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| -rw-r--r-- | pdf-over-gui/src/main/java/at/asit/pdfover/gui/Unzipper.java | 80 |
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 new file mode 100644 index 00000000..af16c8a1 --- /dev/null +++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/Unzipper.java @@ -0,0 +1,80 @@ +/* + * 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(); + } + } +} |