001/*
002 * (C) Copyright 2015-2016 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *      Nelson Silva
018 */
019package org.nuxeo.ecm.liveconnect.google.drive;
020
021import java.io.IOException;
022
023import org.nuxeo.ecm.liveconnect.core.AbstractLiveConnectOAuth2ServiceProvider;
024
025import com.google.api.client.http.GenericUrl;
026import com.google.api.client.http.HttpRequestFactory;
027import com.google.api.client.http.HttpResponse;
028import com.google.api.client.json.GenericJson;
029import com.google.api.client.json.JsonObjectParser;
030
031/**
032 * @since 7.3
033 */
034public class GoogleOAuth2ServiceProvider extends AbstractLiveConnectOAuth2ServiceProvider {
035
036    private static final String TOKEN_INFO_URL = "https://www.googleapis.com/oauth2/v1/tokeninfo";
037
038    private static final HttpRequestFactory requestFactory =
039            HTTP_TRANSPORT.createRequestFactory(request -> request.setParser(new JsonObjectParser(JSON_FACTORY)));
040
041    @Override
042    protected String getUserEmail(String accessToken) throws IOException {
043        GenericUrl url = new GenericUrl(TOKEN_INFO_URL);
044        url.set("access_token", accessToken);
045
046        HttpResponse response = requestFactory.buildGetRequest(url).execute();
047        GenericJson json = response.parseAs(GenericJson.class);
048        return (String) json.get("email");
049    }
050
051}