[libxml-devel] Specifying namespace on XPath?

[keisuke fukuda]

I'm willing to do the work (adding unit tests and fixing the bug if I can)
if you don't mind :-)


2007/11/27, keisuke fukuda <keisukefukuda at gmail.com>:
> Hi,
>
> How to specify namespace on xpath in version 5.2.0 ?
>
> Someone told me that you can do it like this in version 3.8.4 :
> ---
> require "rubygems"
> require "xml/libxml" # 3.8.4
>
> doc = XML::Parser.string(<<EOS).parse
> <?xml version="1.0" encoding='utf-8'?>
> <service xmlns="http://www.w3.org/2007/app"
>          xmlns:atom="http://www.w3.org/2005/Atom">
>   <workspace>
>     <collection href="http://example.org/blog/main">
>       <atom:title>My Blog Entries</atom:title>
>     </collection>
>   </workspace>
> </service>
> EOS
>
> namespaces =  {
>   "app" => "http://www.w3.org/2007/app",
>   "atom" => "http://www.w3.org/2005/Atom"
> }.to_a
>
> p doc.find('/app:service/app:workspace/app:collection/atom:title', namespaces)
> __END__
>
> => <atom:title>My Blog Entries</atom:title>
>
> ---
>
> But, in 5.2.0, it saids
> " in `find': nested array must be an array of strings, prefix and
> href/uri (ArgumentError) "
>
> ( in Addition, it  SEGVs sometimes in normal interpreter and always in irb )
>
> Is this a bug ? (Or, is there any other way to do this in 5.2.0) ?
> I took a look at the source code and found that  there is almost no
> unit test about namespace on XPath.
>
> --
> FUKUDA, Keisuke
>


-- 
FUKUDA, Keisuke <$BJ!ED7=M4(B>
http://d.hatena.ne.jp/keisukefukuda/