Re: Programmers with network engineering skills

[Paul Graydon <paul () paulgraydon co uk>]

On 03/12/2012 09:46 AM, Tei wrote:
> On 12 March 2012 09:59, Carlos Martinez-Cagnazzo<carlosm3011 () gmail com>  wrote:
> > Hey!
> >
> > On 3/8/12 8:24 PM, Lamar Owen wrote:
> > > On Monday, March 05, 2012 09:36:41 PM Jimmy Hess wrote:
> > > ...
> > > >     (16)  The default gateway's IP address is always 192.168.0.1
> > > >     (17) The user portion of E-mail addresses never contain special
> > > > characters like  "-" "+"  "$"   "~"  "."  ",", "[",  "]"
> > I've just had my ' xx AT cagnazzo.name' email address rejected by a web
> > form saying that 'it is not a valid email address'. So I guess point
> > (17) can be extended to say that 'no email address shall end in anything
> > different that .com, .net or the local ccTLD'
> >
> > :=)
> >
> > Carlos
>
> Yea, I don't even know how programmers can get that wrong.  The regex
> is not even hard or anything.
>
>
> (?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])
It's supposedly a lot harder than that.  Try this for strict RFC822 
compliance (from http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html):

(?:(?:\r\n)?[ \t])*(?:(?:(?:[^()<>@,;:\\".\[\] 
\000-\031]+(?:(?:(?:\r\n)?[ \t]
)+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ 
\t]))*"(?:(?:
\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
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\t]))*"(?:(?:\r\n)?[ \t])*))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\0
31]+(?:(?:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\
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+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ 
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\t])*))*\>(?:(
?:\r\n)?[ \t])*))*)?;\s*)

Paul