HTTPSClient

HttpsClient.java

import java.net.MalformedURLException;
import java.net.URL;
import java.security.cert.Certificate;
import java.io.*;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLPeerUnverifiedException;

public class HttpsClient {

  public static void main(String[] args) {
    if (args.length != 1) {
      System.out.println("Usage: "+ HttpsClient.class.getName()+" <url>");
      System.exit(1);
    }
    new HttpsClient().doGet(args[0]);
  }

  private void doGet(String https_url){
    URL url;
    try {

      url = new URL(https_url);
      HttpsURLConnection con = (HttpsURLConnection) url.openConnection();

      // dumpl all cert info
      print_https_cert(con);

      // dump all the content
      print_content(con);

    } catch (MalformedURLException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }

  }

  private void print_https_cert(HttpsURLConnection con){
    if( con != null){
      try {
        System.out.println("Response Code : " + con.getResponseCode());
        System.out.println("Cipher Suite : " + con.getCipherSuite());
        System.out.println("\n");

        Certificate[] certs = con.getServerCertificates();
        for(Certificate cert : certs){
          System.out.println("Cert Type : " + cert.getType());
          System.out.println("Cert Hash Code : " + cert.hashCode());
          System.out.println("Cert Public Key Algorithm : " + cert.getPublicKey().getAlgorithm());
          System.out.println("Cert Public Key Format : " + cert.getPublicKey().getFormat());
          System.out.println("\n");
        }
      } catch (SSLPeerUnverifiedException e) {
        e.printStackTrace();
      } catch (IOException e){
        e.printStackTrace();
      }

    }

  }

  private void print_content(HttpsURLConnection con){
    if(con != null){
      try {
        System.out.println("****** Content of the URL ********");
        BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream()));

        String input;

        while ((input = br.readLine()) != null){
          System.out.println(input);
        }
        br.close();

      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  }

}