code: @Override
      public ServletInputStream getInputStream() throws IOException {    
  
          if(_in == null){
  
              //create the inputstream 
              _in = new SRTUpgradeInputStream31();       
              _inbb = new UpgradeInputByteBufferUtil(this);
              _in.init(_inbb);
          }
          return _in;
      }
docs: /*
  (non-Javadoc)
  
  @see javax.servlet.http.WebConnection#getInputStream()