static void toHexString(String header, ByteBuffer buf) {
sb.delete(0, sb.length());
for (int index = 0; index < buf.limit(); index++) {
String hex = Integer.toHexString(0x0100 + (buf.get(index) & 0x00FF)).substring(1);
sb.append((hex.length() < 2 ? "0" : "") + hex + " ");
}
LOG.debug(
"hex->"
+ header
+ ": position,limit,capacity "
+ buf.position()
+ ","
+ buf.limit()
+ ","
+ buf.capacity());
LOG.debug("hex->" + sb.toString());
}
public void write(Tag tag, RandomAccessFile raf, RandomAccessFile tempRaf)
throws CannotWriteException, IOException {
FileChannel fc = raf.getChannel();
int oldTagSize = 0;
if (tagExists(fc)) {
// read the length
if (!canOverwrite(raf))
throw new CannotWriteException("Overwritting of this kind of ID3v2 tag not supported yet");
fc.position(6);
ByteBuffer buf = ByteBuffer.allocate(4);
fc.read(buf);
oldTagSize = (buf.get(0) & 0xFF) << 21;
oldTagSize += (buf.get(1) & 0xFF) << 14;
oldTagSize += (buf.get(2) & 0xFF) << 7;
oldTagSize += buf.get(3) & 0xFF;
oldTagSize += 10;
// System.err.println("Old tag size: "+oldTagSize);
int newTagSize = tc.getTagLength(tag);
if (oldTagSize >= newTagSize) {
// replace
// System.err.println("Old ID32v Tag found, replacing the old
// tag");
fc.position(0);
fc.write(tc.convert(tag, oldTagSize - newTagSize));
// ID3v2 Tag Written
return;
}
}
// create new tag with padding
// System.err.println("Creating a new ID3v2 Tag");
fc.position(oldTagSize);
if (fc.size() > 15 * 1024 * 1024) {
FileChannel tempFC = tempRaf.getChannel();
tempFC.position(0);
tempFC.write(tc.convert(tag, Id3v2TagCreator.DEFAULT_PADDING));
tempFC.transferFrom(fc, tempFC.position(), fc.size() - oldTagSize);
fc.close();
} else {
ByteBuffer[] content = new ByteBuffer[2];
content[1] = ByteBuffer.allocate((int) fc.size());
fc.read(content[1]);
content[1].rewind();
content[0] = tc.convert(tag, Id3v2TagCreator.DEFAULT_PADDING);
fc.position(0);
fc.write(content);
}
}
public static void main(String args[]) throws Exception {
ByteBuffer buffer = ByteBuffer.allocate(10);
for (int i = 0; i < buffer.capacity(); ++i) {
buffer.put((byte) i);
}
buffer.position(3);
buffer.limit(7);
ByteBuffer slice = buffer.slice();
for (int i = 0; i < slice.capacity(); ++i) {
byte b = slice.get(i);
b *= 11;
slice.put(i, b);
}
buffer.position(0);
buffer.limit(buffer.capacity());
while (buffer.hasRemaining()) {
System.out.println(buffer.get());
}
}
private void recv(SocketChannel sc, ClientInfo ci) throws IOException {
ci.channel.read(ci.inBuf);
ByteBuffer tmpBuf = ci.inBuf.duplicate();
tmpBuf.flip();
int bytesProcessed = 0;
boolean doneLoop = false;
while (!doneLoop) {
byte b;
try {
b = tmpBuf.get();
} catch (BufferUnderflowException bue) {
// Processed all data in buffer
ci.inBuf.clear();
doneLoop = true;
break;
}
switch (b) {
case TypeServerConstants.WELCOME:
bytesProcessed++;
break;
case TypeServerConstants.GET_STRING_REQUEST:
bytesProcessed++;
if (ci.outputPending) {
// Client is backed up. We can't append to
// the byte buffer because it's in the wrong
// state. We could allocate another buffer
// here and change our send method to know
// about multiple buffers, but we'll just
// assume that the client is dead
break;
}
ci.outBuf.put(TypeServerConstants.GET_STRING_RESPONSE);
ByteBuffer strBuf = encoder.encode(testString);
ci.outBuf.putShort((short) strBuf.remaining());
ci.outBuf.put(strBuf);
ci.outBuf.flip();
send(sc, ci);
break;
case TypeServerConstants.GET_STRING_RESPONSE:
int startPos = tmpBuf.position();
try {
int nBytes = tmpBuf.getInt();
byte[] buf = new byte[nBytes];
tmpBuf.get(buf);
bytesProcessed += buf.length + 5;
String s = new String(buf);
// Send the string to the GUI
break;
} catch (BufferUnderflowException bue) {
// Processed all available data
ci.inBuf.position(ci.inBuf.position() + bytesProcessed);
doneLoop = true;
}
break;
}
}
}
static byte[] extractByteString(ByteBuffer buf) {
int len = buf.getInt();
byte[] str = null;
if (len > 0) {
str = new byte[len];
buf.get(str, 0, len);
buf.get(); // trailing null
} else str = new byte[0];
return str;
}
static String extractString(ByteBuffer buf) throws java.io.UnsupportedEncodingException {
int len = buf.getInt();
byte[] str = null;
if (len > 0) {
str = new byte[len - 1];
;
buf.get(str, 0, len - 1);
buf.get(); // trailing null
} else str = new byte[0];
return new String(str, "UTF-8");
}
public static void main(String[] arguments) {
try {
// read byte data into a byte buffer
String data = "friends.dat";
FileInputStream inData = new FileInputStream(data);
FileChannel inChannel = inData.getChannel();
long inSize = inChannel.size();
ByteBuffer source = ByteBuffer.allocate((int) inSize);
inChannel.read(source, 0);
source.position(0);
System.out.println("Original byte data:");
for (int i = 0; source.remaining() > 0; i++) {
System.out.print(source.get() + " ");
}
// convert byte data into character data
source.position(0);
Charset ascii = Charset.forName("US-ASCII");
CharsetDecoder toAscii = ascii.newDecoder();
CharBuffer destination = toAscii.decode(source);
destination.position(0);
System.out.println("\n\nNew character data:");
for (int i = 0; destination.remaining() > 0; i++) {
System.out.print(destination.get());
}
System.out.println();
} catch (FileNotFoundException fne) {
System.out.println(fne.getMessage());
} catch (IOException ioe) {
System.out.println(ioe.getMessage());
}
}
static byte[] extractByteArray(ByteBuffer buf) {
int len = buf.getInt();
if (len > 0) {
byte[] a = new byte[len];
buf.get(a, 0, len);
return a;
} else return new byte[0];
}
private static WAVData readFromStream(AudioInputStream aIn)
throws UnsupportedAudioFileException, IOException {
ReadableByteChannel aChannel = Channels.newChannel(aIn);
AudioFormat fmt = aIn.getFormat();
int numChannels = fmt.getChannels();
int bits = fmt.getSampleSizeInBits();
int format = AL_FORMAT_MONO8;
if ((bits == 8) && (numChannels == 1)) {
format = AL_FORMAT_MONO8;
} else if ((bits == 16) && (numChannels == 1)) {
format = AL_FORMAT_MONO16;
} else if ((bits == 8) && (numChannels == 2)) {
format = AL_FORMAT_STEREO8;
} else if ((bits == 16) && (numChannels == 2)) {
format = AL_FORMAT_STEREO16;
}
int freq = Math.round(fmt.getSampleRate());
int size = aIn.available();
ByteBuffer buffer = ByteBuffer.allocateDirect(size);
while (buffer.remaining() > 0) {
aChannel.read(buffer);
}
buffer.rewind();
// Must byte swap on big endian platforms
// Thanks to swpalmer on javagaming.org forums for hint at fix
if ((bits == 16) && (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN)) {
int len = buffer.remaining();
for (int i = 0; i < len; i += 2) {
byte a = buffer.get(i);
byte b = buffer.get(i + 1);
buffer.put(i, b);
buffer.put(i + 1, a);
}
}
WAVData result = new WAVData(buffer, format, size, freq, false);
aIn.close();
return result;
}
public void run() {
try {
// Exclusive lock with no overlap:
FileLock fl = fc.lock(start, end, false);
System.out.println("Locked: " + start + " to " + end);
// Perform modification:
while (buff.position() < buff.limit() - 1) buff.put((byte) (buff.get() + 1));
fl.release();
System.out.println("Released: " + start + " to " + end);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static void main(String args[]) throws Exception {
FileInputStream fin = new FileInputStream("readandshow.txt");
FileChannel fc = fin.getChannel();
ByteBuffer buffer = ByteBuffer.allocate(1024);
fc.read(buffer);
buffer.flip();
int i = 0;
while (buffer.remaining() > 0) {
byte b = buffer.get();
System.out.println("Character " + i + ": " + ((char) b));
i++;
}
fin.close();
}
protected synchronized Message receiveMessage() throws IOException {
if (messageBuffer.size() > 0) {
Message m = (Message) messageBuffer.get(0);
messageBuffer.remove(0);
return m;
}
try {
InetSocketAddress remoteAddress = (InetSocketAddress) channel.receive(receiveBuffer);
if (remoteAddress != null) {
int len = receiveBuffer.position();
receiveBuffer.rewind();
receiveBuffer.get(buf, 0, len);
try {
IP address = IP.fromInetAddress(remoteAddress.getAddress());
int port = remoteAddress.getPort();
extractor.appendData(buf, 0, len, new SocketDescriptor(address, port));
receiveBuffer.clear();
extractor.updateAvailableMessages();
return extractor.nextMessage();
} catch (EOFException exc) {
exc.printStackTrace();
System.err.println(buf.length + ", " + len);
} catch (InvocationTargetException exc) {
exc.printStackTrace();
} catch (IllegalAccessException exc) {
exc.printStackTrace();
} catch (InstantiationException exc) {
exc.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (InvalidCompressionMethodException e) {
e.printStackTrace();
}
}
} catch (ClosedChannelException exc) {
if (isKeepAlive()) {
throw exc;
}
}
return null;
}
public static void main(String args[]) {
int count;
Path filepath = null;
// First, obtain a path to the file.
try {
filepath = Paths.get("test.txt");
} catch (InvalidPathException e) {
System.out.println("Path Error " + e);
return;
}
// Next, obtain a channel to that file within a try-with-resources block.
try (SeekableByteChannel fChan = Files.newByteChannel(filepath)) {
// Allocate a buffer.
ByteBuffer mBuf = ByteBuffer.allocate(128);
do {
// Read a buffer.
count = fChan.read(mBuf);
// Stop when end of file is reached.
if (count != -1) {
// Rewind the buffer so that it can be read.
mBuf.rewind();
// Read bytes from the buffer and show
// them on the screen as characters.
for (int i = 0; i < count; i++) System.out.print((char) mBuf.get());
}
} while (count != -1);
System.out.println();
} catch (IOException e) {
System.out.println("I/O Error " + e);
}
}
public RandomAccessFile delete(RandomAccessFile raf, RandomAccessFile tempRaf)
throws IOException {
FileChannel fc = raf.getChannel();
fc.position(0);
if (!tagExists(fc)) return raf;
fc.position(6);
ByteBuffer b = ByteBuffer.allocate(4);
fc.read(b);
b.rewind();
int tagSize = (b.get() & 0xFF) << 21;
tagSize += (b.get() & 0xFF) << 14;
tagSize += (b.get() & 0xFF) << 7;
tagSize += b.get() & 0xFF;
FileChannel tempFC = tempRaf.getChannel();
tempFC.position(0);
fc.position(tagSize + 10);
// Here we will try to skip eventual trash afer the tag and before the
// audio data
b = ByteBuffer.allocate(4);
int skip = 0;
while (fc.read(b) != -1) {
if ((b.get(0) & 0xFF) == 0xFF
&& (b.get(1) & 0xE0) == 0xE0
&& (b.get(1) & 0x06) != 0
&& (b.get(2) & 0xF0) != 0xF0
&& (b.get(2) & 0x08) != 0x08) {
fc.position(fc.position() - 4);
break;
}
fc.position(fc.position() - 3);
b.rewind();
skip++;
}
tempFC.transferFrom(fc, 0, fc.size() - tagSize - 10 - skip);
return tempRaf;
}
public static void main(String[] argv) {
if (argv.length != 3) {
usage();
}
String tempFile = argv[0];
String testFile = argv[1];
int fileSize = Integer.valueOf(argv[2]).intValue();
int exitcode = 0;
int numRead;
int numThisBuf;
int numWritten;
if ((fileSize <= 0) || (fileSize % 4096 != 0)) {
System.out.println("Error: size is not a multiple of 4096!!!!!!");
System.out.println();
usage();
}
try {
int bufSize = 4096;
byte[] inBytes = new byte[bufSize];
byte[] outBytes = new byte[bufSize];
Random ioRandom = new Random(2006);
ioRandom.nextBytes(outBytes);
ByteBuffer inBuf = ByteBuffer.allocate(bufSize);
ByteBuffer outBuf = ByteBuffer.wrap(outBytes);
//
// Loop forever
//
while (true) {
//
// Write the temporary file
//
FileOutputStream fos = new FileOutputStream(tempFile);
FileChannel foc = fos.getChannel();
numWritten = 0;
while (numWritten < fileSize) {
outBuf.clear(); // sets limit to capacity & position to zero
while (outBuf.hasRemaining()) {
numWritten += foc.write(outBuf);
}
}
//
// Move to permanent location
//
FileChannel srcChannel = new FileInputStream(tempFile).getChannel();
FileChannel dstChannel = new FileOutputStream(testFile).getChannel();
dstChannel.transferFrom(srcChannel, 0, srcChannel.size());
srcChannel.close();
dstChannel.close();
boolean success = (new File(tempFile)).delete();
if (!success) {
System.out.println("Warning: unable to delete temporary file");
}
//
// Read and compare
//
FileInputStream fis = new FileInputStream(testFile);
FileChannel fic = fis.getChannel();
for (numRead = 0, numThisBuf = 0; numRead < fileSize; numThisBuf = 0) {
inBuf.rewind(); // Set the buffer position to 0
numThisBuf = fic.read(inBuf);
while (numThisBuf < bufSize) {
numThisBuf += fic.read(inBuf);
}
numRead += bufSize;
inBuf.rewind(); // Set the buffer position to 0
inBuf.get(inBytes);
boolean same = Arrays.equals(inBytes, outBytes);
if (same = false) {
System.out.println("Data read does not equal data written at " + numRead + " bytes");
}
}
}
} catch (FileNotFoundException fnfe) {
fnfe.printStackTrace(System.err);
exitcode = 1;
// break;
} catch (SecurityException se) {
se.printStackTrace(System.err);
exitcode = 1;
// break;
} catch (Throwable t) {
t.printStackTrace(System.err);
exitcode = 1;
}
System.exit(exitcode);
}
public static void main(String[] args) {
try {
System.out.println("CliTest.java");
// create TCP socket channel
SocketChannel channel = SocketChannel.open();
System.out.println("CliTest.java: channel created");
channel.connect(new InetSocketAddress("localhost", PORT));
System.out.println("CliTest.java: channel socket connected");
System.out.println();
// create & send a login message
byte[] bytes = LoginMessage.getLoginMessage("user1", "password1");
System.out.println("CliTest.java: login message created");
System.out.println(LoginMessage.getMessageString(bytes));
System.out.printf("CliTest.java: login message length in bytes: %d\n", bytes.length);
ByteBuffer buf = ByteBuffer.allocate(4096);
buf.put(bytes);
buf.flip();
// System.out.printf("CliTest.java: buf.remaining before channel.write(): %d\n",
// buf.remaining());
int numwritten = channel.write(buf);
System.out.printf(
"CliTest.java: login mesage written: number of bytes written: %d\n", numwritten);
// read reply message
buf.clear();
int numread = channel.read(buf);
bytes = new byte[numread];
buf.flip();
buf.get(bytes);
if (LoginMessage.isLoginSuccessMessage(bytes)) {
System.out.printf(
"CliTest.java: first message read: Success Message: number of bytes read: %d\n",
numread);
// get remote port number from success message
int port = LoginMessage.getPort(bytes);
System.out.printf("Port Number: %d\n", port);
byte playerid = LoginMessage.getPlayerId(bytes);
System.out.printf("Player id: %d\n", playerid);
String mcastString = LoginMessage.getMulticastAddress(bytes);
System.out.printf("Multicast Address: %s\n", mcastString);
// create datagram channel & connect to rem port
DatagramChannel dchannel = DatagramChannel.open();
dchannel.socket().bind(new InetSocketAddress(0));
dchannel.socket().connect(new InetSocketAddress(channel.socket().getInetAddress(), port));
// get localport of datagram socket
int localport = dchannel.socket().getLocalPort();
System.out.printf("UDP local port: %d\n", localport);
// send success message to send port number to server
bytes = LoginMessage.getLoginSuccessMessage(playerid, null, localport);
buf.clear();
buf.put(bytes);
buf.flip();
channel.write(buf);
DeathMessage dm = new DeathMessage((byte) 1, (byte) 1);
bytes = dm.getByteMessage();
buf.clear();
buf.put(bytes);
buf.flip();
channel.write(buf);
} else {
System.out.printf(
"CliTest.java: first message read: NOT Success Message: number of bytes read: %d\n",
numread);
}
channel.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private void readMessage(SelectionKey sk, SocketChannel readChannel, TcpAddress incomingAddress)
throws IOException {
// note that socket has been used
SocketEntry entry = (SocketEntry) sockets.get(incomingAddress);
if (entry != null) {
entry.used();
ByteBuffer readBuffer = entry.getReadBuffer();
if (readBuffer != null) {
readChannel.read(readBuffer);
if (readBuffer.hasRemaining()) {
readChannel.register(selector, SelectionKey.OP_READ, entry);
} else {
dispatchMessage(incomingAddress, readBuffer, readBuffer.capacity());
}
return;
}
}
ByteBuffer byteBuffer = ByteBuffer.wrap(buf);
byteBuffer.limit(messageLengthDecoder.getMinHeaderLength());
long bytesRead = readChannel.read(byteBuffer);
if (logger.isDebugEnabled()) {
logger.debug("Reading header " + bytesRead + " bytes from " + incomingAddress);
}
MessageLength messageLength = new MessageLength(0, Integer.MIN_VALUE);
if (bytesRead == messageLengthDecoder.getMinHeaderLength()) {
messageLength = messageLengthDecoder.getMessageLength(ByteBuffer.wrap(buf));
if (logger.isDebugEnabled()) {
logger.debug("Message length is " + messageLength);
}
if ((messageLength.getMessageLength() > getMaxInboundMessageSize())
|| (messageLength.getMessageLength() <= 0)) {
logger.error(
"Received message length "
+ messageLength
+ " is greater than inboundBufferSize "
+ getMaxInboundMessageSize());
synchronized (entry) {
entry.getSocket().close();
logger.info("Socket to " + entry.getPeerAddress() + " closed due to an error");
}
} else {
byteBuffer.limit(messageLength.getMessageLength());
bytesRead += readChannel.read(byteBuffer);
if (bytesRead == messageLength.getMessageLength()) {
dispatchMessage(incomingAddress, byteBuffer, bytesRead);
} else {
byte[] message = new byte[byteBuffer.limit()];
byteBuffer.flip();
byteBuffer.get(message, 0, byteBuffer.limit() - byteBuffer.remaining());
entry.setReadBuffer(ByteBuffer.wrap(message));
}
readChannel.register(selector, SelectionKey.OP_READ, entry);
}
} else if (bytesRead < 0) {
logger.debug("Socket closed remotely");
sk.cancel();
readChannel.close();
TransportStateEvent e =
new TransportStateEvent(
DefaultTcpTransportMapping.this,
incomingAddress,
TransportStateEvent.STATE_DISCONNECTED_REMOTELY,
null);
fireConnectionStateChanged(e);
}
}