encode response with gzip

Bench4Q-Recorder/src/main/java/org/bench4q/recorder/httpcapture/generator/ContentEncoder.java

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+package org.bench4q.recorder.httpcapture.generator;
+
+import org.apache.log4j.Logger;
+
+public class ContentEncoder {
+	protected Logger logger = Logger.getLogger(ContentEncoder.class);
+	protected ContentEncoder() {
+	}
+
+	public static ContentEncoder createEncoder(String encodeType) {
+		if (encodeType == null) {
+			return new ContentEncoder();
+		}
+
+		if (encodeType.equalsIgnoreCase("gzip")) {
+			return new GzipEncoder();
+		} else {
+			return new ContentEncoder();
+		}
+	}
+	
+	public byte[] encoderContent(byte[] content){
+		return content;
+	}
+}

Bench4Q-Recorder/src/main/java/org/bench4q/recorder/httpcapture/generator/GzipEncoder.java

@@ -0,0 +1,25 @@
+package org.bench4q.recorder.httpcapture.generator;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.zip.GZIPOutputStream;
+
+public class GzipEncoder extends ContentEncoder{
+
+	public byte[] encoderContent(byte[] content){
+		try {
+			ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+			GZIPOutputStream gzipOutputStream = new GZIPOutputStream(outputStream);
+			
+			gzipOutputStream.write(content, 0, content.length);
+			gzipOutputStream.finish();  
+			  
+			gzipOutputStream.flush();  
+			gzipOutputStream.close(); 
+			return outputStream.toByteArray();
+		} catch (IOException e) {
+			logger.error("decodeContent", e);
+			return null;
+		}
+	}
+}