Java

Hotmail Refresh Access Token (also for Live.com, Outlook.com)

See more OAuth2 Examples

An OAuth2 access token is typically valid for 1 hour. Interaction with the Hotmail account owner via a browser is only needed for getting the initial access token. Once you have it, it can be continually refreshed without user interaction for a long time.

See: How Long can an OAuth2 Access Token be Refreshed?

Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.OAuth2;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        // It is assumed we previously obtained an OAuth2 access token.

        // Note: Refreshing an access token does not require user-interaction.
        // Only the act of getting the initial access token requires interactive authorization from the Hotmail account owner
        // (i.e. a browser is displayed and the Hotmail account owner authorizes access by the app).

        // Once you have the initial access token, it can be refreshed for a long time.
        // A typical strategy is to write your application to automatically refresh the access token
        // when authentication fails, and then retry the operation with the new access token.

        JsonObject jsonToken = new JsonObject();
        try {
            jsonToken.loadFile("qa_data/tokens/hotmail.json");
        } catch (ChilkatException e) {
            System.out.println("Failed to load office365.json");
            return;
        }

        // The access token JSON looks like this:

        // {
        //   "token_type": "Bearer",
        //   "scope": "https://outlook.office.com/SMTP.Send https://outlook.office.com/IMAP.AccessAsUser.All https://outlook.office.com/POP.AccessAsUser.All",
        //   "expires_in": 3600,
        //   "ext_expires_in": 3600,
        //   "access_token": "EwBoA+ ... 7pOYcWr5pFwQgI=",
        //   "refresh_token": "M.C546_BL2.0.U.-CkW ... g5CKSlDBQ$$",
        //   "id_token": "eyJ0e ... 2iiu5iqBK9n7s3A"
        // }

        OAuth2 oauth2 = new OAuth2();

        // See Microsoft OAuth2 Authorization Endpoint
        oauth2.setTokenEndpoint("https://login.microsoftonline.com/common/oauth2/v2.0/token");

        // Replace this with your actual App Registration's Application (client) ID.
        oauth2.setClientId("CLIENT_ID");

        // Get the "refresh_token"
        oauth2.setRefreshToken(jsonToken.stringOf("refresh_token"));

        // Send the HTTP POST to refresh the access token..
        try {
            oauth2.refreshAccessToken();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println(oauth2.getLastErrorText());

        System.out.println("New access token: " + oauth2.getAccessToken());
        System.out.println("New refresh token: " + oauth2.getRefreshToken());

        // Update the JSON with the new tokens.
        jsonToken.updateString("access_token", oauth2.getAccessToken());
        jsonToken.updateString("refresh_token", oauth2.getRefreshToken());

        // Save the new JSON access token response to a file.
        StringBuilder sbJson = new StringBuilder();
        jsonToken.setEmitCompact(false);
        jsonToken.emitSb(sbJson);
        sbJson.writeFile("qa_data/tokens/hotmail.json", "utf-8", false);

        System.out.println("OAuth2 authorization granted!");
        System.out.println("New Access Token = " + oauth2.getAccessToken());
    }
}