In Eclipse Jetty, TryPathsHandler and TryFilesFilter can be configured to forward requests to template URIs such as index?p=$path, where $path is the request path in context.
However, URI paths may contain characters that are reserved in URI queries so that a path of /s&a=1 when applied to the template becomes index?p=/s&a=1, which is interpreted as 2 query parameters: p=/s and a=1, rather than just one query parameter p whose value is /s&a=1.