How to deal with information received in two packets - actionscript-3

Question

This is the case. I want to make a game, client being made in flash and server on java. From server side, the first byte i write on the stream is the protocol id, like this:
try
{
Output.writeByte(LOGIN);
Output.writeByte((byte)ID);
Output.writeByte(new_position.x);
Output.writeByte(new_position.y);
Output.flush();
}
After the 'onResponse' event is triggered, the socket is read like this:
type:int = socket_client.readByte();
if (type == 0x1)
FP.console.log("You are logged as " + socket_client.readByte() + " in x:" + socket_client.readByte() + " y:" + socket_client.readByte() );
else if (type == 0x2)
FP.console.log("You are now in x:" + socket_client.readByte() + " y:" + socket_client.readByte());
As you probably have guessed by now, this gives me some problems. Sometimes, server sends the information split in two, so the above code throws an EOF exception. Tracing the following code gives me sometimes this result:
trace("SIZE: " + socket_client.bytesAvailable);
//var type:int = socket_client.readByte();
var values:String = "";
while (socket_client.bytesAvailable > 0)
values += socket_client.readByte() + " ";
trace(values);`
Values:
SIZE: 1
2
SIZE: 2
2 6
The first '2' is the protocol id, the second and the third stands for x and y values.
Now, the question is, how can i prevent this to happen? How could i 'wait' until i have all the information needed?
Btw, on java this never happens, but i have no more control than on as3.

Answer 1

Add BufferedOutputStream in output initialization like this:
Output = new DataOutputStream(new BufferedOutputStream(connection.getOutputStream()));

Answer 2

Basically you need to switch your message format from [type, data] to [type, length, data]. Then, wait to process the data until bytesAvailable >= length, otherwise put it into a buffer.
Here is an example SOCKET_DATA handler that uses this logic:
https://github.com/magicalhobo/Flash-CS5-mobile-proxy/blob/master/com/magicalhobo/mobile/proxy/MobileClient.as#L110