bkahlert opened a new pull request #232: Fix handling of query parameters with no value, like `?foo` URL: https://github.com/apache/tomcat/pull/232 Currently undefined values are returned as an empty string by `Parameters#getParameter(String)`, though `null` should be returned. **Background:** A query string can contain defined and undefined variable values. A variable with a defined value is followed by a `=` (e.g. `?foo=abc` where `foo` is the string `abc`, or `bar=` where the string is empty). A variable with an undefined value is not followed by `=`. In Java such a value is coded with `null` and not an empty string because the latter is already the defined value of a string with zero length. See also https://tools.ietf.org/html/rfc6570#section-2.3 and https://github.com/OpenFeign/feign/issues/872#issuecomment-452390655
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