How to add additional information in the response? - wso2

Question

Scenario
I've integrated an external service in my API. In addition to the response from the external service, I want to add a few more JSON keys and values.
API
<?xml version="1.0" encoding="UTF-8"?>
<api context="/PhoneVerify" name="PhoneVerifi" xmlns="http://ws.apache.org/ns/synapse">
<resource methods="POST">
<inSequence>
<payloadFactory media-type="xml">
<format>
<soapenv:Envelope xmlns:cmpa="http://XXX.XXX.com" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://object.pmd.com/xsd">
<soapenv:Header/>
<soapenv:Body>
<cmpa:verify>
<!--Optional:-->
<cmpa:userName>XXXXX</cmpa:userName>
<!--Optional:-->
<cmpa:passwd>XXXXX</cmpa:passwd>
<!--Optional:-->
<cmpa:request>
<!--Optional:-->
<xsd:cnic>$1</xsd:cnic>
<!--Optional:-->
<xsd:msisdn>$2</xsd:msisdn>
<!--Optional:-->
<xsd:transactionID>$3</xsd:transactionID>
</cmpa:request>
</cmpa:verify>
</soapenv:Body>
</soapenv:Envelope>
</format>
<args>
<arg evaluator="json" expression="$.cnic"/>
<arg evaluator="json" expression="$.msisdn"/>
<arg evaluator="json" expression="$.transactionID"/>
</args>
</payloadFactory>
<log category="DEBUG" level="full"/>
<header name="Action" scope="default" value="verify"/>
<send>
<endpoint>
<address format="soap11" uri="https://XXXXX.com/CMPA/services/CnicMsisdnPairing.CnicMsisdnPairingHttpsSoap11Endpoint/">
<suspendOnFailure>
<initialDuration>-1</initialDuration>
<progressionFactor>1</progressionFactor>
</suspendOnFailure>
<markForSuspension>
<retriesBeforeSuspension>0</retriesBeforeSuspension>
</markForSuspension>
</address>
</endpoint>
</send>
</inSequence>
<outSequence>
<property name="messageType" scope="axis2" type="STRING" value="application/json"/>
<payloadFactory media-type="json">
<format>
{
"status" : "success"
"response": "$1"
}</format>
<args>
<arg evaluator="json" expression="$.verifyResponse.return"/>
</args>
</payloadFactory>
<property name="messageType" scope="axis2" type="STRING" value="application/json"/>
<respond/>
</outSequence>
<faultSequence>
<payloadFactory media-type="json">
<format>
{
"status" : "failure"
}</format>
<args/>
</payloadFactory>
</faultSequence>
</resource>
</api>
Response from External Service
"verifyResponse":{
"return" : {
"#type":"ax21:Response",
"message":"Duplicate Transaction ID",
"responseCode":"08",
"status":"00"
}
}
Desired Response
{
"status": "success"
"response": {
"#type":"ax21:Response",
"message":"Duplicate Transaction ID",
"responseCode":"08",
"status":"00"}
}
Question
My exact question is that when I try to achieve the above problem, I'm getting the response as shown below (basically its wrapped in " "). How can I make achieved the desired response?
{
"status": "success"
"response": "{"#type":"ax21:Response","message":"Duplicate Transaction ID","responseCode":"08","status":"00"}"
}

Answer 1

The Payload factory is adding " " since you have defined the argument $1 within " ". If you modify the Payload factory as below you should be able to get the desired output.
<payloadFactory media-type="json">
<format>
{
"status" : "success",
"response": $1
}
</format>
<args>
<arg evaluator="json" expression="$.verifyResponse.return"/>
</args>
</payloadFactory>
I have tried the above in the latest Integration Studio(8.1.0), if the above solution doesn't work please specify the MI version you are using.