extracting the domain name

Writing in news:alt.www.webmaster
From the safety of the cafeteria
Ignoramus31199 <ignoramus31199.RemoveThis@NOSPAM.31199.invalid> said:

> ...
>
> $cgi->virtual_host ();

thanks - I can get the hostname, it's the domain name I'm after.

--
William Tasso

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Once upon a time, far far away "William Tasso"
<SpamBlocked RemoveThis @tbdata.com> muttered

>Greetings One and All

And pop-pickers?

>
>Been pondering domain names.

Everyone needs a hobby....

>
>Do you have an algo (that you don't mind sharing) that can pull the domain
>name from any of the likely strings (host/server name or URL) available to
>the (web) server?
>
>Either linear rule string manipulation or regular expression would suit
>just fine.
>

Can you be a bit more explicit.

>Thanks for reading.

That's okay. The invoice is in the post.
>--
>William Tasso

Matt Probert

>
>** Business as usual

Same as always
 >> Stay informed about: extracting the domain name 

"William Tasso" <SpamBlocked DeleteThis @tbdata.com> wrote in news:op.sts6nqcvm9g4qz-
wnt DeleteThis @tbdata.com:

>>
>> $cgi->virtual_host ();
>
> thanks - I can get the hostname, it's the domain name I'm after.

Oh you mean you just want to extract the part that would be used for
emailing? Like setting a spider to gather possible email addresses?

I think thats been done quite abit but not openly released for obvious
reasons

Gandalf Parker
 >> Stay informed about: extracting the domain name 

Writing in news:alt.www.webmaster
From the safety of the cafeteria
Ignoramus31199 <ignoramus31199 RemoveThis @NOSPAM.31199.invalid> said:


> ...
> you mean, say the hostname is www1.domain.com, you want to extract
> domain.com?
>
> I would do a "split", and then "pop" the last two items. It is good
> except for countries where domains are like domain.co.uk. perhaps if
> the second pop is a 'co' or some such, you could pop one more item.

Yes - that is exactly the issue, consider these hosts ...

www.example.com
example.com
office.example.com
admin.office.example.com

www.example.co.uk
etc...

www.example.uk.net
etc...

--
William Tasso

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Writing in news:alt.www.webmaster
From the safety of the GreyWyvern.com cafeteria
GreyWyvern <spam.DeleteThis@greywyvern.com> said:

> And lo, Matt Probert didst speak in alt.www.webmaster:
>
>> Once upon a time, far far away "William Tasso"
>> <SpamBlocked.DeleteThis@tbdata.com> muttered
>>
>>> Either linear rule string manipulation or regular expression would suit
>>> just fine.
>>
>> Can you be a bit more explicit.
>
> William is explicit enough without you asking him to be more so!
> Next thing you know you'll be asking him to take off that Speedo of
> his...

Ugh - as always, the invitation will be politely refused.

--
William Tasso

** Business as usual
 >> Stay informed about: extracting the domain name 

Writing in news:alt.www.webmaster
From the safety of the cafeteria
Gandalf Parker <gandalf DeleteThis @most.of.my.favorite.sites> said:

> "William Tasso" <SpamBlocked DeleteThis @tbdata.com> wrote in news:op.sts6nqcvm9g4qz-
> wnt DeleteThis @tbdata.com:
>
>>>
>>> $cgi->virtual_host ();
>>
>> thanks - I can get the hostname, it's the domain name I'm after.
>
> Oh you mean you just want to extract the part that would be used for
> emailing?

well not really

sales DeleteThis @example.com
and
sales DeleteThis @office.example.com

may both be valid mail addresses. I'm only interested in the domain.

> Like setting a spider to gather possible email addresses?

Heh he - no need these hosts/domains already sit nicely on my servers.
I'm writing a generic component that incidentally needs to know the domain
name regadless of hostname.

> I think thats been done quite abit but not openly released for obvious
> reasons

except that in the case of mail spiders there is no incentive to get it
right.

--
William Tasso

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Writing in news:alt.www.webmaster
From the safety of the Castle Amber - software development cafeteria
John Bokma <john.TakeThisOut@castleamber.com> said:


> ...
> for ( $domain ) {
>
> # remove sub domain
> s/www?\d?\.([^\.]+\.)/$1/g; # common ww(w)(\d) prefix
> s/.+\.([^\.]+\.[a-z]{3})$/$1/g;
> s/.+\.([^\.]+\.[^\.]+\.[a-z]{2})$/$1/g;
> }

thanks, but ...

> is what I used for a project. Note: it's far from perfect .

yes, having thought on it some more I'm coming to the conclusion it cannot
be done purely with logic.

As these domains are all known to me I think I'll have to do a match
against a data store - splitting the hostname and starting at the back,
adding elements till I find a match.

Really can't think of anything else that is guaranteed to work (for an
acceptable value of 'work')

--
William Tasso

** Business as usual
 >> Stay informed about: extracting the domain name