Re: urgent help needed using FOP
Thanks for your help. Chris. Have a nice weekend, Jerry --- Chris Bowditch <[EMAIL PROTECTED]> wrote: > Jerry wrote: > > > John, > > > > Thank you for your message. > > > > Yes, I realize the data in the byte array "bt" in > tiff > > does not belong to the standard formatting object. > > That is why I got the error "content is not > allowed in > > prolog". My understanding is I need to either > convert > > it into the formatting object using XSL or convert > it > > into XML. However, I am new to FOP and XML/XSL and > do > > not know how to do that. If possible, we need to > > convert the data format in memory,that means, > > everything is done in memory, not save it as a > file > > first and process using FOP. Would you please > give me > > your thought on it or you have a piece of codes > for me > > to share? I will greatly appreciate it. > > Firstly, your question really should have been > posted to the user-list. The > dev list is really for discussing internal work on > FOP. > > I believe your goal should be to create a servlet > that serves Tiff images up. > You can reference the Tiff images from an XSL-FO > document using a HTTP URL, > via the fo:external-graphic tag. FOP can then be > called on the XSL-FO document > to generate a PDF, and you can do this within > another servlet if you need to. > > May I also suggest that you get yourself a good book > on XSL-FO and learn the > basics before attempting to implement a solution > based on XSL-FO. > > > > Chris > > __ Do you Yahoo!? Yahoo! Small Business $15K Web Design Giveaway http://promotions.yahoo.com/design_giveaway/
Re: urgent help needed using FOP
John,
Thank you for your message.
Yes, I realize the data in the byte array "bt" in tiff
does not belong to the standard formatting object.
That is why I got the error "content is not allowed in
prolog". My understanding is I need to either convert
it into the formatting object using XSL or convert it
into XML. However, I am new to FOP and XML/XSL and do
not know how to do that. If possible, we need to
convert the data format in memory,that means,
everything is done in memory, not save it as a file
first and process using FOP. Would you please give me
your thought on it or you have a piece of codes for me
to share? I will greatly appreciate it.
Thanks in advance,
Jerry
--- John Austin <[EMAIL PROTECTED]> wrote:
> On Thu, 2004-04-01 at 14:30, Jerry wrote:
> > Hi,
> >
> > I am currently working on a
> > project which convert binary data in tiff format
> into
> > PDF format. I refer to the
> example(FopServlet.java)
> > and always got error "Error 500: Content is
> > not allowed in prolog. ". I could not figure out
> what
> > the problem is. I was stuch by this. Please help
> me.
> >
> > Here is the peice of codes. Would you please take
> a
> > look and give me a suggestion. I will greatly
> > appreciate it.
> >
> > BTW, the binary data format from database which
> will
> > be displayed on the web is in tiff format, not a
> > formatting object. If it can be displayed directly
> on
> > the web in pdf format, it is not necessary to
> convert
> > it into pdf first.
>
> It is not clear from your example whether your data
> is usable by
> FOP.
>
> FOP is designed to process XML files, specifically
> XSL-FO or
> Formatting objects.
>
> You state on your message and in comments that the
> binary data is
> in a TIFF format. You move this data around,
> eventualy passing it
> to the FOP Driver object. I don't think this is at
> all reasonable
> as a TIFF object is definitely not going to be
> accepted by the SAX
> parser used in FOP.
>
> You need to read the FOP examples again.
>
> > thanks,
> >
> > Jerry
> >
> >
>
***
> > import javax.servlet.*;
> > import javax.servlet.http.*;
> > import java.io.*;
> > import java.util.*;
> > import java.util.zip.*;
> > import java.sql.*;
> > import java.text.*;
> >
> >
> > import java.net.*;
> > import java.util.Properties;
> > import java.awt.image.*;
> > import com.sun.media.jai.codec.*;
> > import com.sun.media.jai.*;
> > import javax.media.jai.JAI;
> > import javax.media.jai.*;
> > import javax.media.jai.RenderedOp;
> > import javax.media.jai.PlanarImage;
> > import javax.media.jai.OpImage;
> > import javax.media.jai.util.*;
> > import
> > javax.media.jai.remote.SerializableRenderedImage;
> > import java.awt.image.renderable.ParameterBlock;
> > import java.lang.Object;
> > import java.awt.Image;
> > import javax.swing.ImageIcon;
> > import java.io.ByteArrayOutputStream.*;
> >
> >
> > import com.csi.utils.StringUtils;
> > import com.csi.daserver.global.*;
> > import com.csi.dcserver.objects.DCSession;
> > import com.csi.dcserver.exceptions.*;
> > import com.csi.daserver.utils.MsgPool;
> > import com.csi.dcserver.crypto.Crypto;
> >
> >
> > import org.xml.sax.InputSource;
> >
> > import org.apache.fop.apps.Driver;
> > 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;
> >
> >
> > public class ImageDownload extends HttpServlet {
> >
> > Logger log = null;
> >
> > public void doGet(HttpServletRequest req,
> > HttpServletResponse resp) throws ServletException,
> > IOException {
> >
> > ...
> >
> > //got the binary data in tiff format from
> database
> > and put the binary data in byte array bt
> > Byte[] bt = (byte[]) v.elementAt(0);
> >
> > sendPDFBinaryResponse(resp, req, bt,
> > "application/pdf");
> > return;
> > }
> > }
> >
> > //
> > private void
> > sendPDFBinaryResponse(HttpServletResponse
> > res,HttpServletRequest req, byte[]
> >
urgent help needed using FOP
Hi,
I am currently working on a
project which convert binary data in tiff format into
PDF format. I refer to the example(FopServlet.java)
and always got error "Error 500: Content is
not allowed in prolog. ". I could not figure out what
the problem is. I was stuch by this. Please help me.
Here is the peice of codes. Would you please take a
look and give me a suggestion. I will greatly
appreciate it.
BTW, the binary data format from database which will
be displayed on the web is in tiff format, not a
formatting object. If it can be displayed directly on
the web in pdf format, it is not necessary to convert
it into pdf first.
thanks,
Jerry
***
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import java.util.zip.*;
import java.sql.*;
import java.text.*;
import java.net.*;
import java.util.Properties;
import java.awt.image.*;
import com.sun.media.jai.codec.*;
import com.sun.media.jai.*;
import javax.media.jai.JAI;
import javax.media.jai.*;
import javax.media.jai.RenderedOp;
import javax.media.jai.PlanarImage;
import javax.media.jai.OpImage;
import javax.media.jai.util.*;
import
javax.media.jai.remote.SerializableRenderedImage;
import java.awt.image.renderable.ParameterBlock;
import java.lang.Object;
import java.awt.Image;
import javax.swing.ImageIcon;
import java.io.ByteArrayOutputStream.*;
import com.csi.utils.StringUtils;
import com.csi.daserver.global.*;
import com.csi.dcserver.objects.DCSession;
import com.csi.dcserver.exceptions.*;
import com.csi.daserver.utils.MsgPool;
import com.csi.dcserver.crypto.Crypto;
import org.xml.sax.InputSource;
import org.apache.fop.apps.Driver;
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;
public class ImageDownload extends HttpServlet {
Logger log = null;
public void doGet(HttpServletRequest req,
HttpServletResponse resp) throws ServletException,
IOException {
...
//got the binary data in tiff format from database
and put the binary data in byte array bt
Byte[] bt = (byte[]) v.elementAt(0);
sendPDFBinaryResponse(resp, req, bt,
"application/pdf");
return;
}
}
//
private void
sendPDFBinaryResponse(HttpServletResponse
res,HttpServletRequest req, byte[]
bt,StringsContTypeHeader) throws IOException,
ServletException{
if(sContTypeHeader=="application/pdf"){
if (log == null) {
log = new
ConsoleLogger(ConsoleLogger.LEVEL_WARN);
MessageHandler.setScreenLogger(log);
}
renderFO(new InputSource(new
ByteArrayInputStream(bt)), res);
}
}
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);
}
}
...
}
This is the exact error I got:
org.xml.sax.SAXParseException: Content is not allowed
in prolog.
at
org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1172)
at org.apache.fop.apps.Driver.render(Driver.java:498)
at org.apache.fop.apps.Driver.run(Driver.java:565)
__
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