docs: public static String readString(ChannelBuffer buffer, int length,
  			Charset charset)
  	{
  		String str = null;
  		if (null == charset)
  		{
  			charset = CharsetUtil.UTF_8;
  		}
  		try
  		{
  			ChannelBuffer stringBuffer = buffer.readSlice(length);
  			str = stringBuffer.toString(charset);
  		}
  		catch (Exception e)
  		{
  			throw new RuntimeException(e);
  		}
  		return str;
  	}