Re: [xml] Root node attributes

[Spartaco <spartaco dsplabs net>]

Thanks for the suggestion, but I was aware about that problem.
Adding a comment before the root node apparently doesn't break the code
at all:

<?xml version="1.0" encoding="UTF-8"?>
<!-- this is a comment -->
<Example agent="myclient">
  <value1>aaa</value1>  
</Example>

this one works fine.
Instead of iterating through nodes and testing for
xmlTextReaderNodeType(reader) I used the xmlTextReaderCurrentDoc /
xmlDocGetRootElement sequence because they should work anyway, no matter
how the XML is structured (and the code is much simpler).
Am I wrong?
I'd be very pleased if you could give me an XML example that you think
could really break my code.

SM

On 10/13/2014 11:32 AM, Daniel Veillard wrote:
> On Sat, Oct 11, 2014 at 02:16:31PM +0200, Spartaco wrote:
> > Well,
> > the simpliest solution I've found on my own is like that:
> >
> > xml = xmlReaderForFile("example.xml", NULL, 0);
> > xmlTextReaderRead(xml);
> > doc = xmlTextReaderCurrentDoc(xml);
> > root = xmlDocGetRootElement(doc);
> > agent = xmlGetProp(root, "agent");
> > ...
> >
> > and then proceed with the rest of parsing using the Reader interface, as
> > usual.
> > Do not forget to use xmlFreeDoc(doc) at the end of parsing.
>   Well that's not 100% guaranteed to work, the xmlTextReaderRead()
> will scan through all nodes. If there is another node (not element)
> before the root node, like say a comment, you code will break.
>   do Read() until you reach an element and use the reader
> to get the attribute.
>
> Daniel
> > On 10/11/2014 12:12 PM, Spartaco wrote:
> > > Hello guys,
> > >
> > > I'm just wondering if is there a simple way in LibXML2 to get an
> > > attribute value from the root node, preferably using the Reader interface.
> > > I have no problems at all with attributes from other nodes, they all are accessible by
> > > xmlTextReaderGetAttribute function, but root.
> > > Apparently LibXML2 discards root node attributes, or may be I'm missing something.
> > >
> > > Just to be clear, I intend to parse something like:
> > >
> > > <?xml version="1.0" encoding="UTF-8"?>
> > > <Example agent="myclient">
> > >   <value1>aaa</value1>  
> > > </Example>
> > >
> > > and I'd like to get the value of the "agent" attribute.
> > > Can someone give me an hint?
> > >
> > > Regards
> > > SM
> > >
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