com.blitz.picasaclient.CredentialsProvider.java Source code

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Here is the source code for com.blitz.picasaclient.CredentialsProvider.java

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package com.blitz.picasaclient;
/*
 * Copyright (c) 2012 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.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.util.store.DataStoreFactory;
import com.google.api.client.util.store.FileDataStoreFactory;
import com.google.api.services.plus.PlusScopes;
import javafx.stage.Stage;

import java.io.IOException;
import java.io.InputStreamReader;
import java.security.GeneralSecurityException;
import java.util.Arrays;

/**
 * Utility class to provide credentials and cache them in a local file.
 */
public class CredentialsProvider {

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

    /**
     * Global instance of the {@link DataStoreFactory}. The best practice is to make it a single
     * globally shared instance across your application, but for this sample, it's only useful
     * for saving credentials across runs.
     */
    private static FileDataStoreFactory dataStoreFactory;

    /**
     * Authorizes the installed application to access user's protected data.
     * <p>
     * <p>If you plan to run on AppEngine or Compute Engine, consider instead
     * {@link GoogleCredential#getApplicationDefault()}, which will use the ambient credentials
     * for the project's service-account.
     */
    public static Credential authorize(HttpTransport httpTransport, JsonFactory jsonFactory, Stage stage)
            throws IOException, GeneralSecurityException {
        dataStoreFactory = new FileDataStoreFactory(DATA_STORE_DIR);
        // load client secrets
        GoogleClientSecrets clientSecrets = GoogleClientSecrets.load(jsonFactory,
                new InputStreamReader(CredentialsProvider.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://console.developers.google.com/project/_/apiui/"
                            + "credential into storage-cmdline-sample/src/main/resources/client_secrets.json");
            System.exit(1);
        }

        // set up authorization code flow
        GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(httpTransport, jsonFactory,
                clientSecrets,
                Arrays.asList("https://picasaweb.google.com/data/", PlusScopes.PLUS_ME, PlusScopes.USERINFO_EMAIL))
                        .setDataStoreFactory(dataStoreFactory).build();
        // authorize
        return new AuthorizationHelper(flow).authorize(clientSecrets.getDetails().getClientId(), stage);
    }
}