private boolean readAllData(byte[] data) {
        int readSoFar = 0;
        int chunkSoFar = 0;
        int iter = 0;
        while(readSoFar < data.length) {
            if(!isConnected()) {
                Log.d("readAllData", "connection lost. can't read");
                break;
            }
            int bytesLeft = data.length - readSoFar;
            int chunkLeft = IO_MAX_CHUNK_SIZE - chunkSoFar;
            int readThisTime = 0;
            try {
                lastReadStart = System.currentTimeMillis();
                readThisTime = input.read(data, readSoFar, Math.min(bytesLeft, chunkLeft));
                iter++;
            } catch (IOException e) {
                Log.d("readAllData", "chunkLeft"+chunkLeft+", iter"+iter);
                e.printStackTrace();
            }

            if(readThisTime <= 0)
                break;
            else {
                // After reading a chunk, ping server to confirm still connected
                readSoFar += readThisTime;
                chunkSoFar += readThisTime;
                if(chunkSoFar == IO_MAX_CHUNK_SIZE) {
                    Log.d("readAllData", "pinging");
                    try { output.write(0); }
                    catch (IOException e) {
                        e.printStackTrace();
                        return false;
                    }
                    chunkSoFar = 0;
                }
            }
        }
        if(readSoFar != data.length) {
            Log.d("readAllData", "read "+readSoFar+" / "+data.length+" bytes");
        }
        return readSoFar == data.length;
    }