returns true if the request is a valid cors pre-flight one . concode_field_sep PlaceHolder placeHolder concode_field_sep boolean isCorsRequest
boolean function ( HttpServletRequest arg0 ) { return ( isCorsRequest ( arg0 ) && arg0 . getMethod ( ) . equals ( HttpMethod . OPTIONS . name ( ) ) && arg0 . getHeader ( HttpHeaders . ACCESS_CONTROL_REQUEST_METHOD ) != null ) ; }