.length);
	response.getOutputStream().write(content);
	response.getOutputStream().flush();
	} catch (Exception ex) {
	throw new ServletException(ex);
	}
	}

	/**
	* Renders an XML file into a PDF file by applying a stylesheet
	* that converts the XML to XSL:FO. The PDF is written
	* directly to the response object's OutputStream
	*/
	public void renderXML(XSLTInputHandler input,
	HttpServletResponse response) throws ServletException {
	try {
	ByteArrayOutputStream out = new ByteArrayOutputStream();

	response.setContentType("application/pdf");

	Driver driver = new Driver();
	driver.setLogger(log);
	driver.setRenderer(Driver.RENDER_PDF);
	driver.setOutputStream(out);
	driver.render(input.getParser(), input.getInputSource());

	byte[] content = out.toByteArray();
	response.setContentLength(content.length);
	response.getOutputStream().write(content);
	response.getOutputStream().flush();
	} catch (Exception ex) {
	throw new ServletException(ex);
	}
	}

	}