Re: change the att value and name of a node (Visual C++ && DOM - ) - XML / XSL Discussion Boards

Re: How to make conditions or filter the xml node using XSL

Riaan Lehmkuhl6-Jul-08 19:53

Riaan Lehmkuhl

6-Jul-08 19:53

If I've got your sample correct:

<root>
    <child>
        <node>
            <childnode>ITEM</childnode>
            <childnode>DESC</childnode>
        </node>
        <node>
            <childnode>ITEM1</childnode>
            <childnode>DESC1</childnode>
        </node>
    </child>
    <child>
        <node>
            <childnode>ORDER</childnode>
            <childnode>DESC</childnode>
        </node>
    </child>
</root>

You can use XPath to filter the result:

<xsl:for-each select="//node[starts-with(string(childnode),'ITEM')]">
	<xsl:value-of select="position()"/>
	<xsl:text> </xsl:text>
</xsl:for-each>

This should print out 1 2 as it will select the first two node elements.

Using XSLT contains()

Rob Grainger4-Jul-08 5:06

Rob Grainger

4-Jul-08 5:06

Hi,

I'm trying to work out how to do the following..

Within an XML data source, each <data-item> has a <countries> element containing a comma-separated list of country-codes e.g.

<data-item> <countries>GBR,ARG,IRL</countries> </data-item>

Within the XSLT I've build a lookup like...

<CountryList><Country><Code>GBR</Code><Name>United Kingdon</Name></Country></CountryList>.

I want to get a list of all the countries, in <CountryList> order, for which there are entries in one or more <countries> elements.

I've tried using exsl:node-set to build a set of nodes from the CountryList, then for-each to iterate those nodes, but can't work out how, within the for-each, to get an if test to work (somehow using contains() to see if the code for that country is within any <countries> element).

Anyone got any suggestions?

Colorfull string

half-life2-Jul-08 19:39

half-life

2-Jul-08 19:39

Hi,
i'm really new to XML, XSL

i'm trying to show a string that is Generated by a Given Loaigcal Algorithem From a JS Function
(I.E if status is Failed so Display XXXX if Passed XXYY .... )
i'm trying to give The String some Colors Like :
I'm (In blue) Trying (In Red)
any IDEA???

Have Fun
Never forget it

Re: Colorfull string

led mike3-Jul-08 6:00

led mike

3-Jul-08 6:00

what does displaying colored text using javascript have to do with XML and XSLT?

half-life wrote:
Generated by a Given Loaigcal Algorithem

What does Loaigcal mean?

led mike

Re: Colorfull string

half-life3-Jul-08 6:08

half-life

3-Jul-08 6:08

The Function Input is A Result of a Test
That Could Be "failed", Passed", "Done", Termineted"...
an more cases of ( what where the Limits (High,Low) of a Test in a Test
that is a Numeric Test .....)

and More Smile | :)

But THANKS i Found A way
By Spliting The Return String of The Function Into an []
and Wraping Each String In The Array with a Diff Color

THANKS ANYWAY Smile | :)

Have Fun
Never forget it

change the att value and name of a node (Visual C++ && DOM - )

SimplySane2-Jul-08 7:09

SimplySane

2-Jul-08 7:09

1.) How do you change the the attribute value of a certain node?? Or add an attribute to a node??

Say for example:

<book id="bk112" status="New">

Then you want to change the status value to "Old" and add another attribute like Cover="SoftBound".

The IXMLDOMNode::Getattributes() can be used to get the attributes of a node. This will return a ptr to IXMLDOMNamedNodeMap. To access each attribute, the Getitem() function which will return a ptr to IXMLDOMNode. I know how to get the attributes name and value but to change it, it seems like Im stuck... I can see a setAttribute() function in IXMLDOMElement... It looks like the answer to my first question.. BUT, how am I gonna implement when the Getitem returns a ptr to IXMLDOMNode and not to IXMLDOMElement?? IXMLDOMElement inherits from IXMLDOMNode but this can't be solve by casting...

2. How can IXMLDOMNode be converted to IXMLDOMElement??

ANy ideas please?? or any solution..

Thanks!

Re: change the att value and name of a node (Visual C++ && DOM - )

led mike2-Jul-08 10:11

led mike

2-Jul-08 10:11

SimplySane wrote:
IXMLDOMElement inherits from IXMLDOMNode but this can't be solve by casting...

If you are using COM interfaces then you use COM interfaces right? QueryInterface()? However for working with the MSXML DOM in C++ I recommend using #import to generate ATL code for you. If you do then you can cast because the ATL code will perform the QueryInterface for you. Wink | ;)

http://www.ddj.com/windows/184416877[^]

led mike

Re: change the att value and name of a node (Visual C++ && DOM - )

SimplySane6-Jul-08 6:18

SimplySane

6-Jul-08 6:18

Yes, you're right.. I was able to cast succesfully but I got a runtime error when I tried to use the setAttribute.. Here's what I did:

// assume I have a loop here
IXMLDOMNodePtr pAttN = pMapAtt->Getitem( y ); 
IXMLDOMElementPtr pAtt;

CString csOutAttName = static_cast<LPCTSTR>( pAttN->nodeName );
CString csOutAttText = static_cast<LPCTSTR>( pAttN->Gettext() );

pAtt = (IXMLDOMElementPtr) pAttN;
BSTR bstrOutAttName = csOutAttName.AllocSysString();
pAtt->setAttribute( bstrOutAttName, static_cast<_variant_t>( csInAttText ) );
::SysFreeString( bstrOutAttName );

I've got an exception in this line:

pAtt->setAttribute( bstrOutAttName, static_cast<_variant_t>( csInAttText ) );

Looking up at setAttribute function, it has this syntax:
setAttribute(BSTR, VARIANT)

I havn't figure out what's causing the problem here and Im thinking that passing the _variant_t to a VARIANT might be the problem?? (Assuming I cast the right way..)So I've tried searching for ways on how to cast CString to VARIANT, but didn't find anything that works..

Any idea please... Thanks!

Re: change the att value and name of a node (Visual C++ && DOM - )

led mike7-Jul-08 11:15

led mike

7-Jul-08 11:15

first why use CString unless you are manipulating the string value?

this should work

pAtt->setAttribute( pAttN->nodeName, pAttN->Gettext());

When you must have a BSTR variable prefer using _bstr_t rather than LPCSTR or

CString<br />
<br />
_bstr_t sname = pAttN->nodeName;<br />
_bstr_t svalue = pAttN->Gettext();<br />
<br />
pAtt->setAttribute(sname,svalue);<br />

Take a look at _bstr_t it has built in conversions to/from BSTRT-LPCTSTR I believe, I haven't worked with this stuff for a couple years now, but I think it's comprehensive, ctors that take either and conversion operators that get either so all you do is cast to the type you want.

led mike

Calculating DigestValue over URI - URGENT HELP VERY MUCH APPRECIATED

Andy H2-Jul-08 4:34

Andy H

2-Jul-08 4:34

I am trying to digitally sign an XML document in C++. Yes, I know that it is easy in .NET 2.0, but alas cannot use that!

An extract of the XML document is below.

All I am trying to do is calculate the DigestValue over the XML sub-document with Id=MsgOperation. I know that the data from this sub-document is converted into a hash with SHA-1 and then Base64.

The problem I am having is converting the sub-document using EXEC-C14N. I am trying to use the LibXML2 library (very good), to EXEC-C14N the sub-document with:

[code]
CString CDigitalCerts::C14N( const char* pszXml, const bool bExclusive )
{
CString sRet = _T("");
xmlChar* pOutput = NULL;
xmlDocPtr pXmlDoc = xmlReadMemory( pszXml, (int)strlen( pszXml ), _T("xml"), NULL, 0 );
int result = 0;
void* pData = NULL;

xmlOutputBufferPtr buf = 0;

if ( pXmlDoc )
{
result = xmlC14NDocDumpMemory( pXmlDoc,
NULL,
(int)bExclusive,
NULL,
0,
&pOutput );
}

xmlFreeDoc( pXmlDoc );

if ( result > 0 )
{
sRet = (LPCTSTR)pOutput;
}

xmlFree( pOutput );
pOutput = NULL;

return sRet;
}
[/code]

If anyone has used the xmlC14NDocDumpMemory function before from the libxml2 library and can advise what I need to add to its 2nd argv (nodes) or the 4th argv (inclusive_ns_prefixes), I would appreciate it. Or what the <ns1:operation ...="" xmlns:ns1="#unknown"> node once EXEC_C14N'ed looks like I would again be very grateful.

[code]
<?xml version="1.0" encoding="utf-8"?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header>
<ns1:Operation Id="MsgOperation" soapenv:mustUnderstand="0" xsi:type="xsd:string" xmlns:ns1="http://www.ros.ie/schemas/service/" xmlns:xsi="http://w
ww.w3.org/2001/XMLSchema-instance">CT1/File</ns1:Operation>
<wsse:Security xmlns:wsse="http://schemas.xmlsoap.org/ws/2002/07/secext">

...

<ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
<ds:SignedInfo>
<ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
<ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
<ds:Reference URI="#MsgOperation">
<ds:Transforms>
<ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
</ds:Transforms>
<ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
<ds:DigestValue></ds:DigestValue>
</ds:Reference>

...

</ds:SignedInfo>
<ds:SignatureValue>
</ds:SignatureValue>
<ds:KeyInfo>
<wsse:SecurityTokenReference>
<wsse:Reference URI="#X509Token"/>
</wsse:SecurityTokenReference>
</ds:KeyInfo>
</ds:Signature></wsse:Security> </soapenv:Header>
[/code]

Re: Calculating DigestValue over URI - URGENT HELP VERY MUCH APPRECIATED

led mike2-Jul-08 4:45

led mike

2-Jul-08 4:45

Andy H wrote:
If anyone has used the xmlC14NDocDumpMemory function before from the libxml2 library

No, I have never used the libxml2 library.

Andy H wrote:
can advise what I need to add to its 2nd argv (nodes) or the 4th argv (inclusive_ns_prefixes),

Does this help[^]?

led mike

Re: Calculating DigestValue over URI - URGENT HELP VERY MUCH APPRECIATED

Andy H2-Jul-08 5:14

Andy H

2-Jul-08 5:14

Well what was the point of your reply? How f******* stupid.

Re: Calculating DigestValue over URI - URGENT HELP VERY MUCH APPRECIATED

led mike2-Jul-08 6:36

led mike

2-Jul-08 6:36

Andy H wrote:
Well what was the point of your reply?

The point was the link I supplied that appears to define the parameters you asked about, you f***ing moron. F*** off a**hole.

led mike

Re: Calculating DigestValue over URI - URGENT HELP VERY MUCH APPRECIATED

Andy H2-Jul-08 10:08

Andy H

2-Jul-08 10:08

I am very sorry, I did not spot the link in your reply.

Thanks, but I have seen the page you referred to.

Re: Calculating DigestValue over URI - URGENT HELP VERY MUCH APPRECIATED

led mike2-Jul-08 10:18

led mike

2-Jul-08 10:18

Andy H wrote:
I am very sorry, I did not spot the link in your reply.

Oh, ok, no problem, simple mistake, I make them all the time, I even make complicated mistakes. Big Grin | :-D

Andy H wrote:
Thanks, but I have seen the page you referred to.

Ok then I need more specific information about what you need to know.

nodes: Is a NodeSet that will act like a filter so that it will only dump those nodes rather than the entire document.

inclusive_ns_prefixes: Is a string array of the namespaces, where the last element of the array is NULL.

Based on the doc you can pass NULL for both of those and it should still work.

led mike

Re: Calculating DigestValue over URI - URGENT HELP VERY MUCH APPRECIATED

Andy H2-Jul-08 10:46

Andy H

2-Jul-08 10:46

I am currently parsing NULL to both those arguments. But because I am extracting the node with the Id attribute set to "MsgOperation", I am obviously missing namespace declarations etc that are in the parent node, as a result my computed DigestValue is incorrect.

All I require at the moment is for someone to let me know what the EXEC_C14N result of the said node which is then fed into the SHA-1 algorithm and Base64'ed the result of which (i.e. DigestValue) is:

wJsL4RtLToFeHW/xt2ewbAAiNxk=

That way at least I could get some idea of what the node is transformed into as a result of the EXEC_C14N process!

Re: Calculating DigestValue over URI - URGENT HELP VERY MUCH APPRECIATED

led mike2-Jul-08 11:07

led mike

2-Jul-08 11:07

Andy H wrote:
All I require at the moment is for someone to let me know what the EXEC_C14N result of the said node

Sorry, I don't have an environment established where I can do that. Since you have the XML yourself why can't you just give the namespace argument to the function?

led mike

Re: Calculating DigestValue over URI - URGENT HELP VERY MUCH APPRECIATED

Andy H2-Jul-08 12:26

Andy H

2-Jul-08 12:26

I tried that, didn't work. I will be working on it further tomorrow. If I get it to work I will post what I did to resolve the issue.

Re: Calculating DigestValue over URI - URGENT HELP VERY MUCH APPRECIATED

Andy H3-Jul-08 3:03

Andy H

3-Jul-08 3:03

Just to let anyone know, if they are interested, that I have manually worked out the result of the EXEC-C14N for the //ns1:Operation node of the XML posted in my orriginal message above, to be:

[code]
<ns1:Operation xmlns:ns1="http://www.ros.ie/schemas/service/" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" Id="MsgOperation" soapenv:mustUnderstand="0" xsi:type="xsd:string">CT1/File</ns1:Operation>
[/code]

This helped

Re: Calculating DigestValue over URI - URGENT HELP VERY MUCH APPRECIATED

led mike3-Jul-08 5:58

led mike

3-Jul-08 5:58

Andy, I'm glad you solved your problem.

The only difference in your solution XML from your original post is the addition of

<br />
xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"

If that was the question you were asking I never even got close to understanding your question.

led mike

Re: Calculating DigestValue over URI - URGENT HELP VERY MUCH APPRECIATED

Andy H3-Jul-08 6:27

Andy H

3-Jul-08 6:27

When you Canonicalize an XML sub-document you need to ensure that the namespace declarations used within that node but which were originally declared in an ancester node you need to re-declare in the node in which the namespace is being used in the sub-document. Then having done that you need to ensure that the namespace declarations are in order as per their prefix, AND any attributes but not in alphabetical order of the attribute or its prefix (if used) but per the order of the URI of that prefix... Get it!!!

Having solved that I have a much larger XML node structure extracted from the orginal XML document to sort out along the same lines. All good fun.

If you read the page to which I gave a link it makles it clearer, much clearer than many books I have read on Canonicalization.

Re: Calculating DigestValue over URI - URGENT HELP VERY MUCH APPRECIATED

led mike3-Jul-08 6:41

led mike

3-Jul-08 6:41