Using WSO2 FHIR Connector - rest

Question

I'm trying the FHIR Connector with WSO2 EI 6.1.0
I'm following this documentation
The request for the create operation is:
{
"body": {
"base": "https://sqlonfhir-stu3.azurewebsites.net",
"type": "Patient",
"format": "json"
}
}
My proxy is:
<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
name="fhirTest"
startOnLoad="true"
statistics="disable"
trace="disable"
transports="http,https">
<target>
<inSequence>
<property expression="json-eval($.body.base)"
name="base"
scope="default"
type="STRING"/>
<property expression="json-eval($.body.type)"
name="type"
scope="default"
type="STRING"/>
<property expression="json-eval($.body.format)"
name="format"
scope="default"
type="STRING"/>
<fhir.init>
<base>{$ctx:base}</base>
</fhir.init>
<fhir.create>
<type>{$ctx:type}</type>
<format>{$ctx:format}</format>
</fhir.create>
<send/>
</inSequence>
<outSequence/>
<faultSequence/>
</target>
<parameter name="ApplicationXMLBuilder.allowDTD">true</parameter>
<description/>
</proxy>
After the request the response is (the body is void):
HTTP/1.1 202 Accepted
X-Frame-Options: DENY
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Content-Type: text/html;charset=UTF-8
Content-Length: 0
Date: Fri, 05 May 2017 14:09:01 GMT
Server: WSO2 Carbon Server
but I get the following exception: DOCTYPE is not allowed
log:
[2017-05-05 16:09:01,192] [] INFO - LogMediator To: /services/fhirTest,From: 192.168.81.118,Direction: request,base1 = https://sqlonfhir-stu3.azurewebsites.net
,type1 = Patient,format1 = json,Payload: {
"body": {
"base": "https://sqlonfhir-stu3.azurewebsites.net",
"type": "Patient",
"format": "json"
}
}
[2017-05-05 16:09:01,704] [] ERROR - RelayUtils Error while building Passthrough stream
org.apache.axiom.om.OMException: javax.xml.stream.XMLStreamException: DOCTYPE is not allowed
at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:296)
at org.apache.axiom.om.impl.llom.OMDocumentImpl.getOMDocumentElement(OMDocumentImpl.java:109)
at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:570)
at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:566)
at org.apache.synapse.transport.passthru.util.DeferredMessageBuilder.getDocument(DeferredMessageBuilder.java:160)
at org.apache.synapse.transport.passthru.util.RelayUtils.builldMessage(RelayUtils.java:136)
at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:99)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.buildMessage(Axis2SynapseEnvironment.java:817)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:546)
at org.apache.synapse.mediators.builtin.SendMediator.mediate(SendMediator.java:118)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:97)
at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:281)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.mediateFromContinuationStateStack(Axis2SynapseEnvironment.java:775)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:282)
at org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:554)
at org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:188)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
at org.apache.synapse.transport.passthru.ClientWorker.run(ClientWorker.java:262)
at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: javax.xml.stream.XMLStreamException: DOCTYPE is not allowed
at org.apache.axiom.util.stax.dialect.DisallowDoctypeDeclStreamReaderWrapper.next(DisallowDoctypeDeclStreamReaderWrapper.java:36)
at org.apache.axiom.om.impl.builder.StAXOMBuilder.parserNext(StAXOMBuilder.java:681)
at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:214)
... 21 more
[2017-05-05 16:09:01,709] [] ERROR - Axis2SynapseEnvironment Error while building message
org.apache.axis2.AxisFault: Error while building Passthrough stream
at org.apache.synapse.transport.passthru.util.RelayUtils.handleException(RelayUtils.java:283)
at org.apache.synapse.transport.passthru.util.RelayUtils.builldMessage(RelayUtils.java:142)
at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:99)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.buildMessage(Axis2SynapseEnvironment.java:817)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:546)
at org.apache.synapse.mediators.builtin.SendMediator.mediate(SendMediator.java:118)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:97)
at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:281)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.mediateFromContinuationStateStack(Axis2SynapseEnvironment.java:775)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:282)
at org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:554)
at org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:188)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
at org.apache.synapse.transport.passthru.ClientWorker.run(ClientWorker.java:262)
at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.axiom.om.OMException: javax.xml.stream.XMLStreamException: DOCTYPE is not allowed
at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:296)
at ...
[2017-05-05 16:11:03,952] [] WARN - SynapseCallbackReceiver Synapse received a response for the request with message Id : urn:uuid:c14afbec-7e12-4c9a-be5e-0746
53fed0e6 But a callback is not registered (anymore) to process this response
My questions are:
Has anyone been able to take the correct tests by following the guide?
How do I pass the other data to create the resource fhir (further base, type and format) as described here?
Thanks in advance
UPDATE: After I have enabled messageBuilder and messageFormatter (as suggested by Hariprasath) the previus error is resolved
but now I have an other error:
[2017-05-10 16:42:20,891] [] DEBUG - RelayUtils Content Type is application/fhir+json; charset=utf-8
[2017-05-10 16:42:20,893] [] ERROR - Axis2Sender Unexpected error during sending message out
java.lang.NullPointerException
at org.apache.coyote.http11.InternalNioOutputBuffer.addToBB(InternalNioOutputBuffer.java:211

Answer 1

This is because of the response is an HTML page(with the content-type is in text/html format). Usually, we need to enable the following formatter and builder to avoid this error and supports text/html format. Please add following message builders and formatters to the sections in /repository/conf/axis2/axis2.xml.
<messageBuilder contentType="text/html"
class="org.wso2.carbon.relay.BinaryRelayBuilder"/>
<messageFormatter contentType="text/html"
class="org.wso2.carbon.relay.ExpandingMessageFormatter"/>

Answer 2

Make sure that you add/enable builders and formatter for "text/html" in /repository/conf/axis2/axis2.xml file.
<messageFormatter contentType="text/html"
class="org.wso2.carbon.relay.ExpandingMessageFormatter"/>
[1] https://github.com/wso2-extensions/esb-connector-fhir/blob/master/src/test/INTEGRATION-TEST.txt