Howdy,
>From org.apache.coyote.tomcat4.CoyoteAdapter:

        // Additional URI normalization and validation is needed for
security
        // reasons on Tomcat 4.0.x
        if (connector.getUseURIValidationHack()) {
            String uri = validate(request.getRequestURI());
            if (uri == null) {
                res.setStatus(400);
                res.setMessage("Invalid URI");
                throw new IOException("Invalid URI");
            } else {
                req.requestURI().setString(uri);
                // Redoing the URI decoding
                req.decodedURI().duplicate(req.requestURI());
                req.getURLDecoder().convert(req.decodedURI(), true);
            }
        }

Obviously you have to look at the complete source code to find out more,
speicifically what the validate() method does.  I didn't want to post
the whole source here ;)

Yoav Shapira
Millennium ChemInformatics


>-----Original Message-----
>From: Euan Guttridge [mailto:[EMAIL PROTECTED]
>Sent: Friday, June 20, 2003 5:11 AM
>To: '[EMAIL PROTECTED]'
>Subject: useURIValidationHack
>
>What is the connector param "useURIValidationHack"? I cannot find in
>documentation.
>
>Also can anyone point me to a description of diffs between the old http
>connector and the coyote connector please?
>
>
>Thanks
>Euan
>
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