packet delimiter const introduced

src/main/java/com/corundumstudio/socketio/parser/Decoder.java

@@ -32,12 +32,12 @@ public class Decoder {
 	
 	public List<Packet> decodePayload(String data) throws IOException {
 		List<Packet> result = new ArrayList<Packet>();
-		if (data.charAt(0) == '\ufffd') {
+		if (data.charAt(0) == Packet.DELIMITER) {
 			// TODO optimize
 			for (int i = 1; i < data.length(); i++) {
 				String length = "";
-				if (data.charAt(i) == '\ufffd') {
-					String packetStr = data.substring(i + 1).substring(0, Integer.valueOf(length));
+				if (data.charAt(i) == Packet.DELIMITER) {
+					String packetStr = data.substring(i + 1, Integer.valueOf(length));
 					Packet packet = decodePacket(packetStr);
 					result.add(packet);
 					i += Integer.valueOf(length) + 1;

src/main/java/com/corundumstudio/socketio/parser/Encoder.java

@@ -31,7 +31,7 @@ public class Encoder {
 		}
 		StringBuilder result = new StringBuilder();
 		for (String packet : packets) {
-			result.append('\ufffd').append(packet.length()).append('\ufffd').append(packet);
+			result.append(Packet.DELIMITER).append(packet.length()).append(Packet.DELIMITER).append(packet);
 		}
 		return result;
 	}

src/main/java/com/corundumstudio/socketio/parser/Packet.java

@@ -14,6 +14,7 @@ import java.util.List;
 
 public class Packet {
 
+	public static final char DELIMITER = '\ufffd';
 	public static final Packet NULL_INSTANCE = new Packet(null);
 	
 	private final PacketType type;