How to parse relatives links to absolute links?

I know we have to use reg. expression, but any suggestions would be very helpful!
for example: <a href="link.htm"> --> <a href="http://domain.com/link.htm">

(that is just a SIMPLE form of link, take other formats of hyperlink into consideration too)



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Son

this should work, assuming that the double quote of the a href is the first double quote in the string
<BLOCKQUOTE><font size="1" face="Verdana,Arial,Helvetica">code:</font><HR><pre>$var = "<a href="link.html">";
$domain = "http://domain.com/";


$var =~ s/"/"$domain/;
// $var is now
// <a href="http://domain.com/link.html">[/code]


[This message has been edited by RyanP (edited August 22, 2000).]

You can also collapse out any ..'s in your path using:
$var =~ s![^/]*/../!!g;
Just makes it look prettier. :-)

this hack would work:

$domain = "http://www.yourdomain.com/";

s/a href="/a href="$domain/;

I gonna try these solutions now! Thanks guys
For the last solution, "<A" need not go together with "HREF", so if you use it, in most cases, it's okay, but the error is there!!

------------------
http://new.123finder.com/ - Helps you find cool domains for FREE & Registers it for only $14.95/yr
http://www.guideclick.com/ - Qualified webmaster resources (affiliate programs, web design, tips)

------
Son

>>this hack would work:
>>$domain = "http://www.yourdomain.com/";
>>s/a href="/a href="$domain/;

This would fail in many ways:

1) <A href="link.htm">
2) <a HREF="link.htm">
3) <a href ="link.htm">
4) <a href= "link.htm">

Always expect what worse things can happen. All four above are valid hyperlinks. Even the URL without quotes.

Check this out -> http://www.devshed.com/Talk/Forums/Forum5/HTML/001858.html

[This message has been edited by freebsd (edited August 23, 2000).]

chris: what are those bangs in your RE for? i've never seen them used like that

Ah, this is the rather tasty feature of Perl that allows you to choose your quote characters. There's no rule that says you have to use / to delimit your regular expressions (or that you have to use " to delimit an interpolated string, or ' to delimit a non-interpolated string, for that matter). You can specify your quote character as you need. So you can do:
s!find!replace!g
or even
s(find){replace}g
(Perl will allow you to use naturally paired delimiters).
For quotes, you can do:
q/my string/
for a non-interpolated string, and
qq/my string/
for an interpolated string
You don't have to use / there, you can use any non-alphanumeric, non-whitespace character.

There is a shortcut regarding /'s whereby
$var =~ /regexp/
is interpreted as
$var =~ m/regexp/

Check out the perlop manpage for more info:
perldoc perlop