PluginUpdater.java

package us.plasmanetwork.Statistics;


import org.bukkit.Bukkit;
import org.bukkit.plugin.PluginManager;

import java.io.*;
import java.net.MalformedURLException;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.net.URLConnection;


public class PluginUpdater {
    private static Main plugin;

    private static String link = ("http://plasmanetwork.us/repo/statistics-plugin/statistics-plugin.txt");
    private static String jarLink = ("http://plasmanetwork.us/repo/statistics-plugin/Statistics.jar");

    public static void downloadFile(String location, String downloadLink, String name, String format) {
        try {
            java.net.URL url = new URL(downloadLink);
            URLConnection connection = url.openConnection();
            connection.connect();
            InputStream in = connection.getInputStream();
            FileOutputStream out = new FileOutputStream(new File(location + File.separator + name + format));
            byte[] b = new byte[128];
            for (int len = in.read(b); len != -1; len = in.read(b)) {
                out.write(b, 0, len);
            }
            in.close();
            out.flush();
            out.close();
        } catch (MalformedURLException ex) {
            Main.logError("Could not connect to server to check for update. MalformedURLException.");
        } catch (SocketTimeoutException ex) {
            Main.logError("Could not connect to server to check for update. SocketTimeoutException.");
        } catch (IOException ex) {
            Main.logError("Error with checking for update. IOException.");
        }
        return;
    }

    public static void update() {
        readTxt();
        if (!Main.latestVersion.equalsIgnoreCase(Main.currentVersion)) {
            Main.log("Update required!");
            Main.log("Attempting to update!");
            downloadFile("plugins" + File.separator, jarLink, Main.pluginName, ".jar");
            Main.log("Downloaded " + Main.pluginName + ".jar");
            Main.log("New version: " + Main.latestVersion);
            Main.log("-------------ATTENTION-------------");
            Main.log("Must reload/restart to take effect.");
            Main.log("Plugin is disabled due to new version.");
            Main.log("-------------ATTENTION-------------");
            Main.needsRestart = true;
        } else {
            Main.logInfo("Plugin is up to date.");
        }
    }

    public static void readTxt() {
        try {
            URL news = new URL(link);
            BufferedReader in = new BufferedReader(new InputStreamReader(news.openStream()));
            String inputLine;
            while ((inputLine = in.readLine()) != null) {
                Main.latestVersion = inputLine;
                Main.logInfo("Found latest version: " + Main.latestVersion);
            }
            in.close();
            return;
        } catch (MalformedURLException ex) {
            Main.logError("Eror reading version text/connecting to server. MalformedURLException.");
        } catch (SocketTimeoutException ex) {
            Main.logError("Error reading version text/connecting to server. SocketTimeoutException.");
        } catch (IOException ex) {
            Main.logError("Error with reading version text. IOException.");
        } catch (Exception ex) {
            Main.logError("There was an unknown error reading the version-text. Exception.");
        }
        Main.logInfo("Could not set version..");
    }
}