CODEWITHSUNDEEP
javafiledownload
BullyWiiPlaza
BullyWiiPlaza

Reputation: 19185

Downloaded File Has 0 Bytes

I'm trying to download a .mp3 music file from this URL to the project root directory but the downloaded file always has 0 bytes in size (it is blank). The download also immediately stops.

I'm using the following code:

import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

import org.apache.commons.io.FileUtils;

public class MusicDownloader
{
    public static void main(String[] arguments) throws MalformedURLException, IOException
    {
        download("https://www.youtube.com/audiolibrary_download?vid=d0a68933f592c297", "Ponies and Balloons");
    }

    public static void download(String url, String fileName) throws MalformedURLException, IOException
    {
        FileUtils.copyURLToFile(new URL(url), new File(fileName + ".mp3"));
    }
}

In a browser, downloading the file manually works flawlessly. A download link from another website e.g. this one had no problems to be processed by the code. What could be the problem here?

Sending a valid user-agent String doesn't work either.

Upvotes: 3

Views: 3527

Answers (2)

AnkeyNigam
AnkeyNigam

Reputation: 2820

The problem is actually with your URL https://www.youtube.com/audiolibrary_download?vid=d0a68933f592c297. It is actually issuing a redirect as Resource Temp Moved - 301 status code. So you need to pick its new URL. I tried using it HttpURLConnection to see that new redirected url is https://youtube-audio-library.storage.googleapis.com/d0a68933f592c297. You can use the below code :-

String urlString = "https://www.youtube.com/audiolibrary_download?vid=d0a68933f592c297";
        URL url = new URL(urlString);
        HttpURLConnection huc = (HttpURLConnection)url.openConnection();
        int statusCode = huc.getResponseCode(); //get response code
        if (statusCode == HttpURLConnection.HTTP_MOVED_TEMP
                || statusCode == HttpURLConnection.HTTP_MOVED_PERM){ // if file is moved, then pick new URL
            urlString = huc.getHeaderField("Location");
            url = new URL(urlString);
            huc = (HttpURLConnection)url.openConnection();
        }
        System.out.println(urlString);  
        InputStream is = huc.getInputStream();
        BufferedInputStream bis = new BufferedInputStream(is);
        FileOutputStream fos = new FileOutputStream("test.mp3");
        int i = 0;
        while ((i = bis.read()) != -1)
            fos.write(i);

The same effect you can check is available in FileUtils or not. I am sure, it should be . Cheers :)

Upvotes: 4

Huang Chen
Huang Chen

Reputation: 1203

Because it is illegal and against Youtube Terms of Service

Youtube specifically blocks most generic ways of downloading mp3 off their site. A simple 10ish lines of code won't work or piracy would've been bigger than it already is.

If they catch you, you WILL be blocked

Upvotes: -3

Related Questions