On 7/16/2015 2:01 PM, Chen Yang wrote:
Hi all,
I'm maintaining a Java servlet which uses for render PDF files. Recently I've
been tasked to deploy it to run on windows environment.
It works perfectly in our old Linux environment; but I'm having issues in
windows with the same setup, I can however get a pdf report when there is no
image included, but no luck when there are images included.
I just want to mention I have checked firewall, file permissions and networking
on the windows sandbox machine.
I've been asking around for helps, but without any luck so far. If anyone in
the mailing list can shed some light on it, It would be much appreciated!
I didn't read all your code, but in moving from *nix to Windows, the
first thing I think of is networking. Are your image files on the local
machine, or elsewhere on the network? By default, the localsystem user
that services run under won't have access to networked files. The other
thing to check is if any of your paths have spaces in them, and if so,
that they're escaped properly.
Cheers,
Chen
Environment setup:
* JRE 1.8.0_45
* Tomcat 8.0.23
* Windows Server 2008 R2
Error Message from Tomcat:
HTTP Status 500 - javax.xml.transform.TransformerException: org.xml.sax.SAXException:
The resource path
[http://testing.mycompany.com/app/client_data/logo.png]<http://testing.mycompany.com/app/client_data/logo.png%5d>
is not valid
type Exception report
message javax.xml.transform.TransformerException: org.xml.sax.SAXException: The
resource path
[http://testing.mycompany.com/app/client_data/logo.png]<http://testing.mycompany.com/app/client_data/logo.png%5d>
is not valid
description The server encountered an internal error that prevented it from
fulfilling this request.
Servlet Code
package org.apache.fop.servlet;
import java.net.*;
import java.io.*;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.URI;
import java.net.URL;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.URIResolver;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.stream.StreamSource;
import org.apache.commons.io.output.ByteArrayOutputStream;
import org.apache.xmlgraphics.io.Resource;
import org.apache.xmlgraphics.io.ResourceResolver;
import org.apache.fop.apps.FOPException;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.FopFactory;
import org.apache.fop.apps.FopFactoryBuilder;
import org.apache.fop.apps.FopConfParser;
import org.apache.fop.apps.MimeConstants;
import java.util.Calendar;
import java.text.SimpleDateFormat;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.DefaultConfigurationBuilder;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.configuration.DefaultConfiguration;
import org.xml.sax.SAXException;
public class FopServlet extends HttpServlet {
/** Name of the parameter used for the XSL-FO file */
protected static final String FO_REQUEST_PARAM = "fo";
/** Name of the parameter used for the XML file */
protected static final String XML_REQUEST_PARAM = "xml";
/** Name of the parameter used for the XSLT file */
protected static final String XSLT_REQUEST_PARAM = "xslt";
/** Name of the parameter used for the ROOT URL */
protected static final String ROOT_REQUEST_PARAM = "root_url";
/** The TransformerFactory used to create Transformer instances */
protected TransformerFactory transFactory = null;
/** The FopFactory used to create Fop instances */
protected FopFactory fopFactory = null;
/** URIResolver for use by this servlet */
protected URIResolver uriResolver;
public void init() throws ServletException {
this.uriResolver = new ServletContextURIResolver(getServletContext());
this.transFactory = TransformerFactory.newInstance();
this.transFactory.setURIResolver(this.uriResolver);
//Configure FopFactory as desired
ResourceResolver resolver = new ResourceResolver() {
public OutputStream getOutputStream(URI uri) throws IOException {
URL url = getServletContext().getResource(uri.toASCIIString());
return url.openConnection().getOutputStream();
}
public Resource getResource(URI uri) throws IOException {
return new
Resource(getServletContext().getResourceAsStream(uri.toASCIIString()));
}
};
FopFactoryBuilder builder = new FopFactoryBuilder(new
File(".").toURI(), resolver);
//configureFopFactory(builder);
try {
String confFile = "C:\Program
Files\tomcat\webapps\pdf_servlet\WEB-INF\iss-fop.xconf";
builder = new FopConfParser(new
File(confFile)).getFopFactoryBuilder();
}catch(SAXException e) {
System.out.println(e);
}catch(IOException e) {
System.out.println(e);
}
fopFactory = builder.build();
}
public void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException {
try {
//Get parameters
String foParam = request.getParameter(FO_REQUEST_PARAM);
String xmlParam = request.getParameter(XML_REQUEST_PARAM);
String xsltParam = request.getParameter(XSLT_REQUEST_PARAM);
String RootParam = request.getParameter(ROOT_REQUEST_PARAM);
//Analyze parameters and decide with method to use
if (foParam != null) {
renderFO(foParam, response);
} else if ((xmlParam != null) && (xsltParam != null)) {
renderXML(xmlParam,xsltParam,RootParam,response);
} else {
response.setContentType("text/html");
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 (Exception ex) {
throw new ServletException(ex);
}
}
public static String now(String dateFormat) {
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
return sdf.format(cal.getTime());
}
/**
* Converts a String parameter to a JAXP Source object.
* @param param a String parameter
* @return Source the generated Source object
*/
protected Source convertString2Source(String param) {
Source src;
try {
src = uriResolver.resolve(param, null);
} catch (TransformerException e) {
src = null;
}
if (src == null) {
src = new StreamSource(new File(param));
}
return src;
}
private void sendPDF(byte[] content, HttpServletResponse response) throws
IOException {
//Send the result back to the client
response.setContentType("application/pdf");
File pdfFileName = new File(now("MM/dd/yyyy"));
response.addHeader("content-disposition","inline;filename=" + pdfFileName +
".pdf");
response.setContentLength(content.length);
//response.setContentLength(out.size());
response.getOutputStream().write(content);
response.getOutputStream().flush();
}
protected void renderFO(String fo, HttpServletResponse response)
throws FOPException, TransformerException, IOException {
//Setup source
Source foSrc = convertString2Source(fo);
//Setup the identity transformation
Transformer transformer = this.transFactory.newTransformer();
transformer.setURIResolver(this.uriResolver);
//Start transformation and rendering process
render(foSrc, transformer, response);
}
protected void renderXML(String xml, String xslt,String
rootUrl,HttpServletResponse response)
throws FOPException, TransformerException, IOException {
//Setup sources
StreamSource xmlSrc = new StreamSource(new URL(rootUrl +
"/output/xml/" + xml).openStream());
StreamSource xsltSrc = new StreamSource(new URL(rootUrl +
"/output/xslt/" + xslt).openStream());
//Setup the XSL transformation
Transformer transformer = this.transFactory.newTransformer(xsltSrc);
transformer.setURIResolver(this.uriResolver);
//Start transformation and rendering process
render(xmlSrc, transformer, response);
}
protected void render(Source src, Transformer transformer,
HttpServletResponse response)
throws FOPException, TransformerException, IOException {
FOUserAgent foUserAgent = getFOUserAgent();
//Setup output
ByteArrayOutputStream out = new ByteArrayOutputStream();
//Setup FOP
Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, out);
//Make sure the XSL transformation's result is piped through to FOP
Result res = new SAXResult(fop.getDefaultHandler());
//Start the transformation and rendering process
transformer.transform(src, res);
//Return the result
sendPDF(out.toByteArray(), response);
}
/** @return a new FOUserAgent for FOP */
protected FOUserAgent getFOUserAgent() {
FOUserAgent userAgent = fopFactory.newFOUserAgent();
//Configure foUserAgent as desired
return userAgent;
}
}
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