Use variable for the namespace value in ExtractVariable policy

Google Cloud Apigee
1

I am trying to use a variable instead of hardcoding the namespace value inside the ExtractVariable policy for XML/SOAP payload. But it seems to not work. Am i missing something or is this functionality not available currently?

This is working fine. But i want to pass a variable instead of hardcoding “http://schemas.xmlsoap.org/soap/envelope/” just in case it changes in the future. I am just providing this namespace as example. I will have multiple namespaces.

<Namespaces>
  <Namespace prefix="soap">http://schemas.xmlsoap.org/soap/envelope/</Namespace>
</Namespaces>

Below is what i want to do. I tried using ref also but no luck

<Namespaces>
  <Namespace prefix="soap">{namespace1}</Namespace>
</Namespaces>
1 Like
2

I don’t think you can do that with ExtractVariables.

But maybe there is a workaround. There is an xpath function available in the Message Template, which you can use to extract data.

You would use dynamic namespaces like this:

<AssignMessage name='AM-Extract'>
  <AssignVariable>
    <Name>ns1</Name>
    <!-- prefix:namespace -->
    <Template>ns1:{actual_namespace_here}</Template>
  </AssignVariable>
  <AssignVariable>
    <Name>soap</Name>
    <!-- this one is hard-coded -->
    <Value>s:http://schemas.xmlsoap.org/soap/envelope/</Value>
  </AssignVariable>
  <AssignVariable>
    <Name>path1</Name>
    <Value>/s:Envelope/s:Body/ns1:getIDPListRequest/ns1:IDP/text()</Value>
  </AssignVariable>
  <AssignVariable>
    <Name>extracted</Name>
    <!--
        pass arguments to the xpath function as _variables_:
        1: query
        2: xml document (eg, maybe request.content)
        3...n : namespace specifiers, if any

        Do not insert spaces between the variable names or parens!

    -->
    <Template>{xpath(path1,xml,soap,ns1)}</Template>
  </AssignVariable>
</AssignMessage>