/**
* Creates an input stream to read the file content from. Is only called if {@link #doGetType}
* returns {@link FileType#FILE}. The input stream returned by this method is guaranteed to be
* closed before this method is called again.
*/
@Override
protected InputStream doGetInputStream() throws Exception {
// VFS-210: zip allows to gather an input stream even from a directory and will
// return -1 on the first read. getType should not be expensive and keeps the tests
// running
if (!getType().hasContent()) {
throw new FileSystemException("vfs.provider/read-not-file.error", getName());
}
return fs.getZipFile().getInputStream(entry);
}
public static void main(String[] args) throws Throwable {
if (args.length < 1) {
print("Usage: java ZipInfo zfname");
} else {
Map<String, ?> env = Collections.emptyMap();
ZipFileSystem zfs =
(ZipFileSystem) (new ZipFileSystemProvider().newFileSystem(Paths.get(args[0]), env));
byte[] cen = zfs.cen;
if (cen == null) {
print("zip file is empty%n");
return;
}
int pos = 0;
byte[] buf = new byte[1024];
int no = 1;
while (pos + CENHDR < cen.length) {
print("----------------#%d--------------------%n", no++);
printCEN(cen, pos);
// use size CENHDR as the extra bytes to read, just in case the
// loc.extra is bigger than the cen.extra, try to avoid to read
// twice
long len = LOCHDR + CENNAM(cen, pos) + CENEXT(cen, pos) + CENHDR;
if (zfs.readFullyAt(buf, 0, len, locoff(cen, pos)) != len)
zfs.zerror("read loc header failed");
if (LOCEXT(buf) > CENEXT(cen, pos) + CENHDR) {
// have to read the second time;
len = LOCHDR + LOCNAM(buf) + LOCEXT(buf);
if (zfs.readFullyAt(buf, 0, len, locoff(cen, pos)) != len)
zfs.zerror("read loc header failed");
}
printLOC(buf);
pos += CENHDR + CENNAM(cen, pos) + CENEXT(cen, pos) + CENCOM(cen, pos);
}
zfs.close();
}
}