if (args.length != 2) {
System.err.println("Usage: java HTTPGrab url filename");
return;
}
URL u = new URL(args[0]);
if (!u.getProtocol().equalsIgnoreCase("http")) {
System.err.println("Sorry, " + u.getProtocol()
+ " is not supported");
return;
}
String host = u.getHost();
int port = u.getPort();
String file = u.getFile();
if (file == null) file = "/";
if (port <= 0) port = 80;
SocketAddress remote = new InetSocketAddress(host, port);
SocketChannel channel = SocketChannel.open(remote);
FileOutputStream out = new FileOutputStream(args[1]);
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();
