com.kurento.demo.cpbrazil.youtube.Auth.java Source code

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Here is the source code for com.kurento.demo.cpbrazil.youtube.Auth.java

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/*
 * (C) Copyright 2014 Kurento (http://kurento.org/)
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser General Public License
 * (LGPL) version 2.1 which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl-2.1.html
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 */
package com.kurento.demo.cpbrazil.youtube;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.java6.auth.oauth2.FileCredentialStore;
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.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;

/**
 * Authorization for uploading videos to YouTube.
 * 
 * @author Ivan Gracia (igracia@gsyc.es)
 * @since 1.0.1
 * 
 */
class Auth {
    /**
     * Global instance of the HTTP transport.
     */
    public static final HttpTransport HTTP_TRANSPORT = new NetHttpTransport();

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

    /**
     * This is the directory that will be used under the user's home directory
     * where OAuth tokens will be stored.
     */
    private static final String CREDENTIALS_DIRECTORY = ".oauth-credentials";

    /**
     * Authorises the installed application to access user's protected data.
     * 
     * @param scopes
     *            list of scopes needed to run youtube upload.
     * @param credentialDatastore
     * @return
     * @throws IOException
     */
    public static Credential authorise(List<String> scopes, String credentialDatastore) throws IOException {

        // Set up file credential store.
        File file = new File(System.getProperty("user.home"), CREDENTIALS_DIRECTORY + "/" + credentialDatastore);
        return authorise(scopes, file);
    }

    public static Credential authorise(List<String> scopes, File credentialDataStore) throws IOException {

        FileCredentialStore credentialStore = new FileCredentialStore(credentialDataStore, JSON_FACTORY);

        GoogleClientSecrets clientSecrets = GoogleClientSecrets.load(JSON_FACTORY,
                Auth.class.getResourceAsStream("/client_secrets.json"));

        GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(HTTP_TRANSPORT, JSON_FACTORY,
                clientSecrets, scopes).setCredentialStore(credentialStore).build();

        // TODO change this to remove the port
        LocalServerReceiver localReceiver = new LocalServerReceiver.Builder().setPort(5555).build();

        // Authorize.
        return new AuthorizationCodeInstalledApp(flow, localReceiver).authorize("user");
    }

    public static File inputStreamToFile(InputStream inputStream) throws IOException {
        File file = new File("credentialStore");
        OutputStream output = new FileOutputStream(file);
        byte[] buf = new byte[1024];
        int len;
        while ((len = inputStream.read(buf)) > 0) {
            output.write(buf, 0, len);
        }
        output.close();
        inputStream.close();
        return file;
    }

}