Quelle HttpProxy.java Sprache: JAVA

/*
* Copyright (c) 2010, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

/*
* @test
* @bug 6370908 8220663
* @library /test/lib
* @summary Add support for HTTP_CONNECT proxy in Socket class.
* This test uses the wildcard address and is susceptible to fail intermittently.
* @key intermittent
* @run main HttpProxy
* @run main/othervm -Djava.net.preferIPv4Stack=true HttpProxy
* @run main/othervm -Djava.net.preferIPv6Addresses=true HttpProxy
*/

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketAddress;
import java.util.ArrayList;
import java.util.List;

import static java.lang.System.out;
import jdk.test.lib.net.HttpHeaderParser;
import jdk.test.lib.net.IPSupport;

public class HttpProxy {
    final String proxyHost;
    final int proxyPort;
    static final int SO_TIMEOUT = 15000;

    public static void main(String[] args) throws Exception {
        IPSupport.throwSkippedExceptionIfNonOperational();

        String host;
        int port;
        ConnectProxyTunnelServer proxy = null;
        if (args.length == 0) {
            // Start internal proxy
            proxy = new ConnectProxyTunnelServer();
            proxy.start();
            host = InetAddress.getLoopbackAddress().getHostAddress();
            port = proxy.getLocalPort();
            out.println("Running with internal proxy: " + host + ":" + port);
        } else if (args.length == 2) {
            host = args[0];
            port = Integer.valueOf(args[1]);
            out.println("Running against specified proxy server: " + host + ":" + port);
        } else {
            System.err.println("Usage: java HttpProxy [ ]");
            return;
        }

        try {
            HttpProxy p = new HttpProxy(host, port);
            p.test();
        } finally {
            if (proxy != null)
                proxy.close();
        }
    }

    public HttpProxy(String proxyHost, int proxyPort) {
        this.proxyHost = proxyHost;
        this.proxyPort = proxyPort;
    }

    static boolean canUseIPv6() {
        return IPSupport.hasIPv6() && !IPSupport.preferIPv4Stack();
    }

    void test() throws Exception {
        InetSocketAddress proxyAddress = new InetSocketAddress(proxyHost, proxyPort);
        Proxy httpProxy = new Proxy(Proxy.Type.HTTP, proxyAddress);

        // Wildcard address is needed here
        try (ServerSocket ss = new ServerSocket(0)) {
            List<InetSocketAddress> externalAddresses = new ArrayList<>();
            externalAddresses.add(
                new InetSocketAddress(InetAddress.getLocalHost(), ss.getLocalPort()));

            if (canUseIPv6()) {
                byte[] bytes = new byte[] {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
                var address = InetAddress.getByAddress(bytes);
                externalAddresses.add(
                        new InetSocketAddress(address, ss.getLocalPort()));
            }

            for (SocketAddress externalAddress : externalAddresses) {
                try (Socket sock = new Socket(httpProxy)) {
                    sock.setSoTimeout(SO_TIMEOUT);
                    sock.setTcpNoDelay(false);

                    out.println("Trying to connect to server socket on " + externalAddress);
                    sock.connect(externalAddress);
                    try (Socket externalSock = ss.accept()) {
                        // perform some simple checks
                        check(sock.isBound(), "Socket is not bound");
                        check(sock.isConnected(), "Socket is not connected");
                        check(!sock.isClosed(), "Socket should not be closed");
                        check(sock.getSoTimeout() == SO_TIMEOUT,
                                "Socket should have a previously set timeout");
                        check(sock.getTcpNoDelay() == false, "NODELAY should be false");

                        simpleDataExchange(sock, externalSock);
                    }
                }
            }
        }
    }

    static void check(boolean condition, String message) {
        if (!condition) out.println(message);
    }

    static Exception unexpected(Exception e) {
        out.println("Unexpected Exception: " + e);
        e.printStackTrace();
        return e;
    }

    // performs a simple exchange of data between the two sockets
    // and throws an exception if there is any problem.
    void simpleDataExchange(Socket s1, Socket s2) throws Exception {
        try (final InputStream i1 = s1.getInputStream();
             final InputStream i2 = s2.getInputStream();
             final OutputStream o1 = s1.getOutputStream();
             final OutputStream o2 = s2.getOutputStream()) {
            startSimpleWriter("simpleWriter1", o1, 100);
            startSimpleWriter("simpleWriter2", o2, 200);
            simpleRead(i2, 100);
            simpleRead(i1, 200);
        }
    }

    void startSimpleWriter(String threadName, final OutputStream os, final int start) {
        (new Thread(new Runnable() {
            public void run() {
                try { simpleWrite(os, start); }
                catch (Exception e) {unexpected(e); }
                finally { out.println(threadName + ": done"); }
            }}, threadName)).start();
    }

    void simpleWrite(OutputStream os, int start) throws Exception {
        byte b[] = new byte[2];
        for (int i=start; i<start+100; i++) {
            b[0] = (byte) (i / 256);
            b[1] = (byte) (i % 256);
            os.write(b);
        }
        out.println("Wrote " + start + " -> " + (start + 100));
    }

    void simpleRead(InputStream is, int start) throws Exception {
        byte b[] = new byte [2];
        for (int i=start; i<start+100; i++) {
            int x = is.read(b);
            if (x == 1)
                x += is.read(b,1,1);
            if (x!=2)
                throw new Exception("read error");
            int r = bytes(b[0], b[1]);
            if (r != i)
                throw new Exception("read " + r + " expected " +i);
        }
        out.println("Read " + start + " -> " + (start + 100));
    }

    int bytes(byte b1, byte b2) {
        int i1 = (int)b1 & 0xFF;
        int i2 = (int)b2 & 0xFF;
        return i1 * 256 + i2;
    }

    static class ConnectProxyTunnelServer extends Thread implements AutoCloseable {

        private final ServerSocket ss;
        private volatile boolean closed;

        public ConnectProxyTunnelServer() throws IOException {
            ss = new ServerSocket(0, 0, InetAddress.getLoopbackAddress());
        }

        @Override
        public void run() {
            try {
                while (!closed) {
                    try (Socket clientSocket = ss.accept()) {
                        processRequest(clientSocket);
                    }
                }
            } catch (Exception e) {
                if (!closed) {
                    out.println("Proxy Failed: " + e);
                    e.printStackTrace();
                }
            } finally {
                if (!closed)
                    try { ss.close(); } catch (IOException x) { unexpected(x); }
            }
        }

        /**
         * Returns the port on which the proxy is accepting connections.
         */
        public int getLocalPort() {
            return ss.getLocalPort();
        }

        @Override
        public void close() throws Exception {
            closed = true;
            ss.close();
        }

        /*
         * Processes the CONNECT request
         */
        private void processRequest(Socket clientSocket) throws Exception {
            HttpHeaderParser mheader = new HttpHeaderParser(clientSocket.getInputStream());
            String statusLine = mheader.getRequestDetails();

            if (!statusLine.startsWith("CONNECT")) {
                out.println("proxy server: processes only "
                                  + "CONNECT method requests, received: "
                                  + statusLine);
                return;
            }

            // retrieve the host and port info from the status-line
            InetSocketAddress serverAddr = getConnectInfo(statusLine);
            out.println("Proxy serving CONNECT request to " + serverAddr);

            //open socket to the server
            try (Socket serverSocket = new Socket(serverAddr.getAddress(),
                                                  serverAddr.getPort())) {
                Forwarder clientFW = new Forwarder(clientSocket.getInputStream(),
                                                   serverSocket.getOutputStream());
                Thread clientForwarderThread = new Thread(clientFW, "ClientForwarder");
                clientForwarderThread.start();
                send200(clientSocket);
                Forwarder serverFW = new Forwarder(serverSocket.getInputStream(),
                                                   clientSocket.getOutputStream());
                serverFW.run();
                clientForwarderThread.join();
            }
        }

        private void send200(Socket clientSocket) throws IOException {
            OutputStream out = clientSocket.getOutputStream();
            PrintWriter pout = new PrintWriter(out);

            pout.println("HTTP/1.1 200 OK");
            pout.println();
            pout.flush();
        }

        /*
         * This method retrieves the hostname and port of the tunnel destination
         * from the request line.
         * @param connectStr
         *        of the form: <i>CONNECT server-name:server-port HTTP/1.x</i>
         */
        static InetSocketAddress getConnectInfo(String connectStr)
            throws Exception
        {
            try {
                int starti = connectStr.indexOf(' ');
                int endi = connectStr.lastIndexOf(' ');
                String connectInfo = connectStr.substring(starti+1, endi).trim();
                // retrieve server name and port
                endi = connectInfo.lastIndexOf(':');
                String name = connectInfo.substring(0, endi);

                if (name.contains(":")) {
                    if (!(name.startsWith("[") && name.endsWith("]"))) {
                        throw new IOException("Invalid host:" + name);
                    }
                    name = name.substring(1, name.length() - 1);
                }
                int port = Integer.parseInt(connectInfo.substring(endi+1));
                return new InetSocketAddress(name, port);
            } catch (Exception e) {
                out.println("Proxy received a request: " + connectStr);
                throw unexpected(e);
            }
        }
    }

    /* Reads from the given InputStream and writes to the given OutputStream */
    static class Forwarder implements Runnable
    {
        private final InputStream in;
        private final OutputStream os;

        Forwarder(InputStream in, OutputStream os) {
            this.in = in;
            this.os = os;
        }

        @Override
        public void run() {
            try {
                byte[] ba = new byte[1024];
                int count;
                while ((count = in.read(ba)) != -1) {
                    os.write(ba, 0, count);
                }
            } catch (IOException e) {
                unexpected(e);
            }
        }
    }
}

quality91%

¤ Dauer der Verarbeitung: 0.14 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.