monitor execution of update installer for errors

java/net/i2p/router/ZipUpdateProcess.java

@@ -1,8 +1,14 @@
 package net.i2p.router;
 
 import java.io.*;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
 import java.util.Map;
 import java.util.function.*;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
 import net.i2p.I2PAppContext;
 import net.i2p.router.*;
 import net.i2p.util.Log;
@@ -79,4 +85,41 @@ public class ZipUpdateProcess implements Runnable {
       _log.error("Error running updater, update may fail." + ioe);
     }
   }
+
+  private static void unzip(String zipFilePath, String destDir) {
+    File dir = new File(destDir);
+    // create output directory if it doesn't exist
+    if (!dir.exists())
+      dir.mkdirs();
+    FileInputStream fis;
+    // buffer for read and write data to file
+    byte[] buffer = new byte[1024];
+    try {
+      fis = new FileInputStream(zipFilePath);
+      ZipInputStream zis = new ZipInputStream(fis);
+      ZipEntry ze = zis.getNextEntry();
+      while (ze != null) {
+        String fileName = ze.getName();
+        File newFile = new File(destDir + File.separator + fileName);
+        System.out.println("Unzipping to " + newFile.getAbsolutePath());
+        // create directories for sub directories in zip
+        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();
+        // close this ZipEntry
+        zis.closeEntry();
+        ze = zis.getNextEntry();
+      }
+      // close last ZipEntry
+      zis.closeEntry();
+      zis.close();
+      fis.close();
+    } catch (IOException e) {
+      e.printStackTrace();
+    }
+  }
 }