Pass http header value to the web service consumer - mule

Question

I am trying to pass the http header value as the web service consumer,
httpHeader
I use this property as web service input,
<dw:transform-message doc:name="Transform Message">
<dw:set-payload><![CDATA[%dw 1.0
%output application/xml
%namespace ns0 namespace
---
{
ns0#GetProject: {
ns0#projectId: inboundProperties."http.query.params".projectId,
ns0#upi: inboundProperties.sm_user
}
}]]></dw:set-payload>
</dw:transform-message>
I have also tried setting the sm_user to a variable and trying to access the variable in TransformMessage as below, but the same error,
<dw:transform-message doc:name="Transform Message">
<dw:set-payload><![CDATA[%dw 1.0
%output application/xml
%namespace ns0 namespace
---
{
ns0#GetProject: {
ns0#projectId: inboundProperties."http.query.params".projectId,
ns0#upi: flowVars.setUPI
}
}]]></dw:set-payload>
</dw:transform-message>
Error:
Server was unable to read request. ---> There is an error in XML document (3, 32). ---> Input string was not in a correct format.. Message payload is of type: ElementNSImpl
Transform XML using the SM_USER header:
<?xml version='1.0' encoding='windows-1252'?>
<ns0:GetProject xmlns:ns0="namespace">
<ns0:projectId xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
<ns0:upi xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
</ns0:GetProject>
Flow XML:
<flow name="ProjectEC">
<dw:transform-message doc:name="Transform Message">
<dw:set-payload><![CDATA[%dw 1.0
%output application/xml
%namespace ns0 namespace
---
{
ns0#GetProject: {
ns0#projectId: inboundProperties."http.query.params".projectId ,
ns0#upi: inboundProperties.SM_USER
}
}]]></dw:set-payload>
</dw:transform-message>
<ws:consumer config-ref="ECDataService_Consumer" operation="GetProject" doc:name="ECWebServiceConsumer"/>
<mulexml:dom-to-xml-transformer doc:name="DOM to XML"/>
<json:xml-to-json-transformer doc:name="XML to JSON"/>
<set-variable variableName="extractJsondata" value="#[json:GetProjectResponse/GetProjectResult]" mimeType="application/json" doc:name="Variable"/>
<set-payload value="#[flowVars.extractJsondata]" doc:name="Set Payload"/>
<json:xml-to-json-transformer doc:name="XML to JSON"/>
</flow>
Can someone tell me if I am missing something.
Thanks

Answer 1

Few checks
Check whether your xml is the exact format which your webservice is really looking for. or
Change the encoding from encoding='windows-1252' to UTF-8. Follow the url Output Encoding issue in mule esb. or
As trial and error version directly use the xml in postman to hit webservice ( without making dataweave to do the transformation). or
Make sure you have no space <?xml version='1.0' encoding="UTF-8"?> before starting of xml greater sysmbol tag.
Check the above 4 steps anyone of this might cause issue. Step 3 will be helpful for testing.