com.madhu.oauth2.OAuth2Sample.java Source code

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Here is the source code for com.madhu.oauth2.OAuth2Sample.java

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package com.madhu.oauth2;

/*
 * Copyright (c) 2010 Google Inc.
 *
 * 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 com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.util.store.DataStoreFactory;
import com.google.api.client.util.store.FileDataStoreFactory;
import com.google.api.services.oauth2.Oauth2;
import com.google.api.services.oauth2.model.Tokeninfo;
import com.google.api.services.oauth2.model.Userinfoplus;

import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.List;

/**
 * Command-line sample for the Google OAuth2 API described at <a
 * href="http://code.google.com/apis/accounts/docs/OAuth2Login.html">Using OAuth 2.0 for Login
 * (Experimental)</a>.
 *
 * @author Yaniv Inbar
 */
public class OAuth2Sample {

    /**
     * Be sure to specify the name of your application. If the application name is {@code null} or
     * blank, the application will log a warning. Suggested format is "MyCompany-ProductName/1.0".
     */
    private static final String APPLICATION_NAME = "OAuth2";

    /** Directory to store user credentials. */
    private static final java.io.File DATA_STORE_DIR = new java.io.File(System.getProperty("user.home"),
            ".store/oauth2_sample");

    /**
     * Global instance of the {@link DataStoreFactory}. The best practice is to make it a single
     * globally shared instance across your application.
     */
    private static FileDataStoreFactory dataStoreFactory;

    /** Global instance of the HTTP transport. */
    private static HttpTransport httpTransport;

    /** Global instance of the JSON factory. */
    private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();

    /** OAuth 2.0 scopes. */
    private static final List<String> SCOPES = Arrays.asList("https://www.googleapis.com/auth/userinfo.profile",
            "https://www.googleapis.com/auth/userinfo.email");

    private static Oauth2 oauth2;
    private static GoogleClientSecrets clientSecrets;

    /** Authorizes the installed application to access user's protected data. */
    private static Credential authorize() throws Exception {
        // load client secrets
        clientSecrets = GoogleClientSecrets.load(JSON_FACTORY,
                new InputStreamReader(OAuth2Sample.class.getResourceAsStream("/client_secrets.json")));
        if (clientSecrets.getDetails().getClientId().startsWith("Enter")
                || clientSecrets.getDetails().getClientSecret().startsWith("Enter ")) {
            System.out.println("Enter Client ID and Secret from https://code.google.com/apis/console/ "
                    + "into oauth2-cmdline-sample/src/main/resources/client_secrets.json");
            System.exit(1);
        }
        // set up authorization code flow
        GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(httpTransport, JSON_FACTORY,
                clientSecrets, SCOPES).setDataStoreFactory(dataStoreFactory).build();
        // authorize
        return new AuthorizationCodeInstalledApp(flow, new LocalServerReceiver()).authorize("user");
    }

    public static void main(String[] args) {
        try {
            httpTransport = GoogleNetHttpTransport.newTrustedTransport();
            dataStoreFactory = new FileDataStoreFactory(DATA_STORE_DIR);
            // authorization
            Credential credential = authorize();
            // set up global Oauth2 instance
            oauth2 = new Oauth2.Builder(httpTransport, JSON_FACTORY, credential)
                    .setApplicationName(APPLICATION_NAME).build();
            // run commands
            tokenInfo(credential.getAccessToken());
            userInfo();
            // success!
            return;
        } catch (IOException e) {
            System.err.println(e.getMessage());
        } catch (Throwable t) {
            t.printStackTrace();
        }
        System.exit(1);
    }

    private static void tokenInfo(String accessToken) throws IOException {
        header("Validating a token");
        Tokeninfo tokeninfo = oauth2.tokeninfo().setAccessToken(accessToken).execute();
        System.out.println(tokeninfo.toPrettyString());
        if (!tokeninfo.getAudience().equals(clientSecrets.getDetails().getClientId())) {
            System.err.println("ERROR: audience does not match our client ID!");
        }
    }

    private static void userInfo() throws IOException {
        header("Obtaining User Profile Information");
        Userinfoplus userinfo = oauth2.userinfo().get().execute();
        System.out.println(userinfo.toPrettyString());
    }

    static void header(String name) {
        System.out.println();
        System.out.println("================== " + name + " ==================");
        System.out.println();
    }
}