ch.ethz.dcg.pancho3.view.youtube.Query.java Source code

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Here is the source code for ch.ethz.dcg.pancho3.view.youtube.Query.java

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/* 
 * Copyright 2008-2013, ETH Zrich, Samuel Welten, Michael Kuhn, Tobias Langner,
 * Sandro Affentranger, Lukas Bossard, Michael Grob, Rahul Jain, 
 * Dominic Langenegger, Sonia Mayor Alonso, Roger Odermatt, Tobias Schlueter,
 * Yannick Stucki, Sebastian Wendland, Samuel Zehnder, Samuel Zihlmann,       
 * Samuel Zweifel
 *
 * This file is part of Jukefox.
 *
 * Jukefox is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software 
 * Foundation, either version 3 of the License, or any later version. Jukefox 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * Jukefox. If not, see <http://www.gnu.org/licenses/>.
 */
package ch.ethz.dcg.pancho3.view.youtube;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpRequestRetryHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;

import android.util.Log;

public class Query {

    private final static String TAG = Query.class.getSimpleName();
    private DefaultHttpClient httpClient;
    public static final int CONNECTION_TIMEOUT = 20000;
    public String artist;
    public String song;
    private static final String VIDEO_FEED = "http://gdata.youtube.com/feeds/mobile/videos";

    public Query(String artist, String song) {

        this.artist = artist;
        this.song = song;
        initializeHttpClient();
    }

    public Query(String artist) {
        this.artist = artist;
        this.song = "";
        initializeHttpClient();
    }

    private void initializeHttpClient() {
        // Initialize Http client
        HttpParams params = new BasicHttpParams();
        HttpConnectionParams.setConnectionTimeout(params, CONNECTION_TIMEOUT);
        HttpConnectionParams.setSoTimeout(params, CONNECTION_TIMEOUT);
        httpClient = new DefaultHttpClient(params);

        HttpRequestRetryHandler retryHandler = new DefaultHttpRequestRetryHandler(2, true);
        httpClient.setHttpRequestRetryHandler(retryHandler);
    }

    public String getQueryURL() throws UnsupportedEncodingException {
        return VIDEO_FEED + "?" + "q=" + URLEncoder.encode(artist, "UTF-8") + "+" + URLEncoder.encode(song, "UTF-8")
                + "+live&max-results=20&category=Music&v=2";
    }

    public String getVideosFromYouTubeServer() throws Exception {
        String urlStr = getQueryURL();
        Log.v(TAG, urlStr);
        InputStream is = null;
        StringBuilder contents = new StringBuilder();

        try {
            is = getVideosInputStreamFromUrl(urlStr);
            BufferedReader bufread = new BufferedReader(new InputStreamReader(is));
            try {
                String url = null;
                while ((url = bufread.readLine()) != null) {
                    contents.append(url);
                    contents.append(System.getProperty("url.separator"));
                }
            } finally {
                bufread.close();
            }
        } catch (Exception ex) {
            Log.w(TAG, ex);
        }

        return contents.toString();

    }

    public InputStream getVideosInputStreamFromUrl(String urlStr) throws Exception {
        //   String urlStr = getQueryURL();
        Log.v(TAG, urlStr);
        HttpGet httpGet = new HttpGet(urlStr);
        Log.v(TAG, "httpGet has been created");
        HttpResponse httpResp = httpClient.execute(httpGet);
        Log.v(TAG, "httpResp has been created");
        HttpEntity httpEntity = httpResp.getEntity();
        Log.v(TAG, "httpEntity has been created");
        InputStream is = httpEntity.getContent();
        Log.v(TAG, "InputStream has been created: " + is);
        return is;
    }

}