Ignore DTD declaration in incoming XML message

Former Member · ‎12-19-2008

Hi,

I have an issue where I am receiving an incoming XML message which starts with a DTD declaration.

This causes an issue with the XML parser step in the mapping because the parser attempts to resolve the DTD location. However this location is external and the PI server cannot access it.

The location for reference is http://dtd.bibit.com/paymentService_v1.dtd

Therefore I am investigating options to ignore the DTD declaration or removing it altogether prior to the XML parser step.

I would hope I could use either XSLT or Java mapping but do not really know where to start.

Can anyone please provide a method of doing this ? I would prefer to use XSLT but am open to other options.

I have no control over the DTD declaration as it is supplied by a 3rd party application.

Thanks

Colin.

Former Member · ‎12-19-2008

You can try this also...


<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet version="1.0"
     xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

     <xsl:template match="@*|node()">
         <xsl:copy>
            <xsl:apply-templates select="@*|node()"/>
         </xsl:copy>
     </xsl:template>    
</xsl:stylesheet>

Thanks,

-Russ

Former Member · ‎12-19-2008

Hi Colin,

Try executing this java map as the first step in your interface map. It should remove the DTD entity for

you. The second step would be your real map (XSLT, Graphicalu2026).


package com.test.example;

import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Map;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import com.sap.aii.mapping.api.MappingTrace;
import com.sap.aii.mapping.api.StreamTransformation;
import com.sap.aii.mapping.api.StreamTransformationConstants;
import com.sap.aii.mapping.api.StreamTransformationException;

public final class RemoveEntity implements StreamTransformation {

	private Map _param;     

	public void setParameter(Map param) {
		_param = param;
	}

	public void execute(InputStream in, OutputStream out) throws StreamTransformationException {

		try {			
			DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
			factory.setExpandEntityReferences(false);
			factory.setValidating(false);
			factory.setNamespaceAware(false);

			DocumentBuilder builder = factory.newDocumentBuilder();
			Document xmlIn = builder.parse(in);
			
			String xmlResponse = xmlIn.toString();

			out.write(xmlResponse.getBytes());
			out.flush();			
			
		} catch (Exception e) {              
			StringWriter sw = new StringWriter();
			PrintWriter pw = new PrintWriter(sw);
			e.printStackTrace(pw);
			throw new StreamTransformationException(sw.toString());  
		}
	}    
}

Thanks,

-Russ

Edited by: Russell Darr on Dec 19, 2008 8:27 PM

Former Member · ‎12-19-2008

Hi,

Can you provide your xml payload which has this dtd declaration.

You can do the java mapping. It will work for sure.

Thanks

Amit

Ignore DTD declaration in incoming XML message

Accepted Solutions (0)

Answers (3)

Answers (3)

Re: CORS status error REST API Sap Build Apps

Re: The uploaded file is inval. Verify that the fi...

How to show custom Data in a Fiori App (RAP)

Re: Problem when uploading SAP HANA Readiness Chec...

SAP Build Workzone maximum characters in text widg...