Thread: Any good auto cache downloaders?

I'll post mine here when I get out of class in a few hours.

Are you zipping the cache folder itself or the files inside? You should be zipping the files inside.

Originally Posted by fortexscape

Hey fam are you out of class yet?

Thanks for reminding me

Code:

import java.net.URL;
import java.net.URLConnection;
import java.util.zip.*;
import java.io.*;

import javax.swing.JOptionPane;
import javax.swing.UIManager;

public class CacheDownloader implements Runnable {
	
        public static final String SERVER_NAME = "CHANGE TO THE NAME OF YOUR SERVER";
	public static final String ZIP_URL = "CHANGE TO LINK TO YOUR ZIPPED CACHE";
	public static final String VERSION_URL = "CHANGE TO LINK TO TEXT FILE ON YOUR WEBSITE CONTAINING THE CACHE VERSION FOR EASY UPDATING";
	public static final String VERSION_FILE = System.getProperty("user.home") + File.separator + SERVER_NAME + File.separator + "version.dat";
	
	private CacheDownloader.GUI g;
	
	@SuppressWarnings("resource")
	public double getCurrentVersion() {
		try {
			File versionDir = new File(VERSION_FILE);
			if(!versionDir.exists()) {
				versionDir.createNewFile();
				BufferedWriter br = new BufferedWriter(new FileWriter(versionDir));
				br.write("0.1");
			}
			BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(VERSION_FILE)));
			return Double.parseDouble(br.readLine());
		} catch (Exception e) {
			return 0.1;
		}
	}
	
	public double getNewestVersion() {
		try {
			URL tmp = new URL(VERSION_URL);
			BufferedReader br = new BufferedReader(new InputStreamReader(tmp.openStream()));
			return Double.parseDouble(br.readLine());
		} catch (Exception e) {
			handleException(e);
			return -1;
		}
	}
	
	private void handleException(Exception e) {
		StringBuffer strBuff = new StringBuffer();
		strBuff.append("Please Screenshot this message, and send it to an admin!\r\n\r\n");
		strBuff.append(e.getClass().getName() + " \"" + e.getMessage() + "\"\r\n");
		
		for(StackTraceElement s : e.getStackTrace())
			strBuff.append(s.toString() + "\r\n");
		
		alert("Exception [" + e.getClass().getSimpleName() + "]",strBuff.toString(),true);
	}
	
	private void alert(String msg) {
		alert("Message", msg, false);
	}
	
	private void alert(String title,String msg,boolean error) {
		JOptionPane.showMessageDialog(null, msg, title, (error ? JOptionPane.ERROR_MESSAGE : JOptionPane.PLAIN_MESSAGE));
	}
	
	@Override
	public void run() {
		try {
			double newest = getNewestVersion();
			
			if (newest > this.getCurrentVersion()) {
				int n = JOptionPane.showConfirmDialog(null, "You are currently on version " + getCurrentVersion() + " of the client\r\n" +
				    "The newest version is " + newest + " would you like to update?", "Update found!", JOptionPane.YES_NO_OPTION);
				
				if(n == 0) {
					g = new CacheDownloader.GUI();
					g.setLocationRelativeTo(null);
					g.setVisible(true);
					updateClient();
					@SuppressWarnings("resource")
					OutputStream out = new FileOutputStream(VERSION_FILE);
					out.write(String.valueOf(newest).getBytes());
					g.setVisible(false);
				} else
					alert("Please be aware that the client may not be able to connect!");
			}
		} catch(Exception e) {
			handleException(e);
		}
	}
	
	private void updateClient() {
		File clientZip = downloadClient();
		
		if(clientZip != null)
			unZip(clientZip);
	}
	
	private void unZip(File clientZip) {
		try {
			unZipFile(clientZip, new File(signlink.findcachedir()));
			clientZip.delete();
		} catch (IOException e) {
			handleException(e);
		}
	}
	
	private void unZipFile(File zipFile,File outFile) throws IOException {
		System.out.println(zipFile.getAbsolutePath());
		System.out.println(outFile.getAbsolutePath());
		g.setStatus("Unzipping: \"" + zipFile.getName() + "\"");
		g.setPercent(0);
		ZipInputStream zin = new ZipInputStream(new BufferedInputStream(new FileInputStream(zipFile)));
		ZipEntry e;
		long max = 0;
		long curr = 0;
		while((e = zin.getNextEntry()) != null)
			max += e.getSize();
		zin.close();
		ZipInputStream in = new ZipInputStream(new BufferedInputStream(new FileInputStream(zipFile)));
		while((e = in.getNextEntry()) != null){
			if(e.isDirectory())
				new File(outFile,e.getName()).mkdirs();
			else{
				FileOutputStream out = new FileOutputStream(new File(outFile,e.getName()));
				byte[] b = new byte[1024];
				int len;
				while((len = in.read(b,0,b.length)) > -1){
					curr += len;
						out.write(b, 0, len);
						//setUnzipPercent((int)((curr * 100) / max));
						g.setPercent((int)((curr * 100) / max));
				}
				out.flush();
				out.close();
			}
		}
	}

	private File downloadClient() {
		g.setStatus("Downloading...");
		File ret = new File(signlink.findcachedir() + SERVER_NAME + ".zip");
		
		try {
			OutputStream out = new FileOutputStream(ret);
			URLConnection conn = new URL(ZIP_URL).openConnection();
			InputStream in = conn.getInputStream();
			long max = conn.getContentLength();
			long curr = 0;
			byte[] b = new byte[1024];
			int len;
			
			while((len = in.read(b, 0, b.length)) > -1) {
				out.write(b,0,len);
				curr += len;
				g.setPercent((int)((curr * 100) / max));
			}
			
			out.flush();
			out.close();
			in.close();
			return ret;
		} catch(Exception e) {
			handleException(e);
			ret.delete();
			return null;
		}
	}

	public static void main(String[] args) {
		CacheDownloader a = new CacheDownloader();
		a.run();
	}
	
	public class GUI extends javax.swing.JFrame {
		private static final long serialVersionUID = 1L;

		/** Creates new form GUI */
	    public GUI() {
	    	try {
	    		UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
	        } catch(Exception ignored) {
	    		
	    	}
	    	
	        initComponents();
	    }

	    /** This method is called from within the constructor to
	     * initialize the form.
	     * WARNING: Do NOT modify this code. The content of this method is
	     * always regenerated by the Form Editor.
	     */
	    private void initComponents() {
	        jProgressBar1 = new javax.swing.JProgressBar();
	        jLabel1 = new javax.swing.JLabel();
	        jLabel2 = new javax.swing.JLabel();
	        jLabel3 = new javax.swing.JLabel();

	        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
	        setTitle("Auto-Updater");
	        
	        addWindowListener(new java.awt.event.WindowAdapter() {
	            public void windowClosing(java.awt.event.WindowEvent evt) {
	                formWindowClosing(evt);
	            }
	        });

	        jLabel1.setText("Status:");

	        jLabel2.setText("N/A");

	        jLabel3.setText("0%");

	        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
	        getContentPane().setLayout(layout);
	        layout.setHorizontalGroup(
	            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
	            .addGroup(layout.createSequentialGroup()
	                .addContainerGap()
	                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
	                    .addGroup(layout.createSequentialGroup()
	                        .addComponent(jLabel1)
	                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
	                        .addComponent(jLabel2)
	                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 304, Short.MAX_VALUE)
	                        .addComponent(jLabel3))
	                    .addComponent(jProgressBar1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 380, Short.MAX_VALUE))
	                .addContainerGap())
	        );
	        layout.setVerticalGroup(
	            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
	            .addGroup(layout.createSequentialGroup()
	                .addContainerGap()
	                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
	                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
	                        .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
	                        .addComponent(jLabel3))
	                    .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
	                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
	                .addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE)
	                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
	        );

	        pack();
	    }

	    private void formWindowClosing(java.awt.event.WindowEvent evt) { //GEN-FIRST:event_formWindowClosing

	    }

	    private int percent = 0;

	    public void setStatus(String s) {
	        jLabel2.setText(s);
	    }

	    public String getStatus() {
	        return jLabel2.getText();
	    }

	    public void setPercent(int amount) {
	        percent = amount;
	        jLabel3.setText(amount + "%");
	        jProgressBar1.setValue(amount);
	    }

	    public int getPercent() {
	        return percent;
	    }

	    private javax.swing.JLabel jLabel1;
	    private javax.swing.JLabel jLabel2;
	    private javax.swing.JLabel jLabel3;
	    private javax.swing.JProgressBar jProgressBar1;
	}
}

Originally Posted by fortexscape

In case i cant set this up can you help me out on skype fam?

Im getting this error after everything has been set up.

Lol, you need to call run();

Also, make sure you're calling it directly under startUp(); in client.java

Originally Posted by fortexscape

Like this? new CacheDownloader(this).run(); if so its still giving me callback error.

No, remove 'this'.

You should really learn Java before starting a server