On Nov 2, 6:03 pm, David Kahn <[email protected]> wrote:
> On Tue, Nov 2, 2010 at 3:59 PM, David Kahn <[email protected]>wrote:
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> > On Tue, Nov 2, 2010 at 3:50 PM, David Kahn
> > <[email protected]>wrote:
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> >> On Tue, Nov 2, 2010 at 3:22 PM, Marnen Laibow-Koser <[email protected]
> >> > wrote:
>
> >>> David Kahn wrote in post #958607:
> >>> > Cant seem to find an answer to this on google:
>
> >>> > If I have this value as the text within an attribute in my xml source:
> >>> > "a2/PP00nFwWa7I8Jog7bcw==\n"
>
> >>> > When I ask Nokogiri to return it, why does it return this:
> >>> > "a2/PP00nFwWa7I8Jog7bcw== " (the last character I confirmed in the
> >>> > debugger
> >>> > as a space character). So it seems Nokogiri is converting the "\n" to a
> >>> > space.
>
> >>> > Is there a way to tell Nokogiri to return verbatim? I am dealing with
> >>> > encrypted data and this modification which it is making to the xml
> >>> > source is
> >>> > significant?
>
> >>> You probably need to use the xml:space attribute in your source
> >>> document, or at least that's the impression I get from
> >>>http://msdn.microsoft.com/en-us/library/ms256097.aspx.
>
> >> Thanks Marnen - that was a really good idea, I just tried it in the
> >> console and it does not seem to help for the "\n" (results below) is it
> >> possible there is some other setting which would preserve the "\n"? This is
> >> really strange to me as these characters are within a string literal.. but
> >> it actually does also surprise me about the spaces.
>
> >> # without the xml:space="preserve"
> >> ruby > doc_enc = "<BORROWER
> >> _SSN=\"a2/PP00nFwWa7I8Jog7bcw==\n\"></BORROWER>"
> >> => "<BORROWER _SSN=\"a2/PP00nFwWa7I8Jog7bcw==\n\"></BORROWER>"
> >> ruby > Nokogiri::XML(doc_enc)
> >> => #<Nokogiri::XML::Document:0x12ff91c name="document"
> >> children=[#<Nokogiri::XML::Element:0x12ff71e name="BORROWER"
> >> attributes=[#<Nokogiri::XML::Attr:0x12ff6d8 name="_SSN"
> >> value="a2/PP00nFwWa7I8Jog7bcw== ">]>]>
> >> ruby > nd = Nokogiri::XML(doc_enc)
> >> => #<Nokogiri::XML::Document:0x12fded2 name="document"
> >> children=[#<Nokogiri::XML::Element:0x12fdcac name="BORROWER"
> >> attributes=[#<Nokogiri::XML::Attr:0x12fdc3e name="_SSN"
> >> value="a2/PP00nFwWa7I8Jog7bcw== ">]>]>
> >> ruby > nd.xpath("BORROWER").attribute("_SSN").value
> >> => "a2/PP00nFwWa7I8Jog7bcw== "
>
> >> # with xml:space=\"preserve\"
> >> ruby > doc_enc = "<BORROWER xml:space=\"preserve\"
> >> _SSN=\"a2/PP00nFwWa7I8Jog7bcw==\
> >> => "<BORROWER xml:space=\"preserve\"
> >> _SSN=\"a2/PP00nFwWa7I8Jog7bcw==\n\"></BORROWER>"
> >> ruby > Nokogiri::XML(doc_enc) => #<Nokogiri::XML::Document:0x12f7244
> >> name="document" children=[#<Nokogiri::XML::Element:0x12f708c
> >> name="BORROWER"
> >> attributes=[#<Nokogiri::XML::Attr:0x12f705a name="space"
> >> namespace=#<Nokogiri::XML::Namespace:0x12f6f56 prefix="xml" href="
> >>http://www.w3.org/XML/1998/namespace";> value="preserve">,
> >> #<Nokogiri::XML::Attr:0x12f7050 name="_SSN" value="a2/PP00nFwWa7I8Jog7bcw==
> >> ">]>]>
> >> ruby >
> >> nd.xpath("BORROWER").attribute("_SSN").value =>
> >> "a2/PP00nFwWa7I8Jog7bcw== "
> >> ruby >
>
> > What seems even more insane is that if I wrap the encrypted string in
> > characters (pipe in this case), it still takes away my "\n":
>
> > => "<BORROWER xml:space=\"preserve\"
> > _SSN=\"|a2/PP00nFwWa7I8Jog7bcw==\n|\"></BORROWER>"
> > ruby-1.9.2-p0 >
> > Nokogiri::XML(doc_enc)
> > => #<Nokogiri::XML::Document:0x12eb1d8 name="document"
> > children=[#<Nokogiri::XML::Element:0x12eafd0 name="BORROWER"
> > attributes=[#<Nokogiri::XML::Attr:0x12eaf94 name="space"
> > namespace=#<Nokogiri::XML::Namespace:0x12eaea4 prefix="xml" href="
> >http://www.w3.org/XML/1998/namespace";> value="preserve">,
> >*#<Nokogiri::XML::Attr:0x12eaf8a
> > name="_SSN" value="|a2/PP00nFwWa7I8Jog7bcw== |">]>]>*
>
> Sorry for all the addl posts but *also* in CDATA!!! Can the chars "\n"
> *never* mean anything but newline in our world?
Take a deep breath. I believe you are quoting your strings
incorrectly. Witness the following script, which behaves as expected
on Nokogiri 1.4.3.1 and libxml 2.7.6:
require 'rubygems'
require 'nokogiri'
xml = '<root><foo _SSN="a2/PP00nFwWa7I8Jog7bcw==\n">bar</foo></
root>'
puts Nokogiri::XML.parse(xml).to_xml
# => <?xml version="1.0"?>
# <root>
# <foo _SSN="a2/PP00nFwWa7I8Jog7bcw==\n">bar</foo>
# </root>
Next time you may want to try the nokogiri-talk mailing list for a
quicker response from users of the library.
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