how to update soap response namespace value with wso2 ei

Question

I have a proxy service to expose a soap api on wso2 ei, and i need to update the namespace value of the soap response with my proxy service and return another namespace value. I have tried with the enrich mediator as follows inside the outsequence.

<property name="namespace"
               scope="default"
               type="STRING"
               value="http://tempuri-updated.org/"/>
      <enrich>
        <source clone="false" property="namespace" type="property"/>
        <target xmlns:ser="http://services.samples"
                xmlns:ns="http://org.apache.synapse/xsd"
                xpath="namespace-uri($body/*)/text()"/>
     </enrich>

I get this error.

ERROR - EnrichMediator Invalid Target object to be enrich.

my actual soap response is as follows

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <soap:Body>
      <AddResponse xmlns="http://tempuri.org/">
         <AddResult>12</AddResult>
      </AddResponse>
   </soap:Body>
</soap:Envelope>

my expected output as follows

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <soap:Body>
      <AddResponse xmlns="http://tempuri-updated.org/">
         <AddResult>12</AddResult>
      </AddResponse>
   </soap:Body>
</soap:Envelope>

All your feedbacks are welcome

Thishani Lucas Thishani Lucas · Accepted Answer · 2019-04-02T16:34:10

This cannot be done with the enrich mediator. Because in the code related to enrich mediator target handling [1], the parsed result of an xpath expression should be one of SOAPHeaderImpl, OMElement, OMText or OMAttribute. Since namespace-uri() is just returning a string value, the target to be enriched is becoming invalid. As an alternative to this use case, we can do an XSLT transformation using the XSLT mediator. Following is a sample XSL style sheet I tried.

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:template match="@* | comment() | processing-instruction()">
    <xsl:copy/>
    </xsl:template>

   <xsl:template match="*">
       <xsl:element name="{local-name()}"
             namespace="http://tempuri-updated.org/">
       <xsl:apply-templates select="@* | node()"/>
       </xsl:element>
    </xsl:template>

We can refer this style sheet in the XSLT mediator before sending the response out from the EI. The new namespace will be added to the body.

how to update soap response namespace value with wso2 ei

2 Answers