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From: Robbie Hatley on 15 Apr 2008 16:35

"Ben Bullock" wrote:

> Well OK but if I was going to do this for real, I would use something like
> /\b(($validdns\.){1,62}(com|net|org|us|uk|ca|jp))\b/i
> or similar (I haven't checked this regex with the machine yet but
> hopefully you get the picture).

The problem with "(com|net|org|us|uk|ca|jp)" or similar is that there are hundreds
or thousands of such valid domain suffixes. You're forgetting "es" (Spain),
"ru" (Russia), "uk" (Ukraine), "us" (USA), not to mention "mil", "gov", "edu", "biz",
"info", etc, etc, etc. That's part of why my URL-matching regex was so vague.

> I just wanted to make the point that the &$% stuff is not valid as part of the
> web address.

Those characters all appear in web addresses. For instance, "&" is used as
a field separator for server-side script (php, Perl, etc) commands embedded in
URLs. Similarly, "?" announces that the next cluster of alphanumeric characters
is a parameter for the previous command. If you reject such characters, you reject
many valid URLs. Just look at any YouTube URL. This one, for example:
http://uk.youtube.com/watch?v=I9ciR9qR1dU&feature=bz303

Maybe what you meant is that such characters are invalid in domain names;
but I was trying to capture and linkify document URLs, not domain names or
domain-level URLs such as "http://www.acme.com/". Trying to concoct a
foolproof RE that captures every valid URL and rejects every invalid one
is a real piece of work. And any such "perfect" URL-matching RE would
quickly become obsolete anyway as the Internet changes over time.
Hence I tend to go for a vauge RE that I believe captures every valid
document URL, at the cost of occasionally caputuring a few invalid ones.
Unless someone knows a better approach.

--
Cheers,
Robbie Hatley
lonewolf aatt well dott com
www dott well dott com slant user slant lonewolf slant


From: Abigail on 15 Apr 2008 16:54
_
Robbie Hatley (see.my.signature(a)for.my.email.address) wrote on VCCCXLI
September MCMXCIII in <URL:news:8O-dnRQyuZYOjJjVnZ2dnUVZ_u-unZ2d(a)giganews.com>:
`'
`' Maybe what you meant is that such characters are invalid in domain names;
`' but I was trying to capture and linkify document URLs, not domain names or
`' domain-level URLs such as "http://www.acme.com/". Trying to concoct a
`' foolproof RE that captures every valid URL and rejects every invalid one
`' is a real piece of work. And any such "perfect" URL-matching RE would
`' quickly become obsolete anyway as the Internet changes over time.
`' Hence I tend to go for a vauge RE that I believe captures every valid
`' document URL, at the cost of occasionally caputuring a few invalid ones.
`' Unless someone knows a better approach.


You mean, something like:

(?:(?:(?:http)://(?:(?:(?:(?:(?:(?:[a-zA-Z0-9][-a-zA-Z0-9]*)?[a-zA-Z0-9])[.])*(?:[a-zA-Z][-a-zA-Z0-9]*[a-zA-Z0-9]|[a-zA-Z])[.]?)|(?:[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+)))(?::(?:(?:[0-9]*)))?(?:/(?:(?:(?:(?:(?:(?:[a-zA-Z0-9\-_.!~*'():@&=+$,]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*)(?:;(?:(?:[a-zA-Z0-9\-_.!~*'():@&=+$,]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*))*)(?:/(?:(?:(?:[a-zA-Z0-9\-_.!~*'():@&=+$,]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*)(?:;(?:(?:[a-zA-Z0-9\-_.!~*'():@&=+$,]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*))*))*))(?:[?](?:(?:(?:[;/?:@&=+$,a-zA-Z0-9\-_.!~*'()]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*)))?))?)|(?:(?:nntp)://(?:(?:(?:(?:(?:(?:(?:(?:[a-zA-Z0-9][-a-zA-Z0-9]*)?[a-zA-Z0-9])[.])*(?:[a-zA-Z][-a-zA-Z0-9]*[a-zA-Z0-9]|[a-zA-Z]))|(?:[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+)))(?::(?:(?:[0-9]+)))?)/(?:(?:[a-zA-Z][-A-Za-z0-9.+_]*))(?:/(?:[0-9]+))?))|(?:(?:file)://(?:(?:(?:(?:(?:(?:(?:(?:[a-zA-Z0-9][-a-zA-Z0-9]*)?[a-zA-Z0-9])[.])*(?:[a-zA-Z][-a-zA-Z0-9]*[a-zA-Z0-9]|[a-zA-Z]))|(?:[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+))|localhost)?)(?:/(?:(?:(?:(?:[-a-zA-Z0-9$_.+!*'(),:@&=]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*)(?:/(?:(?:[-a-zA-Z0-9$_.+!*'(),:@&=]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*))*)))))|(?:(?:ftp)://(?:(?:(?:(?:[a-zA-Z0-9\-_.!~*'();:&=+$,]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*))(?:)@)?(?:(?:(?:(?:(?:(?:[a-zA-Z0-9][-a-zA-Z0-9]*)?[a-zA-Z0-9])[.])*(?:[a-zA-Z][-a-zA-Z0-9]*[a-zA-Z0-9]|[a-zA-Z])[.]?)|(?:[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+)))(?::(?:(?:[0-9]*)))?(?:/(?:(?:(?:(?:(?:[a-zA-Z0-9\-_.!~*'():@&=+$,]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*)(?:/(?:(?:[a-zA-Z0-9\-_.!~*'():@&=+$,]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*))*))(?:;type=(?:[AIai]))?))?)|(?:(?:tel):(?:(?:(?:[+](?:[0-9\-.()]+)(?:;isub=[0-9\-.()]+)?(?:;postd=[0-9\-.()*#ABCDwp]+)?(?:(?:;(?:phone-context)=(?:(?:(?:[+][0-9\-.()]+)|(?:[0-9\-.()*#ABCDwp]+))|(?:(?:[!'E-OQ-VX-Z_e-oq-vx-z~]|(?:%(?:2[124-7CFcf]|3[AC-Fac-f]|4[05-9A-Fa-f]|5[1-689A-Fa-f]|6[05-9A-Fa-f]|7[1-689A-Ea-e])))(?:[!'()*\-.0-9A-Z_a-z~]+|(?:%(?:2[1-9A-Fa-f]|3[AC-Fac-f]|[4-6][0-9A-Fa-f]|7[0-9A-Ea-e])))*)))|(?:;(?:tsp)=(?: |(?:(?:(?:[A-Za-z](?:(?:(?:[-A-Za-z0-9]+)){0,61}[A-Za-z
0-9])?)(?:[.](?:[A-Za-z](?:(?:(?:[-A-Za-z0-9]+)){0,61}[A-Za-z0-9])?))*))))|(?:;(?:(?:[!'*\-.0-9A-Z_a-z~]+|%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|5[AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))*)(?:=(?:(?:(?:(?:[!'*\-.0-9A-Z_a-z~]+|%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|5[AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))*)(?:[?](?:(?:[!'*\-.0-9A-Z_a-z~]+|%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|5[AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))*))?)|(?:%22(?:(?:%5C(?:[a-zA-Z0-9\-_.!~*'()]|(?:%[a-fA-F0-9][a-fA-F0-9])))|[a-zA-Z0-9\-_.!~*'()]+|(?:%(?:[01][a-fA-F0-9])|2[013-9A-Fa-f]|[3-9A-Fa-f][a-fA-F0-9]))*%22)))?))*)|(?:[0-9\-.()*#ABCDwp]+(?:;isub=[0-9\-.()]+)?(?:;postd=[0-9\-.()*#ABCDwp]+)?(?:;(?:phone-context)=(?:(?:(?:[+][0-9\-.()]+)|(?:[0-9\-.()*#ABCDwp]+))|(?:(?:[!'E-OQ-VX-Z_e-oq-vx-z~]|(?:%(?:2[124-7CFcf]|3[AC-Fac-f]|4[05-9A-Fa-f]|5[1-689A-Fa-f]|6[05-9A-Fa-f]|7[1-689A-Ea-e])))(?:[!'()*\-.0-9A-Z_a-z~]+|(?:%(?:2[1-9A-Fa-f]|3[AC-Fac-f]|[4-6][0-9A-Fa-f]|7[0-9A-Ea-e])))*)))(?:(?:;(?:phone-context)=(?:(?:(?:[+][0-9\-.()]+)|(?:[0-9\-.()*#ABCDwp]+))|(?:(?:[!'E-OQ-VX-Z_e-oq-vx-z~]|(?:%(?:2[124-7CFcf]|3[AC-Fac-f]|4[05-9A-Fa-f]|5[1-689A-Fa-f]|6[05-9A-Fa-f]|7[1-689A-Ea-e])))(?:[!'()*\-.0-9A-Z_a-z~]+|(?:%(?:2[1-9A-Fa-f]|3[AC-Fac-f]|[4-6][0-9A-Fa-f]|7[0-9A-Ea-e])))*)))|(?:;(?:tsp)=(?: |(?:(?:(?:[A-Za-z](?:(?:(?:[-A-Za-z0-9]+)){0,61}[A-Za-z0-9])?)(?:[.](?:[A-Za-z](?:(?:(?:[-A-Za-z0-9]+)){0,61}[A-Za-z0-9])?))*))))|(?:;(?:(?:[!'*\-.0-9A-Z_a-z~]+|%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|5[AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))*)(?:=(?:(?:(?:(?:[!'*\-.0-9A-Z_a-z~]+|%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|5[AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))*)(?:[?](?:(?:[!'*\-.0-9A-Z_a-z~]+|%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|5[AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))*))?)|(?:%22(?:(?:%5C(?:[a-zA-Z0-9\-_.!~*'()]|(?:%[a-fA-F0-9][a-fA-F0-9])))|[a-zA-Z0-9\-_.!~*'()]+|(?:%(?:[01][a-fA-F0-9])|2[013-9A-Fa-f]|[3-9A-Fa-f][a-fA-F0-9]))*%22)))?))*))))|(?:(?:fax):(?:(?:(?:[+](?:[0-9\-.()]+)(?:;isub=[0-9\-.()]+)?(?:;tsub=[0-9\-.()]+)?(?:;postd=[0-9\-.()*#ABCDwp]+)?(?:(?:;(?:phone-context)=(?:(?
:(?:[+][0-9\-.()]+)|(?:[0-9\-.()*#ABCDwp]+))|(?:(?:[!'E-OQ-VX-Z_e-oq-vx-z~]|(?:%(?:2[124-7CFcf]|3[AC-Fac-f]|4[05-9A-Fa-f]|5[1-689A-Fa-f]|6[05-9A-Fa-f]|7[1-689A-Ea-e])))(?:[!'()*\-.0-9A-Z_a-z~]+|(?:%(?:2[1-9A-Fa-f]|3[AC-Fac-f]|[4-6][0-9A-Fa-f]|7[0-9A-Ea-e])))*)))|(?:;(?:tsp)=(?: |(?:(?:(?:[A-Za-z](?:(?:(?:[-A-Za-z0-9]+)){0,61}[A-Za-z0-9])?)(?:[.](?:[A-Za-z](?:(?:(?:[-A-Za-z0-9]+)){0,61}[A-Za-z0-9])?))*))))|(?:;(?:(?:[!'*\-.0-9A-Z_a-z~]+|%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|5[AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))*)(?:=(?:(?:(?:(?:[!'*\-.0-9A-Z_a-z~]+|%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|5[AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))*)(?:[?](?:(?:[!'*\-.0-9A-Z_a-z~]+|%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|5[AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))*))?)|(?:%22(?:(?:%5C(?:[a-zA-Z0-9\-_.!~*'()]|(?:%[a-fA-F0-9][a-fA-F0-9])))|[a-zA-Z0-9\-_.!~*'()]+|(?:%(?:[01][a-fA-F0-9])|2[013-9A-Fa-f]|[3-9A-Fa-f][a-fA-F0-9]))*%22)))?))*)|(?:[0-9\-.()*#ABCDwp]+(?:;isub=[0-9\-.()]+)?(?:;tsub=[0-9\-.()]+)?(?:;postd=[0-9\-.()*#ABCDwp]+)?(?:;(?:phone-context)=(?:(?:(?:[+][0-9\-.()]+)|(?:[0-9\-.()*#ABCDwp]+))|(?:(?:[!'E-OQ-VX-Z_e-oq-vx-z~]|(?:%(?:2[124-7CFcf]|3[AC-Fac-f]|4[05-9A-Fa-f]|5[1-689A-Fa-f]|6[05-9A-Fa-f]|7[1-689A-Ea-e])))(?:[!'()*\-.0-9A-Z_a-z~]+|(?:%(?:2[1-9A-Fa-f]|3[AC-Fac-f]|[4-6][0-9A-Fa-f]|7[0-9A-Ea-e])))*)))(?:(?:;(?:phone-context)=(?:(?:(?:[+][0-9\-.()]+)|(?:[0-9\-.()*#ABCDwp]+))|(?:(?:[!'E-OQ-VX-Z_e-oq-vx-z~]|(?:%(?:2[124-7CFcf]|3[AC-Fac-f]|4[05-9A-Fa-f]|5[1-689A-Fa-f]|6[05-9A-Fa-f]|7[1-689A-Ea-e])))(?:[!'()*\-.0-9A-Z_a-z~]+|(?:%(?:2[1-9A-Fa-f]|3[AC-Fac-f]|[4-6][0-9A-Fa-f]|7[0-9A-Ea-e])))*)))|(?:;(?:tsp)=(?: |(?:(?:(?:[A-Za-z](?:(?:(?:[-A-Za-z0-9]+)){0,61}[A-Za-z0-9])?)(?:[.](?:[A-Za-z](?:(?:(?:[-A-Za-z0-9]+)){0,61}[A-Za-z0-9])?))*))))|(?:;(?:(?:[!'*\-.0-9A-Z_a-z~]+|%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|5[AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))*)(?:=(?:(?:(?:(?:[!'*\-.0-9A-Z_a-z~]+|%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|5[AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))*)(?:[?](?:(?:[!'*\-.0-9A-Z_a-z~]+|%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|5[
AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))*))?)|(?:%22(?:(?:%5C(?:[a-zA-Z0-9\-_.!~*'()]|(?:%[a-fA-F0-9][a-fA-F0-9])))|[a-zA-Z0-9\-_.!~*'()]+|(?:%(?:[01][a-fA-F0-9])|2[013-9A-Fa-f]|[3-9A-Fa-f][a-fA-F0-9]))*%22)))?))*))))|(?:(?:prospero)://(?:(?:(?:(?:(?:(?:[a-zA-Z0-9][-a-zA-Z0-9]*)?[a-zA-Z0-9])[.])*(?:[a-zA-Z][-a-zA-Z0-9]*[a-zA-Z0-9]|[a-zA-Z]))|(?:[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+)))(?::(?:(?:[0-9]+)))?/(?:(?:(?:(?:[-a-zA-Z0-9$_.+!*'(),?:@&=]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*)(?:/(?:(?:[-a-zA-Z0-9$_.+!*'(),?:@&=]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*))*))(?:(?:;(?:(?:[-a-zA-Z0-9$_.+!*'(),?:@&]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*)=(?:(?:[-a-zA-Z0-9$_.+!*'(),?:@&]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*))*))|(?:(?:tv):(?:(?:(?:(?:(?:[a-zA-Z0-9][-a-zA-Z0-9]*)?[a-zA-Z0-9])[.])*(?:[a-zA-Z][-a-zA-Z0-9]*[a-zA-Z0-9]|[a-zA-Z])[.]?))?)|(?:(?:telnet)://(?:(?:(?:(?:(?:[-a-zA-Z0-9$_.+!*'(),;?&=]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*))(?::(?:(?:(?:[-a-zA-Z0-9$_.+!*'(),;?&=]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*)))?)@)?(?:(?:(?:(?:(?:(?:(?:[a-zA-Z0-9][-a-zA-Z0-9]*)?[a-zA-Z0-9])[.])*(?:[a-zA-Z][-a-zA-Z0-9]*[a-zA-Z0-9]|[a-zA-Z]))|(?:[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+)))(?::(?:(?:[0-9]+)))?)(?:/)?)|(?:(?:news):(?:(?:[*]|(?:(?:[-a-zA-Z0-9$_.+!*'(),;/?:&=]+|(?:%[a-fA-F0-9][a-fA-F0-9]))+@(?:(?:(?:(?:(?:[a-zA-Z0-9][-a-zA-Z0-9]*)?[a-zA-Z0-9])[.])*(?:[a-zA-Z][-a-zA-Z0-9]*[a-zA-Z0-9]|[a-zA-Z]))|(?:[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+)))|(?:[a-zA-Z][-A-Za-z0-9.+_]*))))|(?:(?:wais)://(?:(?:(?:(?:(?:(?:[a-zA-Z0-9][-a-zA-Z0-9]*)?[a-zA-Z0-9])[.])*(?:[a-zA-Z][-a-zA-Z0-9]*[a-zA-Z0-9]|[a-zA-Z]))|(?:[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+)))(?::(?:(?:[0-9]+)))?/(?:(?:(?:(?:[-a-zA-Z0-9$_.+!*'(),]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*))(?:[?](?:(?:(?:[-a-zA-Z0-9$_.+!*'(),;:@&=]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*))|/(?:(?:(?:[-a-zA-Z0-9$_.+!*'(),]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*))/(?:(?:(?:[-a-zA-Z0-9$_.+!*'(),]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*)))?))|(?:(?:gopher)://(?:(?:(?:(?:(?:(?:[a-zA-Z0-9][-a-zA-Z0-9]*)?[a-zA-Z0-9])[.])*(?:[a-zA-Z][-a-zA-Z0-9]*[a-zA-Z0-9]|[a-zA-Z]))|(?:[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+)))(?::(
?:(?:[0-9]+)))?/(?:(?:(?:[0-9+IgT]))(?:(?:(?:[-a-zA-Z0-9$_.+!*'(),:@&=]+|(?:%[a-fA-F0-9][a-fA-F0-9]))*))))|(?:(?:pop)://(?:(?:(?:(?:[-a-zA-Z0-9$_.+!*'(),&=~]+|(?:%[a-fA-F0-9][a-fA-F0-9]))+))(?:;AUTH=(?:[*]|(?:(?:(?:[-a-zA-Z0-9$_.+!*'(),&=~]+|(?:%[a-fA-F0-9][a-fA-F0-9]))+)|(?:[+](?:APOP|(?:(?:[-a-zA-Z0-9$_.+!*'(),&=~]+|(?:%[a-fA-F0-9][a-fA-F0-9]))+))))))?@)?(?:(?:(?:(?:(?:(?:[a-zA-Z0-9][-a-zA-Z0-9]*)?[a-zA-Z0-9])[.])*(?:[a-zA-Z][-a-zA-Z0-9]*[a-zA-Z0-9]|[a-zA-Z]))|(?:[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+)))(?::(?:(?:[0-9]+)))?))
I don't believe in capturing a few invalid ones - nor in rejected valid ones.

Abigail
--
$_ = "\x3C\x3C\x45\x4F\x54"; s/<<EOT/<<EOT/e; print;
Just another Perl Hacker
EOT
From: A. Sinan Unur on 15 Apr 2008 19:44
Abigail <abigail(a)abigail.be> wrote in
news:slrng0a5g5.uuv.abigail(a)alexandra.abigail.be:

> _
> Robbie Hatley (see.my.signature(a)for.my.email.address) wrote on
> VCCCXLI September MCMXCIII in
> <URL:news:8O-dnRQyuZYOjJjVnZ2dnUVZ_u-unZ2d(a)giganews.com>: `'
....
> `' Unless someone knows a better approach.
>
>
> You mean, something like:
>
> (?:(?:(?:http)://(?:(?:(?:(?:(?:(?:[a-zA-Z0-9][-a-zA-Z0-9]*)?[a

<snipped for brevity>

OK, now you are just showing off ;-)

Joking aside, that giant block shows the utility of building regular
expressions from small building blocks.

In any case, I would like to take this opportunity to thank you
for Regexp::Common. It has saved me a lot of work over time.

The OP would benefit from using

http://search.cpan.org/~abigail/Regexp-Common-2.120/lib/Regexp/Common/URI.pm

as opposed to resigning himself to second or third or nth rate
'solutions'.

Thank you.

Sinan

--
A. Sinan Unur <1usa(a)llenroc.ude.invalid>
(remove .invalid and reverse each component for email address)

comp.lang.perl.misc guidelines on the WWW:
http://www.rehabitation.com/clpmisc/
From: Robbie Hatley on 15 Apr 2008 20:28

"Abigail" put forth into the annals of Usenet:

> (a rather large URL-capturing regex)

Hmmm... I'm curious, did you write that manually, or generate it
programmatically? If generated, using what software?

And how many decaseconds does it take a regex compiler to process
that?

> I don't believe in capturing a few invalid ones - nor in
> rejected valid ones.

I believe in simplicity over perfection. Given these choices:
A. Make a 100% perfect program taking 284 man-hours
B. Make a 97% perfect program taking 5 man-hours
I usually take B.

--
perl -le 'print "\122\157b\142\151e\40\110\141t\154\145y";'
perl -le 'print "\124\165s\164\151n\54\40\103A\54\40\125\123A";'
perl -le 'print "\154one\167olf\100\167ell\56\143om\n";'
perl -le 'print scalar reverse "/flowenol~/moc.llew.www//\72ptth";'


From: szr on 15 Apr 2008 20:47
Ben Bullock wrote:
> On Tue, 15 Apr 2008 13:35:27 -0700, Robbie Hatley wrote:
>
>> "Ben Bullock" wrote:
>>
>>> Well OK but if I was going to do this for real, I would use
>>> something like
>>> /\b(($validdns\.){1,62}(com|net|org|us|uk|ca|jp))\b/i or similar (I
>>> haven't checked this regex with the machine yet but hopefully you
>>> get the picture).
>>
>> The problem with "(com|net|org|us|uk|ca|jp)" or similar is that there
>> are hundreds or thousands of such valid domain suffixes.
>
> I think there are only about 200 or so, most of which are rare.
>
>> You're
>> forgetting "es" (Spain), "ru" (Russia), "uk" (Ukraine), "us" (USA),
>> not to mention "mil", "gov", "edu", "biz", "info", etc, etc, etc.
>
> Um, I have both "us" and "uk" there. I didn't know that uk was Ukraine
> though.

According to http://www.iana.org/domains/root/db/, ".uk" is United
Kingdom, and ".ua" is Ukraine (".gb" is also reserved and labeled for
the United Kingdom, though ".uk" was used instead.)

--
szr


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