HttpConnection truncating messages in Sony Ericsson W580

Question

Hi guys,

I've been having a problem while using HttpConnection with a Sony Ericsson W580.

The response to my http requests is application/octet-stream, and I'm sending a quite large array of bytes.

In this mobile phone however, it is consistently being cut down to 210 bytes...

I've tested the MIDP application in a large number of different mobile phones, using different mobile carriers and wi-fi, and no other mobile has shown this behavior.

Answer 1

Ok, I found the problem. Entirely my fault...

How I was reading the stream:

while(true){
 int bytesRead = stream.read(tmpBuffer);
 // if -1, EOF
 if(bytesRead < 0)
  break;

 (...)

 // WRONG LOGIC !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 // if we read the last chunk of data, and found EOF
 if(bytesRead < tmpBufferArrayLength)
  break;
 // WRONG LOGIC !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
}

See the part between the "wrong logic !!!" comments? I was assuming that if read(tmpBuffer) could not fill the tmp buffer entirely, it was because EOF was being reached. The API does not guarantee this at all: it just states that EOF is signaled by a read(tmpBuffer) returning -1.

I didn't see this before because all the mobiles (and emulatores) I'd tested were being able to fill completely the buffer at every call.