Svar: Re: [xml] Problem adding DTD at runtime

["Erik F. Andersen" <ea ascott dk>]

Thanks,

all this mixing Delphi and C sometimes confuses me. A call to xmlStrDup solved my problem.

Regarding the wsu:Id attribute in the DTD then my problem is that I have to speak to a WebService that I have 
no control over. This is already giving me headaches because XMLSec also have problems with it.

Regards,
Erik

> > > Daniel Veillard<veillard redhat com> 19-10-2004 11:41:30 >>>
On Tue, Oct 19, 2004 at 11:29:30AM +0200, Erik F. Andersen wrote:
> Hello,
>
> I'm trying to add a DTD at runtine to my XML. I use the following code (I hope you can read the Delphi 
> syntax)
>
> dtd := XMLParseDTD(nil, 'mydtd.dtd');
> if (rootNode^.ns=nil) or (rootNode^.ns^.prefix=nil) then
>   dtd^.name := rootNode^.name
> else
>   dtd^.name := PChar(rootNode^.ns^.prefix+':'+rootNode^.name);
> xmlDoc^.intSubset := dtd;
> if (xmlDoc^.children=nil) then
>   xmlAddChild(xmlNodePtr(xmlDoc), xmlNodePtr(dtd))
> else
>   xmlAddPrevSibling(xmlDoc^.children, xmlNodePtr(dtd));
>
> My problem is that I get an Access Violation in XMLFreeDoc(xmlDoc) after the DTD has been added. Am I 
> missing something?  The DTD is added allright because it shows up in a call to xmlDocMemoryDump.

  Seems to me the semantic of your dtd^.name :=  code doesn't make the
string allocated via xmlMalloc or the document dictionnary so it is likely
to generate big problems when freeing the DTD node.

> I have another question as well. Is it possible to add a DTD from memory (<!ATTLIST SOAP-ENV:Body wsu:Id ID 
> #IMPLIED>)?

  Not that I can think of. Anyway I *strongly* suggest using xml:id instead
of trying to fool the parser into using an inexistent DTD.
   http://www.w3.org/TR/xml-id/ 
Get the right tool for the job, messing around with DTD added on-the-fly
which basically does not match anything in the XML recommendation is non
portable, hackish and will be a maintainance headache !

Daniel

-- 
Daniel Veillard      | Red Hat Desktop team http://redhat.com/ 
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/ 
http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/