bkahlert edited a comment on issue #232: Fix handling of query parameters with no value, like `?foo` URL: https://github.com/apache/tomcat/pull/232#issuecomment-575914702 I fear we won't make progress here. To anyone who suffers from the same problem (I spent hours with it), I have created a workaround as a [gist - UndefinedToNullMappingWebMvcRegistrationsConfiguration.java](https://gist.github.com/bkahlert/47884a44edcbbff8da5e79696f428eff) that makes Spring Boot always parse the query string not just the same way as during the tests but also as you might expect it; `undefined` / `?foo` as `null` and `defined` / `?bar=&baz=%F0%9F%90%BB` as what it is (empty string and 🐻). ``` @Override public Map<String, String[]> getParameterMap() { MultiValueMap<String, String> parameterMap = UriComponentsBuilder .fromHttpRequest(new ServletServerHttpRequest(getRequest())).build().getQueryParams(); return parameterMap.entrySet().stream().collect(Collectors.toMap( Map.Entry::getKey, entry -> entry.getValue().toArray(new String[0]))); } ```
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