public static File convertRpmToZip(File file) throws Exception {
LOG.info("File: " + file.getAbsolutePath());
FileInputStream fis = new FileInputStream(file);
ReadableChannelWrapper in = new ReadableChannelWrapper(Channels.newChannel(fis));
InputStream uncompressed = new GZIPInputStream(fis);
in = new ReadableChannelWrapper(Channels.newChannel(uncompressed));
String rpmZipName = file.getName();
rpmZipName = StringUtils.replace(rpmZipName, ".", "-");
rpmZipName = rpmZipName + ".zip";
String rpmZipPath = FilenameUtils.getFullPath(file.getAbsolutePath());
File rpmZipOutput = new File(rpmZipPath + File.separator + rpmZipName);
LOG.info("Converting RPM: " + file.getName() + " to ZIP: " + rpmZipOutput.getName());
ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(rpmZipOutput));
String rpmName = file.getName();
rpmName = StringUtils.replace(rpmName, ".", "-");
CpioHeader header;
int total = 0;
do {
header = new CpioHeader();
total = header.read(in, total);
if (header.getFileSize() > 0) {
BoundedInputStream bis = new BoundedInputStream(uncompressed, header.getFileSize());
String relPath = FilenameUtils.separatorsToSystem(header.getName());
relPath = StringUtils.removeStart(relPath, ".");
relPath = StringUtils.removeStart(relPath, "/");
relPath = rpmName + File.separator + relPath;
relPath = StringUtils.replace(relPath, "\\", "/");
ZipEntry zipEntry = new ZipEntry(relPath);
zos.putNextEntry(zipEntry);
IOUtils.copy(bis, zos);
} else {
final int skip = header.getFileSize();
if (uncompressed.skip(skip) != skip) throw new RuntimeException("Skip failed.");
}
total += header.getFileSize();
} while (!header.isLast());
zos.flush();
zos.close();
return rpmZipOutput;
}
/**
* Scans a file and prints out useful information. This utility reads from standard input, and
* parses the binary contents of the RPM file.
*
* @throws Exception if an error occurs while reading the RPM file or it's contents
*/
public static void main(String[] args) throws Exception {
InputStream fios = new FileInputStream(args[0]);
ReadableChannelWrapper in = new ReadableChannelWrapper(Channels.newChannel(fios));
Format format = new Scanner().run(in);
System.out.println(format);
InputStream uncompressed = new GZIPInputStream(fios);
in = new ReadableChannelWrapper(Channels.newChannel(uncompressed));
CpioHeader header;
int total = 0;
do {
header = new CpioHeader();
total = header.read(in, total);
System.out.println(header);
final int skip = header.getFileSize();
if (uncompressed.skip(skip) != skip) throw new RuntimeException("Skip failed.");
total += header.getFileSize();
} while (!header.isLast());
}