Sanitize Search Input

HST's SearchInputParsingUtils provide utility methods for sanitizing potentially malicious query strings by filtering out invalid characters or constraining the use of wildcards.

For optimal performance, it is best to set the parse method's allowSingleNonLeadingWildCardPerTerm parameter to false:

final HstRequestContext context = request.getRequestContext();
final HippoBean scope = context.getSiteContentBaseBean();

HstQueryBuilder hstQueryBuilder = HstQueryBuilder.create(scope)
        .ofTypes(BaseDocument.class);

// PARSE the query
String query = getPublicRequestParameter(request, "query");
String parsedQuery = SearchInputParsingUtils.parse(query, false);
        
if (StringUtils.isNotEmpty(parsedQuery)) {
    hstQueryBuilder = hstQueryBuilder.where(constraint(".").contains(parsedQuery));
}
            
final HstQuery hstQuery = hstQueryBuilder.build();

final HstQueryResult result = hstQuery.execute();
request.setAttribute("result", result);