download Video - Java Network

Java examples for Network:URL Download

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Description

download Video

Demo Code


import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.MessageFormat;

public class Main{
    public static String downloadVideo(String url, String path,
            IProgressable downloadProgress) {
        InputStream input = null;
        OutputStream output = null;
        HttpURLConnection connection = null;
        try {//  w w  w.  j a v a  2 s. com
            connection = (HttpURLConnection) new URL(url).openConnection();
            connection.connect();

            // expect HTTP 200 OK, so we don't mistakenly save error report
            // instead of the file
            if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
                return MessageFormat.format(
                        "Server returned HTTP ({0}): {1}",
                        connection.getResponseCode(),
                        connection.getResponseMessage());
            }

            // this will be useful to display download percentage
            // might be -1: server did not report the length
            int fileLength = connection.getContentLength();

            // download the file
            input = connection.getInputStream();
            output = new FileOutputStream(path);

            byte data[] = new byte[4096];
            long total = 0;
            int count;
            while ((count = input.read(data)) != -1) {
                // allow canceling with back button
                /*
                if (isCancelled()) {
                   input.close();
                   return null;
                }
                 */
                total += count;
                // publishing the progress....
                if (fileLength > 0) // only if total length is known
                    downloadProgress.progress(total * 100.0 / fileLength);
                output.write(data, 0, count);
            }
        } catch (Exception e) {
            return e.toString();
        } finally {
            try {
                if (output != null)
                    output.close();
                if (input != null)
                    input.close();
            } catch (IOException ignored) {
            }

            if (connection != null)
                connection.disconnect();
        }
        return null;
    }
}

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