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173 lines
3.5 KiB
173 lines
3.5 KiB
2 years ago
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#! /usr/bin/env perl
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use strict;
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use warnings;
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use Text::Markdown qw(markdown);
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use FindBin qw($Bin);
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my $title = "no title";
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my $body = "no body";
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# 解析 GET 参数
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my $query = $ENV{QUERY_STRING};
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my %query = map {$1 => $2 if /(\w+)=(\S+)/} split('&', $query);
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my $mdpath = $query{p};
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response() unless $mdpath;
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$mdpath = "$Bin/$mdpath.md";
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response() unless -r $mdpath;
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my $mdfile = prefile($mdpath);
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my $text = join("", @{$mdfile->{content}});
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# my $text = join("\n", @{$mdfile->{content}});
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# <pre> will add anthor empty line
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$title = $mdfile->{title} if $mdfile->{title};
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$body = markdown($text, {tab_width => 2});
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fixlink();
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# postbody();
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response();
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# read markdown file, save some information with hash
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# Text::Markdown fail to handle code block such as
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# ```perl
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# any code snippet
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# ```
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sub prefile
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{
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my ($filename) = @_;
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my $filemark = {content => [], title => '', tags => [], };
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my $codeblok = 0;
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open(my $fh, '<', $filename) or die "cannot open $filename $!";
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# local $/ = undef; $text = <$fh>;
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while (<$fh>) {
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# chomp;
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# title line
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if ($. == 1) {
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push(@{$filemark->{content}}, $_);
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(my $title = $_ ) =~ s/^[#\s]+//;
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$filemark->{title} = $title;
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next;
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}
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# tag line
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elsif ($. == 2){
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my @tags = /`([^`]+)`/g;
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if (@tags) {
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push(@{$filemark->{tags}}, @tags);
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next;
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}
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}
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# begin/end code block ```perl
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if (/^\s*```(\S*)\s*$/) {
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my $line = $_;
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if (!$codeblok) {
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$line = qq{<pre><code class="language-$1">};
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$codeblok = 1;
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}
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else {
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$line = qq{</code></pre>\n};
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$codeblok = 0;
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}
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push(@{$filemark->{content}}, $line);
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}
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else {
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push(@{$filemark->{content}}, $_);
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}
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}
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close($fh);
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return $filemark;
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}
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# 回应输出
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sub response
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{
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print "Content-type:text/html\n\n";
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print <<EndOfHTML;
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width" />
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<link rel="stylesheet" type="text/css" href="/css/main.css">
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<link rel="stylesheet" type="text/css" href="/css/markdown.css">
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<title> $title </title>
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</head>
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<body>
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$body
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</body>
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</html>
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EndOfHTML
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}
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sub debug_query
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{
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$body = "";
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while (my ($key, $value) = each %query) {
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$body .= "$key => $value<br/>";
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}
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}
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sub postbody
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{
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$body .= qq{<hr>\n};
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for my $tag (@{$mdfile->{tags}}) {
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$body .= qq{<code>$tag</code> };
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}
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}
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# fix links from/to home content and prev/next pages
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sub fixlink
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{
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my $base = $ENV{SCRIPT_NAME};
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my $subname = $query{p};
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if ($subname =~ /^content$/) {
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$body =~ s/href="(.+)\.md"/href="$base?p=$1"/g;
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}
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else {
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my ($prev, $next) = findprenext($subname);
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my @foot = ();
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push(@foot, "<hr/>");
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$prev ? push(@foot, qq{<a href="$base?p=$prev">Prev</a>})
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: push(@foot, qq{<a>First</a>});
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push(@foot, qq{<a href="$base?p=content">| Home |</a>});
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$next ? push(@foot, qq{<a href="$base?p=$next">Next</a>})
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: push(@foot, qq{<a>Last</a>});
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$body .= sprintf(qq{\n<div class="foot-link"> %s \n</div>\n}, join("\n", @foot));
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}
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}
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# read content.md, find the prev/next page
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sub findprenext
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{
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my $curname = shift;
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my ($prev, $next) = ('', '');
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my $tocname = "$Bin/content.md";
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return ($prev, $next) unless -f $tocname;
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open(my $fh, '<', $tocname) or die "cannot open $tocname $!";
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my ($prev_may, $cur_may);
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while (<$fh>) {
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chomp;
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next unless /\((\S+)\.md\)/;
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$prev_may = $cur_may;
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$cur_may = $1;
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if ($cur_may eq $curname) {
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$prev = $prev_may;
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next;
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}
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if ($prev_may eq $curname) {
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$next = $cur_may;
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last;
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}
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}
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close($fh);
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return ($prev, $next);
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}
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