Destination failure for Resource Consumption API of SAP API Business Hub

[MMonis]

Hi,

I am trying to connect to the Resource Consumption API of the API Business Hub from my custom CAP application. I am using the Destination service and the Usage data management (uas) service for this purpose.

I have created a destination of type OAuth2Password based on the clientid, client secret, url details from the service key of the Usage data management (uas) service instance.

However when I test the destination connection, it throws a 401 Unauthorized error.

If I use the same clientid, client secret and url through a terminal using the curl command as documented in Configuration for Using the Resource Consumption APIs in the SAP API Business Hub:

I successfully get in return an access token. If I then use this access token as bearer token in postman to query the Resource Consumption API, I get a successful response.

Can someone provide some guidance in how to get the destination to work, so my CAP app could use this destination to fetch the info from the API ?

Regards,

Melwyn

[ManolV]

Hi Melwyn,

"However when I test the destination connection, it throws a 401 Unauthorized error."

"Check Connection" functionality in SAP BTP cockpit allows the user to check if the technical communication protocol specific connection can be established, in this case the protocol is HTTP. OAuth flow is based on HTTP and it's out of scope of the "Check Connection" functionality. This is the reason the colour of the status of the check is green and in the message one can find more details.

Have you tried to consume your created/modelled destination from within an app, or directly using the Destination service REST API, specifically the "Find a destination" one? When working with the REST API, you can use Curl or Postman.

Note: Looking at the screenshots, the URL in the destination is holding only the HTTP host without any HTTTP Path, while in the Postman screenshot, specific HTTP Path is passed to the URL, which might also contribute to your error experience.

Kind Regards,
Manol

[MMonis]

Hi manolvalchev,

Thanks for your response and providing inputs to this.

Here are some further inputs based on your suggestion.

"Check Connection" functionality: What confuses me is that it throws a 401 Unauthorized. I have another destination which connects to the Accounts Service API of the API Business Hub which very much uses the same auth type, user, password and token url. The only differences being the url (which offcourse is the url to the accounts service api), client id and client secret (based on the values from the service key for the cloud management service - cis instance). When I do a check connection on the Accounts Service API destination, I instead get the 404: Not found message instead and this works fine when consumed from my CAP application. I was expecting that the Resource Consumption destination would also give a 404: Not found instead of 401: unauthorized.

"consume your created/modelled destination from within an app" : I tried this by consuming the destination within my CAP application and it failed. I did not get the auth token in response. Consuming the other Accounts service destination worked fine with a successful response.

"complete http path": I tried this out as well with different path options yet got the 401 Unauthorized.

"directly using the Destination service REST API, specifically the "Find a destination" one" : I tried this out using the option in the API business hub "Try Out" option and configuring the environment. I was able to get a successful response with the destination details and the auth token

If I then take the returned auth token and query the endpoint https://uas-reporting.cfapps.eu10.hana.ondemand.com/reports/v1/monthlySubaccountsCost?fromDate=20221... I get the expected response data.

Would I have to go through this approach of "find destination" in my cap application and then consume the access token or is there a better way to consume the destination directly ?

Regards,

Melwyn

[InesMartins1]

Hi,

Did you find the solution?
I have the same problem.

Regards,
Ines Martins