Burp中的currentPayload和originalPayload

/**
     * This method is invoked by Burp each time the processor should be applied
     * to an Intruder payload.
     *
     * @param currentPayload The value of the payload to be processed.
     * @param originalPayload The value of the original payload prior to
     * processing by any already-applied processing rules.
     * 
     * @param baseValue The base value of the payload position, which will be
     * replaced with the current payload.
     * @return The value of the processed payload. This may be
     * null to indicate that the current payload should be skipped,
     * and the attack will move directly to the next payload.
     */
    byte[] processPayload(
            byte[] currentPayload,
            byte[] originalPayload,
            byte[] baseValue);

package burp;

import java.io.PrintWriter;

public class BurpExtender implements IBurpExtender,IIntruderPayloadProcessor {

	private IExtensionHelpers helper;
	private IBurpExtenderCallbacks callbacks;
	private PrintWriter stdout;
	private PrintWriter stderr;

	@Override
	public void registerExtenderCallbacks(IBurpExtenderCallbacks callbacks) {
		this.helper = callbacks.getHelpers();
		this.callbacks = callbacks;
		this.stdout = new PrintWriter(callbacks.getStdout(),true);
		callbacks.setExtensionName("intruder-payload-1");
		callbacks.registerIntruderPayloadProcessor(this);
	}

	@Override
	public String getProcessorName() {
		return "Processor1";
	}

	@Override
	public byte[] processPayload(byte[] currentPayload, byte[] originalPayload, byte[] baseValue) {
		stdout.println(getProcessorName());
		stdout.println("currentPayload:"+helper.bytesToString(currentPayload));
		stdout.println("originalPayload:"+helper.bytesToString(originalPayload));
		stdout.println("-------------------------");
		
		String newPayload;
		newPayload = helper.bytesToString(currentPayload) + "1";
		return helper.stringToBytes(newPayload);
	}	
}

package burp;

import java.io.PrintWriter;

public class BurpExtender implements IBurpExtender,IIntruderPayloadProcessor {

	private IExtensionHelpers helper;
	private IBurpExtenderCallbacks callbacks;
	private PrintWriter stdout;
	private PrintWriter stderr;

	@Override
	public void registerExtenderCallbacks(IBurpExtenderCallbacks callbacks) {
		this.helper = callbacks.getHelpers();
		this.callbacks = callbacks;
		this.stdout = new PrintWriter(callbacks.getStdout(),true);
		callbacks.setExtensionName("intruder-payload-2");
		callbacks.registerIntruderPayloadProcessor(this);
	}

	@Override
	public String getProcessorName() {
		return "Processor2";
	}

	@Override
	public byte[] processPayload(byte[] currentPayload, byte[] originalPayload, byte[] baseValue) {
		// TODO Auto-generated method stub
		stdout.println(getProcessorName());
		stdout.println("currentPayload:"+helper.bytesToString(currentPayload));
		stdout.println("originalPayload:"+helper.bytesToString(originalPayload));
		stdout.println("-------------------------");
		
		String newPayload;
		newPayload = helper.bytesToString(currentPayload) + "2";
		return helper.stringToBytes(newPayload);
	}	
}