InputStream.available() doen't work always

Question

I have a remote HTTP resource of 11kb that I want to retrieve through InputStream obtained from HttpURLConnection (of J2SE) and HttpConnection (of J2ME).
If I download it byte after byte with this code ("is" is InputStream instance from Http) :
int ch;
ByteArrayOutputStream f = new ByteArrayOutputStream();
while ((ch = is.read()) != -1)
f.write((byte)ch);
it works fine on J2ME on my mobile phone (Nokia 6680), with WirelesseToolkit Emulator and also in my J2SE application.
But if I try to fetch the resource with read(array) it works only on my Nokia 6680 and not in WIrelessToolkit Emulator and J2SE application.
The code I used is this:
int byteDisp = is.available();
byte[] arraySwap = new byte[byteDisp];
is.read(arraySwap);
The problem is that is.available doesn't give me the actual value of bytes of my remote resource when I use the code on my desktop pc (with J2ME emulator or J2SE application). So I think that the problem is caused by Internet connection because it works fine on my mobile phone.
Can you help me?
I don't want to use the while with the byte read.
Thanks you,
ReX

Answer 1

>
Now it works fine everytime and everywhere, do you
think that this solution could give me some
problems?The loop means that the CPU is doing work it doesn't need to.
You can solve this by doing something like the following pseudo code demonstrates.
    byte buffer = new byte[1];  // Note the '1'
   socket.ReadBlock(buffer) // Read only one byte and block till we get it
   AccumlateMessage(buffer)
   while(socket.available)
       buffer = new byte[socket.AvailableSize];
       socket.ReadBlock(buffer)
       AccumlateMessage(buffer)
For the above you can choose a value besides '1' if it seems reasonable for the actual protocol that you are using and with the possible error cases taken into account.