displayclient.FileFetcher.java Source code

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Here is the source code for displayclient.FileFetcher.java

Source

/**
 * Copyright Alex Harrington, 2008.
 * 
 * This file is part of Xibo.
 * 
 * Xibo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * Xibo 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with Xibo. If not, see <http://www.gnu.org/licenses/>.
 * 
 */

package displayclient;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.logging.Logger;

import org.jdom2.DataConversionException;
import org.jdom2.Element;

public class FileFetcher extends Thread {

    protected String type;
    protected String path;
    protected int id;
    protected int size;
    protected String md5;
    protected DownloadManager parent;
    protected Double offset;
    protected Double chunk;
    protected final static Logger log = Logger.getLogger(DisplayClient.class.getName());

    public FileFetcher(DownloadManager parent, Element n) {
        this.parent = parent;
        this.type = n.getAttributeValue("type");
        this.path = n.getAttributeValue("path");
        try {
            this.id = n.getAttribute("id").getIntValue();
        } catch (DataConversionException e) {
        }
        if (n.getAttribute("size") != null) {
            try {
                this.size = n.getAttribute("size").getIntValue();
            } catch (DataConversionException e) {
            }
        }
        this.md5 = n.getAttributeValue("md5");
        offset = 0.0;
        chunk = 512000.0;
    }

    @Override
    public void run() {
        parent.threadCompleteNotify(this);
    }

    public String md5FromFile(File f) {
        String output = "";
        InputStream is;

        try {
            MessageDigest digest = MessageDigest.getInstance("MD5");
            is = new FileInputStream(f);
            byte[] buffer = new byte[8192];
            int read = 0;

            while ((read = is.read(buffer)) > 0) {
                digest.update(buffer, 0, read);
            }
            byte[] md5sum = digest.digest();
            BigInteger bigInt = new BigInteger(1, md5sum);
            output = bigInt.toString(16);
            is.close();
        } catch (FileNotFoundException e) {
            // The file didn't exist so return ""
        } catch (NoSuchAlgorithmException | IOException e) {
            // Unable to compute an MD5. If this is the case, I
            // suspect that's the least of our worries.
            e.printStackTrace();
        }

        return output;
    }

    public String md5FromString(String s) {
        String output = "";

        try {
            MessageDigest digest = MessageDigest.getInstance("MD5");
            digest.update(s.getBytes(), 0, s.length());
            byte[] md5sum = digest.digest();
            BigInteger bigInt = new BigInteger(1, md5sum);
            output = bigInt.toString(16);
        } catch (NoSuchAlgorithmException e) {
            // Unable to compute an MD5. If this is the case, I
            // suspect that's the least of our worries.
            e.printStackTrace();
        }

        return output;
    }

    public void downloadMedia(File f) {
    }

    public void downloadXLF(File f) {
    }

    public int getID() {
        return this.id;
    }

}