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Posted to fop-users@xmlgraphics.apache.org by Jerry <je...@yahoo.com> on 2004/04/02 19:57:47 UTC
urgent help needed using FOP
Hi,
I have a problem with displaying tiff data in PDF
format using FOP. We have binary data in tiff stored
in database. What I need to do is to write a servlet
to get those binary data in tiff format from database
and put those data in a byte array. Next, in the same
servlet, I need to get those binary data in tiff
format from the byte array and display them on the web
in PDF format using FOP. I know if the binary data is
formatted object, it is easy to convert it into PDF
using FOP. However, the data in the byte array "bt" in
tiff does not belong to the standard formatting
object.
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. Anyone has the
experience and would like to share the knowledge and
experience with me, I will greatly appreciate. If you
have a piece of codes for me to share, that will be
greatly helpful.
I also attached my piece of codes for your reference.
I know my code is not working, because I tried to
convert non-standard formatting object to PDF. I need
to do something about this part. Please help me.
Thanks in advance,
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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Re: urgent help needed using FOP
Posted by Jeremias Maerki <de...@greenmail.ch>.
My suggestion: Create a separate Servlet that is only responsible to
return the byte stream for your TIFF image. Then modify your current
servlet to simply pass the correct URL as a parameter to the XSLT
process. That URL must be so that FOP can load the TIFF image directory
from your database via that newly create Servlet. That's the easy and
quick way. Below two other ways to solve this puzzle:
Simply passing in an (ByteArray)InputStream as XSLT parameter won't work.
It might (!) work if the the TIFF image were encoded as a RFC 2397 data
URL [1] and a corresponding URLHandler were present. But then you would
probably have to pass it as a String, not as an InputStream.
[1] http://www.ietf.org/rfc/rfc2397.txt
Yet another way is to create a custom URL handler [2]. In this approach
you create your own URL scheme, for example
"dbimages://testDB/20040326110116". This lets you avoid the Servlet if
you're concerned about not allowing outside access directly to your
images in the database. But it's probably a bit more work if you already
know how to create Servlets.
[2] http://java.sun.com/developer/onlineTraining/protocolhandlers/
I hope this helps and good luck.
On 06.04.2004 23:59:58 Jerry wrote:
> John and folks,
>
> First of all, thank you for your help.
>
> I am still struggling with my PDF conversion. I am a
> little headache with this. We have a lot of FOP/JAXP
> professional here and hopefully I can get your
> suggestion.
>
> From what you suggested me, I read a lot of reference
> and resources. Now I tryed to use JAXP and FOP to
> convert the binary tiff data into PDF format and I
> got an error "Error 500:java.io.ByteArrayInputStream".
> I know something wrong with my code. I just couldn't
> figure out how to fix it. Below is the partcial codes
> I wrote. Can you please take a look at my code and
> give me your recommandation? I know I already
> bothered you too much. You are not supposed to spend
> time on this for me. If you don't have time, I totally
> understand that. If you could help me, I will greatly
> appreciate it. I use * to mark the part which I have
> problem with. I also enclosed my XSL file here for
> your reference.
--
Jeremias Maerki <de...@greenmail.ch>
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Re: urgent help needed using FOP
Posted by Jerry <je...@yahoo.com>.
John and folks,
First of all, thank you for your help.
I am still struggling with my PDF conversion. I am a
little headache with this. We have a lot of FOP/JAXP
professional here and hopefully I can get your
suggestion.
>From what you suggested me, I read a lot of reference
and resources. Now I tryed to use JAXP and FOP to
convert the binary tiff data into PDF format and I
got an error "Error 500:java.io.ByteArrayInputStream".
I know something wrong with my code. I just couldn't
figure out how to fix it. Below is the partcial codes
I wrote. Can you please take a look at my code and
give me your recommandation? I know I already
bothered you too much. You are not supposed to spend
time on this for me. If you don't have time, I totally
understand that. If you could help me, I will greatly
appreciate it. I use * to mark the part which I have
problem with. I also enclosed my XSL file here for
your reference.
My servlet:
public class ImageDownload extends HttpServlet {
...
public void doPost(HttpServletRequest req,
HttpServletResponse resp) throws
ServletException, IOException {
...
//get binary tiff data from database and put it in
an byte array
byte[] bt=(byte[]) v.elementAt(0);
DisplayToPdf(bt, resp);
}
public void DisplayToPdf(byte[] bt,
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);
ByteArrayInputStream bais=new
ByteArrayInputStream(bt);
File xslfile = new
File("C:/workspace/MaxTradDownload/Web
Content/html/Tiff2Pdf.xsl");
try {
driver.setOutputStream(out);
//Setup XSLT
TransformerFactory factory =
TransformerFactory.newInstance();
Transformer transformer =
factory.newTransformer(new StreamSource(xslfile));
//*assign ByteArrayInputStream bais to image
variable in xsltfile, seems like it is not working.
transformer.setParameter("image", bais);
//Setup input for XSLT transformation
//*Here, I need to do something to convert
ByteArrayInputStream into Source type. I haven't
figure out how to do or if it is possible
//Source src =
team.getSourceForProjectTeam();
//Resulting SAX events (the generated FO)
must be piped through to FOP
Result res = new
SAXResult(driver.getContentHandler());
//Start XSLT transformation and FOP
processing
//* I need to work on the first parameter
transformer.transform((Source)bais, res);
byte[] content = out.toByteArray();
response.setContentLength(content.length);
response.getOutputStream().write(content);
response.getOutputStream().flush();
} finally {
out.close();
}
} catch (Exception ex) {
throw new ServletException(ex);
}
}
}
*********************
My XSL(Tiff2pdf.xsl) file for your reference:
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.1"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:fo="http://www.w3.org/1999/XSL/Format"
exclude-result-prefixes="fo">
<fo:root font-family="Times Roman" font-size="12pt"
text-align="center"
xmlns:fo="http://www.w3.org/1999/XSL/Format">
<fo:layout-master-set>
<fo:simple-page-master
margin-right="1.5cm"
margin-left="1.5cm"
margin-bottom="2cm"
margin-top="1cm"
page-width="21cm"
page-height="29.7cm"
master-name="left">
<fo:region-before extent="1cm"/>
<fo:region-body margin-top="1cm"/>
<fo:region-after extent="1.5cm"/>
</fo:simple-page-master>
</fo:layout-master-set>
<fo:page-sequence id="N2528" master-reference="left">
<fo:static-content flow-name="xsl-region-after">
<fo:block text-align-last="center" font-size="10pt">
<fo:page-number/>
</fo:block>
</fo:static-content>
<fo:flow flow-name="xsl-region-body">
<fo:block font-size="18pt" font-weight="bold">Copy
Only</fo:block>
<fo:block>
<fo:block font-size="16pt" font-weight="bold"
space-before.minimum="1em"
space-before.optimum="1.5em"
space-before.maximum="2em">Align in Smaller
Viewport</fo:block>
<fo:block>
<!-- <fo:external-graphic width="50pt" height="50pt"
overflow="hidden"
src="C:/TifDownloadData/20040326110116.tiff"/>-->
<fo:external-graphic width="50pt" height="50pt"
overflow="hidden" src="{@image}"/>
</fo:block>
<fo:block font-size="16pt" font-weight="bold"
space-before.minimum="1em"
space-before.optimum="1.5em"
space-before.maximum="2em"/>
This document is just Copy only, Non Negotiable
</fo:block>
</fo:flow>
</fo:page-sequence>
</fo:root>
</xsl:stylesheet>
--- John Austin <jw...@sympatico.ca> wrote:
> You asked this question on the devl list and Chris
> gave you an excellent
> answer.
>
> He also suggested that you read up a bit on XSL-FO
> as there are standard
> techniques that can be used to embed TIFF images in
> XSL-FO documents.
>
> Several people spent a bit of time reading your
> servlet. Please re-read
> Chris' answer to you and look for an example XSL-FO
> document that embeds
> a TIFF graphic. You should be able to find XSL-FO
> resources on the web.
> Look for the web version of Dave Pawson's book. Look
> for the Mulberry
> resources and the OASIS web site. Search the
> FOP-USER archives as well
> as the Mulberry XSL list archive.
>
> I don't think you need a servlet yet. The first
> thing you need is
> an XSL-FO example of a document that embeds a TIFF
> document.
> You may need to understand XSL-FO better to do this.
>
> You can render this in PDF, PCL, etc using FOP from
> the command line.
>
> Your next step would be to generate the TIFF file
> from the database
> as Chris suggested. This could be done with a CGI or
> Servlet.
>
> You'll get a lot of help here as long as people can
> see that you've
> made some effort on your own.
>
> On Fri, 2004-04-02 at 14:27, Jerry wrote:
> > Hi,
> >
> > I have a problem with displaying tiff data in PDF
> > format using FOP. We have binary data in tiff
> stored
> > in database. What I need to do is to write a
> servlet
> > to get those binary data in tiff format from
> database
> > and put those data in a byte array. Next, in the
> same
> > servlet, I need to get those binary data in tiff
> > format from the byte array and display them on the
> web
> > in PDF format using FOP. I know if the binary data
> is
> > formatted object, it is easy to convert it into
> PDF
> > using FOP. However, the data in the byte array
> "bt" in
> > tiff does not belong to the standard formatting
> > object.
> > 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. Anyone has the
> > experience and would like to share the knowledge
> and
> > experience with me, I will greatly appreciate. If
> you
> > have a piece of codes for me to share, that will
> be
> > greatly helpful.
> >
> > I also attached my piece of codes for your
> reference.
> > I know my code is not working, because I tried to
> > convert non-standard formatting object to PDF. I
> need
> > to do something about this part. Please help me.
> >
> > Thanks in advance,
> >
> >
> > 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();
> >
>
=== message truncated ===
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Re: urgent help needed using FOP
Posted by John Austin <jw...@sympatico.ca>.
You asked this question on the devl list and Chris gave you an excellent
answer.
He also suggested that you read up a bit on XSL-FO as there are standard
techniques that can be used to embed TIFF images in XSL-FO documents.
Several people spent a bit of time reading your servlet. Please re-read
Chris' answer to you and look for an example XSL-FO document that embeds
a TIFF graphic. You should be able to find XSL-FO resources on the web.
Look for the web version of Dave Pawson's book. Look for the Mulberry
resources and the OASIS web site. Search the FOP-USER archives as well
as the Mulberry XSL list archive.
I don't think you need a servlet yet. The first thing you need is
an XSL-FO example of a document that embeds a TIFF document.
You may need to understand XSL-FO better to do this.
You can render this in PDF, PCL, etc using FOP from the command line.
Your next step would be to generate the TIFF file from the database
as Chris suggested. This could be done with a CGI or Servlet.
You'll get a lot of help here as long as people can see that you've
made some effort on your own.
On Fri, 2004-04-02 at 14:27, Jerry wrote:
> Hi,
>
> I have a problem with displaying tiff data in PDF
> format using FOP. We have binary data in tiff stored
> in database. What I need to do is to write a servlet
> to get those binary data in tiff format from database
> and put those data in a byte array. Next, in the same
> servlet, I need to get those binary data in tiff
> format from the byte array and display them on the web
> in PDF format using FOP. I know if the binary data is
> formatted object, it is easy to convert it into PDF
> using FOP. However, the data in the byte array "bt" in
> tiff does not belong to the standard formatting
> object.
> 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. Anyone has the
> experience and would like to share the knowledge and
> experience with me, I will greatly appreciate. If you
> have a piece of codes for me to share, that will be
> greatly helpful.
>
> I also attached my piece of codes for your reference.
> I know my code is not working, because I tried to
> convert non-standard formatting object to PDF. I need
> to do something about this part. Please help me.
>
> Thanks in advance,
>
>
> 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)
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! Small Business $15K Web Design Giveaway
> http://promotions.yahoo.com/design_giveaway/
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: fop-user-unsubscribe@xml.apache.org
> For additional commands, e-mail: fop-user-help@xml.apache.org
--
John Austin <jw...@sympatico.ca>
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