Calling External API In Custom Task UI of SAP Build Process Automation

[verreydthans]

Hi,

We're using SAP Build Process Automation for setting up a new workflow.
We created also Custom UI's as described here:

- https://help.sap.com/docs/workflow-capability/workflow-cloud-foundry/creating-custom-task-ui
- https://help.sap.com/docs/build-process-automation/sap-build-process-automation/technical-informatio...

Now, we want to use odata services from the backend system in these custom UI's.

I already followed the blog (https://blogs.sap.com/2020/09/08/calling-external-api-in-custom-task-ui-of-workflow-in-cloud-foundry/) but still, we're facing issues when using the odata services (http 500 - Internal server error)

- Destination created in BTP Cockpit

- xs-app.json updated

    {
      "source": "^/S4HANA_Dev_Dest(.*)$",
      "target": "$1",
      "destination": "S4HANA_Development",
      "authenticationType": "none",
      "csrfProtection": false
    },    

- The steps for the mta file are a little bit confusing, as we're using the SAP Managed appRouter and so, we don't have the approuter as a module here...

- Manifest

        "dataSources": {
            "productDropdown": {
                "uri": "S4HANA_Dev_Dest/sap/opu/odata/sap/ZAPI_SRV",
                "type": "OData",
                "settings": {
                    "annotations": [],
                    "localUri": "localService/metadata.xml",
                    "odataVersion": "2.0"
                }
            }
        }

Our URL's of the odata calls are like (wich returns http 500): https://company.sap-process-automation.cfapps.eu10.hana.ondemand.com/appRouter.customui-0.0.1/S4HANA...

When using the app as a "standalone app" within the Launchpad Module, the destination is reachable and OKAY

https://company.launchpad.cfapps.eu10.hana.ondemand.com/appRouter.customui-0.0.1/S4HANA_Dev_Dest/sap...

Any thoughts?

Thx!

[verreydthans · Accepted solution]

Apparently, the SBPA managed appRouter doesn't use the Connectivity Service.

So, no Destinations can be used in customUI apps currently.

issue addressed to SAP!

[simonblaser_haufe · Accepted solution]

Hello Hans,

do you have any status updates? Is there a ticket or something to follow your request to SAP?

Thank you already