API triggers issue(sync long-polling): UIPath studio http activity get error message

[donfeng91]

Hello everyone,
I was using UiPath studio http activity to make a API triggers in order to request an online robot task and receive the result. But I get the error message as below. Besides, I can use Postman get the result perfectly with no error.

"message": "{\"type\":\"https://tools.ietf.org/html/rfc9110#section-15.5.2\",\"title\":\"Unauthorized\",\"status\":401,\"traceId\":\"00-2bbca4480be204f552c003c03496496c-d5a2680320b8e7cf-00\"}",

And it is important to note that the code mode is set to sync long-polling. If set to async it works well in http activity.

I am looking forward to your answer. Thanks.

[Sharath_HK (Sharath Keshavamurthy)]

Hi @donfeng91

401 error relates to unauthorized request issue. Could you please check if authorization details are being passed correctly?

[donfeng91]

As you can see below, I use the same UiPath process to run to request API trigger in which I only change the call mode.

This picture is requesting the Async polling mode. It works well.

And this picture is requesting the Sync long-polling mode. It encounters the exception.

Both process I run above didn’t change anything of the process. This is my http request configration:

This picture is that I use postman to make a request under the Sync long-polling mode and it runs perfectly.

I read the link article in the error message, but there is no help.

[EduardS (Eduard Stanculet)]

Orchestrator - Settings

Probably the Require Authentication header for sync API Triggers redirects setting is enabled. Sync calls will not work when the client automatically follows redirects and this setting is enabled.