Java Code Examples for com.runjva.sourceforge.jsocks.protocol.Socks5Proxy#getPort()

/**
 * Make an HTTP Get request routed over socks5 proxy.
 */
private String requestWithGETProxy(String param, Socks5Proxy socks5Proxy, @Nullable String headerKey, @Nullable String headerValue) throws IOException {
    log.debug("requestWithGETProxy param=" + param);
    // This code is adapted from:
    //  http://stackoverflow.com/a/25203021/5616248

    // Register our own SocketFactories to override createSocket() and connectSocket().
    // connectSocket does NOT resolve hostname before passing it to proxy.
    Registry<ConnectionSocketFactory> reg = RegistryBuilder.<ConnectionSocketFactory>create()
            .register("http", new SocksConnectionSocketFactory())
            .register("https", new SocksSSLConnectionSocketFactory(SSLContexts.createSystemDefault())).build();

    // Use FakeDNSResolver if not resolving DNS locally.
    // This prevents a local DNS lookup (which would be ignored anyway)
    PoolingHttpClientConnectionManager cm = socks5Proxy.resolveAddrLocally() ?
            new PoolingHttpClientConnectionManager(reg) :
            new PoolingHttpClientConnectionManager(reg, new FakeDnsResolver());
    try (CloseableHttpClient httpclient = HttpClients.custom().setConnectionManager(cm).build()) {
        InetSocketAddress socksAddress = new InetSocketAddress(socks5Proxy.getInetAddress(), socks5Proxy.getPort());

        // remove me: Use this to test with system-wide Tor proxy, or change port for another proxy.
        // InetSocketAddress socksAddress = new InetSocketAddress("127.0.0.1", 9050);

        HttpClientContext context = HttpClientContext.create();
        context.setAttribute("socks.address", socksAddress);

        HttpGet request = new HttpGet(baseUrl + param);
        if (headerKey != null && headerValue != null)
            request.setHeader(headerKey, headerValue);

        log.debug("Executing request " + request + " proxy: " + socksAddress);
        try (CloseableHttpResponse response = httpclient.execute(request, context)) {
            return convertInputStreamToString(response.getEntity().getContent());
        }
    } catch (Throwable t) {
        throw new IOException("Error at requestWithGETProxy with URL: " + (baseUrl + param) + ". Throwable=" + t.getMessage());
    }
}
 

/**
 * Performs DNS lookup and returns a single InetAddress
 */
public static InetAddress lookup(Socks5Proxy proxy, String host) throws DnsLookupException {
    try {
        // note:  This is creating a new connection to our proxy, without any authentication.
        //        This works fine when connecting to bisq's internal Tor proxy, but
        //        would fail if user has configured an external proxy that requires auth.
        //        It would be much better to use the already connected proxy socket, but when I
        //        tried that I get weird errors and the lookup fails.
        //
        //        So this is an area for future improvement.
        Socket proxySocket = new Socket(proxy.getInetAddress(), proxy.getPort());

        proxySocket.getOutputStream().write(new byte[]{b('\u0005'), b('\u0001'), b('\u0000')});
        byte[] buf = new byte[2];
        //noinspection ResultOfMethodCallIgnored
        proxySocket.getInputStream().read(buf);

        if (buf[0] != b('\u0005')) {
            throw new DnsLookupException("Invalid Proxy Response");
        }
        if (buf[1] != b('\u0000')) {
            throw new DnsLookupException("Unrecognized Tor Auth Method");
        }

        byte[] hostBytes = host.getBytes(Charsets.UTF_8);
        buf = new byte[7 + hostBytes.length];
        buf[0] = b('\u0005');               // version SOCKS5
        buf[1] = b('\u00f0');               // CMD_RESOLVE
        buf[2] = b('\u0000');               // (reserved)
        buf[3] = b('\u0003');               // SOCKS5_ATYPE_HOSTNAME
        buf[4] = (byte) hostBytes.length;
        System.arraycopy(hostBytes, 0, buf, 5, hostBytes.length);
        buf[5 + hostBytes.length] = 0;

        proxySocket.getOutputStream().write(buf);

        buf = new byte[4];
        //noinspection UnusedAssignment
        int bytesRead = proxySocket.getInputStream().read(buf);

        // TODO: Should not be a length check here as well?
       /* if (bytesRead != 4)
            throw new DnsLookupException("Invalid Tor Address Response");*/


        if (buf[0] != b('\u0005'))
            throw new DnsLookupException("Invalid Tor Proxy Response");

        if (buf[1] != b('\u0000')) {
            if (!torStatusErrors.containsKey(buf[1])) {
                throw new DnsLookupException("Invalid Tor Proxy Response");
            }
            throw new DnsLookupException(torStatusErrors.get(buf[1]) + "(host=" + host + ")");
        }

        final char SOCKS5_ATYPE_IPV4 = '\u0001';
        final char SOCKS5_ATYPE_IPV6 = '\u0004';
        final byte atype = buf[3];
        if (atype != b(SOCKS5_ATYPE_IPV4) && atype != b(SOCKS5_ATYPE_IPV6))
            throw new DnsLookupException(torStatusErrors.get(b('\u0001')) + "(host=" + host + ")");

        final int octets = (atype == SOCKS5_ATYPE_IPV4 ? 4 : 16);
        buf = new byte[octets];
        bytesRead = proxySocket.getInputStream().read(buf);
        if (bytesRead != octets)
            throw new DnsLookupException("Invalid Tor Address Response");

        return InetAddress.getByAddress(buf);
    } catch (IOException | DnsLookupException e) {
        log.warn("Error resolving " + host + ". Exception:\n" + e.toString());
        throw new DnsLookupException(e);
    }
}