RefreshTokenRequest.java

/**
 * Copyright (c) 2010-2016 by the respective copyright holders.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.openhab.binding.netatmo.internal.authentication;

import static org.openhab.io.net.http.HttpUtil.executeUrl;

import java.io.ByteArrayInputStream;
import java.io.InputStream;

import org.apache.commons.lang.builder.ToStringBuilder;
import org.openhab.binding.netatmo.internal.messages.AbstractRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Gets a renewed refresh token from the Netatmo API to use in future
 * measurement requests.
 *
 * @author Andreas Brenk
 * @author Rob Nielsen
 * @author Ing. Peter Weiss
 * @since 1.4.0
 * @see <a
 *      href="http://dev.netatmo.com/doc/authentication/refreshtoken">refreshtoken</a>
 */
public class RefreshTokenRequest extends AbstractRequest {
    private static final String URL = "https://api.netatmo.net/oauth2/token";

    private static final String CONTENT = "grant_type=refresh_token&refresh_token=%s&client_id=%s&client_secret=%s&scope=";

    private static final String READ_STATION = "read_station";

    private static final String READ_CAMERA = "read_camera";

    private static final Logger logger = LoggerFactory.getLogger(RefreshTokenRequest.class);

    private final String clientId;

    private final String clientSecret;

    private final String refreshToken;

    private final boolean weather;

    private final boolean camera;

    public RefreshTokenRequest(final String clientId, final String clientSecret, final String refreshToken, boolean weather, boolean camera) {
        this.clientId = clientId;
        this.clientSecret = clientSecret;
        this.refreshToken = refreshToken;
        this.weather = weather;
        this.camera = camera;
    }

    @Override
    public RefreshTokenResponse execute() {
        final StringBuffer buf = new StringBuffer(CONTENT);
        if (weather) {
            buf.append(READ_STATION);
        }

        if (camera) {
            if (weather) {
                buf.append(" ");
            }
            buf.append(READ_CAMERA);
        }

        final String content = String.format(buf.toString(), this.refreshToken, this.clientId, this.clientSecret);

        String json = null;
        try {
            json = executeQuery(content);
            if (json == null) {
                return null;
            }

            final RefreshTokenResponse response = JSON.readValue(json, RefreshTokenResponse.class);

            return response;
        } catch (final Exception e) {
            throw newException("Could not refresh access token!", e, URL, content, json);
        }
    }

    @Override
    public String toString() {
        final ToStringBuilder builder = createToStringBuilder();
        builder.appendSuper(super.toString());
        builder.append("clientId", this.clientId);
        builder.append("clientSecret", this.clientSecret);
        builder.append("refreshToken", this.refreshToken);

        return builder.toString();
    }

    protected String executeQuery(final String content) throws Exception {
        final InputStream stream = new ByteArrayInputStream(content.getBytes(CHARSET));

        logger.debug("HTTP Post url='{}' content='{}'", URL, content);

        return executeUrl(HTTP_POST, URL, HTTP_HEADERS, stream, HTTP_CONTENT_TYPE, HTTP_REQUEST_TIMEOUT);
    }
}