/** 把当前客户端信息 推送到其他客户端 */
private void dispatch(SocketChannel client, String info) throws IOException {
Socket s = client.socket();
String name =
"["
+ s.getInetAddress().toString().substring(1)
+ ":"
+ Integer.toHexString(client.hashCode())
+ "]";
if (!clientsMap.isEmpty()) {
for (Map.Entry<String, SocketChannel> entry : clientsMap.entrySet()) {
SocketChannel temp = entry.getValue();
if (!client.equals(temp)) {
sendBuffer.clear();
sendBuffer.put((name + ":" + info).getBytes());
sendBuffer.flip();
// 输出到通道
temp.write(sendBuffer);
}
}
}
clientsMap.put(name, client);
}
public void run() {
Selector selector = null;
try {
curSocketChannel = SocketChannel.open();
InetSocketAddress isa = new InetSocketAddress(curHost, curPort);
curSocketChannel.connect(isa);
curSocketChannel.configureBlocking(false);
selector = Selector.open();
curSocketChannel.register(selector, SelectionKey.OP_READ);
servers.put(curHost, curSocketChannel);
send(curSocketChannel, MessageUtils.hello(clientName));
} catch (Exception ex) {
System.err.println("Error in getting connection: " + ex.getMessage());
System.exit(1);
}
try {
while (true) {
int num = selector.select();
if (num == 0) {
continue;
}
Set keys = selector.selectedKeys();
Iterator it = keys.iterator();
while (it.hasNext()) {
SelectionKey key = (SelectionKey) it.next();
if ((key.readyOps() & SelectionKey.OP_READ) == SelectionKey.OP_READ) {
SocketChannel sc = null;
try {
sc = (SocketChannel) key.channel();
if (sc.equals(curSocketChannel)) {
boolean ok = processInput(sc);
if (!ok) {
key.cancel();
Socket s = null;
try {
s = sc.socket();
s.close();
} catch (IOException ie) {
System.err.println("Error closing socket " + s + ": " + ie);
System.exit(1);
}
}
}
} catch (IOException ie) {
key.cancel();
String serverToQuitFrom = getKey(sc);
if (serverToQuitFrom != null) {
IOUtils.closeFile(serverToQuitFrom, sc);
servers.remove(serverToQuitFrom);
System.out.println(serverToQuitFrom + " was closed.");
}
}
}
}
keys.clear();
}
} catch (Exception ex) {
System.err.println(ex.getMessage());
System.exit(1);
}
}
public static void checkClients(List<SocketChannel> anonymousClients) {
try {
if (selector.selectNow() == 0) {
return;
}
Set<SelectionKey> keys = selector.selectedKeys();
for (SelectionKey key : keys) {
if ((key.readyOps() & SelectionKey.OP_ACCEPT) == SelectionKey.OP_ACCEPT) {
SocketChannel clientSocket = serverSocket.accept();
if (clientSocket == null) {
System.err.println("Error: can not accept");
continue;
}
anonymousClients.add(clientSocket);
clientSocket.configureBlocking(false);
clientSocket.register(selector, SelectionKey.OP_READ);
} else if ((key.readyOps() & SelectionKey.OP_READ) == SelectionKey.OP_READ) {
SocketChannel clientSocket = (SocketChannel) key.channel();
ByteBuffer bytes = ByteBuffer.allocate(4096);
if (clientSocket.read(bytes) != -1) {
byte[] message = bytes.array();
switch (message[0]) {
case 1:
{
String nick = MessageUtils.parseMessage(message).first;
if (!checkMessage(nick, "", clientSocket)) {
continue;
}
if (clients.containsKey(nick) || nick.length() > 32) {
if (nick.length() > 32) {
sendMessage(
clientSocket, MessageUtils.error("<server>: your nick is too long"));
} else {
sendMessage(
clientSocket,
MessageUtils.error("<server>: another user is using this nick"));
}
sendMessage(clientSocket, MessageUtils.bye());
anonymousClients.remove(clientSocket);
Utils.tryClose(clientSocket);
} else {
System.out.println(nick + " enter this chatroom");
notifyAllClients(nick + " enter this chatroom");
sendMessage(
clientSocket,
MessageUtils.message("<server>", "Wellcome, your nick is " + nick));
anonymousClients.remove(clientSocket);
clients.put(nick, clientSocket);
}
break;
}
case 2:
{
String nick = getNickFromSocket(clientSocket);
if (nick == null) {
Utils.printErrorAndExit("Error: it could not happen");
}
Utils.Pair<String, String> pair = MessageUtils.parseMessage(message);
if (!checkMessage(pair.first, pair.second, clientSocket)) {
continue;
}
if (!pair.first.equals(nick)) {
System.out.println("Cheater: " + nick);
sendMessage(clientSocket, MessageUtils.message("<server>", "do not cheat"));
}
for (Entry<String, SocketChannel> client : clients.entrySet()) {
if (!clientSocket.equals(client.getValue())) {
sendMessage(client.getValue(), MessageUtils.message(nick, pair.second));
}
}
break;
}
case 3:
disconnectClient(clientSocket);
break;
case 127:
{
String nick = getNickFromSocket(clientSocket);
Utils.Pair<String, String> pair = MessageUtils.parseMessage(message);
if (!checkMessage(pair.first, pair.second, clientSocket)) {
continue;
}
if (!pair.first.equals(nick)) {
System.out.println("Cheater: " + nick);
sendMessage(clientSocket, MessageUtils.message("<server>", "do not cheat"));
}
System.out.println(nick + ": " + pair.second);
break;
}
default:
System.out.println("Bad message from " + getNickFromSocket(clientSocket));
sendMessage(clientSocket, MessageUtils.message("<server>", "bad message"));
break;
}
} else {
disconnectClient(clientSocket);
}
}
}
keys.clear();
} catch (Exception expt) {
expt.printStackTrace();
Utils.printErrorAndExit(expt.getMessage());
}
}