List of usage examples for java.nio ByteBuffer get
public abstract byte get(int index);
From source file:com.openteach.diamond.network.waverider.session.DefaultSession.java
public static void main(String[] args) { BlockingQueue<ByteBuffer> inputBuffer = new LinkedBlockingQueue<ByteBuffer>(); /*for (int i = 0; i < 10; i++) {*//*from w w w.j ava2s . c o m*/ ByteBuffer byteBuffer = ByteBuffer.allocate(1024); byteBuffer.put(makePacket().marshall()); byteBuffer.put(makePacket().marshall()); byteBuffer.flip(); byte[] b = new byte[8]; ByteBuffer halfBuf0 = ByteBuffer.allocate(8); byteBuffer.get(b); halfBuf0.put(b); halfBuf0.flip(); inputBuffer.add(halfBuf0); inputBuffer.add(byteBuffer); /*}*/ int size = 0; int oldSize = size; long length = Packet.getHeaderSize(); ByteBuffer buffer = ByteBuffer.allocate(NetWorkConstants.DEFAULT_NETWORK_BUFFER_SIZE); ByteBuffer currentBuffer = null; while (size < length) { currentBuffer = inputBuffer.peek(); oldSize = size; int position = currentBuffer.position(); size += currentBuffer.remaining(); buffer.put(currentBuffer); if (size >= Packet.getHeaderSize()) { length = buffer.getLong(Packet.getLengthPosition()); } if (size <= length) { inputBuffer.remove(); } else { currentBuffer.position(position); buffer.position(buffer.position() - currentBuffer.remaining()); byte[] buf = new byte[(int) (length - oldSize)]; currentBuffer.get(buf); buffer.put(buf); } } // buffer.position(0); buffer.flip(); Packet packet = Packet.unmarshall(buffer); Command command = CommandFactory.createCommand(packet.getType(), packet.getPayLoad()); String str = new String(command.getPayLoad().array()); System.out.println(str); }
From source file:HttpGet.java
public static void main(String[] args) { SocketChannel server = null; // Channel for reading from server FileOutputStream outputStream = null; // Stream to destination file WritableByteChannel destination; // Channel to write to it try { // Exception handling and channel closing code follows this block // Parse the URL. Note we use the new java.net.URI, not URL here. URI uri = new URI(args[0]); // Now query and verify the various parts of the URI String scheme = uri.getScheme(); if (scheme == null || !scheme.equals("http")) throw new IllegalArgumentException("Must use 'http:' protocol"); String hostname = uri.getHost(); int port = uri.getPort(); if (port == -1) port = 80; // Use default port if none specified String path = uri.getRawPath(); if (path == null || path.length() == 0) path = "/"; String query = uri.getRawQuery(); query = (query == null) ? "" : '?' + query; // Combine the hostname and port into a single address object. // java.net.SocketAddress and InetSocketAddress are new in Java 1.4 SocketAddress serverAddress = new InetSocketAddress(hostname, port); // Open a SocketChannel to the server server = SocketChannel.open(serverAddress); // Put together the HTTP request we'll send to the server. String request = "GET " + path + query + " HTTP/1.1\r\n" + // The request "Host: " + hostname + "\r\n" + // Required in HTTP 1.1 "Connection: close\r\n" + // Don't keep connection open "User-Agent: " + HttpGet.class.getName() + "\r\n" + "\r\n"; // Blank // line // indicates // end of // request // headers // Now wrap a CharBuffer around that request string CharBuffer requestChars = CharBuffer.wrap(request); // Get a Charset object to encode the char buffer into bytes Charset charset = Charset.forName("ISO-8859-1"); // Use the charset to encode the request into a byte buffer ByteBuffer requestBytes = charset.encode(requestChars); // Finally, we can send this HTTP request to the server. server.write(requestBytes);//w w w. j av a2s . c o m // Set up an output channel to send the output to. if (args.length > 1) { // Use a specified filename outputStream = new FileOutputStream(args[1]); destination = outputStream.getChannel(); } else // Or wrap a channel around standard out destination = Channels.newChannel(System.out); // Allocate a 32 Kilobyte byte buffer for reading the response. // Hopefully we'll get a low-level "direct" buffer ByteBuffer data = ByteBuffer.allocateDirect(32 * 1024); // Have we discarded the HTTP response headers yet? boolean skippedHeaders = false; // The code sent by the server int responseCode = -1; // Now loop, reading data from the server channel and writing it // to the destination channel until the server indicates that it // has no more data. while (server.read(data) != -1) { // Read data, and check for end data.flip(); // Prepare to extract data from buffer // All HTTP reponses begin with a set of HTTP headers, which // we need to discard. The headers end with the string // "\r\n\r\n", or the bytes 13,10,13,10. If we haven't already // skipped them then do so now. if (!skippedHeaders) { // First, though, read the HTTP response code. // Assume that we get the complete first line of the // response when the first read() call returns. Assume also // that the first 9 bytes are the ASCII characters // "HTTP/1.1 ", and that the response code is the ASCII // characters in the following three bytes. if (responseCode == -1) { responseCode = 100 * (data.get(9) - '0') + 10 * (data.get(10) - '0') + 1 * (data.get(11) - '0'); // If there was an error, report it and quit // Note that we do not handle redirect responses. if (responseCode < 200 || responseCode >= 300) { System.err.println("HTTP Error: " + responseCode); System.exit(1); } } // Now skip the rest of the headers. try { for (;;) { if ((data.get() == 13) && (data.get() == 10) && (data.get() == 13) && (data.get() == 10)) { skippedHeaders = true; break; } } } catch (BufferUnderflowException e) { // If we arrive here, it means we reached the end of // the buffer and didn't find the end of the headers. // There is a chance that the last 1, 2, or 3 bytes in // the buffer were the beginning of the \r\n\r\n // sequence, so back up a bit. data.position(data.position() - 3); // Now discard the headers we have read data.compact(); // And go read more data from the server. continue; } } // Write the data out; drain the buffer fully. while (data.hasRemaining()) destination.write(data); // Now that the buffer is drained, put it into fill mode // in preparation for reading more data into it. data.clear(); // data.compact() also works here } } catch (Exception e) { // Report any errors that arise System.err.println(e); System.err.println("Usage: java HttpGet <URL> [<filename>]"); } finally { // Close the channels and output file stream, if needed try { if (server != null && server.isOpen()) server.close(); if (outputStream != null) outputStream.close(); } catch (IOException e) { } } }
From source file:Main.java
public static short getUnsignedByte(ByteBuffer bb, int position) { return ((short) (bb.get(position) & (short) 0xff)); }
From source file:Main.java
public static short getUnsignedByte(final ByteBuffer pByteBuffer, final int pPosition) { return (short) (pByteBuffer.get(pPosition) & (short) 0xFF); }
From source file:Main.java
public static InputStream toStream(ByteBuffer bytebuffer) { byte abyte0[] = new byte[bytebuffer.remaining()]; bytebuffer.get(abyte0); return new ByteArrayInputStream(abyte0); }
From source file:Main.java
public static String readMAString(ByteBuffer in) { int tmp = in.getInt(); byte[] dst = new byte[tmp]; in.get(dst); String ret = Charset.forName("UTF-8").decode(ByteBuffer.wrap(dst)).toString(); return ret;//w w w . j av a 2s . co m }
From source file:Main.java
private static void skipStartCode(ByteBuffer prefixedSpsBuffer) { byte[] prefix3 = new byte[3]; prefixedSpsBuffer.get(prefix3); if (Arrays.equals(prefix3, AVC_START_CODE_3)) return;/* w w w . ja v a 2 s . co m*/ byte[] prefix4 = Arrays.copyOf(prefix3, 4); prefix4[3] = prefixedSpsBuffer.get(); if (Arrays.equals(prefix4, AVC_START_CODE_4)) return; throw new IllegalStateException("AVC NAL start code does not found in csd."); }
From source file:Main.java
public static int getTypeNew(ByteBuffer buf) { int type = -1; if (buf != null && buf.capacity() > 11) { type = buf.get(11); }//from w w w . j ava 2 s .c o m return type; }
From source file:Main.java
/** * Wraps a ByteBuffer in an InputStream. * /*from ww w. j av a 2s . c o m*/ * @param byteBuffer The ByteBuffer to wrap. * * @return An InputStream wrapping the ByteBuffer content. */ public static InputStream toStream(ByteBuffer byteBuffer) { byte[] bytes = new byte[byteBuffer.remaining()]; byteBuffer.get(bytes); return new ByteArrayInputStream(bytes); }
From source file:Main.java
private static byte[] encode(String text, Charset charset) { ByteBuffer buffer = charset.encode(text); byte[] bytes = new byte[buffer.limit()]; buffer.get(bytes); return bytes; }