added support to download and extract zip file.

core/src/main/java/com/jukusoft/updater/ui/UpdaterUI.java

@@ -19,14 +19,13 @@
 import com.jukusoft.updater.font.BitmapFontFactory;
 import com.jukusoft.updater.skin.SkinFactory;
 import com.jukusoft.updater.update.VersionInfo;
-import com.jukusoft.updater.utils.FileUtils;
-import com.jukusoft.updater.utils.GameTime;
-import com.jukusoft.updater.utils.PlatformUtils;
+import com.jukusoft.updater.utils.*;
 import javafx.application.Platform;
 
 import java.io.File;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
+import java.util.zip.ZipFile;
 
 /**
  * Created by Justin on 22.04.2017.
@@ -232,6 +231,9 @@ protected void startGame () {
 
             System.exit(1);
         }
+
+        //exit launcher after start game
+        System.exit(0);
     }
 
     protected void updateGame () {
@@ -243,9 +245,50 @@ protected void updateGame () {
 
         this.isUpdating = true;
 
+        //update progressbar
+        this.updateText = "Get ZIP url...";
+        this.filledBar.setValue(2);
+        this.filledBar.setText("2%");
+
         //get URL to zip file
         String zipPath = this.versionInfo.getNewestVersionZIPURL();
         System.out.println("path to ZIP file: " + zipPath);
+
+        //update progressbar
+        this.updateText = "Download ZIP file...";
+        this.filledBar.setValue(20);
+        this.filledBar.setText("20%");
+
+        //delete old update files, if neccessary
+        if (new File("./update.zip").exists()) {
+            new File("./update.zip").delete();
+        }
+
+        //download zip
+        try {
+            WebsiteUtils.downloadFile(zipPath, "./update.zip");
+        } catch (IOException e) {
+            e.printStackTrace();
+            isUpdating = false;
+
+            this.startButton.setVisible(true);
+
+            return;
+        }
+
+        //update progressbar
+        this.updateText = "Extract ZIP file...";
+        this.filledBar.setValue(50);
+        this.filledBar.setText("50%");
+
+        ZIPUtils.unZipIt("./update.zip", ".");
+
+        //update progressbar
+        this.updateText = "Done...";
+        this.filledBar.setValue(100);
+        this.filledBar.setText("100%");
+
+        this.startButton.setVisible(true);
     }
 
 }

core/src/main/java/com/jukusoft/updater/utils/WebsiteUtils.java

@@ -1,8 +1,7 @@
 package com.jukusoft.updater.utils;
 
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStreamReader;
+import java.io.*;
+import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLConnection;
@@ -27,4 +26,26 @@ public static String getWebsiteContent (String url) throws IOException {
         return a.toString();
     }
 
+    public static void downloadFile (String fileURL, String outputFile) throws IOException {
+        URL url = new URL(fileURL);
+        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+        connection.setRequestMethod("GET");
+        InputStream in = connection.getInputStream();
+        FileOutputStream out = new FileOutputStream(outputFile);
+
+        copy(in, out, 1024);
+
+        out.close();
+    }
+
+    public static void copy (InputStream input, OutputStream output, int bufferSize) throws IOException {
+        byte[] buf = new byte[bufferSize];
+        int n = input.read(buf);
+        while (n >= 0) {
+            output.write(buf, 0, n);
+            n = input.read(buf);
+        }
+        output.flush();
+    }
+
 }

core/src/main/java/com/jukusoft/updater/utils/ZIPUtils.java

@@ -0,0 +1,61 @@
+package com.jukusoft.updater.utils;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+/**
+ * Created by Justin on 23.04.2017.
+ */
+public class ZIPUtils {
+
+    public static boolean unZipIt(String zipFile, String outputFolder){
+
+        byte[] buffer = new byte[1024];
+
+        try {
+            //get the zip file content
+            ZipInputStream zis =
+                    new ZipInputStream(new FileInputStream(zipFile));
+            //get the zipped file list entry
+            ZipEntry ze = zis.getNextEntry();
+
+            while(ze!=null){
+
+                String fileName = ze.getName();
+                File newFile = new File(outputFolder + File.separator + fileName);
+
+                System.out.println("file unzip : "+ newFile.getAbsoluteFile());
+
+                //create all non exists folders
+                //else you will hit FileNotFoundException for compressed folder
+                new File(newFile.getParent()).mkdirs();
+
+                FileOutputStream fos = new FileOutputStream(newFile);
+
+                int len;
+                while ((len = zis.read(buffer)) > 0) {
+                    fos.write(buffer, 0, len);
+                }
+
+                fos.close();
+                ze = zis.getNextEntry();
+            }
+
+            zis.closeEntry();
+            zis.close();
+
+            System.out.println("Done");
+        } catch(IOException ex){
+            ex.printStackTrace();
+
+            return false;
+        }
+
+        return true;
+    }
+
+}