http-request-071 (AB)

The pipeline

<p:declare-step xmlns:err="http://www.w3.org/ns/xproc-error" xmlns:p="http://www.w3.org/ns/xproc" version="3.0">
   <p:output port="result"/>
   <p:http-request href="http://localhost:8246/service/echo" method="post" parameters="map{'override-content-type' : 'application/xml'}">
      <p:with-input>
         <p:inline content-type="text/plain">{{"key" : "value"}}</p:inline>
      </p:with-input>
   </p:http-request>
</p:declare-step>