What if the proxied service is case-insensitive

Our proxied service is tolerant about the casing of it's request parameters.
But we'd like to map one request parameter;

We would like to support this caseinsensitve feature, because of different types of clients that are involved.

So ideally the Query predicates should handle parameter names in a case-insensitive way

This might be achieved by having the MultiValueMap queryParams in the QueryRoutePredicateFactory based on a org.springframework.util.LinkedCaseInsensitiveMap?

sample:

having a request: ?REQUEST=getcapabilities

In a GlobalPostFilter i can see this with:

        LinkedCaseInsensitiveMap map = new LinkedCaseInsensitiveMap();
        map.putAll(exchange.getRequest().getQueryParams());
        logger.info("REQUEST:{}", map.get("request"));

mapping on Query: Request would not have mapped.

Start by locating QueryRoutePredicateFactory and reading how Query predicates obtain and compare request parameter names. Use the reported REQUEST/request example to define the expected matching behavior, then verify that Query predicate routing handles parameter names case-insensitively without changing unrelated query handling.