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

["Martin J. Dürst" <[e-mail]>]

On 2015/01/08 08:23, Bjoern Hoehrmann wrote:
> * Mark Nottingham wrote:
>> I’ve updated my Python script that serves as a translation of ABNF for
>> URIs into regex.
>
> I note that there are a number of automated tools for this; I have not
> tried any of them recently though, but perhaps other can suggest one.
>
>> https://gist.github.com/mnot/138549
>>
>> It now validates the following URI schemes according to their respective
>> specifications:
>>   - http
>>   - https
>>   - file
>>   - data
>>   - gopher
>>   - ws
>>   - wss
>>   - mailto
>>
>> I didn’t finish mailto or data, because they allow quoted-string inside
>> of URLs, and that makes my head hurt.

It'd probably make my head hurt, too, but I'll try to do it 
(automatically or manually) to help verify or update 
http://tools.ietf.org/html/rfc6068.

> 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,`,

By RFC 3986 at least, it is.

> 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.

Did you mean 'automatically'? I would agree in that case.

Regards,   Martin.