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Invoke a backend call using GatewayScript

Using IBM DataPower Gateway, sometimes you need to handle some "complicated" RESTful services, usually each service gets a matching & processing rules, but what if you need to support different processing scenarios for the same URL with different HTTP verbs/methods?

DataPower Matching Rule object will not support the Method option for a Response rule, so here is a simple solution - just handle the whole processing flow in a request rule (using the magic of 'skip-backside' service variable).

This GatewayScript will handle the backend call and let you continue the flow with any processing action you need.

How to use it?

  1. Drag a GatewayScript processing action and select the 'invoke-backend.js' file, set the Input of the action to the relevant value.

  2. Go to the Advanced tab of the GatewayScript processing action and add a parameter named 'BaseURL' with the base-url value of your backend.

The default timeout is 30 seconds, if you want to override this settings, just add another parameter named 'Timeout' and set the desired value in seconds.