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(crazyinsomniac) Re: HTML Link Modifier

by crazyinsomniac (Prior)
on Dec 24, 2001 at 07:53 UTC ( #134139=note: print w/ replies, xml ) Need Help??


in reply to HTML Link Modifier

Here is my take on this. It is pretty similar, except the tag attributes ( src=... alt=...)are printed in the order they appear in the original text (you could also achieve this, if you used 'attrseq'). I however, use HTML::TokeParse and URI, and this one only modifies absolute urls (like links to other http|ftp sites, unlike yours, which will turn a 'mailto:foo@bar.baz.com' into $new_url.'mailto:foo@bar.baz.com'), but can easily be extended to modify any kind of URIs (that is Uniform Resource Identifier, not just Locator's ;D). If you were goning to make this more modular, i'd sugguest not doing it this way (extend HTML::Parser instead, but for a script, this is the perfect strategy, IMHO). Here goes:

#!/usr/bin/perl -w use strict; use LWP::Simple qw(get); use HTML::TokeParser; use URI; my $new_link = "http://www.baz.com/cgi-bin/doubleclick.cgi?url="; my $url = $ARGV[0] or die "usage: ". __FILE__ ." http://www.foo.com/ba +r.html\n"; my $file = get($url) or die "Cannot get the page '$url'\n"; my $P = HTML::TokeParser->new(\$file); while (my $T = $P->get_token() ) { # 0 1 2 3 4 if($$T[0] eq "S") # ["S", $tag, $attr, $attrseq, $text] { if($$T[1] eq 'img') { &handle_link($T, 'src'); } elsif($$T[1] eq 'a') { &handle_link($T, 'href'); } elsif($$T[1] eq 'script') { &handle_link($T, 'src'); } else # nothing we wanna change { print $$T[4]; } } elsif($$T[0] =~ /^(?:E|PI)$/ ) # end tag | process instruction { print $$T[2]; } elsif($$T[0] =~ /^(?:T|C|D)$/ ) # text | comment | declaration { print $$T[1]; } } # endof while (my $T = $P->get_token) sub handle_link { my ( $T, $A) = @_; my $URI = new URI( $$T[2]->{$A} ); # 0 1 2 3 4 # ["S", $tag, $attr, $attrseq, $text] my $scheme = $URI->scheme(); if( $scheme and $scheme =~ /^(http|ftp)$/i ) # only if its not rel +ative url (yes scheme) { $$T[2]->{$A} = $new_link . $URI->path(); # path is escaped } print "<$$T[1]", ( map { qq| $_="$$T[2]->{$_}"| } @{$$T[3]} ) , '>'; }

 
___crazyinsomniac_______________________________________
Disclaimer: Don't blame. It came from inside the void

perl -e "$q=$_;map({chr unpack qq;H*;,$_}split(q;;,q*H*));print;$q/$q;"


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