Decoding with base-64 and un-GZIP-ing the encoded string

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.zip.GZIPInputStream;

import org.apache.commons.codec.binary.Base64;

public static String decodeBase64AndUnGzip(String inputStr) 

    throws IOException {

     int BUFFER_SIZE = 4096;

     byte[] buffer = new byte[BUFFER_SIZE];

        

     // decode the input string using base 64

     byte[] decodedStr = Base64.decodeBase64(inputStr);

     // Get the GZIP input stream

     InputStream input = new GZIPInputStream( 

                          new ByteArrayInputStream(decodedStr) );

     // Make a byte array in memory

     ByteArrayOutputStream output = new ByteArrayOutputStream();

     // Read the un-GZIPed contents and
     // write to byte array stream using buffer

     int n = input.read(buffer, 0, BUFFER_SIZE);

     while (n >= 0) {

         output.write(buffer, 0, n);

         n = input.read(buffer, 0, BUFFER_SIZE);

     }

     // make a byte array from byte array stream

     byte[] strOut = output.toByteArray();

        

     // close the streams

     output.close();

     input.close();

        

     return new String(strOut);

}