org.awesomeagile.webapp.security.google.GoogleConfigurableOAuth2Template.java Source code

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Here is the source code for org.awesomeagile.webapp.security.google.GoogleConfigurableOAuth2Template.java

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package org.awesomeagile.webapp.security.google;

/*
 * ================================================================================================
 * Awesome Agile
 * %%
 * Copyright (C) 2015 Mark Warren, Phillip Heller, Matt Kubej, Linghong Chen, Stanislav Belov, Qanit Al
 * Copyright (C) 2011 Gabriel Axel
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ------------------------------------------------------------------------------------------------
 */

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.social.oauth2.AccessGrant;
import org.springframework.social.oauth2.OAuth2Template;
import org.springframework.util.MultiValueMap;

import java.util.Map;

/**
 * @author sbelov@google.com (Stan Belov)
 */
public class GoogleConfigurableOAuth2Template extends OAuth2Template {

    private static final String AUTHORIZE_URL = "oauth2/auth";
    private static final String TOKEN_URL = "oauth2/token";
    private static final String SEPARATOR = "/";

    public GoogleConfigurableOAuth2Template(String clientId, String clientSecret, String baseUrl) {
        super(clientId, clientSecret, end(baseUrl, AUTHORIZE_URL), end(baseUrl, TOKEN_URL));
        setUseParametersForClientAuthentication(true);
    }

    @Override
    @SuppressWarnings({ "unchecked", "rawtypes" })
    protected AccessGrant postForAccessGrant(String accessTokenUrl, MultiValueMap<String, String> parameters) {
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
        HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<MultiValueMap<String, String>>(
                parameters, headers);
        ResponseEntity<Map> responseEntity = getRestTemplate().exchange(accessTokenUrl, HttpMethod.POST,
                requestEntity, Map.class);
        Map<String, Object> responseMap = responseEntity.getBody();
        return extractAccessGrant(responseMap);
    }

    private AccessGrant extractAccessGrant(Map<String, Object> result) {
        String accessToken = (String) result.get("access_token");
        String scope = (String) result.get("scope");
        String refreshToken = (String) result.get("refresh_token");

        // result.get("expires_in") may be an Integer, so cast it to Number first.
        Number expiresInNumber = (Number) result.get("expires_in");
        Long expiresIn = (expiresInNumber == null) ? null : expiresInNumber.longValue();
        return createAccessGrant(accessToken, scope, refreshToken, expiresIn, result);
    }

    private static String end(String base, String path) {
        if (!base.endsWith(SEPARATOR)) {
            base += SEPARATOR;
        }
        return base + path;
    }
}