SOAP call by Shellscript using curl

curl --header "Content-Type: text/xml;charset=UTF-8" \
 --header "SOAPAction:action" --data @- \
 --request POST http://host:port/urlo << EOF
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:pre="...">
   <soapenv:Header/>
   <soapenv:Body>
      <pre:userName>dummy</pre:userName>
   </soapenv:Body>
</soapenv:Envelope>
EOF