To get a refresh token, you send a request to your Okta Authorization Server.
In the case of the Authorization Code flow, you use the Authorization Server's /authorize endpoint to get an authorization code, specifying an offline_access scope. You then send this code to the /token endpoint to get an access token and a refresh token. For more information about this endpoint, see Obtain an Authorization Grant from a User. For more information about the Authorization Code flow, see Implementing the Authorization Code Flow.
For the Resource Owner Password flow, you use the Authorization Server's /token endpoint directly. For more information about this endpoint, see Request a Token. For more information about the Resource Owner Password flow, see Implementing the Resource Owner Password Flow.
The following combinations of grant type and scope, when sent to /token endpoint, will return a refresh token:
| Grant Type | Scope |
|---|---|
authorization_code | offline_access (see Note) |
refresh_token | offline_access |
password | offline_access |
Note: The authorization code flow is unique, in that the
offline_accessscope has to be requested as part of the code request to the/authorizeendpoint, and not the request sent to the/tokenendpoint.
This table only shows the minimum requirements. For example, with the password grant type you can also include an openid scope alongside the offline_access scope:
POST https://${yourOktaDomain}/oauth2/default/v1/token
grant_type=password
&redirect_uri=http%3A%2F%2Flocalhost%3A8080
&username=example%40mailinator.com
&password=a.gReAt.pasSword
&scope=openid%20offline_access
You would then get back an ID token alongside your access and refresh tokens.
For more information see the Okta OAuth 2.0 reference page.
In a normal Single-Page Application (SPA) it is usually undesirable to redirect the user to a login page during normal navigation. For example, a user could request access to a resource, prompting your SPA to send a request to the Okta /authorize endpoint. Normally, if a user does not have a valid session, this request will result in a redirection to a login page. To avoid this disruptive redirection, the endpoint allows for a request parameter called prompt. If the value of the prompt parameter is none, this guarantees that the user will not be prompted to login, regardless of whether they have an active session or not. Instead, your application will either silently obtain the requested tokens or an OAuth error response. How to act on the error is up to you.
For more information on the /authorize endpoint, see the Authentication Request section of the OIDC Reference.