WSO API Manager hide some information of the request of BODY - wso2

Question

In API Manager version 3.0.0, I try to hide some information of the request, example:
The service is: https://API/v1/client with the method GET, the request is similar to:
[
{
"id": 1,
"nickname": "Example",
"name": "LUIS",
...
"_links": {
"self": {
"href": "https://API/v1/client/3/settings"
}
}
}
]
But I have to hide the information relative to _links.
My idea is in Publisher Page -> Runtime Configurations add a sequence in Message Mediation in the Request.
Is possible to do or not?
Edit
Answer to Vithursa M, I don't know what was a error but after to restart my PC the policy add whit any problem. When and Try Out send this error:
Also in terminal sends:
ERROR - RelayUtils Error while building Passthrough stream
org.apache.axiom.om.OMException: com.ctc.wstx.exc.WstxUnexpectedCharException: Unexpected character '[' (code 91) in prolog; expected '<'
at [row,col {unknown-source}]: [1,1]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:296) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.llom.OMDocumentImpl.getOMDocumentElement(OMDocumentImpl.java:109) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:570) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:566) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.synapse.transport.passthru.util.DeferredMessageBuilder.getDocument(DeferredMessageBuilder.java:165) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:168) [synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:121) [synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.synapse.mediators.AbstractListMediator.buildMessage(AbstractListMediator.java:152) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:95) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:158) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.mediate_aroundBody0(APIManagerExtensionHandler.java:72) [org.wso2.carbon.apimgt.gateway_6.5.349.jar:?]
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.mediate(APIManagerExtensionHandler.java:57) [org.wso2.carbon.apimgt.gateway_6.5.349.jar:?]
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.handleResponse_aroundBody4(APIManagerExtensionHandler.java:127) [org.wso2.carbon.apimgt.gateway_6.5.349.jar:?]
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.handleResponse(APIManagerExtensionHandler.java:115) [org.wso2.carbon.apimgt.gateway_6.5.349.jar:?]
at org.apache.synapse.rest.API.process(API.java:364) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.rest.RESTRequestHandler.apiProcessNonDefaultStrategy(RESTRequestHandler.java:149) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:95) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:58) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:325) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:578) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:195) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180) [axis2_1.6.1.wso2v38.jar:?]
at org.apache.synapse.transport.passthru.ClientWorker.run(ClientWorker.java:284) [synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172) [axis2_1.6.1.wso2v38.jar:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: com.ctc.wstx.exc.WstxUnexpectedCharException: Unexpected character '[' (code 91) in prolog; expected '<'
at [row,col {unknown-source}]: [1,1]
at com.ctc.wstx.sr.StreamScanner.throwUnexpectedChar(StreamScanner.java:639) ~[axiom_1.2.11.wso2v16.jar:?]
at com.ctc.wstx.sr.BasicStreamReader.nextFromProlog(BasicStreamReader.java:2052) ~[axiom_1.2.11.wso2v16.jar:?]
at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1134) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.util.stax.wrapper.XMLStreamReaderWrapper.next(XMLStreamReaderWrapper.java:225) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.util.stax.dialect.DisallowDoctypeDeclStreamReaderWrapper.next(DisallowDoctypeDeclStreamReaderWrapper.java:34) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.parserNext(StAXOMBuilder.java:681) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:214) ~[axiom_1.2.11.wso2v16.jar:?]
... 27 more
[2020-02-14 09:49:24,217] ERROR - SequenceMediator Error while building message. Error while building Passthrough stream
org.apache.axis2.AxisFault: Error while building Passthrough stream
at org.apache.synapse.transport.passthru.util.RelayUtils.handleException(RelayUtils.java:432) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:214) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:121) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.synapse.mediators.AbstractListMediator.buildMessage(AbstractListMediator.java:152) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:95) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:158) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.mediate_aroundBody0(APIManagerExtensionHandler.java:72) [org.wso2.carbon.apimgt.gateway_6.5.349.jar:?]
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.mediate(APIManagerExtensionHandler.java:57) [org.wso2.carbon.apimgt.gateway_6.5.349.jar:?]
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.handleResponse_aroundBody4(APIManagerExtensionHandler.java:127) [org.wso2.carbon.apimgt.gateway_6.5.349.jar:?]
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.handleResponse(APIManagerExtensionHandler.java:115) [org.wso2.carbon.apimgt.gateway_6.5.349.jar:?]
at org.apache.synapse.rest.API.process(API.java:364) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.rest.RESTRequestHandler.apiProcessNonDefaultStrategy(RESTRequestHandler.java:149) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:95) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:58) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:325) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:578) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:195) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180) [axis2_1.6.1.wso2v38.jar:?]
at org.apache.synapse.transport.passthru.ClientWorker.run(ClientWorker.java:284) [synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172) [axis2_1.6.1.wso2v38.jar:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: org.apache.axiom.om.OMException: com.ctc.wstx.exc.WstxUnexpectedCharException: Unexpected character '[' (code 91) in prolog; expected '<'
at [row,col {unknown-source}]: [1,1]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:296) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.llom.OMDocumentImpl.getOMDocumentElement(OMDocumentImpl.java:109) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:570) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:566) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.synapse.transport.passthru.util.DeferredMessageBuilder.getDocument(DeferredMessageBuilder.java:165) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:168) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
... 22 more
Caused by: com.ctc.wstx.exc.WstxUnexpectedCharException: Unexpected character '[' (code 91) in prolog; expected '<'
at [row,col {unknown-source}]: [1,1]
at com.ctc.wstx.sr.StreamScanner.throwUnexpectedChar(StreamScanner.java:639) ~[axiom_1.2.11.wso2v16.jar:?]
at com.ctc.wstx.sr.BasicStreamReader.nextFromProlog(BasicStreamReader.java:2052) ~[axiom_1.2.11.wso2v16.jar:?]
at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1134) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.util.stax.wrapper.XMLStreamReaderWrapper.next(XMLStreamReaderWrapper.java:225) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.util.stax.dialect.DisallowDoctypeDeclStreamReaderWrapper.next(DisallowDoctypeDeclStreamReaderWrapper.java:34) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.parserNext(StAXOMBuilder.java:681) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:214) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.llom.OMDocumentImpl.getOMDocumentElement(OMDocumentImpl.java:109) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:570) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:566) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.synapse.transport.passthru.util.DeferredMessageBuilder.getDocument(DeferredMessageBuilder.java:165) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:168) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
... 22 more
[2020-02-14 09:49:24,220] ERROR - admin--Alquimia2 Error while building message. Error while building Passthrough stream
org.apache.axis2.AxisFault: Error while building Passthrough stream
at org.apache.synapse.transport.passthru.util.RelayUtils.handleException(RelayUtils.java:432) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:214) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:121) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.synapse.mediators.AbstractListMediator.buildMessage(AbstractListMediator.java:152) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:95) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:158) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.mediate_aroundBody0(APIManagerExtensionHandler.java:72) [org.wso2.carbon.apimgt.gateway_6.5.349.jar:?]
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.mediate(APIManagerExtensionHandler.java:57) [org.wso2.carbon.apimgt.gateway_6.5.349.jar:?]
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.handleResponse_aroundBody4(APIManagerExtensionHandler.java:127) [org.wso2.carbon.apimgt.gateway_6.5.349.jar:?]
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.handleResponse(APIManagerExtensionHandler.java:115) [org.wso2.carbon.apimgt.gateway_6.5.349.jar:?]
at org.apache.synapse.rest.API.process(API.java:364) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.rest.RESTRequestHandler.apiProcessNonDefaultStrategy(RESTRequestHandler.java:149) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:95) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:58) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:325) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:578) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:195) [synapse-core_2.1.7.wso2v131.jar:2.1.7-wso2v131]
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180) [axis2_1.6.1.wso2v38.jar:?]
at org.apache.synapse.transport.passthru.ClientWorker.run(ClientWorker.java:284) [synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172) [axis2_1.6.1.wso2v38.jar:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: org.apache.axiom.om.OMException: com.ctc.wstx.exc.WstxUnexpectedCharException: Unexpected character '[' (code 91) in prolog; expected '<'
at [row,col {unknown-source}]: [1,1]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:296) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.llom.OMDocumentImpl.getOMDocumentElement(OMDocumentImpl.java:109) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:570) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:566) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.synapse.transport.passthru.util.DeferredMessageBuilder.getDocument(DeferredMessageBuilder.java:165) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:168) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
... 22 more
Caused by: com.ctc.wstx.exc.WstxUnexpectedCharException: Unexpected character '[' (code 91) in prolog; expected '<'
at [row,col {unknown-source}]: [1,1]
at com.ctc.wstx.sr.StreamScanner.throwUnexpectedChar(StreamScanner.java:639) ~[axiom_1.2.11.wso2v16.jar:?]
at com.ctc.wstx.sr.BasicStreamReader.nextFromProlog(BasicStreamReader.java:2052) ~[axiom_1.2.11.wso2v16.jar:?]
at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1134) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.util.stax.wrapper.XMLStreamReaderWrapper.next(XMLStreamReaderWrapper.java:225) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.util.stax.dialect.DisallowDoctypeDeclStreamReaderWrapper.next(DisallowDoctypeDeclStreamReaderWrapper.java:34) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.parserNext(StAXOMBuilder.java:681) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:214) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.llom.OMDocumentImpl.getOMDocumentElement(OMDocumentImpl.java:109) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:570) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:566) ~[axiom_1.2.11.wso2v16.jar:?]
at org.apache.synapse.transport.passthru.util.DeferredMessageBuilder.getDocument(DeferredMessageBuilder.java:165) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:168) ~[synapse-nhttp-transport_2.1.7.wso2v131.jar:?]
... 22 more

Answer 1

If your input payload is like:
{
"element": [
{
"id": 1,
"nickname": "Example",
"name": "LUIS",
"_links": {
"self": {
"href": "https://API/v1/client/3/settings"
}
}
}
]
}
You can use following mediation policy to remove the "_links" attribute from the payload, using script mediator.
<sequence xmlns="http://ws.apache.org/ns/synapse" name="sampleSeq">
<script language="js"><![CDATA[
var payload = mc.getPayloadJSON();
var elements = payload.element;
for (var i=0; i < elements.length; i++){
if (elements[i].hasOwnProperty("_links")) {
delete elements[i]["_links"];
}
}
mc.setPayloadJSON(payload);
]]></script>
<send/>
</sequence>