Internet Explorer URL Display problem

Chris Yuzik chris at
Fri Dec 12 17:09:19 GMT 2003

On Fri, 2003-12-12 at 03:47, Randal, Phil wrote:
> RFC 2396 ( generalises URIs.

I only skimmed the spec. But what I gathered, unless I completely
misunderstood the document is that characters from %00 through %1F
inclusive and %7F are control characters and shouldn't be in a URI.

   Although they are disallowed within the URI syntax, we include here a
   description of those US-ASCII characters that have been excluded and
   the reasons for their exclusion.

   The control characters in the US-ASCII coded character set are not
   used within a URI, both because they are non-printable and because
   they are likely to be misinterpreted by some control mechanisms.

   control     = <US-ASCII coded characters 00-1F and 7F hexadecimal>

So how much trouble would we cause if we just disallowed the entire
range of control characters from URIs? Can anyone think of a real website
that legitimately uses any of these control codes within their URIs? I'm
particularly concerned about shopping sites with their massive URIs.

I still think I would rather have MailScanner do the checking for this
so we can notify the recipient properly, rather than just marking
the message as high spam and/or deleting the message altogether. Perhaps
we could even have MailScanner remove the link code altogether but still
deliver the rest of the message.



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