[xsl] calling a web service from XSLT

Subject: [xsl] calling a web service from XSLT
From: Francis Norton <francis@xxxxxxxxxxx>
Date: Fri, 31 May 2002 16:27:29 +0100
(Apologies to xml-dev readers who may have seen my related message)

It's not a theoretical breakthrough or anything like that, but I thought xsl-list readers might be interested in a working example of calling a Web Service from XSLT.

For files like this:

   <card number="00000000000000"/>

you can run (with msxsl.exe - the "https:" URL appears to break saxon) the following transform:

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; version="1.0" xmlns:cdyne="http://ws.cdyne.com/";>
<xsl:output indent="yes"/>
<xsl:variable name="CheckCC" select="'https://secure.cdyne.com/creditcardverify/luhnchecker.asmx/CheckCC?CardNumber='" />
<!-- -->
<!-- do a "pass-through" type transform -->
<xsl:template match="@* | node()">
<xsl:apply-templates select="@* | node()"/>
<!-- -->
<!-- for everything except elements in the target namespace -->
<xsl:template match="card">
<xsl:attribute name="CardValid">
<xsl:value-of select="document(concat($CheckCC, @number))/cdyne:ReturnIndicator/cdyne:CardValid = 'true'" />
<xsl:apply-templates select="@* | node()"/>
<!-- -->

to get each card element marked up with a CardValid attribute containing a boolean true or false.

Not something I'd use in production lightly, and limited to Web Services with an HTTP GET binding, but satisfactory in its way.


XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list

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