List of usage examples for java.nio.channels SocketChannel open
public static SocketChannel open(SocketAddress remote) throws IOException
From source file:MainClass.java
public static void main(String[] args) throws Exception { int port = 1919; SocketAddress address = new InetSocketAddress("127.0.0.1", port); SocketChannel client = SocketChannel.open(address); ByteBuffer buffer = ByteBuffer.allocate(4); IntBuffer view = buffer.asIntBuffer(); for (int expected = 0;; expected++) { client.read(buffer);// w w w. j a va 2s. c om int actual = view.get(); buffer.clear(); view.rewind(); if (actual != expected) { System.err.println("Expected " + expected + "; was " + actual); break; } System.out.println(actual); } }
From source file:MainClass.java
public static void main(String[] args) throws Exception { int port = 19; SocketAddress address = new InetSocketAddress("127.0.0.1", port); SocketChannel client = SocketChannel.open(address); ByteBuffer buffer = ByteBuffer.allocate(74); WritableByteChannel out = Channels.newChannel(System.out); while (client.read(buffer) != -1) { buffer.flip();/*from w w w .j a v a2s . c o m*/ out.write(buffer); buffer.clear(); } }
From source file:MainClass.java
public static void main(String[] args) throws IOException { URL u = new URL("http://www.java2s.com"); String host = u.getHost();/*from ww w .j av a 2 s . co m*/ int port = 80; String file = "/"; SocketAddress remote = new InetSocketAddress(host, port); SocketChannel channel = SocketChannel.open(remote); FileOutputStream out = new FileOutputStream("yourfile.htm"); FileChannel localFile = out.getChannel(); String request = "GET " + file + " HTTP/1.1\r\n" + "User-Agent: HTTPGrab\r\n" + "Accept: text/*\r\n" + "Connection: close\r\n" + "Host: " + host + "\r\n" + "\r\n"; ByteBuffer header = ByteBuffer.wrap(request.getBytes("US-ASCII")); channel.write(header); ByteBuffer buffer = ByteBuffer.allocate(8192); while (channel.read(buffer) != -1) { buffer.flip(); localFile.write(buffer); buffer.clear(); } localFile.close(); channel.close(); }
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);/*from w w w . ja v a 2s .c om*/ // 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 SocketChannel connect(int port) throws IOException { SocketAddress sa = new InetSocketAddress("127.0.0.1", port); return SocketChannel.open(sa); }
From source file:org.springframework.boot.devtools.tunnel.server.SocketTargetServerConnection.java
@Override public ByteChannel open(int socketTimeout) throws IOException { SocketAddress address = new InetSocketAddress(this.portProvider.getPort()); logger.trace("Opening tunnel connection to target server on " + address); SocketChannel channel = SocketChannel.open(address); channel.socket().setSoTimeout(socketTimeout); return new TimeoutAwareChannel(channel); }
From source file:org.apache.james.imap.tester.builder.ScriptBuilder.java
public static ScriptBuilder open(String host, int port) throws Exception { InetSocketAddress address = new InetSocketAddress(host, port); SocketChannel socket = SocketChannel.open(address); socket.configureBlocking(false);/*from w w w. ja v a 2 s . c o m*/ Client client = new Client(socket, socket); return new ScriptBuilder(client); }
From source file:com.github.neoio.nio.util.NIOUtils.java
public static SocketChannel openClientSocket(Selector selector, SocketAddress endPointAddress) throws NetSocketException { SocketChannel toReturn;/*from www .j av a 2 s . c o m*/ try { toReturn = SocketChannel.open(endPointAddress); toReturn.configureBlocking(false); toReturn.register(selector, SelectionKey.OP_READ); } catch (IOException e) { logger.error("IOException occurred while opening client socket", e); toReturn = null; } return toReturn; }
From source file:InterruptibleSocketTest.java
/** * Connects to the test server, using interruptible I/O */// ww w . ja va2s. c o m public void connectInterruptibly() throws IOException { messages.append("Interruptible:\n"); SocketChannel channel = SocketChannel.open(new InetSocketAddress("localhost", 8189)); try { in = new Scanner(channel); while (!Thread.currentThread().isInterrupted()) { messages.append("Reading "); if (in.hasNextLine()) { String line = in.nextLine(); messages.append(line); messages.append("\n"); } } } finally { channel.close(); EventQueue.invokeLater(new Runnable() { public void run() { messages.append("Channel closed\n"); interruptibleButton.setEnabled(true); blockingButton.setEnabled(true); } }); } }
From source file:jp.queuelinker.system.net.SelectorThread.java
public int connectChannel(final SocketAddress remoteAddress, final SelectorCallBack callBack) throws IOException { SocketChannel socketChannel = SocketChannel.open(remoteAddress); socketChannel.configureBlocking(false); // socketChannel.socket().setTcpNoDelay(true); socketChannel.socket().setReuseAddress(true); return addSocketChannel(socketChannel, callBack); }