recursive search through HTML files

Searching example from a Well House Consultants training course
More on Searching [link]

Source code: my_search.pl Module: P409

#!/bin/perl -- -*-perl-*-
use CGI_Lite;

$cgi = new CGI_Lite ();
%data = $cgi->parse_form_data ();

########## Recursive locator of all HTML files

@sites = ("www.wellho.net" => "/export/home/www/cosite",
 "aviemore/pan" => "/extra/disc0.slice5/www/pan");

for ($k=0;$k<@sites;$k+=2) {
 $website=$sites[$k];
 $root=$sites[$k+1];
 opendir SITE,$root;
 @objects = readdir SITE;
 close SITE;
 foreach (@objects) {
 next if (/^\./);
 if (/\.s?html?$/i) {
 push @pages,"$website/$_","$root/$_";
 next;
 }
 if (-d "$root/$_") {
 push @sites,"$website/$_","$root/$_";
 }
 }
}

########## Matching loop

print <<"HEAD"
Content-type: text/html

<HTML>
<TITLE>Search response page</TITLE>
<BODY BGCOLOR=WHITE>
HEAD
;

print "searching for: ",$data{"lookfor"}," \n";
foreach $sw("case","whole","and","top","common","tags"){
 print ("$sw",($data{$sw})?" - ON":" - OFF"," \n");
 }
print "Search Results:\n";

@words = split(/\s+/,$data{"lookfor"});
$npmat=0;

# Eliminate common words

if ($data{"common"}) {
 while (<DATA>){
 for ($k=0; $k<@words; $k++) {
 splice(@words,$k--,1) if (/$words[$k]/i);
 }
 }
}

for ($k=0;$k<@pages;$k+=2) {
 $web=$pages[$k];
 $absolute=$pages[$k+1];

 open (PAGE,$absolute);
 read (PAGE,$pgtext,-s $absolute);

# Eliminate tags if requested
# On practical example, also eliminate comments, applets, etc
# On practical example, leave meta-description and keywords!

 ($pgtitle) = ($pgtext =~ /<title>(.*)<\/title>/is);
 ($pgtext =~ s/<.*?>//gs) if ($data{"tags"});
 $score_to_date = 1;
 foreach $w(@words) {

# match, taking account of case and whole-word
# note first occurrence

 if ($data{"case"}) {
 if ($data{"whole"}) {
 $nm = @nm = ($pgtext =~ /\b$w\b/g);
 $nm && $data{"top"} &&
 ($pgtext =~ /^(.*)\b$w\b/s),
 $pr = length($1)/length($pgtext);
 } else {
 $nm = @nm = ($pgtext =~ /\b$w/g);
 $nm && $data{"top"} &&
 ($pgtext =~ /^(.*)\b$w/s),
 $pr = length($1)/length($pgtext);
 }
 } else {
 if ($data{"whole"}) {
 $nm = @nm = ($pgtext =~ /\b$w\b/ig);
 $nm && $data{"top"} &&
 ($pgtext =~ /^(.*)\b$w\b/is),
 $pr = length($1)/length($pgtext);
 } else {
 $nm = @nm = ($pgtext =~ /\b$w/ig);
 $nm && $data{"top"} &&
 ($pgtext =~ /^(.*)\b$w/is),
 $pr = length($1)/length($pgtext);
 }
 }

# weight position on page. 6 times as important at start as
# at end!

 $nm *= (1.2 - $pr) if ($nm && $pr);

# "and" or "or" scoring system

 if ($nm) {
 if ($data{"and"}) {
 $score_to_date *= 10*$nm;
 } else {
 $score_to_date += $nm;
 }
 }
 }

# total weight calculated.
 if ($score_to_date > 1.0) {
 $noted{$web} = $score_to_date;
 $title{$web} = ($pgtitle || "[[Page has no title]]");
 $npmat++;
 }
}

print @pages/2," checked ";
print $npmat," matched";

################ All matching done! Sort by success ###############

foreach $page(sort {$noted{$b}<=>$noted{$a}} keys %noted) {
 $tops ||= $noted{$page};
 $percent = sprintf("%d%%",$noted{$page}*100/$tops);
 print "$title{$page} ";
 print "<A HREF=http://$page>$page</A> \n";
 print "Score: $noted{$page} Percentage: $percent\n";
 }
print "</BODY></HTML>\n";

__END__
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