Java Requires Chilkat v10.1.2+

X.com OAuth 2.0 Refresh Access Token

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Demonstrates how to get an X.com OAuth2 access token from a desktop application or script. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.DateTime;
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.

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

        // The access token JSON looks something like this:

        // {
        //   "token_type": "bearer",
        //   "expires_in": 7200,
        //   "access_token": "VmNDLVZiYUZwejY5Mkx3RblFTmo3ek1leTRGclMuZFVOUTVUTWpNbVZKb1N5OjE3NDAxNjk4MDVxNTE6MToxOaF0OjE",
        //   "scope": "block.read follows.read offline.access tweet.write block.write like.write like.read users.read tweet.read follows.write",
        //   "refresh_token": "eThOWVVFSTRqdVp3QTFndGsxM2ZGZmFyNWVrU0phM1JKbGdrbGNWRGJzb1loOjE3NDAwMjk4MDUxNTI6MTowOnJ0OjE"
        // }

        OAuth2 oauth2 = new OAuth2();

        oauth2.setTokenEndpoint("https://api.x.com/2/oauth2/token");

        // Replace this with your actual X.com OAuth2 Client ID and Client Secret
        oauth2.setClientId("OAUTH2_CLIENT_ID");
        oauth2.setClientSecret("OAUTH2_CLIENT_SECRET");

        // 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;
        }

        // Load the access token response into the json object
        jsonToken.load(oauth2.getAccessTokenResponse());

        // If an "expires_on" member does not exist, then add the JSON member by
        // getting the current system date/time and adding the "expires_in" seconds.
        // This way we'll know when the token expires.
        if (!jsonToken.hasMember("expires_on")) {
            DateTime dtExpire = new DateTime();
            dtExpire.setFromCurrentSystemTime();
            dtExpire.addSeconds(jsonToken.intOf("expires_in"));
            jsonToken.appendString("expires_on", dtExpire.getAsUnixTimeStr(false));
        }

        // Save the new JSON access token response to a file.
        // The access + refresh tokens contained in this JSON will be needed for the next refresh.
        StringBuilder sbJson = new StringBuilder();
        jsonToken.setEmitCompact(false);
        jsonToken.emitSb(sbJson);
        sbJson.writeFile("qa_data/tokens/x.json", "utf-8", false);

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