Java BIO socket

package org.rx.socks;
 
import lombok.extern.slf4j.Slf4j;
import org.rx.core.LogWriter;
import org.rx.core.NQuery;
import org.rx.beans.DateTime;
 
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;
 
import java.util.Map;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedDeque;
 
import static org.rx.core.Contract.require;
 
@Slf4j
public final class SocketPool extends Traceable implements AutoCloseable {
    public static final class PooledSocket implements AutoCloseable {
        private final SocketPool owner;
        private DateTime lastActive;
        public final Socket socket;
 
        public boolean isConnected() {
            return !owner.isClosed() && !socket.isClosed() && socket.isConnected();
        }
 
        public DateTime getLastActive() {
            return lastActive;
        }
 
        public void setLastActive(DateTime lastActive) {
            this.lastActive = lastActive;
        }
 
        private PooledSocket(SocketPool owner, Socket socket) {
            this.owner = owner;
            this.socket = socket;
            lastActive = DateTime.utcNow();
        }
 
        @Override
        public void close() {
            owner.returnSocket(this);
        }
    }
 
    public static final SocketPool Pool = new SocketPool();
    private static final int DefaultConnectTimeout = 30000;
    private static final int DefaultMaxIdleMillis = 120000;
    private static final int DefaultMaxSocketsCount = 64;
    private final ConcurrentHashMap<InetSocketAddress, ConcurrentLinkedDeque<PooledSocket>> pool;
    private volatile int connectTimeout;
    private volatile int maxIdleMillis;
    private volatile int maxSocketsCount;
    private final Timer timer;
    private volatile boolean isTimerRun;
 
    public int getConnectTimeout() {
        return connectTimeout;
    }
 
    public void setConnectTimeout(int connectTimeout) {
        this.connectTimeout = connectTimeout;
    }
 
    public int getMaxIdleMillis() {
        return maxIdleMillis;
    }
 
    public void setMaxIdleMillis(int maxIdleMillis) {
        if (maxIdleMillis <= 0) {
            maxIdleMillis = DefaultMaxIdleMillis;
        }
        this.maxIdleMillis = maxIdleMillis;
    }
 
    public int getMaxSocketsCount() {
        return maxSocketsCount;
    }
 
    public void setMaxSocketsCount(int maxSocketsCount) {
        if (maxSocketsCount < 0) {
            maxSocketsCount = 0;
        }
        this.maxSocketsCount = maxSocketsCount;
    }
 
    private SocketPool() {
        pool = new ConcurrentHashMap<>();
        connectTimeout = DefaultConnectTimeout;
        maxIdleMillis = DefaultMaxIdleMillis;
        maxSocketsCount = DefaultMaxSocketsCount;
        String n = "SocketPool";
        timer = new Timer(n, true);
        LogWriter tracer = new LogWriter();
        tracer.setPrefix(n + " ");
        tracer.info("started..");
        setTracer(tracer);
    }
 
    @Override
    protected void freeObjects() {
        clear();
    }
 
    private void runTimer() {
        if (isTimerRun) {
            return;
        }
        synchronized (timer) {
            if (isTimerRun) {
                return;
            }
 
            long period = 90000;
            timer.schedule(new TimerTask() {
                @Override
                public void run() {
                    clearIdleSockets();
                }
            }, period, period);
            isTimerRun = true;
        }
        getTracer().info("runTimer..");
    }
 
    private void clearIdleSockets() {
        for (Map.Entry<InetSocketAddress, ConcurrentLinkedDeque<PooledSocket>> entry : NQuery.of(pool.entrySet())) {
            ConcurrentLinkedDeque<PooledSocket> sockets = entry.getValue();
            if (sockets == null) {
                continue;
            }
 
            for (PooledSocket socket : NQuery.of(sockets)) {
                if (!socket.isConnected()
                        || DateTime.utcNow().subtract(socket.getLastActive()).getTotalMilliseconds() >= maxIdleMillis) {
                    sockets.remove(socket);
                    getTracer().info("clear idle socket[local=%s, remote=%s]..",
                            Sockets.getId(socket.socket, false), Sockets.getId(socket.socket, true));
                }
            }
            if (sockets.isEmpty()) {
                pool.remove(entry.getKey());
            }
        }
        if (pool.size() == 0) {
            stopTimer();
        }
    }
 
    private void stopTimer() {
        synchronized (timer) {
            timer.cancel();
            timer.purge();
            isTimerRun = false;
        }
        getTracer().info("stopTimer..");
    }
 
    private ConcurrentLinkedDeque<PooledSocket> getSockets(InetSocketAddress remoteAddr) {
        ConcurrentLinkedDeque<PooledSocket> sockets = pool.get(remoteAddr);
        if (sockets == null) {
            pool.put(remoteAddr, sockets = new ConcurrentLinkedDeque<>());
            runTimer();
        }
        return sockets;
    }
 
    public PooledSocket borrowSocket(InetSocketAddress remoteAddr) {
        checkNotClosed();
        require(remoteAddr);
 
        boolean isExisted = true;
        ConcurrentLinkedDeque<PooledSocket> sockets = getSockets(remoteAddr);
        PooledSocket pooledSocket;
        if ((pooledSocket = sockets.pollFirst()) == null) {
            Socket sock = new Socket();
            try {
                sock.connect(remoteAddr, connectTimeout);
            } catch (IOException ex) {
                throw new SocketException(remoteAddr, ex);
            }
            pooledSocket = new PooledSocket(this, sock);
            isExisted = false;
        }
        if (!pooledSocket.isConnected()) {
            if (isExisted) {
                sockets.remove(pooledSocket);
            }
            return borrowSocket(remoteAddr);
        }
        Socket sock = pooledSocket.socket;
        getTracer().info("borrow %s socket[local=%s, remote=%s]..", isExisted ? "existed" : "new",
                Sockets.getId(sock, false), Sockets.getId(sock, true));
        return pooledSocket;
    }
 
    public void returnSocket(PooledSocket pooledSocket) {
        checkNotClosed();
        require(pooledSocket);
 
        String action = "return";
        try {
            if (!pooledSocket.isConnected()) {
                action = "discard closed";
                return;
            }
            pooledSocket.setLastActive(DateTime.utcNow());
            ConcurrentLinkedDeque<PooledSocket> sockets = getSockets(
                    (InetSocketAddress) pooledSocket.socket.getRemoteSocketAddress());
            if (sockets.size() >= maxSocketsCount || sockets.contains(pooledSocket)) {
                action = "discard contains";
                return;
            }
 
            sockets.addFirst(pooledSocket);
        } finally {
            Socket sock = pooledSocket.socket;
            getTracer().info("%s socket[local=%s, remote=%s]..", action, Sockets.getId(sock, false),
                    Sockets.getId(sock, true));
        }
    }
 
    public void clear() {
        checkNotClosed();
 
        for (Socket socket : NQuery.of(pool.values()).selectMany(p -> p).select(p -> p.socket)) {
            try {
                getTracer().info("clear socket[local=%s, remote=%s]..", Sockets.getId(socket, false),
                        Sockets.getId(socket, true));
                Sockets.close(socket);
            } catch (Exception ex) {
                log.error("SocketPool clear", ex);
            }
        }
        pool.clear();
    }
}

package org.rx.socks;
 
import org.rx.core.Disposable;
import org.rx.core.LogWriter;
 
import static org.rx.core.Contract.isNull;
 
public abstract class Traceable extends Disposable {
    private LogWriter tracer;
 
    public LogWriter getTracer() {
        return tracer;
    }
 
    public synchronized void setTracer(LogWriter tracer) {
        this.tracer = isNull(tracer, new LogWriter());
    }
}

package org.rx.socks;
 
import lombok.extern.slf4j.Slf4j;
import org.rx.beans.$;
import org.rx.beans.Tuple;
import org.rx.util.BufferSegment;
import org.rx.util.BytesSegment;
import org.rx.core.*;
import org.rx.core.AsyncTask;
import org.rx.io.MemoryStream;
 
import java.io.IOException;
import java.net.*;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
 
import static org.rx.beans.$.$;
import static org.rx.core.Contract.isNull;
import static org.rx.core.Contract.require;
 
@Slf4j
public class DirectSocket extends Traceable implements AutoCloseable {
    @FunctionalInterface
    public interface SocketSupplier {
        Tuple<AutoCloseable, Socket> get(MemoryStream pack);
    }
 
    private static class ClientItem {
        private final DirectSocket owner;
        private final BufferSegment segment;
        public final NetworkStream stream;
        public final AutoCloseable toSock;
        public final NetworkStream toStream;
 
        public ClientItem(Socket client, DirectSocket owner) {
            this.owner = owner;
            segment = new BufferSegment(Contract.config.getDefaultBufferSize(), 2);
            try {
                stream = new NetworkStream(client, segment.alloc());
                if (owner.directAddress != null) {
                    SocketPool.PooledSocket pooledSocket = App.retry(owner.connectRetryCount,
                            p -> SocketPool.Pool.borrowSocket(p.directAddress), owner);
                    toSock = pooledSocket;
                    toStream = new NetworkStream(pooledSocket.socket, segment.alloc(), false);
                    return;
                }
                if (owner.directSupplier != null) {
                    MemoryStream firstPack = new MemoryStream(32, true);
                    BytesSegment buffer = stream.getSegment();
                    int read;
                    while ((read = stream.readSegment()) > 0) {
                        System.out.println("----:" + Bytes.toString(buffer.array, buffer.offset, read));
                        firstPack.write(buffer.array, buffer.offset, read);
                        Tuple<AutoCloseable, Socket> toSocks;
                        if ((toSocks = owner.directSupplier.get(firstPack)) != null) {
                            toSock = toSocks.left;
                            firstPack.writeTo(toStream = new NetworkStream(toSocks.right, segment.alloc(), false));
                            return;
                        }
                    }
                    log.info("DirectSocket ClientState directSupplier read: {}\ncontent: {}", read,
                            Bytes.toString(firstPack.toArray(), 0, firstPack.getLength()));
                }
            } catch (IOException ex) {
                throw new SocketException((InetSocketAddress) client.getLocalSocketAddress(), ex);
            }
            throw new SocketException((InetSocketAddress) client.getLocalSocketAddress(),
                    "DirectSocket directSupplier error");
        }
 
        public void closeSocket() {
            owner.getTracer().info("client close socket[%s->%s]..", Sockets.getId(stream.getSocket(), false),
                    Sockets.getId(stream.getSocket(), true));
            owner.clients.remove(this);
            stream.close();
        }
 
        public void closeToSocket(boolean pooling) {
            owner.getTracer().info("client %s socket[%s->%s]..", pooling ? "pooling" : "close",
                    Sockets.getId(toStream.getSocket(), false), Sockets.getId(toStream.getSocket(), true));
            if (pooling) {
                try {
                    toSock.close();
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            } else {
                Sockets.close(toStream.getSocket());
            }
        }
    }
 
    public static final SocketSupplier HttpSupplier = pack -> {
        String line = Bytes.readLine(pack.getBuffer());
        if (line == null) {
            return null;
        }
        InetSocketAddress authority;
        try {
            authority = Sockets.parseEndpoint(
                    new URL(line.split(" ")[1])
                            .getAuthority());
        } catch (MalformedURLException ex) {
            throw SystemException.wrap(ex);
        }
        SocketPool.PooledSocket pooledSocket = App.retry(2,
                p -> SocketPool.Pool.borrowSocket(p),
                authority);
        return Tuple.of(pooledSocket, pooledSocket.socket);
    };
    private static final int DefaultBacklog = 128;
    private static final int DefaultConnectRetryCount = 4;
    private final ServerSocket server;
    private final List<ClientItem> clients;
    private volatile int connectRetryCount;
    private InetSocketAddress directAddress;
    private SocketSupplier directSupplier;
 
    @Override
    public boolean isClosed() {
        return !(!super.isClosed() && !server.isClosed());
    }
 
    public InetSocketAddress getLocalAddress() {
        return (InetSocketAddress) server.getLocalSocketAddress();
    }
 
    public NQuery<Tuple<Socket, Socket>> getClients() {
        return NQuery.of(clients).select(p -> Tuple.of(p.stream.getSocket(), p.toStream.getSocket()));
    }
 
    public int getConnectRetryCount() {
        return connectRetryCount;
    }
 
    public void setConnectRetryCount(int connectRetryCount) {
        if (connectRetryCount <= 0) {
            connectRetryCount = 1;
        }
        this.connectRetryCount = connectRetryCount;
    }
 
    public DirectSocket(int listenPort, InetSocketAddress directAddr) {
        this(new InetSocketAddress(Sockets.AnyAddress, listenPort), directAddr, null);
    }
 
    public DirectSocket(InetSocketAddress listenAddr, InetSocketAddress directAddr, SocketSupplier directSupplier) {
        require(listenAddr);
        require(this, directAddr != null || directSupplier != null);
 
        try {
            server = new ServerSocket();
            server.setReuseAddress(true);
            server.bind(listenAddr, DefaultBacklog);
        } catch (IOException ex) {
            throw new SocketException(listenAddr, ex);
        }
        directAddress = directAddr;
        this.directSupplier = directSupplier;
        clients = Collections.synchronizedList(new ArrayList<>());
        connectRetryCount = DefaultConnectRetryCount;
        String taskName = String.format("DirectSocket[%s->%s]", listenAddr, isNull(directAddress, "autoAddress"));
        LogWriter tracer = new LogWriter();
        tracer.setPrefix(taskName + " ");
        setTracer(tracer);
        AsyncTask.TaskFactory.run(() -> {
            getTracer().info("start..");
            while (!isClosed()) {
                try {
                    ClientItem client = new ClientItem(server.accept(), this);
                    clients.add(client);
                    onReceive(client, taskName);
                } catch (IOException ex) {
                    log.error(taskName, ex);
                }
            }
            close();
        }, taskName);
    }
 
    @Override
    protected void freeObjects() {
        try {
            for (ClientItem client : NQuery.of(clients)) {
                client.closeSocket();
            }
            clients.clear();
            server.close();
        } catch (IOException ex) {
            log.error("DirectSocket close", ex);
        }
        getTracer().info("stop..");
    }
 
    private void onReceive(ClientItem client, String taskName) {
        AsyncTask.TaskFactory.run(() -> {
            try {
                int recv = client.stream.directTo(client.toStream, (p1, p2) -> {
                    getTracer().info("sent %s bytes from %s to %s..", p2,
                            Sockets.getId(client.stream.getSocket(), true),
                            Sockets.getId(client.toStream.getSocket(), false));
                    return true;
                });
                getTracer().info("socket[%s->%s] closing with %s", Sockets.getId(client.stream.getSocket(), false),
                        Sockets.getId(client.stream.getSocket(), true), recv);
            } catch (SystemException ex) {
                $<java.net.SocketException> out = $();
                if (ex.tryGet(out, java.net.SocketException.class)) {
                    if (out.v.getMessage().contains("Socket closed")) {
                        //ignore
                        log.debug("DirectTo ignore socket closed");
                        return;
                    }
                }
                throw ex;
            } finally {
                client.closeSocket();
            }
        }, String.format("%s[networkStream]", taskName));
        AsyncTask.TaskFactory.run(() -> {
            int recv = NetworkStream.StreamEOF;
            try {
                recv = client.toStream.directTo(client.stream, (p1, p2) -> {
                    getTracer().info("recv %s bytes from %s to %s..", p2,
                            Sockets.getId(client.toStream.getSocket(), false),
                            Sockets.getId(client.stream.getSocket(), true));
                    return true;
                });
                getTracer().info("socket[%s->%s] closing with %s", Sockets.getId(client.toStream.getSocket(), false),
                        Sockets.getId(client.toStream.getSocket(), true), recv);
            } catch (SystemException ex) {
                $<java.net.SocketException> out = $();
                if (ex.tryGet(out, java.net.SocketException.class)) {
                    if (out.v.getMessage().contains("Socket closed")) {
                        //ignore
                        log.debug("DirectTo ignore socket closed");
                        return;
                    }
                }
                throw ex;
            } finally {
                client.closeToSocket(recv == NetworkStream.CannotWrite);
            }
        }, String.format("%s[toNetworkStream]", taskName));
    }
}

package org.rx.socks;
 
import lombok.extern.slf4j.Slf4j;
import org.rx.util.BytesSegment;
import org.rx.io.IOStream;
 
import java.io.IOException;
import java.net.Socket;
 
import static org.rx.core.Contract.require;
import static org.rx.socks.Sockets.shutdown;
 
@Slf4j
public final class NetworkStream extends IOStream {
    @FunctionalInterface
    public interface DirectPredicate {
        boolean test(BytesSegment buffer, int count);
    }
 
    public static final int SocketEOF = 0;
    public static final int StreamEOF = -1;
    public static final int CannotWrite = -2;
    private final boolean ownsSocket;
    private final Socket socket;
    private final BytesSegment segment;
 
    public boolean isConnected() {
        return !isClosed() && !socket.isClosed() && socket.isConnected();
    }
 
    @Override
    public boolean canRead() {
        return super.canRead() && checkSocket(socket, false);
    }
 
    @Override
    public boolean canWrite() {
        return super.canWrite() && checkSocket(socket, true);
    }
 
    private static boolean checkSocket(Socket sock, boolean isWrite) {
        return !sock.isClosed() && sock.isConnected() && !(isWrite ? sock.isOutputShutdown() : sock.isInputShutdown());
    }
 
    public Socket getSocket() {
        return socket;
    }
 
    public BytesSegment getSegment() {
        return segment;
    }
 
    public NetworkStream(Socket socket, BytesSegment segment) throws IOException {
        this(socket, segment, true);
    }
 
    public NetworkStream(Socket socket, BytesSegment segment, boolean ownsSocket) throws IOException {
        super(socket.getInputStream(), socket.getOutputStream());
 
        this.ownsSocket = ownsSocket;
        this.socket = socket;
        this.segment = segment;
    }
 
    @Override
    protected void freeObjects() {
        try {
            log.info("NetworkStream freeObjects ownsSocket={} socket[{}][closed={}]", ownsSocket,
                    Sockets.getId(socket, false), socket.isClosed());
            if (ownsSocket) {
                //super.freeObjects(); Ignore this!!
                Sockets.close(socket, 1);
            }
        } finally {
            segment.close();
        }
    }
 
    int readSegment() {
        return read(segment.array, segment.offset, segment.count);
    }
 
    void writeSegment(int count) {
        write(segment.array, segment.offset, count);
    }
 
    public int directTo(NetworkStream to, DirectPredicate onEach) {
        checkNotClosed();
        require(to);
 
        int recv = StreamEOF;
        while (canRead() && (recv = read(segment.array, segment.offset, segment.count)) >= -1) {
            if (recv <= 0) {
                if (ownsSocket) {
                    log.debug("DirectTo read {} flag and shutdown send", recv);
                    shutdown(socket, 1);
                }
                break;
            }
 
            if (!to.canWrite()) {
                log.debug("DirectTo read {} bytes and can't write", recv);
                recv = CannotWrite;
                break;
            }
            to.write(segment.array, segment.offset, recv);
 
            if (onEach != null && !onEach.test(segment, recv)) {
                recv = StreamEOF;
                break;
            }
        }
        if (to.canWrite()) {
            to.flush();
        }
        return recv;
    }
}

package org.rx.socks;
 
import org.rx.core.SystemException;
 
import java.net.InetSocketAddress;
 
public class SocketException extends SystemException {
    private InetSocketAddress localAddress;
 
    public InetSocketAddress getLocalAddress() {
        return localAddress;
    }
 
    public SocketException(InetSocketAddress localAddress, Exception ex) {
        super(ex);
        this.localAddress = localAddress;
    }
 
    public SocketException(InetSocketAddress localAddress, String msg) {
        super(msg);
        this.localAddress = localAddress;
    }
}

package org.rx.socks;
 
import java.io.IOException;
import java.net.*;
 
import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.ServerChannel;
import io.netty.channel.epoll.Epoll;
import io.netty.channel.epoll.EpollEventLoopGroup;
import io.netty.channel.epoll.EpollServerSocketChannel;
import io.netty.channel.epoll.EpollSocketChannel;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import org.rx.core.Strings;
import org.rx.core.SystemException;
import org.rx.core.WeakCache;
import org.springframework.util.CollectionUtils;
 
import java.util.List;
import java.util.Properties;
import java.util.function.Function;
 
import static org.rx.core.Contract.require;
import static org.rx.core.Contract.values;
 
public final class Sockets {
    public static final InetAddress LocalAddress, AnyAddress;
 
    static {
        LocalAddress = InetAddress.getLoopbackAddress();
        try {
            AnyAddress = InetAddress.getByName("0.0.0.0");
        } catch (Exception ex) {
            throw SystemException.wrap(ex);
        }
    }
 
    public InetAddress[] getAddresses(String host) {
        return (InetAddress[]) WeakCache.getOrStore("Sockets.getAddresses", values(host), p -> {
            try {
                return InetAddress.getAllByName(host);
            } catch (UnknownHostException ex) {
                throw SystemException.wrap(ex);
            }
        });
    }
 
    public static InetSocketAddress getAnyEndpoint(int port) {
        return new InetSocketAddress(AnyAddress, port);
    }
 
    public static InetSocketAddress parseEndpoint(String endpoint) {
        require(endpoint);
 
        String[] arr = Strings.split(endpoint, ":", 2);
        return new InetSocketAddress(arr[0], Integer.parseInt(arr[1]));
    }
 
    public static void writeAndFlush(Channel channel, Object... packs) {
        require(channel);
 
        channel.eventLoop().execute(() -> {
            for (Object pack : packs) {
                channel.write(pack);
            }
            channel.flush();
        });
    }
 
    public static EventLoopGroup bossEventLoop() {
        return eventLoopGroup(1);
    }
 
    public static EventLoopGroup workEventLoop() {
        return eventLoopGroup(0);
    }
 
    public static EventLoopGroup eventLoopGroup(int threadAmount) {
        return Epoll.isAvailable() ? new EpollEventLoopGroup(threadAmount) : new NioEventLoopGroup(threadAmount);  //NioEventLoopGroup(0, TaskFactory.getExecutor());
    }
 
    public static Bootstrap bootstrap() {
        return bootstrap(getChannelClass());
    }
 
    public static Bootstrap bootstrap(Class<? extends Channel> channelClass) {
        require(channelClass);
 
        return new Bootstrap().group(channelClass.getName().startsWith("Epoll") ? new EpollEventLoopGroup() : new NioEventLoopGroup()).channel(channelClass);
    }
 
    public static Bootstrap bootstrap(Channel channel) {
        require(channel);
 
        return new Bootstrap().group(channel.eventLoop()).channel(channel.getClass());
    }
 
    public static Class<? extends ServerChannel> getServerChannelClass() {
        return Epoll.isAvailable() ? EpollServerSocketChannel.class : NioServerSocketChannel.class;
    }
 
    public static Class<? extends Channel> getChannelClass() {
        return Epoll.isAvailable() ? EpollSocketChannel.class : NioSocketChannel.class;
    }
 
    public static void closeOnFlushed(Channel channel) {
        require(channel);
 
        if (!channel.isActive()) {
            return;
        }
        channel.writeAndFlush(Unpooled.EMPTY_BUFFER).addListener(ChannelFutureListener.CLOSE);
    }
 
    public static void close(Socket socket) {
        close(socket, 1 | 2);
    }
 
    public static void close(Socket socket, int flags) {
        require(socket);
 
        if (!socket.isClosed()) {
            shutdown(socket, flags);
            try {
                socket.setSoLinger(true, 2);
                socket.close();
            } catch (IOException ex) {
                throw SystemException.wrap(ex);
            }
        }
    }
 
    /**
     * @param socket
     * @param flags  Send=1, Receive=2
     */
    public static void shutdown(Socket socket, int flags) {
        require(socket);
 
        if (!socket.isClosed() && socket.isConnected()) {
            try {
                if ((flags & 1) == 1 && !socket.isOutputShutdown()) {
                    socket.shutdownOutput();
                }
                if ((flags & 2) == 2 && !socket.isInputShutdown()) {
                    socket.shutdownInput();
                }
            } catch (IOException ex) {
                throw SystemException.wrap(ex);
            }
        }
    }
 
    public static String getId(Socket sock, boolean isRemote) {
        require(sock);
 
        InetSocketAddress addr = (InetSocketAddress) (isRemote ? sock.getRemoteSocketAddress()
                : sock.getLocalSocketAddress());
        return addr.getHostString() + ":" + addr.getPort();
    }
 
    public static <T> T httpProxyInvoke(String proxyAddr, Function<String, T> func) {
        setHttpProxy(proxyAddr);
        try {
            return func.apply(proxyAddr);
        } finally {
            clearHttpProxy();
        }
    }
 
    public static void setHttpProxy(String proxyAddr) {
        setHttpProxy(proxyAddr, null, null, null);
    }
 
    public static void setHttpProxy(String proxyAddr, List<String> nonProxyHosts, String userName, String password) {
        InetSocketAddress ipe = parseEndpoint(proxyAddr);
        Properties prop = System.getProperties();
        prop.setProperty("http.proxyHost", ipe.getAddress().getHostAddress());
        prop.setProperty("http.proxyPort", String.valueOf(ipe.getPort()));
        prop.setProperty("https.proxyHost", ipe.getAddress().getHostAddress());
        prop.setProperty("https.proxyPort", String.valueOf(ipe.getPort()));
        if (!CollectionUtils.isEmpty(nonProxyHosts)) {
            //如"localhost|192.168.0.*"
            prop.setProperty("http.nonProxyHosts", String.join("|", nonProxyHosts));
        }
        if (userName != null && password != null) {
            Authenticator.setDefault(new UserAuthenticator(userName, password));
        }
    }
 
    public static void clearHttpProxy() {
        System.clearProperty("http.proxyHost");
        System.clearProperty("http.proxyPort");
        System.clearProperty("https.proxyHost");
        System.clearProperty("https.proxyPort");
        System.clearProperty("http.nonProxyHosts");
    }
 
    static class UserAuthenticator extends Authenticator {
        private String userName;
        private String password;
 
        public UserAuthenticator(String userName, String password) {
            this.userName = userName;
            this.password = password;
        }
 
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(userName, password.toCharArray());
        }
    }
}