code: @Override
      public byte[] getBody() throws AuthFailureError {
          if (mOutput == null) {
              openOutput();
          }
          try {
              if (mMultipart) {
  
                  mOutput.write(CRLF + "--" + BOUNDARY + "--" + CRLF);
              }
              return mOutput.toByteArray();
          } catch (IOException e) {
              e.printStackTrace();
              return mOutput.toByteArray();
          } finally {
              try {
                  mOutput.close();
              } catch (IOException e) {
                  e.printStackTrace();
              }
              mOutput = null;
          }
  
      }
docs: get request body