1 files changed, 138 insertions, 0 deletions
diff --git a/contrib/servlet/src/FopServlet.java b/contrib/servlet/src/FopServlet.java
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+++ b/contrib/servlet/src/FopServlet.java
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+/*
+ * $Id$
+ * 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);
+        }
+    }
+
+}