HttpsUtility

//2012-06-15 johnpfeiffer

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.cert.Certificate;
import java.security.cert.CertificateEncodingException;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLPeerUnverifiedException;
import javax.security.cert.CertificateException;
import javax.security.cert.X509Certificate;

public class HttpsUtility
{

    protected static String getHTTPSConnectionInfo( HttpsURLConnection connection )
    {
        StringBuilder strb = new StringBuilder();
        String newline = System.getProperty( "line.separator" );

        try
        {
            strb.append( "Response Code : " + connection.getResponseCode() + newline );
        }catch( IOException e )
        {
            strb.append( "ERROR: " + e.getMessage() + newline );
        }
        strb.append( "Cipher Suite : " + connection.getCipherSuite() + newline );

        Certificate[] certs = null;
        try
        {
            certs = connection.getServerCertificates();
        }catch( SSLPeerUnverifiedException e )
        {
            strb.append( "ERROR: " + e.getMessage() + newline );
        }

        for( Certificate cert : certs )
        {
            strb.append( "Cert Type : " + cert.getType() + newline );
            strb.append( "Cert Hash Code : " + cert.hashCode() + newline );
            strb.append( "Cert Public Key Algorithm : " + cert.getPublicKey().getAlgorithm() + newline );
            strb.append( "Cert Public Key Format : " + cert.getPublicKey().getFormat() + newline );
            if( cert.getType().equals( "X.509" ) )
            {
                try
                {
                    byte[] encoded = cert.getEncoded();
                    X509Certificate x509cert = X509Certificate.getInstance( encoded );
                    strb.append( x509cert.getSubjectDN() );
                }catch( CertificateEncodingException e )
                {
                    strb.append( "ERROR: encoding: " + e.getMessage() );
                }catch( CertificateException e )
                {
                    strb.append( "ERROR: certificate: " + e.getMessage() );
                }
            }
        }

        return strb.toString();
    }

    protected static String getHTTPSConnectionContent( HttpsURLConnection connection )
    {
        StringBuilder strb = new StringBuilder();
//      String newline = System.getProperty( "line.separator" );
        BufferedReader br = null;
        try{
            connection.connect();
            InputStream response = connection.getInputStream();
            br = new BufferedReader( new InputStreamReader( response ) );
            String input;
            while( ( input = br.readLine() ) != null )
            {
                System.out.println( input );
            }
            br.close();
        }catch( IOException ioe )
        {
            strb.append( ioe.toString() );
        }
        return strb.toString();
    }

} //end class