adding SOAP header in SOAP envelope using XSLT - xslt

Question

i have an incoming SOAP message where there were no SOAP header tag present i need to add SOAP header in that. I am using this XSLT for doing this but SOAP HEADER is not getting added.
XSLT:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:dp="http://www.datapower.com/extensions"
xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
extension-element-prefixes="dp"
exclude-result-prefixes="dp" >
<xsl:variable name="uuid" select="dp:variable('var://context/txn/uuid')" />
<xsl:template match="node()|#*">
<xsl:copy>
<xsl:apply-templates select="node()|#*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="soapenv:Header">
<soapenv:Header>
<UUID><xsl:value-of select="$uuid"/></UUID>
</soapenv:Header>
</xsl:template>
</xsl:stylesheet>
The incomig SOAP mesagge can have header tag or it might not have header tag
Input SOAP Message Without Header tag:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Body>
<hmhs-medical-acknowledgement id="4080186649" result="FAIL""/>
</soapenv:Body>
</soapenv:Envelope>
Input SOAP Message With Header tag:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header/>
<soapenv:Body>
<hmhs-medical-acknowledgement id="4080186649" result="FAIL""/>
</soapenv:Body>
</soapenv:Envelope>
Required Output SOAP Message:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header>
<UUID>71A4B2FA029D412787B06E07685ED101</UUID>
</soapenv:Header>
<soapenv:Body>
<hmhs-medical-acknowledgement id="4080186649" result="FAIL""/>
</soapenv:Body>
</soapenv:Envelope>
Can somebody help how to add the SOAP header in that.

Answer 1

AFAICT, you want to do:
XSLT 1.0
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:dp="http://www.datapower.com/extensions"
xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
extension-element-prefixes="dp">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:variable name="uuid" select="dp:variable('var://context/txn/uuid')" />
<!-- identity transform -->
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="/soapenv:Envelope">
<xsl:copy>
<soapenv:Header>
<UUID><xsl:value-of select="$uuid"/></UUID>
</soapenv:Header>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>
<xsl:template match="soapenv:Header"/>
</xsl:stylesheet>