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RE: Problem parsing XML file with Xerces-J

• To: "'Midsummer Sun'" <midsummer.sun@g...>,<xml-dev@l...>
• Subject: RE: Problem parsing XML file with Xerces-J
• From: "Michael Kay" <mike@s...>
• Date: Thu, 31 Mar 2005 11:43:06 +0100
• In-reply-to: <bb5e8b8605033102246096e3ed@m...>
• Thread-index: AcU13CIIDFrFZ5dHSg+pmvKS0WyscgAAjjxA

What does your EntityResolver actually do?

Michael Kay
http://www.saxonica.com/ 

> -----Original Message-----
> From: Midsummer Sun [mailto:midsummer.sun@g...] 
> Sent: 31 March 2005 11:25
> To: xml-dev@l...
> Subject: Re:  Problem parsing XML file with Xerces-J
> 
> Thanks a lot for your advice. I would like to implement the
> EntityResolver solution.. It seems cleaner object oriented wise ;) Is
> it? or is editing the file using java.io classes(i.e. removing the DTD
> reference) before parsing would be appropriate? Please give your
> advice..
> 
> To my understanding I made the following changes to my program (for
> EntityResolver solution).
> 
> public class XYZ extends DefaultHandler  {
> 
>    public static void main(String[] args)
>    {
>        XYZ obj = new XYZ();
>        
>        try {
>        //XML parser declarations
>        DocumentBuilderFactoryImpl factory = new 
> DocumentBuilderFactoryImpl();
>        DocumentBuilder builder = factory.newDocumentBuilder();
>        builder.setEntityResolver(obj);
> 
>        Document document = builder.parse(new InputSource(new
> StringReader(rsp)));
> 
>        ...... other code
> 
> The program compiles fine. But I am still getting the same error
> (connection timed out)
> 
> Hoping for your further help.
> 
> Best regards,
> 
> 
> On Thu, 31 Mar 2005 10:42:38 +0100, Michael Kay 
> <mike@s...> wrote:
> > The XML parser is trying to access the document at 
> http://host/x.dtd (using
> > the java.net library) and gets a timeout because it isn't 
> accessible.
> > 
> > The fact that you didn't request validation is irrelevant. 
> It's a common,
> > and erroneous, belief that if you don't request validation 
> then the parser
> > won't try to read the external DTD. It needs it to expand 
> entity references.
> > 
> > Try either editing the DTD reference out of the file before 
> parsing it, or
> > using an EntityResolver to satisfy the reference from 
> somewhere else.
> > 
> > Michael Kay
> > http://www.saxonica.com/
> > 
> > 
> > > -----Original Message-----
> > > From: Midsummer Sun [mailto:midsummer.sun@g...]
> > > Sent: 31 March 2005 10:33
> > > To: xml-dev@l...
> > > Subject:  Problem parsing XML file with Xerces-J
> > >
> > > Hi Friends,
> > >    I am parsing a XML file using Xerces-J 2.6.2 using the 
> DOM API. I
> > > am facing some problem. The XML document is available in 
> my program in
> > > Java string form.
> > >
> > > Here is relevant portion of code (with line numbers for
> > > readibility) ..
> > >
> > > 1) DocumentBuilderFactoryImpl factory = new
> > > DocumentBuilderFactoryImpl();
> > > 2) DocumentBuilder builder = factory.newDocumentBuilder();
> > > 3) String rsp = "xmlstring";
> > > 4) Document document = builder.parse(new InputSource(new
> > > StringReader(rsp)));
> > >
> > > A sample xmlstring is (for line 3) -
> > > <?xml version='1.0' encoding='ISO-8859-1'?><!DOCTYPE 
> MESSAGING SYSTEM
> > > 'http://host/x.dtd'><MESSAGING></MESSAGING>
> > >
> > > (I am not using the validating mode. This XML is sent to 
> my program by
> > > a remote process and DTD reference is redundant to me).
> > >
> > > Line 4 is giving error (I am pasting full stack trace for
> > > your reference) -
> > > java.net.ConnectException: Connection timed out: connect
> > >         at java.net.PlainSocketImpl.socketConnect(Native Method)
> > >         at java.net.PlainSocketImpl.doConnect(Unknown Source)
> > >         at 
> java.net.PlainSocketImpl.connectToAddress(Unknown Source)
> > >         at java.net.PlainSocketImpl.connect(Unknown Source)
> > >         at java.net.Socket.connect(Unknown Source)
> > >         at java.net.Socket.connect(Unknown Source)
> > >         at sun.net.NetworkClient.doConnect(Unknown Source)
> > >         at sun.net.www.http.HttpClient.openServer(Unknown Source)
> > >         at sun.net.www.http.HttpClient.openServer(Unknown Source)
> > >         at sun.net.www.http.HttpClient.<init>(Unknown Source)
> > >         at sun.net.www.http.HttpClient.<init>(Unknown Source)
> > >         at sun.net.www.http.HttpClient.New(Unknown Source)
> > >         at sun.net.www.http.HttpClient.New(Unknown Source)
> > >         at sun.net.www.http.HttpClient.New(Unknown Source)
> > >         at
> > > 
> sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Sour
> > > ce)
> > >         at
> > > 
> sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
> > >         at
> > > 
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown So
> > > urce)
> > >         at
> > > 
> org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(Unknown So
> > > urce)
> > >         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 Sourc
> > > e)
> > >         at
> > > 
> org.apache.xerces.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch(
> > > Unknown Source)
> > >         at
> > > 
> org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Un
> > > known 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.DOMParser.parse(Unknown Source)
> > >         at
> > > org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
> > >         at XYZ.main(XYZ.java:47)
> > >
> > > I don't know what this call has to do with java.net package !
> > >
> > > I'll appreciate help in understanding what is going wrong,
> > > and how to solve it..
> > >
> > > Best regards,
> > >
> > > -----------------------------------------------------------------
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> > > initiative of OASIS <http://www.oasis-open.org>
> > >
> > > The list archives are at http://lists.xml.org/archives/xml-dev/
> > >
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> > >
> > >
> > 
> >
> 
> -----------------------------------------------------------------
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• References:
  • Re: Problem parsing XML file with Xerces-J
    • From: Midsummer Sun <midsummer.sun@g...>

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