Hi,
I'm not entirely certain this is a xerces problem, but since the top part of
my stack trace is xerces classes I thought I'd try here first. Let me know
if it's more likely one of the other components that's the problem, and I'll
go hassle them :-)
I have a servlet which runs an XSL transformation (stylesheet read from a
file) on an XML document held in a string. The document's doctype includes
public & system IDs, but the URL in the system ID doesn't exist (yet) so I'm
using the Apache XML Commons catalog entity resolver to substitute a local
copy of the DTD. At least, that's the theory.
I know the catalog manager is finding its configuration file okay (the log
shows messages resolving the URIs it contains to absolute paths) and the
resolved path is the location of my DTD. However, when the transform runs,
I get an exception that seems to be because it's trying to access the
original (http) systemId instead of using the local copy. I don't see any
messages from the resolver in the log to suggest that it's even been called
upon to resolve the DTD location.
The code I'm using is
URL xslUrl = MyServlet.class.getResource(XSL_STYLESHEET);
InputStream xslIn = MyServlet.class.getResourceAsStream(XSL_STYLESHEET);
DOMResult domOut = new DOMResult();
TransformerFactory factory = TransformerFactory.newInstance();
factory.setURIResolver(new CatalogResolver());
Transformer stylesheet = factory.newTransformer(new StreamSource(xslIn,
xslUrl.toExternalForm()));
stylesheet.transform(new StreamSource(new StringReader(xml)), domOut);
the document is
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE data PUBLIC "-//FOOBAR/DTD My Data 1.0//EN"
"http://internal.host/dtd/data-1.0.dtd";>
<data>
<point x="0" y="0" size="5"/>
<point x="10" y="20" size="10"/>
<point x="20" y="40" size="2"/>
</data>
and the log file contains
Parse catalog: file:/C:/app/build/web/WEB-INF/catalog.xml
Loading catalog: file:/C:/app/build/web/WEB-INF/catalog.xml
Default BASE: file:/C:/app/build/web/WEB-INF/catalog.xml
public: -//FOOBAR/DTD My Data 1.0//EN
../dtd/data-1.0.dtd
PUBLIC: -//FOOBAR/DTD My Data 1.0//EN
file:/C:/app/build/web/dtd/data-1.0.dtd
system: http://internal.host/dtd/data-1.0.dtd
../dtd/data-1.0.dtd
SYSTEM: http://internal.host/dtd/data-1.0.dtd
file:/C:/app/build/web/dtd/data-1.0.dtd
[ERROR] TransformerException:java.io.FileNotFoundException:
http://internal.host/dtd/data-1.0.dtd
javax.xml.transform.TransformerException: java.io.FileNotFoundException:
http://internal.host/dtd/data-1.0.dtd
at
org.apache.xalan.transformer.TransformerImpl.fatalError(TransformerImpl.java:741)
at
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:715)
at
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1129)
at
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1107)
at com.foobar.MyServlet.processRequest(MyServlet.java:86)
at com.foobar.MyServlet.doPost(MyServlet.java:203)
...
Caused by: java.io.FileNotFoundException:
http://internal.host/dtd/data-1.0.dtd
at
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:798)
at org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(Unknown
Source)
at org.apache.xerces.impl.XMLEntityManager.startEntity(Unknown Source)
at org.apache.xerces.impl.XMLEntityManager.startDTDEntity(Unknown
Source)
at org.apache.xerces.impl.XMLDTDScannerImpl.setInputSource(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at
org.apache.xml.dtm.ref.DTMManagerDefault.getDTM(DTMManagerDefault.java:495)
at
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:658)
... 20 more
java.io.FileNotFoundException: http://internal.host/dtd/data-1.0.dtd
at
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:798)
at org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(Unknown
Source)
at org.apache.xerces.impl.XMLEntityManager.startEntity(Unknown Source)
at org.apache.xerces.impl.XMLEntityManager.startDTDEntity(Unknown
Source)
at org.apache.xerces.impl.XMLDTDScannerImpl.setInputSource(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at
org.apache.xml.dtm.ref.DTMManagerDefault.getDTM(DTMManagerDefault.java:495)
at
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:658)
at
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1129)
at
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1107)
at com.foobar.MyServlet.processRequest(MyServlet.java:86)
at com.foobar.MyServlet.doPost(MyServlet.java:203)
If I use some string manipulation to remove the doctype's public & system
IDs before passing the string on to the transform (i.e. leaving just
<!DOCTYPE data>) then it works fine.
Any suggestions? Is there something wrong with my code, or is it a
xerces/xalan/entityresolver bug?
Thanks for any help,
Andrew.
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