I wrote my own XML->PDF FOP servlet. Here is the code.
Maris
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import java.io.*;
import java.net.*;
import javax.servlet.*;
import javax.servlet.http.*;
import org.xml.sax.InputSource;
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 lv.datapro.lad.pri.utils.*;
/* this package is added to enable configuration of FOP
by adding Latvian fonts */
import org.apache.fop.configuration.*;
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>
*/
public class FopServlet extends HttpServlet implements SingleThreadModel
{
Logger log = null;
org.apache.log4j.Category log4j = org.apache.log4j.Category.getInstance("LADPRI");
DataAccessSingleton singleton = DataAccessSingleton.getInstance();
String hostNameAndPath = "";
public void doGet(HttpServletRequest request, HttpServletResponse response)
{
XsltThread xsltThread = null;
PipedOutputStream pipedOutput = null;
PipedInputStream pipedInput = null;
if(log == null)
{
log = new ConsoleLogger(ConsoleLogger.LEVEL_WARN);
MessageHandler.setScreenLogger(log);
}
log4j.debug("FopServlet invoked");
try
{
if (this.hostNameAndPath.equals(""))
{
this.hostNameAndPath =
DataAccessSingleton.getEnviromentString("WEB.HOST_NAME_PATH");
}
String configParam = this.hostNameAndPath + request.getParameter("config");
log4j.debug("FopServlet configParam " + configParam);
String xmlParam = this.hostNameAndPath + request.getParameter("xhtml");
log4j.debug("FopServlet xmlParam " + xmlParam);
String xslParam = this.hostNameAndPath + request.getParameter("stils");
log4j.debug("FopServlet xslParam " + xslParam);
String sessionIdParam =
request.getParameter(DataAccessSingleton.SESSION_ID_PARAM);
log4j.debug("FopServlet sessionIdParam " + sessionIdParam);
String jsessionIdParam = request.getParameter("jsessionid");
log4j.debug("FopServlet jsessionIdParam " + jsessionIdParam);
if (jsessionIdParam != null) {
this.hostNameAndPath =
DataAccessSingleton.getEnviromentString("WEB.HOST_NAME_PROXY");
}
ConfigurationReader reader = new ConfigurationReader(new
InputSource(configParam));
reader.start();
if (Utility.stringIsNull(xmlParam) || Utility.stringIsNull(xslParam))
{
throw new ServletException("xmlParam or xslParam is NULL");
}
pipedOutput = new PipedOutputStream();
pipedInput = new PipedInputStream(pipedOutput);
if (jsessionIdParam != null) {
xsltThread = new XsltThread(xslParam,
xmlParam + ";" + "jsessionid=" + jsessionIdParam, pipedOutput);
}
else
xsltThread = new XsltThread(xslParam,
xmlParam + "?" + DataAccessSingleton.SESSION_ID_PARAM + "=" +
sessionIdParam, pipedOutput);
xsltThread.start();
log4j.debug("rendering...");
renderFO(new InputSource(pipedInput), response);
log4j.debug("rendering done");
}
catch(Exception ex)
{
log4j.error("Exception in FopServlet ", ex);
ex.printStackTrace();
try
{
PrintWriter out = response.getWriter();
out.println("<html><head><title>Error</title></head>\n<body><h1>FopServlet Error</h1>
<p> "+ex.getMessage()+" </p></body></html>");
out.flush();
} catch (IOException e)
{
log4j.error("Cant write output, IOException in FopServlet ", e);
}
} finally
{
try
{
if (xsltThread!=null)
{
xsltThread.youAreDone();
xsltThread.join(1000);
}
if (pipedInput!=null)
{
pipedInput.close();
}
} catch (Exception ex)
{
log.error("Exception in FOP servlet ",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.setLogger(log);
driver.setRenderer(Driver.RENDER_PDF);
driver.run();
byte[] content = out.toByteArray();
response.setHeader("Expires", "-1");
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache");
response.setContentLength(content.length);
response.getOutputStream().write(content);
response.getOutputStream().flush();
}
catch(Exception ex)
{
log4j.error("Exception in renderFO ", ex);
ex.printStackTrace();
throw new ServletException(ex);
}
}
}
------------------------------------------
import javax.xml.transform.*;
import javax.xml.transform.stream.*;
import org.xml.sax.SAXException;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
public class XsltThread extends Thread
{
org.apache.log4j.Category log = org.apache.log4j.Category.getInstance("LADPRI");
private String xslLocationULR, xmlLocationURL;
private java.io.OutputStream outStream;
private boolean canStop = false;
public XsltThread(String xslLocationULR, String
xmlLocationURL,java.io.OutputStream outStream)
{
this.xslLocationULR = xslLocationULR;
this.xmlLocationURL = xmlLocationURL;
this.outStream = outStream;
this.canStop = false;
}
public void run()
{
log.debug("XsltThread started");
int time10nthSec = 50; // timeout 5 sec.
try
{
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer(new
StreamSource(this.xslLocationULR));
transformer.transform(new StreamSource(this.xmlLocationURL), new
StreamResult(this.outStream));
while (!this.canStop && time10nthSec>0)
{
time10nthSec--;
Thread.currentThread().sleep(100);
}
} catch (Exception ex)
{
log.error("Exception in XsltThread ",ex);
ex.printStackTrace();
} finally
{
try
{
outStream.flush();
outStream.close();
} catch (java.io.IOException ex)
{
}
}
log.debug("XsltThread stopped");
}
public void youAreDone()
{
this.canStop = true;
}
}
> -----Original Message-----
> From: Pani, Gourav [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, January 22, 2003 3:17 PM
> To: 'Struts Users Mailing List'
> Subject: RE: XML to PDF(need sample servlet code...)
>
>
> i posted sample code on this thread yesterday.
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, January 22, 2003 3:32 AM
> To: [EMAIL PROTECTED]
> Subject: RE: XML to PDF(need sample servlet code...)
>
>
> Hi,
> Do u have any sample code of a servlet that does the same?I
> tried to use the
>
> FOP servlet given with FOP distribution..But i keep on
> getting null pointer
> exceptions...
>
> Any help will be appreciated..
>
> regards,
> Shirish.
>
> -----Original Message-----
> From: madhavan [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, January 22, 2003 12:45 AM
> To: struts-user
> Cc: madhavan
> Subject: [OT}RE: XML to PDF
>
>
> Hi
>
> I used Apache FOP and XSLT to convert XML to pdf.
>
> Regards
> Madhavan
>
> -----Original Message-----
> From: V. Cekvenich [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, January 21, 2003 2:27 PM
> To: [EMAIL PROTECTED]
> Subject: Re: XML to PDF
>
>
> Yet another alternative:
> JasperReports and iText.
>
> Yan, Charlene wrote:
> > Hello all,
> >
> > I just got assigned to convert XML to pdf to do reports.
> Is any of you
> working on it? Any insights where I should get started my
> research? I am
> looking at xmlmil and aparche xml home right now.
> >
> > Thanks in advance for your help!
> >
> > Charlene
>
>
>
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