public static int getExpectReceiveLength(byte[] receiveData)
{
int expectReceiveLength = 0;
TransferInputStream fis = new TransferInputStream(receiveData);
if (TransferUtil.isCompress(fis.readByte()))
{
fis.readInt();//uncompresslength
expectReceiveLength = TransferUtil.getLengthOfByte() + TransferUtil.getLengthOfInt() + TransferUtil.getLengthOfInt() + fis.readInt();
}
else
{
expectReceiveLength = TransferUtil.getLengthOfByte() + TransferUtil.getLengthOfInt() + fis.readInt();
}
return(expectReceiveLength);
}
private static byte[] getOutputByCompress(byte[] toByteArray)
{
int unCompressedLength = 0;
int compressedLength = 0;
byte[] input = toByteArray;
unCompressedLength = input.Length;
MemoryStream memoryStream = new MemoryStream();
Deflater compressor = new Deflater();
DeflaterOutputStream defos = new DeflaterOutputStream(memoryStream, compressor);
defos.Write(input, 0, input.Length);
defos.Flush();
defos.Finish();
byte[] output = memoryStream.ToArray();
compressedLength = output.Length;
memoryStream.Close();
defos.Close();
//set compress flag and compressedLength, unCompressedLength
byte[] sendData = new byte[output.Length + TransferUtil.getLengthOfByte() + TransferUtil.getLengthOfInt() + TransferUtil.getLengthOfInt()];
sendData[0] = TransferObject.COMPRESS_FLAG; //0:normal; 1:compress
TransferOutputStream fos = new TransferOutputStream(sendData);
fos.skipAByte();
fos.writeInt(unCompressedLength);
fos.writeInt(compressedLength);
Array.Copy(output, 0, sendData, TransferUtil.getLengthOfByte() + TransferUtil.getLengthOfInt() + TransferUtil.getLengthOfInt(), output.Length);
return(sendData);
}