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Re: [apps-discuss] Fun with URLs and regex

Mark Nottingham <mnot@mnot.net> Thu, 08 January 2015 15:06 UTC

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From: Mark Nottingham <mnot@mnot.net>
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To: Bjoern Hoehrmann <derhoermi@gmx.net>
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Subject: Re: [apps-discuss] Fun with URLs and regex
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On 7 Jan 2015, at 6:23 pm, Bjoern Hoehrmann <derhoermi@gmx.net> wrote:
> 
>> I didn’t finish mailto or data, because they allow quoted-string inside 
>> of URLs, and that makes my head hurt.
> 
> The bigger problem might be that URI scheme grammars typically do not
> account for %xx-encoding. It should be fine to write `dAtA:;B%41se64,`,
> so you cannot use literals like `;base64` directly, unless you apply
> some syntax-preserving pre-processing. RFC 6068 also re-writes the RFC
> 5322 productions it uses in prose, and considering how complex the RFC
> 5322 grammar is, it is probably not wise to attempt to do this manually.

This is exactly the problem I ran into.

I think that this really needs to be clearer in the documents; while we all understand that the ABNF needs to be read within the context of the prose, this is stretching credibility IMO.

Cheers,


--
Mark Nottingham   http://www.mnot.net/

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