AssignMessage to set header name from a variable

[m0uad]

Hello,

I need to assign a header name and value from variables. While the second is possible with variable interpolation, I couldn't find a way to do the same the header name. If Assign Message policy isn't compatible with such use case, I can use whatever other policy or script.

Please help!

[dchiesa1 · Accepted solution]

Within AssignMessage, The Header VALUE can be set via a variable.  The Header NAME cannot. 

<AssignMessage name='AM-Set-Header'>
  <Set>
    <Headers>
      <!-- 
        using this syntax, the value in the variable named 'variable1'
        will be set into the header 'Fixed-Name'
      -->
      <Header name='Fixed-Name'>{variable1}</Header>
    </Headers>
  </Set>
</AssignMessage>

But you can use JavaScript to set values into headers that have dynamically-determined names.

<JavaScript name='JS-Set-Dynamic-Header'>
  <Source>
  var n = context.getVariable('name-of-header-to-set');
  var v = context.getVariable('variable-containing-value');
  context.setVariable('request.header.' + n, v);
  </Source>
</JavaScript>

[m0uad]

works great!