protected byte[] getCloseMessageBytes(Integer aStatus, String aMessage)
throws CharacterCodingException {
byte[] results = null;
if (aMessage != null) {
byte[] temp = convertFromStringToBytes(aMessage);
if (temp.length + 2 <= getMaxPayloadSize()) {
byte[] statusBytes =
new byte[] {
new Integer(aStatus % 0x100).byteValue(), new Integer(aStatus / 0x100).byteValue()
};
results = WebSocketUtil.appendArray(statusBytes, temp);
}
} else if (aStatus != null && aStatus > 0) {
results =
new byte[] {
new Integer(aStatus % 0x100).byteValue(), new Integer(aStatus / 0x100).byteValue()
};
}
return results;
}
public boolean parseHeader(byte[] aData, int aOffset) {
// get header data bits
int bufferLength = 14;
byte[] data = aData;
// do we have an existing fragment to work with
if (getFragment() != null) {
if (getFragment().length >= bufferLength) {
data = getFragment();
} else {
byte[] both;
if ((aData != null ? aData.length : 0) - aOffset >= bufferLength - getFragment().length) {
both =
WebSocketUtil.appendPartialArray(
getFragment(), aData, aOffset, bufferLength - getFragment().length);
} else {
both = WebSocketUtil.appendArray(getFragment(), aData);
}
data = both;
}
}
if (data != null && data.length - aOffset < bufferLength) {
bufferLength = data.length - aOffset;
}
if (bufferLength < 0 || data == null) {
return false;
}
byte[] buffer = WebSocketUtil.copySubArray(data, 0, bufferLength);
// determine opcode
if (bufferLength > 0) {
int index = 0;
setFinal((buffer[index] & 0x80) != 0);
setRSV1((buffer[index] & 0x40) != 0);
setRSV2((buffer[index] & 0x20) != 0);
setRSV3((buffer[index] & 0x20) != 0);
setOpCode(buffer[index++] & 0x0F);
// handle data depending on opcode
switch (getOpCode()) {
case TEXT:
setPayloadType(PayloadType.TEXT);
break;
case BINARY:
setPayloadType(PayloadType.BINARY);
break;
}
// handle content, if any
if (bufferLength > 1) {
// do we have a mask
boolean hasMask = (buffer[index] & 0x80) != 0;
// get payload length
Long dataLength = new Integer(buffer[index++] & 0x7F).longValue();
if (dataLength == 126) {
// exit if we are missing bytes
if (bufferLength < 4) {
return false;
}
dataLength = new Integer(WebSocketUtil.convertBytesToShort(buffer, index)).longValue();
index += 2;
} else if (dataLength == 127) {
// exit if we are missing bytes
if (bufferLength < 10) {
return false;
}
dataLength = WebSocketUtil.convertBytesToLong(buffer, index);
index += 8;
}
// if applicable, set mask value
if (hasMask) {
// exit if we are missing bytes
if (bufferLength < index + 4) {
return false;
}
// grab mask
setMask(WebSocketUtil.convertBytesToInt(buffer, index));
index += 4;
}
payloadStart = index;
if (dataLength > Integer.MAX_VALUE) {
throw new IllegalArgumentException(
"Implementation does not support payload lengths in excess of "
+ Integer.MAX_VALUE
+ ": "
+ dataLength);
}
payloadLength = dataLength.intValue();
return true;
}
}
return false;
}
public void appendFragment(byte[] aData) {
fragment = WebSocketUtil.appendArray(fragment, aData);
}
