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-rw-r--r--pdf-over-gui/src/main/java/at/asit/pdfover/gui/Unzipper.java80
1 files changed, 80 insertions, 0 deletions
diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/Unzipper.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/Unzipper.java
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+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/Unzipper.java
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+/*
+ * Copyright 2012 by A-SIT, Secure Information Technology Center Austria
+ *
+ * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
+ * the European Commission - subsequent versions of the EUPL (the "Licence");
+ * You may not use this work except in compliance with the Licence.
+ * You may obtain a copy of the Licence at:
+ * http://joinup.ec.europa.eu/software/page/eupl
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the Licence is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Licence for the specific language governing permissions and
+ * limitations under the Licence.
+ */
+package at.asit.pdfover.gui;
+
+// Imports
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URL;
+import java.util.Enumeration;
+import java.util.zip.GZIPInputStream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+import java.util.zip.ZipInputStream;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ *
+ */
+public class Unzipper {
+ /**
+ * SLF4J Logger instance
+ **/
+ private static final Logger log = LoggerFactory.getLogger(Unzipper.class);
+
+ /**
+ * Extracts Zip File input stream to target path
+ * @param is
+ * @param targetPath
+ * @throws IOException
+ */
+ public static void unzip(InputStream is, String targetPath) throws IOException {
+ ZipInputStream zis = new ZipInputStream(is);
+ ZipEntry entry;
+ // while there are entries I process them
+ while ((entry = zis.getNextEntry()) != null) {
+ log.debug("entry: " + entry.getName() + ", " //$NON-NLS-1$//$NON-NLS-2$
+ + entry.getSize());
+ // consume all the data from this entry
+
+ if (entry.isDirectory()) {
+ log.debug("Extracting directory: " + entry.getName()); //$NON-NLS-1$
+ // This is not robust, just for demonstration purposes.
+ File nDir =new File(targetPath + "/" + entry.getName()); //$NON-NLS-1$
+ if(!nDir.exists()) {
+ if(!nDir.mkdir()) {
+ throw new IOException("Failed to create dir: " + entry.getName()); //$NON-NLS-1$
+ }
+ }
+ continue;
+ }
+ byte[] buffer = new byte[1024];
+ int len;
+ BufferedOutputStream out = new BufferedOutputStream(
+ new FileOutputStream(targetPath + "/" + entry.getName())); //$NON-NLS-1$
+ while ((len = zis.read(buffer)) >= 0)
+ out.write(buffer, 0, len);
+
+ out.close();
+ }
+ }
+}