RE: [xml] In-memory catalog

["Daniel Gehriger" <gehriger linkcad com>]

Daniel,

Thanks for the information. I tried your approach, and use
xmlParserInputBufferCreateMem() (see below) in my custom entity loader.
But xmlParseFile() always returns NULL if I do that. Can't I use
xmlParserInputBufferCreateMem() for this ?
Also, is there a way to pass some information in the xmlParserCtxtPtr to
the entity loader (the doc says it's SAX only).

- Daniel

...
// redirect external entity loader
defaultLoader = xmlGetExternalEntityLoader();
xmlSetExternalEntityLoader(externalEntityLoader);
...

xmlParserInputPtr externalEntityLoader(const char* url, 
                                       const char* id, 
                                       xmlParserCtxtPtr ctxt)
{
  if (url && stricmp(url, "http://myhost/DTD/1.0/mydtd.dtd";) == 0) {
    xmlParserInputPtr input = xmlNewInputStream(ctxt);
    input->filename = NULL;
    input->directory = NULL;
    input->buf = xmlParserInputBufferCreateMem(g_dtd, g_dtdLen,
XML_CHAR_ENCODING_ASCII);
    input->base = input->buf->buffer->content;
    input->cur = input->buf->buffer->content;
    input->end = &input->buf->buffer->content[input->buf->buffer->use];
    return input;
  }
  else
    return (*defaultLoader)(url, id, ctxt);
}



> -----Original Message-----
> From: xml-admin gnome org [mailto:xml-admin gnome org] On 
> Behalf Of Daniel Veillard
> Sent: Friday, 05 April, 2002 19:50
> To: Daniel Gehriger
> Cc: xml gnome org
> Subject: Re: [xml] In-memory catalog
>
>
> On Fri, Apr 05, 2002 at 07:21:01PM +0200, Daniel Gehriger wrote:
> > Hello,
> >
> > I'm defining a XML doctype to be used only by one of my 
> applications. 
> > I would like to use the DOCTYPE as an external subset in the XML 
> > files:
> >
> > ...
> > <!DOCTYPE FXML SYSTEM "http://myhost/DTD/1.0/mydtd.dtd";>
> > ...
> >
> > While I can (and will) store the DTD at the specified URL, I would 
> > like my applications to use a local copy of it. That's what 
> catalogs 
> > are for, right ? Ok, but I don't want to install a catalog file, as 
> > this adds one more file that will break the application if it is 
> > missing. Rather, I
>
>   Then simply override the default entity loader to make it point 
> to your in-memory resource:
>     http://xmlsoft.org/xmlio.html#entities
>
> Daniel
>
> -- 
> Daniel Veillard      | Red Hat Network https://rhn.redhat.com/
> veillard redhat com  | libxml GNOME XML XSLT toolkit  
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