Example usage for org.apache.commons.compress.archivers.zip ZipArchiveInputStream getNextZipEntry

Introduction

In this page you can find the example usage for org.apache.commons.compress.archivers.zip ZipArchiveInputStream getNextZipEntry.

Prototype

public ZipArchiveEntry getNextZipEntry() throws IOException

Source Link

Usage

From source file:uk.nhs.cfh.dsp.srth.distribution.FileDownloader.java

public void getFileFromTRUDArchive(String trudArchiveName, String fileName, String outputURL) {

    logger.info("Now getting file... ");
    if (ftpClient.isConnected()) {
        logger.info("ftp client is connected... ");
        // now get file specified by inputURL
        try {/*from   w w  w  .j av a2s. c o  m*/
            ftpClient.setFileTransferMode(FTP.BINARY_FILE_TYPE);
            logger.info("Sending NOOP command... ");
            // send NOOP command to see if connection is still active
            if (ftpClient.sendNoOp()) {
                logger.info("ftpClient.getReplyString() = " + ftpClient.getReplyString());
                FTPFile[] files = ftpClient.listFiles(getPackPath());
                for (FTPFile file : files) {
                    logger.info("file.getName() = " + file.getName());
                    logger.info("file.getSize() = " + file.getSize());
                    if (file.getName().equals(trudArchiveName) && file.getSize() > 0) {
                        InputStream is = ftpClient.retrieveFileStream(getPackPath() + trudArchiveName);

                        if (is != null) {
                            ZipArchiveInputStream zipArchiveInputStream = new ZipArchiveInputStream(is);
                            ZipArchiveEntry zipArchiveEntry = zipArchiveInputStream.getNextZipEntry();
                            while (zipArchiveEntry != null) {
                                String zippedArchiveEntryName = zipArchiveEntry.getName();
                                logger.info("zippedArchiveEntryName = " + zippedArchiveEntryName);
                                logger.info("fileName = " + fileName);
                                if (zippedArchiveEntryName.equals(fileName)) {
                                    logger.info("Extracting: " + zippedArchiveEntryName);
                                    File outputLocation = new File(outputURL);
                                    boolean canWrite = outputLocation.exists();
                                    logger.info("canWrite = " + canWrite);
                                    if (!canWrite) {
                                        canWrite = outputLocation.mkdirs();
                                        logger.info("canWrite after mkdirs = " + canWrite);
                                    }

                                    if (canWrite && outputLocation.canWrite()) {
                                        logger.info("outputLocation.getPath() = " + outputLocation.getPath());
                                        File destinationFile = new File(outputLocation.getAbsolutePath(),
                                                zippedArchiveEntryName);
                                        OutputStream out = new FileOutputStream(destinationFile);
                                        IOUtils.copy(zipArchiveInputStream, out);
                                        out.close();

                                        if (zippedArchiveEntryName.indexOf(".zip") > -1) {
                                            // unpackZip file
                                            extractZipFileContents(destinationFile);
                                        }
                                    }
                                } else {
                                    logger.info("Resetting zipArchiveEntry");
                                    zipArchiveEntry = zipArchiveInputStream.getNextZipEntry();
                                    if (zipArchiveEntry != null) {
                                        logger.info("zipArchiveEntry.getName() = " + zipArchiveEntry.getName());
                                    }
                                }

                            }

                            zipArchiveInputStream.close();
                            is.close();
                        }
                        break;
                    }
                }

                // complete pending commands; needed after opening and closing streams
                ftpClient.completePendingCommand();
            } else {
                logger.warning("FTP connection might have timed out.");
                ftpClient.disconnect();
            }
        } catch (IOException e) {
            logger.warning("FTP connection might have timed out. " + ERR_MESSAGE + e.fillInStackTrace());
        }
    } else {
        logger.warning("No connection to TRUD is available. Ensure FTP connection is open");
    }
}