Appendix G: Payload Compression Example

The purpose of this section is to provide an example of the code required to compress and encode a payload, where the payload is then passed as the contents of the Payload/Compressed element. The following is a Java example that leverages commonly used classes for compression and base64 encoding.

package BusinessService.TS.WebServiceClient.CompressionClient;

import java.util.*;
import java.io.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.util.zip.*;
import org.apache.soap.encoding.soapenc.Base64;

public class CompressionClientCompressandEncode{
    protected byte[] input = null;
    protected String base64GzipInput = "";
    public byte[] getinput() {
        return input;
    }
    public void setinput(byte[] val) {
        input = val;
    }
    public String getbase64GzipInput() {
        return base64GzipInput;
    }
    public void setbase64GzipInput(String val) {
        base64GzipInput = val;
    }
    public CompressionClientCompressandEncode() {
    }
    public void invoke() throws Exception {
        In  : byte[] input
        Out : String base64GzipInput

        ByteArrayOutputStream bas = new ByteArrayOutputStream();
        GZIPOutputStream bis = new GZIPOutputStream(bas);
        bis.write(input);

            bis.close();   
            base64GzipInput = Base64.encode(bas.toByteArray());
    }
}