From 6bd2c116db33972d971235120d9fa9107f2b4525 Mon Sep 17 00:00:00 2001
From: ulrich <undisclosed>
Date: Tue, 21 Mar 2017 11:17:48 +0000
Subject: [PATCH] Entpacken

---
 src/java/de/uhilger/filecms/api/FileMgr.java |   69 ++++++++++++++++++++++++++++++++++
 1 files changed, 69 insertions(+), 0 deletions(-)

diff --git a/src/java/de/uhilger/filecms/api/FileMgr.java b/src/java/de/uhilger/filecms/api/FileMgr.java
index c2e2f8e..82c5369 100644
--- a/src/java/de/uhilger/filecms/api/FileMgr.java
+++ b/src/java/de/uhilger/filecms/api/FileMgr.java
@@ -27,16 +27,21 @@
 import java.awt.Toolkit;
 import java.io.File;
 import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
 import java.io.FileReader;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.io.InputStream;
 import java.io.Reader;
 import java.security.Principal;
 import java.util.ArrayList;
+import java.util.Enumeration;
 import java.util.Iterator;
 import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
 import org.apache.commons.io.FileUtils;
 
 /**
@@ -359,6 +364,70 @@
 
     return "ok";
   }
+  
+  public String extractZipfile(String relPath, String filename) {
+    String result;
+    try {
+      File targetDir = getTargetDir(relPath);
+      File archive = new File(targetDir, filename);
+      if(extract(archive)) {
+        result = "ok";
+      } else {
+        result = "error while extracting";
+      }
+    } catch(Exception ex) {
+      result = ex.getLocalizedMessage();
+      logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
+    }
+    return result;
+  }
+  
+  /**
+	 * extract a given ZIP archive to the folder respective archive resides in
+	 * @param archive  the archive to extract
+	 * @throws Exception
+	 */
+	private boolean extract(File archive) throws Exception {
+		ZipFile zipfile = new ZipFile(archive);
+		Enumeration en = zipfile.entries();
+		while(en.hasMoreElements()) {
+			ZipEntry zipentry = (ZipEntry) en.nextElement();
+			unzip(zipfile, zipentry, archive.getParent());
+		}
+		zipfile.close();
+		return true;
+	}
+
+	/**
+	 * unzip a given entry of a given zip file to a given location
+	 * @param zipfile  the zip file to read an entry from
+	 * @param zipentry  the zip entry to read
+	 * @param destPath  the path to the destination location for the extracted content
+	 * @throws IOException
+	 */
+	private void unzip(ZipFile zipfile, ZipEntry zipentry, String destPath) throws IOException {
+		byte buf[] = new byte[1024];
+		InputStream is = zipfile.getInputStream(zipentry);
+		String outFileName = destPath + File.separator + zipentry.getName();
+		File file = new File(outFileName);
+		if(!zipentry.isDirectory()) {
+			file.getParentFile().mkdirs();
+			if(!file.exists())
+				file.createNewFile();
+			FileOutputStream fos = new FileOutputStream(file);
+			int i = is.read(buf, 0, 1024);
+			while(i > -1) {
+				fos.write(buf, 0, i);
+				i = is.read(buf, 0, 1024);
+			}
+			fos.close();
+			is.close();
+		} else {
+			file.mkdirs();
+		}
+	}
+
+  
 
   /* ---- Hilfsfunktionen ---- */
   

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