SOAP Action WSDL

Question

I'm trying to implement a client for National Rail Enquiries' SOAP Service (http://www.livedepartureboards.co.uk/ldbws/).

I stick the WSDL (http://realtime.nationalrail.co.uk/ldbws/wsdl.aspx) into http://soapclient.com/soaptest.html, but I get back the error message "Unable to handle request without a valid action parameter. Please supply a valid soap action."; what on earth should the action be?

Thanks, Stewart

edit:

I just used soapclient.com as a quick example. In my software, I send the following XML; I still get that I'm missing an action.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="http://thalesgroup.com/RTTI/2008-02-20/ldb/" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" xmlns:ldbt2="http://thalesgroup.com/RTTI/2008-02-20/ldb/types" xmlns:ldbt="http://thalesgroup.com/RTTI/2007-10-10/ldb/types" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:ct="http://thalesgroup.com/RTTI/2007-10-10/ldb/commontypes" >
 <SOAP-ENV:Body>
  <ldbt2:GetDepartureBoardRequest xmlns:ldbt2="http://thalesgroup.com/RTTI/2008-02-20/ldb/" >
   <ldbt2:numRows>5</ldbt2:numRows>
   <ldbt2:crs>WAT</ldbt2:crs>
   <ldbt2:filterCrs>GLD</ldbt2:filterCrs>
   <ldbt2:filterType>to</ldbt2:filterType>
   <ldbt2:timeOffset>0</ldbt2:timeOffset>
  </ldbt2:GetDepartureBoardRequest>
 </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Answer 1

If its a SOAP 1.1 service then you will also need to include a SOAPAction HTTP header field:

http://www.w3.org/TR/2000/NOTE-SOAP-20000508/#_Toc478383528