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Re: [O] Encoding Problem in export?
From: |
Nicolas Goaziou |
Subject: |
Re: [O] Encoding Problem in export? |
Date: |
Sat, 27 Jul 2013 13:09:28 +0200 |
David Maus <address@hidden> writes:
> The more I think about it the more I grow certain that it is NOT about
> URI encoding but protecting a string.
This is what I mean.
> `[' and `]' are not forbidden per se, they belong to the set of
> reserved characters (see RFC 3986, 2.2.).
>
> "characters in the reserved set are protected from normalization and
> are therefore safe to be used by scheme-specific and producer-specific
> algorithms for delimiting data subcomponents within a URI."
> (RFC 3986, p. 12)
>
> Moreover they are explicitly required in the host part to denote a
> IPv6 address literal (RFC 3986, 3.2.2).
>
> If I am not mistaken then this is a valid http-URI with a XPointer
> fragment pointing to the third `p' element in a locally hosted file:
>
> http://[::1]/foo.xml#xpointer(//p[3])
Thanks for the info. I didn't read RFC 3986 thoroughly.
> If we escape but don't unescape there are *other* problems: Depending
> on the protocol an escaped square bracket and a unescaped square
> bracket can have different meaning. The assumption I mentioned referes
> to unescaped characters. A consuming application knows the protocol
> and can infer the characters that need to be escaped.
We cannot unescape if we use %-encoding, as stated before.
> ACK. It's not about creating URIs but protecting strings, thus the
> rules for percent escaping don't have to be applied.
Indeed. Ideally, we need to encode "[" and "]" with strings that cannot
ever be found in a URI. Then, it will be possible to decode them safely.
Regards,
--
Nicolas Goaziou
- Re: [O] Encoding Problem in export?, (continued)
- Re: [O] Encoding Problem in export?, Nick Dokos, 2013/07/24
- Re: [O] Encoding Problem in export?, Nicolas Goaziou, 2013/07/24
- Re: [O] Encoding Problem in export?, David Maus, 2013/07/25
- Re: [O] Encoding Problem in export?, Nicolas Goaziou, 2013/07/25
- Re: [O] Encoding Problem in export?, David Maus, 2013/07/26
- Re: [O] Encoding Problem in export?, Nicolas Goaziou, 2013/07/26
- Re: [O] Encoding Problem in export?, David Maus, 2013/07/27
- Re: [O] Encoding Problem in export?,
Nicolas Goaziou <=
- Re: [O] Encoding Problem in export?, Jambunathan K, 2013/07/29
- Re: [O] Encoding Problem in export?, David Maus, 2013/07/28
- Re: [O] Encoding Problem in export?, Nicolas Goaziou, 2013/07/28
- Re: [O] Encoding Problem in export?, Jambunathan K, 2013/07/29
- Re: [O] Encoding Problem in export?, Jambunathan K, 2013/07/29