Custom error message ?

Google Cloud Apigee
1

Is it possible to customize this error message and have something else instead of this one coming from apigee:

{“fault”:{“faultstring”:“Failed to resolve API Key variable request.queryparam.apikey”,“detail”:{“errorcode”:“steps.oauth.v2.FailedToResolveAPIKey”}}}

Cheers !

2

Hi @Sebastian Harko

Yes, you do that using Fault handling. You need to add FaultRules section in your API proxy configuration as described here When you encounter an error/exception all the policies under FaultRules will get executed. Based on the error, conditionally you could customize the message and send the error response back using RaiseFault policy.

Eg -

<RaiseFault name="fault_invalidkey">
  <FaultResponse>
    <Set>
      <Payload contentType="text/plain"> {request.header.username} have attempted to access a resource without the correct authorization. 
         Contact support at support@mycompany.com.</Payload>
      <StatusCode>401</StatusCode>
      <ReasonPhrase>Unauthorized</ReasonPhrase>
    </Set>
  </FaultResponse>
  <IgnoreUnresolvedVariables>true</IgnoreUnresolvedVariables>
</RaiseFault>