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Old 11-14-2007, 03:45 AM   #1 (permalink)
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Red face A problem of receiving data from server

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Hi, everyone:

I want to receive data from server again and again in a while loop , but it seems some strange things happen. The server has sent the data through a socket, and the data format is "data length + data". And if the client connect to the server by a socket connection, the server will send the data to client.

the receiving codes are :
Code:
byte[] buf = new byte[4];
SocketConnection sock = (SocketConnection)Connector.open(server.toString(),Connector.READ);
DataInputStream inStream = sock.openDataInputStream();                
while(true)
{                                   
   count = inStream.read( buf,0, buf.length);                              
   if ( (count == 4) && (buf != null) )
   {                        
       dataLength = bytes2int(buf); //analyze the package head 
    }
   imageData = new byte[dataLength];                                       
   count = inStream.read(imageData,0,imageData.length);   
   //process the imageData
   .........
}
And during the testing, I find that the program runs well at the beginning, but the dataLength will occur error sometimes, it's a big value and this makes the failture of the "new byte[dataLength]". From the log file of the server, I know that the datalength sent by server is OK.

So does anyone have any ideas?Thank you very much!
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