/**
* Adds a single file into the ZipOutputStream with specified entry name.
*
* @throws IOException
*/
private void addFileToZip(ZipOutputStream zipOut, ReshakaUploadedFile file, String name)
throws IOException {
if (log.isTraceEnabled()) {
log.trace(">> addFileToZip(): " + file);
}
ZipEntry entry = new ZipEntry(name);
zipOut.putNextEntry(entry);
try (InputStream in = file.getInputstream()) {
FileUtils.copyStream(file.getInputstream(), zipOut);
zipOut.closeEntry();
}
if (log.isTraceEnabled()) {
log.trace("<< addFileToZip()");
}
}
private Attachment prepareAttachment(User user, List<ReshakaUploadedFile> files, String tags) {
if (files.isEmpty()) {
if (log.isDebugEnabled()) {
log.debug("prepareAttachment() : List of files is empty! Nothing to compress.");
}
return null;
}
if (files.size() == 1) {
if (log.isTraceEnabled()) {
log.trace(
"prepareAttachment() : Single file is being uploaded. Delegating to uploadFile()");
}
try {
return prepareAttachment(
files.get(0).getFileName(),
files.get(0).getContentType(),
user,
files.get(0).getContents(),
tags);
} catch (IOException ex) {
if (log.isTraceEnabled()) {
log.trace("prepareAttachment() : I/O exception" + ex);
}
return null;
}
}
try {
// create zip file
log.trace("prepareAttachment(): Creating zip-file");
File root = new File(DEFAULT_UPLOAD_DIRECTORY, user.getLogin());
root.mkdirs();
File file = File.createTempFile("upload_", ".zip", root);
try (ZipOutputStream zos = new ZipOutputStream(file)) {
zos.setEncoding("utf-8");
zos.setMethod(ZipOutputStream.DEFLATED);
zos.setLevel(Deflater.BEST_COMPRESSION);
for (ReshakaUploadedFile uf : files) {
addFileToZip(zos, uf, uf.getFileName());
}
}
if (log.isDebugEnabled()) {
log.debug("prepareAttachment(): Files are saved at " + file);
}
if (file.length() > MAX_ZIP_SIZE) {
file.delete();
throw new IOException("File too large.");
}
// Create attachment
Attachment att = new Attachment();
att.setName(file.getName());
att.setMimeType("application/zip");
att.setSize(file.length());
att.setMD5(FileUtils.getMD5(file));
att.setFileName(user.getLogin() + "/" + file.getName());
if (log.isTraceEnabled()) {
log.trace("<< prepareAttachment()");
}
return att;
} catch (IOException ex) {
log.error("prepareAttachment(): Failed to upload files. ", ex);
return null;
}
}