Using NodeJS app - getting access token from ArcGIS Online

geo-esri

Hello

I am creating simple NodeJS app with express as server. The goal is authorize to ArcGIS online using CLIENT_ID and redirect to /authenticate page to get the access token .

Step 1: Authorization

const session = await arcgisRest.ArcGISIdentityManager.beginOAuth2({

clientId: clientId,

redirectUri: redirecturi,

pcke:true

            });

 

The session has valid object "id":"MaLBpo4bA9dWkfDvuSN1SWYsGtlh0vkmvUUUPlQ5zU88","originalUrl":"http://localhost:3000/"

 

Step 2: 

 

Now, when I use this authorization code to connect to ArcGIS online to get access, the token throws an error

I am trying PKCE work flow from  : https://developers.arcgis.com/rest/users-groups-and-items/token/

 

I am encountering various errors, primarily related to invalid PKCE. The issue seems to be with the code_challenge_verifier. I used the appropriate cryptographic library to generate the code challenge, but it still fails with a 400 error.

 

I am looking for a good working sample.