Solved: How to dynamic return ServiceCallout response to C... - Page 2

IvanFreire · 10-03-2024 06:23 AM

Hello, I have a proxy with more than one ServiceCallouts, and I want to make a generic RaiseFault in case of error in my ServiceCallouts. The problem is that I want to return the status code of my ServiceCallout, and I just can return the content body.

I created this RaiseFault to catch my ServiceCallout errors, as you can see the <serviceCallout>.status.code doesn't work. The only way I could make this working was to put the ServiceCalloutResponse variable on the status code, but by doing this I will have to create a RaiseFault for each ServiceCallout policy.

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<RaiseFault async="false" continueOnError="false" enabled="true" name="RF-ServiceCalloutHandler">
    <DisplayName>RF-ServiceCalloutErrorHandler</DisplayName>
    <FaultRules/>
    <Properties/>
    <FaultResponse>
        <Set>
            <Payload contentType="application/json">
                {
                "type": "SERVICE CALLOUT ERROR",
                "message": {ServiceCallout.response}// works
                }
            </Payload>
            <StatusCode>{Dynamic.status.code}</StatusCode> // not working
            <ReasonPhrase>Gateway Exception</ReasonPhrase>
        </Set>
    </FaultResponse>
    <IgnoreUnresolvedVariables>true</IgnoreUnresolvedVariables>
    <ShortFaultReason>false</ShortFaultReason>
</RaiseFault>

Proxy

                <Step>
                    <FaultRules/>
                    <Name>SC-MyServiceCallout</Name>
                </Step>
                <Step>
                    <Condition>(calloutResponse.status.code != 200)</Condition>
                    <Name>RF-ServiceCalloutHandler</Name>
                </Step>

IvanFreire

(I don't like this solution because it uses regex to get the error code)

I made a JS to get the ServiceCallout error code dynamic.

So, if my callout error code, is not a success.code it throw a exception, then I check on DefaultFaultRule if its a ServiceCallout error.
I used this repo as example:

Github - ServiceCalloutHandler

JS:

const SERVICE_CALLOUT_ERROR = "steps.servicecallout.ExecutionFailed"
const errorBody = JSON.parse(error.content);
const regex = /ResponseCode (\d+)/;

function handleCalloutError() {

    const fault = errorBody.fault.faultstring;
    const detail = errorBody.fault.detail.errorcode;

    var match = fault.match(regex);
    var statusCode = match ? match[1] : 500;

    return {
        isServiceCalloutError: detail == SERVICE_CALLOUT_ERROR,
        statusCode: statusCode
    }
}

const serviceCalloutError = handleCalloutError()

context.setVariable("is_service_callout_error",serviceCalloutError.isServiceCalloutError);
context.setVariable("service_callout_error_code", serviceCalloutError.statusCode);

RaiseFault:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<RaiseFault async="false" continueOnError="false" enabled="true" name="RF-ServiceCalloutHandler">
    <DisplayName>RF-ServiceCalloutErrorHandler</DisplayName>
    <FaultRules/>
    <Properties/>
    <FaultResponse>
        <Set>
            <Payload contentType="application/json">
                {ServiceCallout.response}
            </Payload>
            <StatusCode>{service_callout_error_code}</StatusCode>
            <ReasonPhrase>Gateway Exception</ReasonPhrase>
        </Set>
    </FaultResponse>
    <IgnoreUnresolvedVariables>true</IgnoreUnresolvedVariables>
    <ShortFaultReason>false</ShortFaultReason>
</RaiseFault>

Proxy:

<Step>
    <FaultRules/>
    <Name>JS-ExtractServiceCalloutError</Name>
    <Condition>(fault.name Matches "ExecutionFailed")</Condition>
</Step>
<Step>
    <FaultRules/>
    <Name>RF-ServiceCalloutHandler</Name>
    <Condition>(fault.name Matches "ExecutionFailed") and (is_service_callout_error == true)</Condition>
</Step>

View solution in original post

How to dynamic return ServiceCallout response to Client?

Proxy