src/mining/OAuthRequester.java


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package mining;

import java.io.IOException;
import java.net.URLConnection;
import oauth.signpost.OAuthConsumer;
import oauth.signpost.basic.DefaultOAuthConsumer;
import oauth.signpost.exception.OAuthException;
import org.json.JSONObject;

/**
 * An API requester that uses OAuth to sign its requests.
 *
 * @author Peter Wu
 */
public class OAuthRequester extends AbstractRequester {

    /**
     * Instance that signs signs HTTP requests with an OAuth token and secret.
     */
    private final OAuthConsumer consumer;

    public OAuthRequester(String consumerKey, String consumerSecret) {
        // create a new application-specific OAuth consumer
        consumer = new DefaultOAuthConsumer(consumerKey, consumerSecret);
        // TODO: access tokens?
    }

    @Override
    protected void preconnect(URLConnection conn) throws IOException {
        try {
            consumer.sign(conn);
        } catch (OAuthException ex) {
            throw new IOException(ex);
        }
    }

    @Override
    public boolean isValid() throws IOException {
        // NOTE: this actually contributes to the ratelimit (12/minute)
        // TODO: find alternative that does not hit the ratelimit
        JSONObject obj = getJSONRelax("1/application/rate_limit_status");
        return !obj.has("errors");
    }
}