protected String getHttpMethodAction(ServletRequest request) {
        String method = ((HttpServletRequest) request).getMethod();
        return getHttpMethodAction(method);
    }
Determines the action (verb) attempting to be performed on the filtered resource by the current request.
<p/>
This implementation expects the incoming request to be an {@link HttpServletRequest} and returns a mapped
action based on the HTTP request {@link javax.servlet.http.HttpServletRequest#getMethod() method}.

@param request to pull the method from.
@return The string equivalent verb of the http method.
web/src/main/java/org/apache/shiro/web/filter/authz/HttpMethodPermissionFilter.java