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|
#!/usr/bin/perl
use strict;
use warnings;
use Storable qw(retrieve);
use Encode qw(decode_utf8);
use HTML::Escape qw(escape_html);
use Time::HiRes qw(gettimeofday tv_interval);
use BSD::Resource;
# 1. Start Benchmark Timer
my $start_time = [gettimeofday];
my $files_read = 0; # Track IO Activity
# Decode search text
my $search_text = '';
if (($ENV{QUERY_STRING} || '') =~ /^q=([^&]*)/) {
$search_text = decode_utf8($1 // "");
$search_text =~ s/\P{Print}//g;
$search_text = substr($search_text, 0, 64);
$search_text =~ s/^\s+|\s+$//g;
}
# We search using lowercase for the case-insensitive index
my $query = lc($search_text);
my $query_len = length($query);
my @results;
if ($query_len >= 3 && -f 'sa.bin' && -f 'corpus.bin') {
open(my $fh_sa, '<', 'sa.bin') or die $!;
open(my $fh_cp, '<', 'corpus.bin') or die $!;
my $file_map = retrieve('file_map.dat');
$files_read += 3;
my $total_suffixes = (-s 'sa.bin') / 4;
# Helper for binary search comparisons
sub compare_at {
my ($idx, $fh_sa, $fh_cp, $q, $len) = @_;
seek($fh_sa, $idx * 4, 0);
read($fh_sa, my $bin_off, 4);
my $off = unpack("L", $bin_off);
seek($fh_cp, $off, 0);
read($fh_cp, my $text, $len);
return ($text cmp $q, $off);
}
# Range Search: Find Left and Right boundaries
my ($low, $high) = (0, $total_suffixes - 1);
my $first_hit = -1;
while ($low <= $high) {
my $mid = int(($low + $high) / 2);
my ($cmp) = compare_at($mid, $fh_sa, $fh_cp, $query, $query_len);
if ($cmp >= 0) { $first_hit = $mid if $cmp == 0; $high = $mid - 1; }
else { $low = $mid + 1; }
}
if ($first_hit != -1) {
($low, $high) = ($first_hit, $total_suffixes - 1);
my $last_hit = $first_hit;
while ($low <= $high) {
my $mid = int(($low + $high) / 2);
my ($cmp) = compare_at($mid, $fh_sa, $fh_cp, $query, $query_len);
if ($cmp <= 0) { $last_hit = $mid if $cmp == 0; $low = $mid + 1; }
else { $high = $mid - 1; }
}
# Collect unique file results
my %seen;
for my $i ($first_hit .. $last_hit) {
my (undef, $offset) = compare_at($i, $fh_sa, $fh_cp, $query, $query_len);
foreach my $m (@$file_map) {
if ($offset >= $m->{start} && $offset < $m->{end}) {
if (!$seen{$m->{path}}++) {
my $snip_start = ($offset - 30 < $m->{start}) ? $m->{start} : $offset - 30;
seek($fh_cp, $snip_start, 0);
read($fh_cp, my $raw_snip, 80);
push @results, {
path => $m->{path},
title => "Result: " . (split('/', $m->{path}))[-2],
snippet => "..." . escape_html($raw_snip) . "..."
};
}
last;
}
}
last if @results >= 20;
}
}
close($fh_sa);
close($fh_cp);
}
# 2. Calculate Metrics
my $end_time = [gettimeofday];
my $elapsed = tv_interval($start_time, $end_time);
my $rusage = getrusage();
my $user_cpu = $rusage->utime;
my $system_cpu = $rusage->stime;
my $max_rss = $rusage->maxrss;
# 3. Output
print "Content-Type: text/html\n\n";
my $list;
if ($search_text eq '') {
$list = "<p>Please enter a search term above.</p>";
} elsif (@results == 0) {
$list = "<p>No results found for \"<b>" . escape_html($search_text) . "</b>\".</p>";
} else {
$list = "<ul>";
foreach my $res (@results) {
$list .= "<li><a href=\"/$res->{path}\">$res->{title}</a><br><small>$res->{snippet}</small></li>";
}
$list .= "</ul>";
}
my $safe_search_text = escape_html($search_text);
my $year = (localtime)[5] + 1900;
print <<"HTML";
<!DOCTYPE html>
<html lang="en-us">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Search</title>
<link rel="stylesheet" href="/assets/css/main.css">
<link rel="stylesheet" href="/assets/css/skeleton.css">
</head>
<body>
<div id="nav-container" class="container">
<ul id="navlist" class="left">
<li><a href="/" class="link-decor-none">hme</a></li>
<li><a href="/log/" class="link-decor-none">log</a></li>
<li><a href="/projects/" class="link-decor-none">poc</a></li>
<li><a href="/about/" class="link-decor-none">abt</a></li>
<li class="active"><a href="/cgi-bin/find.cgi" class="link-decor-none">sws</a></li>
<li><a href="/feed.xml" class="link-decor-none">rss</a></li>
</ul>
</div>
<main class="container" id="main">
<div class="container">
<h2>Search</h2>
<form action="" method="GET">
<input id="search-box" type="text" name="q" value="$safe_search_text">
<input id="search-btn" type="submit" value="Search">
</form>
$list
<div style="background: #f4f4f4; padding: 10px; border-radius: 5px; font-family: monospace; font-size: 0.85em; margin-top: 20px; border: 1px solid #ddd;">
<strong>Performance Metrics:</strong><br>
Total Time: @{[ sprintf("%.4f", $elapsed) ]} seconds<br>
User CPU: $user_cpu s<br>
System CPU: $system_cpu s<br>
Peak RAM: $max_rss KB<br>
Files Read: $files_read (IO Activity)
</div>
</div>
</main>
<div class="footer">
<div class="container">
<div class="twelve columns right container-2">
<p id="footer-text">© ASCIIMX - $year</p>
</div>
</div>
</div>
</body>
</html>
HTML
|
