On web application someone is making invalid HTTP request containing invalid bytes.
According to RFC 3986, section 2 only ASCII characters are allowed in the HTTP Request line. However I am receiving request contains the byte sequence (in Hex) \0xC3 \0xA6, which is the UTF-8 byte sequence for '
æ' (which of course should have been percent encoded as
%C3%A6). In the apache log they show up as
\xc3\xa6. Nevertheless this is an invalid HTTP request, so I would like configure apache to respond with an error 400 Bad Request in this case instead of delegating the request to my Rails app. How can I do that?
BTW: My web application is a Ruby on Rails (served by Phusion Passenger mod_rails 3.0.13), but I don't think it is relevant to the question, as I am interested in configuring apache so that these requests never reaches my application.