Youtube Fecther

Content.java

import java.util.ArrayList;
import java.util.List;

/**
 *
 * @author FALOOK
 */
 
public class Content {
    private String id;
    private List<Itag> itags;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public List<Itag> getItags() {
        return itags;
    }   

    public Content(String id) {
        this.id = id;
    }
    
    public void addItag(Itag itag){
        if(itags == null)
            itags = new ArrayList<>();
        itags.add(itag);
    }
    
    @Override
    public String toString() {
        return "Content{" + "id=" + id + ", itags=" + itags + '}';
    }
}

Fetcher.java

import java.net.URLDecoder;
import java.util.HashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import model.Content;
import model.Itag;
import utils.HTTPHelper;

/**
 *
 * @author FALOOK
 */
 
public class Fetcher {

    private static HTTPHelper http = new HTTPHelper();

    public static void fetchVid(String url) throws Exception {
        String info = getInfo(url);
        if (info != null) {
            String pattern = "adaptive_fmts=(.[^&]*?)&";
            Matcher streamMapMatcher = regexMatch(pattern, info);
            if (streamMapMatcher.find()) {
                String streamMap = URLDecoder.decode(streamMapMatcher.group(1), "UTF-8");
                System.out.println(streamMap);
                Content content = new Content(getId(url));
                for (String str : streamMap.split(",")) {
                    String itag = "", conUrl = "";
                    for (String str2 : str.split("&")) {
                        if (str2.startsWith("itag")) {
                            itag = str2.split("=")[1];
                        } else if (str2.startsWith("url")) {
                            conUrl = URLDecoder.decode(str2.split("=")[1], "UTF-8");
                        }
                    }
                    content.addItag(new Itag(itag, conUrl));
                }
            } else {
                throw new Exception("Cannot get video url");
            }

        }
    }

    public static void fetchList(String url) throws Exception {
        String info = http.sendGet(url);
        if (info != null) {
            String pattern = "data-video-id=\"(.[^&]*?)\"";
            Matcher streamMapMatcher = regexMatch(pattern, info);
            if (streamMapMatcher.find()) {
                do {
                    String streamMap = URLDecoder.decode(streamMapMatcher.group(1), "UTF-8");
                    fetchVid("http://www.youtube.com/watch?v=" + streamMap);
                }while (streamMapMatcher.find());
            } else {
                throw new Exception("Cannot get video list");
            }
        }
    }

    private static String getId(String url) {
        Matcher streamMap = regexMatch("v=([^\\&\\?\\/]+)", url);
        while (streamMap.find()) {
            return streamMap.group(1);
        }
        return null;
    }

    private static String getInfo(String url) throws Exception {
        String vidId = getId(url);
        if (vidId != null) {
            String infoUrl = "http://www.youtube.com/get_video_info?&video_id=" + vidId + "&asv=3&el=detailpage&hl=en_US";
            return http.sendGet(infoUrl);
        }
        return null;

    }

    private static Matcher regexMatch(String pattern, String text) {
        Pattern p = Pattern.compile(pattern);
        return p.matcher(text);
    }

    public static void main(String[] args) throws Exception {
        Fetcher.fetchVid("http://www.youtube.com/watch?v=Y0qJdShOL_s&list=RDHCZsi4-lePfDk&index=27");
    }
}

HTTPHelper.java

import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

/**
 *
 * @author FALOOK
 */
 
public class HTTPHelper{

    public String sendGet(String url) throws Exception {
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
        con.setRequestMethod("GET");
        int responseCode = con.getResponseCode();
        if (responseCode == 200) {
            BufferedReader in = new BufferedReader(
                    new InputStreamReader(con.getInputStream()));
            String inputLine;
            StringBuffer response = new StringBuffer();

            while ((inputLine = in.readLine()) != null) {
                response.append(inputLine);                
            }
            in.close();
            return response.toString();
        } else {
            throw new Exception("Cannot sending request url : " + url);
        }
    }
}

Itag.java

import java.util.HashMap;

/**
 *
 * @author FALOOK
 */
public class Itag {

    private String itag;
    private String format;
    private String resolutionClass; //240p 1080p
    private String flag; //3D
    private String url;

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getFlag() {
        return flag;
    }

    public void setFlag(String flag) {
        this.flag = flag;
    }

    public String getItag() {
        return itag;
    }

    public void setItag(String itag) {
        this.itag = itag;
    }

    public String getFormat() {
        return format;
    }

    public void setFormat(String format) {
        this.format = format;
    }

    public String getResolutionClass() {
        return resolutionClass;
    }

    public void setResolutionClass(String resolutionClass) {
        this.resolutionClass = resolutionClass;
    }

    public Itag(String itag, String url) {
        switch (itag) {
            case "5":
                format = "FLV";
                resolutionClass = "240p";
                flag = "";
                break;
            case "17":
                format = "3GP";
                resolutionClass = "144p";
                flag = "";
                break;
            case "18":
                format = "MP4";
                resolutionClass = "360p";
                flag = "";
                break;
            case "22":
                format = "MP4";
                resolutionClass = "720p";
                flag = "";
                break;
            case "34":
                format = "FLV";
                resolutionClass = "360p";
                flag = "";
                break;
            case "35":
                format = "FLV";
                resolutionClass = "480p";
                flag = "";
                break;
            case "36":
                format = "3GP";
                resolutionClass = "240p";
                flag = "";
                break;
            case "37":
                format = "MP4";
                resolutionClass = "1080p";
                flag = "";
                break;
            case "38":
                format = "MP4";
                resolutionClass = "1080p";
                flag = "";
                break;
            case "43":
                format = "WEB";
                resolutionClass = "360p";
                flag = "";
                break;
            case "44":
                format = "WEB";
                resolutionClass = "480p";
                flag = "";
                break;
            case "45":
                format = "WEB";
                resolutionClass = "720p";
                flag = "";
                break;
            case "46":
                format = "WEB";
                resolutionClass = "1080p";
                flag = "";
                break;
            case "82":
                format = "MP4";
                resolutionClass = "360p";
                flag = "3D";
                break;
            case "83":
                format = "MP4";
                resolutionClass = "480p";
                flag = "3D";
                break;
            case "84":
                format = "MP4";
                resolutionClass = "720p";
                flag = "3D";
                break;
            case "85":
                format = "MP4";
                resolutionClass = "1080p";
                flag = "3D";
                break;
            case "100":
                format = "WEB";
                resolutionClass = "360p";
                flag = "3D";
                break;
            case "101":
                format = "WEB";
                resolutionClass = "480p";
                flag = "3D";
                break;
            case "102":
                format = "WEB";
                resolutionClass = "720p";
                flag = "3D";
                break;
            case "133":
                format = "MP4";
                resolutionClass = "240p";
                flag = "VO";
                break;
            case "134":
                format = "MP4";
                resolutionClass = "360p";
                flag = "VO";
                break;
            case "135":
                format = "MP4";
                resolutionClass = "480p";
                flag = "VO";
                break;
            case "136":
                format = "MP4";
                resolutionClass = "720p";
                flag = "VO";
                break;
            case "137":
                format = "MP4";
                resolutionClass = "1080p";
                flag = "VO";
                break;
            case "138":
                format = "MP4";
                resolutionClass = "2160p";
                flag = "VO";
                break;
            case "139":
                format = "MP4";
                resolutionClass = "Low bitrate";
                flag = "AO";
                break;
            case "140":
                format = "MP4";
                resolutionClass = "Med bitrate";
                flag = "AO";
                break;
            case "141":
                format = "MP4";
                resolutionClass = "Hi bitrate";
                flag = "AO";
                break;
            case "160":
                format = "MP4";
                resolutionClass = "144p";
                flag = "VO";
                break;
            case "171":
                format = "WEB";
                resolutionClass = "Med bitrate";
                flag = "AO";
                break;
            case "172":
                format = "WEB";
                resolutionClass = "Hi bitrate";
                flag = "AO";
                break;
            case "242":
                format = "WEB";
                resolutionClass = "240p";
                flag = "VOX";
                break;
            case "243":
                format = "WEB";
                resolutionClass = "360p";
                flag = "VOX";
                break;
            case "244":
                format = "WEB";
                resolutionClass = "480p";
                flag = "VOX";
                break;
            case "245":
                format = "WEB";
                resolutionClass = "480p";
                flag = "VOX";
                break;
            case "246":
                format = "WEB";
                resolutionClass = "480p";
                flag = "VOX";
                break;
            case "247":
                format = "WEB";
                resolutionClass = "720p";
                flag = "VOX";
                break;
            case "248":
                format = "WEB";
                resolutionClass = "1080p";
                flag = "VOX";
                break;
            case "264":
                format = "MP4";
                resolutionClass = "1080p";
                flag = "VO";
                break;
            case "271":
                format = "WEBM";
                resolutionClass = "1440p";
                flag = "VO";
                break;
            case "272":
                format = "WEBM";
                resolutionClass = "2160p";
                flag = "VO";
                break;                
        }
        this.url = url;
        this.itag = itag;
    }

    @Override
    public String toString() {
        return "Itag{" + "itag=" + itag + ", format=" + format + ", resolutionClass=" + resolutionClass + ", flag=" + flag + ", url=" + url + '}';
    }
}