Rails - Oct 2010 - Re: Loading xml document using Nokogiri and retrieving CDATA element SOLVED

SOLVED: Guess posting this got me more curious and I figured it out:

If I ask for
my_file.xpath("//EMBEDDED_FILE/DOCUMENT").text

Nokogiri automatically takes the content within the cdata element within the
DOCUMENT node and returns it to me without the cdata. Nice. So just a case
of making things harder for myself.



On Sun, Oct 31, 2010 at 4:59 PM, David Kahn
<dk-rfEMNHKVqOwNic7Bib+Ti1W1rNmOCjRP@public.gmane.org>wrote:
> This is an extension of my last post (problems with REXML) which has me
> looking to Nokogiri again. The reason I am not using Nokogiri is I can not
> seem to find a way to get CDATA out of a Nokogiri document.
>
> First, can you tell me if I am loading my document correctly, because when
> I call my_document.to_xml, I only get one line back:
>
> (rdb:1) test_file = Nokogiri::XML(mismo_xml_file)
> #<Nokogiri::XML::Document:0x5dd22 name="document">
> (rdb:1) test_file.to_xml
> "<?xml version=\"1.0\"?>\n"
>
> So maybe this is the first step and if I get the full doc to load, my cdata
> will be there?!!
>
> Alternatively, if you have a code snippet of loading a doc and successfully
> getting CDATA out, that would be a great help!
>
> Thanks in advance,
>
> David
>
>
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David,

Just to add some context, what you experienced pretty much applies to
all lanuages that offer access to xml, and the reason is the W3C XML
specification requires this behavior. When any XML parser reads the
XML, CDATA sections are not preserved. The text property returns the
text node of an element and if the element happens to have a CDATA
section, then the text part if it is returned along with any other
text content of the element.


On Oct 31, 4:09 pm, David Kahn
<d...-rfEMNHKVqOwNic7Bib+Ti1W1rNmOCjRP@public.gmane.org>
wrote:
> SOLVED: Guess posting this got me more curious and I figured it out:
>
> If I ask for
> my_file.xpath("//EMBEDDED_FILE/DOCUMENT").text
>
> Nokogiri automatically takes the content within the cdata element within
the
> DOCUMENT node and returns it to me without the cdata. Nice. So just a case
> of making things harder for myself.
>
> On Sun, Oct 31, 2010 at 4:59 PM, David Kahn
<d...-rfEMNHKVqOwNic7Bib+Ti1W1rNmOCjRP@public.gmane.org>wrote:
>
>
>
> > This is an extension of my last post (problems with REXML) which has
me
> > looking to Nokogiri again. The reason I am not using Nokogiri is I can
not
> > seem to find a way to get CDATA out of a Nokogiri document.
>
> > First, can you tell me if I am loading my document correctly, because
when
> > I call my_document.to_xml, I only get one line back:
>
> > (rdb:1) test_file = Nokogiri::XML(mismo_xml_file)
> > #<Nokogiri::XML::Document:0x5dd22 name="document">
> > (rdb:1) test_file.to_xml
> > "<?xml version=\"1.0\"?>\n"
>
> > So maybe this is the first step and if I get the full doc to load, my
cdata
> > will be there?!!
>
> > Alternatively, if you have a code snippet of loading a doc and
successfully
> > getting CDATA out, that would be a great help!
>
> > Thanks in advance,
>
> > David
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On Sun, Oct 31, 2010 at 5:29 PM, Chris
<Chris-WFo5Yo47r5cd9SLi6J12IkEOCMrvLtNR@public.gmane.org> wrote:
> David,
>
> Just to add some context, what you experienced pretty much applies to
> all lanuages that offer access to xml, and the reason is the W3C XML
> specification requires this behavior. When any XML parser reads the
> XML, CDATA sections are not preserved. The text property returns the
> text node of an element and if the element happens to have a CDATA
> section, then the text part if it is returned along with any other
> text content of the element.
>
Thanks Chris, that is helpful to know, so I wont make that same mistake with
another xml parser.
>
>
> On Oct 31, 4:09 pm, David Kahn
<d...-rfEMNHKVqOwNic7Bib+Ti1W1rNmOCjRP@public.gmane.org> wrote:
> > SOLVED: Guess posting this got me more curious and I figured it out:
> >
> > If I ask for
> > my_file.xpath("//EMBEDDED_FILE/DOCUMENT").text
> >
> > Nokogiri automatically takes the content within the cdata element
within
> the
> > DOCUMENT node and returns it to me without the cdata. Nice. So just a
> case
> > of making things harder for myself.
> >
> > On Sun, Oct 31, 2010 at 4:59 PM, David Kahn
<d...-rfEMNHKVqOwNic7Bib+Ti1W1rNmOCjRP@public.gmane.org
> >wrote:
> >
> >
> >
> > > This is an extension of my last post (problems with REXML) which
has me
> > > looking to Nokogiri again. The reason I am not using Nokogiri is
I can
> not
> > > seem to find a way to get CDATA out of a Nokogiri document.
> >
> > > First, can you tell me if I am loading my document correctly,
because
> when
> > > I call my_document.to_xml, I only get one line back:
> >
> > > (rdb:1) test_file = Nokogiri::XML(mismo_xml_file)
> > > #<Nokogiri::XML::Document:0x5dd22
name="document">
> > > (rdb:1) test_file.to_xml
> > > "<?xml version=\"1.0\"?>\n"
> >
> > > So maybe this is the first step and if I get the full doc to
load, my
> cdata
> > > will be there?!!
> >
> > > Alternatively, if you have a code snippet of loading a doc and
> successfully
> > > getting CDATA out, that would be a great help!
> >
> > > Thanks in advance,
> >
> > > David
>
> --
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