Jeremias and folks,
I rewrote my servlet and got a little progress even if
it still cannot display the tiff data.
When I ran my servlet, from web browser, I can see the
text(i.e. COPY ONLY etc) in PDF format. Those text are
from my XSL file. But it does not show the image. I
ran my new servlet--GetByteStream seperately, it can
display tiff image. It seems like the byte stream
which takes the binary data did not pass to XSL.
I enclosed the codes here. Can you please tell me
anything wrong with my codes?
Many thanks,
Jerry
//servlet to display tiff data in PDF format
public class DisplayImage extends HttpServlet {
...
private void
sendPDFBinaryResponse(HttpServletResponse
res,HttpServletRequest req) throws IOException,
ServletException{
if (log == null) {
log = new
ConsoleLogger(ConsoleLogger.LEVEL_WARN);
MessageHandler.setScreenLogger(log);
}
try {
ByteArrayOutputStream out = new
ByteArrayOutputStream();
Driver driver = new Driver();
driver.setLogger(log);
driver.setRenderer(Driver.RENDER_PDF);
File xsltfile = new
File("C:/workspace/MaxTradDownload/Web
Content/html/Tiff2Pdf.xsl");
try {
res.setContentType("application/pdf");
driver.setOutputStream(out);
//Setup XSLT
TransformerFactory factory =
TransformerFactory.newInstance();
Transformer transformer =
factory.newTransformer(new StreamSource(xsltfile));
String GetByteStreamServletURL="http://"; +
req.getServerName() + ":" + req.getServerPort() +
"/MaxTradDownload" + "/GetByteStreamServlet?" +
req.getQueryString();
//*assign ByteArrayInputStream bais to image
variable in xsltfile, seems like it is not working.
transformer.setParameter("image",
GetByteStreamServletURL);
//Resulting SAX events (the generated FO)
must be piped through to FOP
Result result = new
SAXResult(driver.getContentHandler());
//Start XSLT transformation and FOP
processing
transformer.transform(new
StreamSource("c:/temp/DummyXML.xml"), result);
byte[] content = out.toByteArray();
res.setContentLength(content.length);
res.getOutputStream().write(content);
res.getOutputStream().flush();
} finally {
out.close();
}
} catch (Exception ex) {
throw new ServletException(ex);
}
}
...
}
//new servlet to return byte stream to DisplayImage
servlet
public class DisplayImage extends HttpServlet {
...
private void sendBinaryResponse(HttpServletResponse
res,
HttpServletRequest
req, byte[] bt,
String
sContTypeHeader,
String
sEncodingHeader, String encoding) {
res.addHeader("Expires", "Wed, 26 Feb 1970
08:21:57 GMT");
res.addHeader("Cache-Control", "no-cache");
res.setContentType(sContTypeHeader);
try {
OutputStream out = null;
res.setContentType(sContTypeHeader);
if (sEncodingHeader != null) {
res.setHeader("Content-Encoding",
sEncodingHeader);
}
res.setContentLength(bt.length);
out = res.getOutputStream();
out.write(bt);
out.flush();
out.close();
}
catch (Throwable e) {}
}
...
}
//here is my XSL file
<?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">
<xsl:template match="/">
<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>
<fo:external-graphic width="50pt" height="50pt"
overflow="hidden" src="url('[EMAIL PROTECTED]')"/>
</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:template>
</xsl:stylesheet>
--- Jerry <[EMAIL PROTECTED]> wrote:
> Jeremias,
>
> Thank you so much for your detailed information. It
> really helps me a lot.
>
> Based on your suggestion, I am going to implement
> it.
> I will let you know what I get.
>
> Best regards,
>
>
>
> Jerry
> --- Jeremias Maerki <[EMAIL PROTECTED]>
> wrote:
> > Hello Jerry,
> >
> > On 07.04.2004 19:07:05 Jerry wrote:
> > > Jeremias,
> > >
> > > Thank you for your suggestions.
> > >
> > > The soultion you gave me here is very intrigue
> to
> > me.
> > > However, I cannot fully understand your point.
> > Would
> > > you please clarify for me if the following
> > approach is
> > > not what you mean?
> > >
> > > 1. I need to write a new servlet which will
> return
> > a
> > > ByteArrayInputStream which take the binary tiff
> > data
> > > from database.
> >
> > Just nitpicking: Your new servlet writes the TIFF
> > file byte by byte to
> > the Request's OutputStream.
> >
> > > 2. Modify my current servlet and set the URL to
> my
> > new
> > > servlet as a parameter to the XSL file using the
> > > following:
> > >
> > > //assume the new servlet is GetByteStreamServlet
> > > String
> > NewServletURL="/GetByteStreamServlet?id=123"
> >
> > Right! Something like that, if the base URL is
> set.
> > YOu might have to
> > use http://localhost/....
> >
> > > TransformerFactory factory =
> > > TransformerFactory.newInstance();
> > > Transformer transformer =
> > > factory.newTransformer(new
> > StreamSource(xsltfile));
> > >
> > >
> > > //pass NewServletURL to image variable
> in
> > > xsltfile, is this corect?
> > > transformer.setParameter("image",
> > > NewServlet);
> >
> > Correct.
> >
> > >
> > > If above correct, I also modify XSL file like
> > this:
> > > ...
> > > <fo:external-graphic width="50pt" height="50pt"
> > > overflow="hidden" src="URL('[EMAIL PROTECTED]')"/>
> > > ...
> >
> > Correct.
> >
> > > If I use this way, how can set Source parameter
> of
> > > transformer.transform((Source)?, res)? I am not
> > sure
> > > of this part.
> >
> > The source document is probably a dummy XML
> > document, just like this:
> >
> > <dummy/>
> >
> > That's enough.
> >
> > > Please correct me if I misunderstood your point.
> >
> > No, you did alright. The XSLT you posted on the
> list
> > earlier will
> > probably not work however. It doesn't look right.
> At
> > least an embracing
> > xsl:template is missing:
> >
> > <xsl:template match="/">
> > <!-- your xsl-fo code here -->
> > </xsl:template>
> >
> >
> > Create the TIFF-serving Servlet first and then get
> > your XSLT stylesheet
> > together from the command-line. You can test the
> > TIFF-Servlet from your
> > browser. If both are working go back to your
> > original servlet and finish.
> >
> > For the next time, please don't write directly to
> > those who answer
> > questions. Others won't be able to profit from the
> > solutions I'm giving
> > you, as I can't tell whether you'd agree if I
> simply
> > sent my answer to
> > the list again.
> > --
> > Jeremias Maerki <[EMAIL PROTECTED]>
> >
>
>
> __________________________________
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