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The best OAuth library out there

There is a newer version: 1.3.7

package org.scribe.builder.api;

import org.scribe.extractors.*;
import org.scribe.model.*;
import org.scribe.utils.*;

public class Foursquare2Api extends DefaultApi20
{
  private static final String AUTHORIZATION_URL = "https://foursquare.com/oauth2/authenticate?client_id=%s&response_type=code&redirect_uri=%s";

  @Override
  public String getAccessTokenEndpoint()
  {
    return "https://foursquare.com/oauth2/access_token?grant_type=authorization_code";
  }

  @Override
  public String getAuthorizationUrl(OAuthConfig config)
  {
    Preconditions.checkValidUrl(config.getCallback(), "Must provide a valid url as callback. Foursquare2 does not support OOB");
    return String.format(AUTHORIZATION_URL, config.getApiKey(), OAuthEncoder.encode(config.getCallback()));
  }

  @Override
  public AccessTokenExtractor getAccessTokenExtractor()
  {
    return new JsonTokenExtractor();
  }
}