PortletServletRequest.getIntHeader doesn't correctly implement HttpServletRequest interface

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X EE, Master
• Fix Version/s: 7.0.0 DXP FP31, 7.0.5 CE GA6, 7.0.X, 7.1.X, Master
• Component/s: Core Infrastructure
• Labels:
  • liferay-digital-enterprise-70-sp6
  • liferay-fixpack-de-31-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Story Points: 1
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/51508

As stated in the JavaDoc of HttpServletRequest.getIntHeader:

Returns the value of the specified request header as an int. If the request does not have a header of the specified name, this method returns -1. If the header cannot be converted to an integer, this method throws a NumberFormatException.

In Liferay's PortletServletRequest, this method uses GetterUtil.getInteger with default value "0", and it doesn't throw NumberFormatException.

This is also the case with PortletServletRequest.getDateHeader