Assume I have a lot of html forms with text inputs, and I want to palce some restrictions for the set of allowed chars. Sort of a sanity check, at the charset level. For a concrete example, my storage (db) uses LATIN9 (iso-8859-15), and the user sometimes can enter the non-allowed acute-accent (instead of the intended-correct apostrophe). In this -and similar cases- I want to detect it (replacing it with the "good" character, or throwing an error). I wish to do it globally, not field by field... though not for the entire application, but for a set of actions. I was thinking of an interceptor that operates at the HttpServletRequest level, before the ParametersInterceptor is applied (I don't care if the http param corresponds to a String property), but this does not seem very straightforward , as the HttpServletRequest does not allow to manipulate the params. Any suggestion or pointer?
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