Bypass Identity Manager with ArcGIS.com OAuth token object

IanKramer3

Hi All,
I know this is similar to a recent post, but I think its different enough to merit its own thread.  I want to access one of my feature layers (using REST Url) from my organization's ArcGIS.com using the OAuth token generated using the methodology show here: https://developers.arcgis.com/en/authentication/app-logins.html.  That works great, and I got the JSON token. However now, I am unsure how to pass that JSON token in my JS app to prevent the Identify Manager login from appearing.  Initially I thought that I could pass it in the FeatureLayer's credential property, but that looks like it only returns when the feature layer is loaded.  I looked at one sample that stores the Identity Manager on the local system, but the "kernel.id.initialize(token)" statement does not seem to work either.  I do see that IdentityManagerBase has a registerToken function, but I can't seem to figure out how to implement that.

Can somebody please provide me with a code snippet on how this is done?

Thanks!

Ian

IanKramer3

I was able to figure this out.  The first thing you will need to do is generate a REST request to get the access token.

https://www.arcgis.com/sharing/oauth2/token?client_id=APPID&client_secret=APPSECRET&grant_type=client_credentials

This will return back a Json token object where TOKEN STRING is the automatically generated token string from the system.

{"access_token":"TOKEN STRING","expires_in":7199}

Now in your JavaScript code, add "esri/IdentityManagerBase" and "esri/kernel" to your requires.  Should look like this.

require([
        "esri/map", "esri/InfoTemplate", "esri/layers/FeatureLayer",
        "dojo/parser", "esri/IdentityManagerBase", "esri/kernel", "dojo/domReady!"
      ], function(
        Map, InfoTemplate, FeatureLayer,
        parser, IMB, kernel
      ) {....

Then in your code, create a Json object like this:

var token = {"server": "http://www.arcgis.com/sharing/rest",
          "userId":"USERID",
          "token": "TOKEN STRING",
          "ssl":false,
          "expires":7200};

Make sure to include your ArcGIS.com userid and the token that you got above.

Then call the following statement to register the token object to the IdentityManager

kernel.id.registerToken(token);

Then you can add your feature layers. 

Hope that helps!

Ian