Ejemplo n.º 1
1
  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());
  }
Ejemplo n.º 2
0
  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);
    }
  }
Ejemplo n.º 3
0
  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());
    }
  }
Ejemplo n.º 4
0
 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;
     }
   }
 }
Ejemplo n.º 5
0
 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;
 }
Ejemplo n.º 6
0
 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");
 }
Ejemplo n.º 7
0
 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());
   }
 }
Ejemplo n.º 8
0
 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];
 }
Ejemplo n.º 9
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;
  }
Ejemplo n.º 10
0
 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);
   }
 }
Ejemplo n.º 11
0
  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();
  }
Ejemplo n.º 12
0
 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;
 }
Ejemplo n.º 13
0
  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);
    }
  }
Ejemplo n.º 14
0
  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;
  }
Ejemplo n.º 15
0
  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);
  }
Ejemplo n.º 16
0
  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);
   }
 }