SSLPoke should support Proxy - giving the solution in the comments

[kunalgithub]

SSLPoke should support proxy

Here i am creating version of SSLPoke with proxy

import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import java.io.*;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.Socket;
import java.util.Arrays;
import java.util.Optional;
import java.util.regex.Pattern;

/**
 * Establish a SSL connection to a host and port, writes a byte and
 * prints the response. See
 * http://confluence.atlassian.com/display/JIRA/Connecting+to+SSL+services
 */
public class SSLPoke {

    private static final Pattern PATTERN = Pattern.compile(
            "^(([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.){3}([01]?\\d\\d?|2[0-4]\\d|25[0-5])$");

    public static void main(String[] args) throws IOException {
        if (args.length < 2) {
            System.out.println("Usage: " + SSLPoke.class.getName() + " <host> <port>");
            System.out.println("Usage: Additionally Supply Proxy : " + SSLPoke.class.getName() + "" +
                    "<host> <port> --proxy=proxyHost:proxyPort");
            System.exit(1);
        }

        InetSocketAddress inetSocketAddress = getProxy(args);
        boolean proxyEnabled = inetSocketAddress != null;
        Socket socket = null;

        if (proxyEnabled) {
            Proxy proxy = new Proxy(Proxy.Type.HTTP,inetSocketAddress);
            socket = new Socket(proxy);
            InetSocketAddress address = new InetSocketAddress(args[0], 443);
            socket.connect(address);
        }

        try {
            SSLSocketFactory sslsocketfactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
            SSLSocket sslsocket = null;
            if (proxyEnabled) {
                sslsocket = (SSLSocket) sslsocketfactory.createSocket(socket, args[0], Integer.parseInt(args[1]),
                        true);
            } else {
                sslsocket = (SSLSocket) sslsocketfactory.createSocket(args[0], Integer.parseInt(args[1]));
            }
            InputStream in = sslsocket.getInputStream();
            OutputStream out = sslsocket.getOutputStream();
            out.write(1);
            while (in.available() > 0) {
                System.out.print(in.read());
            }
            System.out.println("Successfully connected");

        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

    public static InetSocketAddress getProxy(String[] args) {
        Optional<String> optProxy = Arrays.stream(args).filter(arg -> arg.startsWith("--proxy")).findFirst();
        if (optProxy.isPresent() && optProxy.get().split("=").length > 1 &&
                optProxy.get().split("=")[1].split(":").length > 1) {
            String[] proxy = optProxy.get().split("=")[1].split(":");
            try {
                if (!validate(proxy[0])) {
                    System.out.println("Not a valid IP");
                    System.exit(1);
                }
                return new InetSocketAddress(proxy[0], Integer.valueOf(proxy[1]));
            } catch (Throwable e) {
                System.out.println("PROXY FORMAT --proxy=IP:PORT");
                e.printStackTrace();
                System.exit(1);
            }
        }
        System.out.println("PROXY NOT PROVIDED");
        return null;
    }

    public static boolean hasProxyFlag(String[] args) {
        Optional<String> optProxy = Arrays.stream(args).filter(arg -> arg.startsWith("--proxy")).findFirst();
        return optProxy.isPresent();
    }

    public static boolean validate(final String ip) {
        return PATTERN.matcher(ip).matches();
    }
}

[MichalHecko]

Thank you a lot. I will do a review and merge your changes later. My old code needs a little polish