diff wiki.cgi @ 0:a2f0a2c135cf

hg init
author Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
date Sun, 06 Jun 2010 22:00:38 +0900
parents
children d67370516d8c
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wiki.cgi	Sun Jun 06 22:00:38 2010 +0900
@@ -0,0 +1,1435 @@
+#!/usr/bin/perl -X
+#!perl -X
+#
+# wiki.cgi - YukiWiki on Cassandra
+# Shoshi TAMAKI
+#
+##############################
+#
+# wiki.cgi - This is YukiWiki, yet another Wiki clone.
+#
+# Copyright (C) 2000-2004 by Hiroshi Yuki.
+# <hyuki@hyuki.com>
+# http://www.hyuki.com/yukiwiki/
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the same terms as Perl itself.
+#
+##############################
+# Libraries.
+use strict;
+use lib qw(.);
+use CGI qw(:standard);
+use CGI::Carp qw(fatalsToBrowser);
+use Yuki::RSS;
+use Yuki::DiffText qw(difftext);
+use Yuki::YukiWikiDB;
+use Yuki::PluginManager;
+use Cassandra::CassHash;
+require 'jcode.pl';
+# use Jcode;
+use Fcntl;
+# Check if the server can use 'AnyDBM_File' or not.
+# eval 'use AnyDBM_File';
+# my $error_AnyDBM_File = $@;
+my $version = '2.1.3';
+##############################
+#
+# You MUST modify following '$modifier_...' variables.
+#
+my $modifier_mail = 'hyuki@hyuki.com';
+my $modifier_url = 'http://www.hyuki.com/';
+my $modifier_name = 'Hiroshi Yuki';
+my $modifier_dir_data = '.'; # Your data directory (not URL, but DIRECTORY).
+my $modifier_url_data = '.'; # Your data URL (not DIRECTORY, but URL).
+my $modifier_rss_title = "YukiWiki $version";
+my $modifier_rss_link = 'http://www.hyuki.com/yukiwiki/wiki.cgi';
+my $modifier_rss_about = 'http://www.hyuki.com/yukiwiki/rss.xml';
+my $modifier_rss_description = 'This is YukiWiki, yet another Wiki clone';
+my $modifier_rss_timezone = '+09:00';
+##############################
+#
+# You MAY modify following variables.
+#
+#my $modifier_dbtype = 'YukiWikiDB';
+my $modifier_dbtype = 'Cassandra::CassHash';
+my $modifier_sendmail = '';
+# my $modifier_sendmail = '/usr/sbin/sendmail -t -n';
+my $modifier_dir_plugin = './plugin';
+##############################
+#
+# You MAY modify following variables.
+#
+my $file_touch = "$modifier_dir_data/touched.txt";
+my $file_resource = "$modifier_dir_data/resource.txt";
+my $file_FrontPage = "$modifier_dir_data/frontpage.txt";
+my $file_conflict = "$modifier_dir_data/conflict.txt";
+my $file_format = "$modifier_dir_data/format.txt";
+my $file_rss = "$modifier_dir_data/rss.xml";
+my $url_cgi = 'wiki.cgi';
+my $url_stylesheet = "$modifier_url_data/wiki.css";
+my $icontag = qq(<img src="$modifier_url_data/icon40x40.gif" alt="*" width="40" height="40" />);
+my $maxrecent = 50;
+my $max_message_length = 500_000; # -1 for unlimited.
+my $cols = 80;
+my $rows = 20;
+##############################
+#
+# You MAY modify following variables.
+# 
+my $dataname = "$modifier_dir_data/wiki";
+my $infoname = "$modifier_dir_data/info";
+my $diffname = "$modifier_dir_data/diff";
+my $editchar = '?';
+my $subject_delimiter = ' - ';
+my $use_autoimg = 1; # automatically convert image URL into <img> tag.
+my $use_exists = 0; # If you can use 'exists' method for your DB.
+my $use_FixedFrontPage = 0;
+##############################
+my $InterWikiName = 'InterWikiName';
+my $RecentChanges = 'RecentChanges';
+my $AdminChangePassword = 'AdminChangePassword';
+my $CompletedSuccessfully = 'CompletedSuccessfully';
+my $FrontPage = 'FrontPage';
+my $IndexPage = 'IndexPage';
+my $SearchPage = 'SearchPage';
+my $CreatePage = 'CreatePage';
+my $ErrorPage = 'ErrorPage';
+my $RssPage = 'RssPage';
+my $AdminSpecialPage = 'Admin Special Page'; # must include spaces.
+##############################
+my $wiki_name = '\b([A-Z][a-z]+([A-Z][a-z]+)+)\b';
+my $bracket_name = '\[\[(\S+?)\]\]';
+my $embedded_name = '\[\[(#\S+?)\]\]';
+my $interwiki_definition = '\[\[(\S+?)\ (\S+?)\]\]';
+my $interwiki_name = '([^:]+):([^:].*)';
+# Sorry for wierd regex.
+my $inline_plugin = '\&amp;(\w+)\((([^()]*(\([^()]*\))?)*)\)';
+##############################
+my $embed_comment = '[[#comment]]';
+my $embed_rcomment = '[[#rcomment]]';
+##############################
+my $info_ConflictChecker = 'ConflictChecker';
+my $info_LastModified = 'LastModified';
+my $info_IsFrozen = 'IsFrozen';
+my $info_AdminPassword = 'AdminPassword';
+##############################
+my $kanjicode = 'euc';
+my $charset = 'euc-jp';
+my $lang = 'ja';
+my %fixedpage = (
+    $IndexPage => 1,
+    $CreatePage => 1,
+    $ErrorPage => 1,
+    $RssPage => 1,
+    $RecentChanges => 1,
+    $SearchPage => 1,
+    $AdminChangePassword => 1,
+    $CompletedSuccessfully => 1,
+    $FrontPage => $use_FixedFrontPage,
+);
+my %form;
+my %database;
+my %infobase;
+my %diffbase;
+my %resource;
+my %interwiki;
+my $plugin_manager;
+my $plugin_context = {
+    debug => 0,
+    database => \%database,
+    infobase => \%infobase,
+    resource => \%resource,
+    form => \%form,
+    interwiki => \%interwiki,
+    url_cgi => $url_cgi,
+};
+##############################
+my %page_command = (
+    $IndexPage => 'index',
+    $SearchPage => 'searchform',
+    $CreatePage => 'create',
+    $RssPage => 'rss',
+    $AdminChangePassword => 'adminchangepasswordform',
+    $FrontPage => 'FrontPage',
+);
+my %command_do = (
+    read => \&do_read,
+    edit => \&do_edit,
+    adminedit => \&do_adminedit,
+    adminchangepasswordform => \&do_adminchangepasswordform,
+    adminchangepassword => \&do_adminchangepassword,
+    write => \&do_write,
+    index => \&do_index,
+    searchform => \&do_searchform,
+    search => \&do_search,
+    create => \&do_create,
+    createresult => \&do_createresult,
+    FrontPage => \&do_FrontPage,
+    comment => \&do_comment,
+    rss => \&do_rss,
+    diff => \&do_diff,
+);
+##############################
+# &test_convert;
+&main;
+exit(0);
+##############################
+
+sub main {
+    &init_resource;
+    # &check_modifiers;
+    &open_db;
+    &init_form;
+    &init_InterWikiName;
+    &init_plugin;
+    if ($command_do{$form{mycmd}}) {
+        &{$command_do{$form{mycmd}}};
+    } else {
+        &do_FrontPage;
+    }
+    &close_db;
+}
+
+sub do_read {
+    &print_header($form{mypage});
+    &print_content($database{$form{mypage}});
+    &print_footer($form{mypage});
+}
+
+sub do_edit {
+    my ($page) = &unarmor_name(&armor_name($form{mypage}));
+    &print_header($page);
+    if (not &is_editable($page)) {
+        &print_message($resource{cantchange});
+    } elsif (&is_frozen($page)) {
+        &print_message($resource{cantchange});
+    } else {
+        &print_editform($database{$page}, &get_info($page, $info_ConflictChecker), admin=>0);
+    }
+    &print_footer($page);
+}
+
+sub do_adminedit {
+    my ($page) = &unarmor_name(&armor_name($form{mypage}));
+    &print_header($page);
+    if (not &is_editable($page)) {
+        &print_message($resource{cantchange});
+    } else {
+        &print_message($resource{passwordneeded});
+        &print_editform($database{$page}, &get_info($page, $info_ConflictChecker), admin=>1);
+    }
+    &print_footer($page);
+}
+
+sub do_adminchangepasswordform {
+    &print_header($AdminChangePassword);
+    &print_passwordform;
+    &print_footer($AdminChangePassword);
+}
+
+sub do_adminchangepassword {
+    if ($form{mynewpassword} ne $form{mynewpassword2}) {
+        &print_error($resource{passwordmismatcherror});
+    }
+    my ($validpassword_crypt) = &get_info($AdminSpecialPage, $info_AdminPassword);
+    if ($validpassword_crypt) {
+        if (not &valid_password($form{myoldpassword})) {
+            &send_mail_to_admin(<<"EOD", "AdminChangePassword");
+myoldpassword=$form{myoldpassword}
+mynewpassword=$form{mynewpassword}
+mynewpassword2=$form{mynewpassword2}
+EOD
+            &print_error($resource{passworderror});
+        }
+    }
+    my ($sec, $min, $hour, $day, $mon, $year, $weekday) = localtime(time);
+    my (@token) = ('0'..'9', 'A'..'Z', 'a'..'z');
+    my $salt1 = $token[(time | $$) % scalar(@token)];
+    my $salt2 = $token[($sec + $min*60 + $hour*60*60) % scalar(@token)];
+    my $crypted = crypt($form{mynewpassword}, "$salt1$salt2");
+    &set_info($AdminSpecialPage, $info_AdminPassword, $crypted);
+
+    &print_header($CompletedSuccessfully);
+    &print_message($resource{passwordchanged});
+    &print_footer($CompletedSuccessfully);
+}
+
+sub do_index {
+    &print_header($IndexPage);
+    print qq(<ul>);
+    foreach my $page (sort keys %database) {
+        if (&is_editable($page)) {
+            print qq(<li><a href="$url_cgi?@{[&encode($page)]}">@{[&escape($page)]}</a>@{[&escape(&get_subjectline($page))]}</li>);
+            # print qq(<li>@{[&get_info($page, $info_IsFrozen)]}</li>);
+            # print qq(<li>@{[0 + &is_frozen($page)]}</li>);
+        }
+    }
+    print qq(</ul>);
+    &print_footer($IndexPage);
+}
+
+sub do_write {
+    if (&keyword_reject()) {
+        return;
+    }
+
+    if (&frozen_reject()) {
+        return;
+    }
+
+    if (&length_reject()) {
+        return;
+    }
+
+    if (not &is_editable($form{mypage})) {
+        &print_header($form{mypage});
+        &print_message($resource{cantchange});
+        &print_footer($form{mypage});
+        return;
+    }
+
+    if (&conflict($form{mypage}, $form{mymsg})) {
+        return;
+    }
+
+    # Making diff
+    if (1) {
+        &open_diff;
+        my @msg1 = split(/\r?\n/, $database{$form{mypage}});
+        my @msg2 = split(/\r?\n/, $form{mymsg});
+        $diffbase{$form{mypage}} = &difftext(\@msg1, \@msg2);
+        &close_diff;
+    }
+
+    if ($form{mymsg}) {
+        $database{$form{mypage}} = $form{mymsg};
+        &send_mail_to_admin($form{mypage}, "Modify");
+        &set_info($form{mypage}, $info_ConflictChecker, '' . localtime);
+        if ($form{mytouch}) {
+            &set_info($form{mypage}, $info_LastModified, '' . localtime);
+            &update_recent_changes;
+        }
+        &set_info($form{mypage}, $info_IsFrozen, 0 + $form{myfrozen});
+        &print_header($CompletedSuccessfully);
+        &print_message($resource{saved});
+        &print_content("$resource{continuereading} @{[&armor_name($form{mypage})]}");
+        &print_footer($CompletedSuccessfully);
+    } else {
+        &send_mail_to_admin($form{mypage}, "Delete");
+        delete $database{$form{mypage}};
+        delete $infobase{$form{mypage}};
+        if ($form{mytouch}) {
+            &update_recent_changes;
+        }
+        &print_header($form{mypage});
+        &print_message($resource{deleted});
+        &print_footer($form{mypage});
+    }
+}
+
+sub do_searchform {
+    &print_header($SearchPage);
+    &print_searchform("");
+    &print_footer($SearchPage);
+}
+
+sub do_search {
+    my $word = &escape($form{mymsg});
+    &print_header($SearchPage);
+    &print_searchform($word);
+    my $counter = 0;
+    foreach my $page (sort keys %database) {
+        next if $page =~ /^$RecentChanges$/;
+        if ($database{$page} =~ /\Q$form{mymsg}\E/ or $page =~ /\Q$form{mymsg}\E/) {
+            if ($counter == 0) {
+                print qq|<ul>|;
+            }
+            print qq(<li><a href ="$url_cgi?@{[&encode($page)]}">@{[&escape($page)]}</a>@{[&escape(&get_subjectline($page))]}</li>);
+            $counter++;
+        }
+    }
+    if ($counter == 0) {
+        &print_message($resource{notfound});
+    } else {
+        print qq|</ul>|;
+    }
+    &print_footer($SearchPage);
+}
+
+sub do_create {
+    &print_header($CreatePage);
+    print <<"EOD";
+<form action="$url_cgi" method="post">
+    <input type="hidden" name="mycmd" value="edit">
+    <strong>$resource{newpagename}</strong><br>
+    <input type="text" name="mypage" value="" size="20">
+    <input type="submit" value="$resource{createbutton}"><br>
+</form>
+EOD
+    &print_footer($CreatePage);
+}
+
+sub do_FrontPage {
+    if ($fixedpage{$FrontPage}) {
+        open(FILE, $file_FrontPage) or &print_error("($file_FrontPage)");
+        my $content = join('', <FILE>);
+        &code_convert(\$content, $kanjicode);
+        close(FILE);
+        &print_header($FrontPage);
+        &print_content($content);
+        &print_footer($FrontPage);
+    } else {
+        $form{mycmd} = 'read';
+        $form{mypage} = $FrontPage;
+        &do_read;
+    }
+}
+
+sub print_error {
+    my ($msg) = @_;
+    &print_header($ErrorPage);
+    print qq(<p><strong class="error">$msg</strong></p>);
+    &print_plugin_log;
+    &print_footer($ErrorPage);
+    exit(0);
+}
+
+sub print_header {
+    my ($page) = @_;
+    my $bodyclass = "normal";
+    my $editable = 0;
+    my $admineditable = 0;
+    if (&is_frozen($page) and $form{mycmd} =~ /^(read|write)$/) {
+        $editable = 0;
+        $admineditable = 1;
+        $bodyclass = "frozen";
+    } elsif (&is_editable($page) and $form{mycmd} =~ /^(read|write)$/) {
+        $admineditable = 1;
+        $editable = 1;
+    } else {
+        $editable = 0;
+    }
+    my $cookedpage = &encode($page);
+    my $escapedpage = &escape($page);
+    print <<"EOD";
+Content-type: text/html; charset=$charset
+
+<!DOCTYPE html
+    PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
+    "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="$lang">
+<head>
+    <meta http-equiv="Content-Language" content="$lang">
+    <meta http-equiv="Content-Type" content="text/html; charset=$charset">
+    <title>$escapedpage @{[&escape(&get_subjectline($page))]}</title>
+    <link rel="index" href="$url_cgi?$IndexPage">
+    <link rev="made" href="mailto:$modifier_mail">
+    <link rel="stylesheet" type="text/css" href="$url_stylesheet">
+    <link rel="alternate" type="application/rss+xml" title="RSS" href="$modifier_rss_about" />
+</head>
+<body class="$bodyclass">
+<div class="tools">
+    @{[ $admineditable
+        ? qq(<a title="$resource{admineditthispage}" href="$url_cgi?mycmd=adminedit&amp;mypage=$cookedpage">$resource{admineditbutton}</a> | )
+        : qq()
+    ]}
+    @{[ $editable
+        ? qq(<a title="$resource{editthispage}" href="$url_cgi?mycmd=edit&amp;mypage=$cookedpage">$resource{editbutton}</a> | )
+        : qq()
+    ]}
+    @{[ $admineditable
+        ? qq(<a href="$url_cgi?mycmd=diff&amp;mypage=$cookedpage">$resource{diffbutton}</a> | )
+        : qq()
+    ]}
+    <a href="$url_cgi?$CreatePage">$resource{createbutton}</a> | 
+    <a href="$url_cgi?$IndexPage">$resource{indexbutton}</a> | 
+    <a href="$modifier_rss_about">$resource{rssbutton}</a> | 
+    <a href="$url_cgi?$FrontPage">$FrontPage</a> | 
+    <a href="$url_cgi?$SearchPage">$resource{searchbutton}</a> | 
+    <a href="$url_cgi?$RecentChanges">$resource{recentchangesbutton}</a>
+</div>
+<h1 class="header"><a
+    title="$resource{searchthispage}"
+    href="$url_cgi?mycmd=search&amp;mymsg=$cookedpage">@{[&escape($page)]}</a>@{[&escape(&get_subjectline($page))]}</h1>
+EOD
+}
+
+sub print_footer {
+    my ($page) = @_;
+    print <<"EOD";
+<hr>
+<address class="footer">
+    Powered by <a href="http://www.hyuki.com/yukiwiki/">YukiWiki</a> $version <br />
+    Modified by <a href="$modifier_url">$modifier_name</a>.
+</address>
+<p class="footer">
+    <a href="http://www.hyuki.com/yukiwiki/">$icontag</a>
+</p>
+</body>
+</html>
+EOD
+}
+
+sub escape {
+    my $s = shift;
+    $s =~ s|\r\n|\n|g;
+    $s =~ s|\&|&amp;|g;
+    $s =~ s|<|&lt;|g;
+    $s =~ s|>|&gt;|g;
+    $s =~ s|"|&quot;|g;
+    return $s;
+}
+
+sub unescape {
+    my $s = shift;
+    # $s =~ s|\n|\r\n|g;
+    $s =~ s|\&amp;|\&|g;
+    $s =~ s|\&lt;|\<|g;
+    $s =~ s|\&gt;|\>|g;
+    $s =~ s|\&quot;|\"|g;
+    return $s;
+}
+
+sub print_content {
+    my ($rawcontent) = @_;
+    print &text_to_html($rawcontent, toc=>1);
+}
+
+sub text_to_html {
+    my ($txt, %option) = @_;
+    my (@txt) = split(/\r?\n/, $txt);
+    my (@toc);
+    my $verbatim;
+    my $tocnum = 0;
+    my (@saved, @result);
+    unshift(@saved, "</p>");
+    push(@result, "<p>");
+    foreach (@txt) {
+        chomp;
+
+        # verbatim.
+        if ($verbatim->{func}) {
+            if (/^\Q$verbatim->{done}\E$/) {
+                undef $verbatim;
+                push(@result, splice(@saved));
+            } else {
+                push(@result, $verbatim->{func}->($_));
+            }
+            next;
+        }
+
+        # non-verbatim follows.
+        push(@result, shift(@saved)) if (@saved and $saved[0] eq '</pre>' and /^[^ \t]/);
+        if (/^(\*{1,3})(.+)/) {
+            # $hn = 'h2', 'h3' or 'h4'
+            my $hn = "h" . (length($1) + 1);
+            push(@toc, '-' x length($1) . qq( <a href="#i$tocnum">) . &remove_tag(&inline($2)) . qq(</a>\n));
+            push(@result, splice(@saved), qq(<$hn><a name="i$tocnum"> </a>) . &inline($2) . qq(</$hn>));
+            $tocnum++;
+        } elsif (/^(-{2,3})\($/) {
+            if ($& eq '--(') {
+                $verbatim = { func => \&inline, done => '--)', class => 'verbatim-soft' };
+            } else {
+                $verbatim = { func => \&escape, done => '---)', class => 'verbatim-hard' };
+            }
+            &back_push('pre', 1, \@saved, \@result, " class='$verbatim->{class}'");
+        } elsif (/^----/) {
+            push(@result, splice(@saved), '<hr>');
+        } elsif (/^(-{1,3})(.+)/) {
+            &back_push('ul', length($1), \@saved, \@result);
+            push(@result, '<li>' . &inline($2) . '</li>');
+        } elsif (/^:([^:]+):(.+)/) {
+            &back_push('dl', 1, \@saved, \@result);
+            push(@result, '<dt>' . &inline($1) . '</dt>', '<dd>' . &inline($2) . '</dd>');
+        } elsif (/^(>{1,3})(.+)/) {
+            &back_push('blockquote', length($1), \@saved, \@result);
+            push(@result, &inline($2));
+        } elsif (/^$/) {
+            push(@result, splice(@saved));
+            unshift(@saved, "</p>");
+            push(@result, "<p>");
+        } elsif (/^(\s+.*)$/) {
+            &back_push('pre', 1, \@saved, \@result);
+            push(@result, &escape($1)); # Not &inline, but &escape
+        } elsif (/^\,(.*?)[\x0D\x0A]*$/) {
+            &back_push('table', 1, \@saved, \@result, ' border="1"');
+            #######
+            # This part is taken from Mr. Ohzaki's Perl Memo and Makio Tsukamoto's WalWiki.
+            # XXXXX
+            my $tmp = "$1,";
+            my @value = map {/^"(.*)"$/ ? scalar($_ = $1, s/""/"/g, $_) : $_} ($tmp =~ /("[^"]*(?:""[^"]*)*"|[^,]*),/g);
+            my @align = map {(s/^\s+//) ? ((s/\s+$//) ? ' align="center"' : ' align="right"') : ''} @value;
+            my @colspan = map {($_ eq '==') ? 0 : 1} @value;
+            for (my $i = 0; $i < @value; $i++) {
+                if ($colspan[$i]) {
+                    while ($i + $colspan[$i] < @value and $value[$i + $colspan[$i]] eq '==') {
+                        $colspan[$i]++;
+                    }
+                    $colspan[$i] = ($colspan[$i] > 1) ? sprintf(' colspan="%d"', $colspan[$i]) : '';
+                    $value[$i] = sprintf('<td%s%s>%s</td>', $align[$i], $colspan[$i], &inline($value[$i]));
+                } else {
+                    $value[$i] = '';
+                }
+            }
+            push(@result, join('', '<tr>', @value, '</tr>'));
+            # XXXXX
+            #######
+        } elsif (/^\#(\w+)(\((.*)\))?/) {
+            # BlockPlugin.
+            my $original_line = $_;
+            my $plugin_name = $1;
+            my $argument = &escape($3);
+            my $result = $plugin_manager->call($plugin_name, 'block', $argument);
+            if (defined($result)) {
+                push(@result, splice(@saved));
+            } else {
+                $result = $original_line;
+            }
+            push(@result, $result);
+        } else {
+            push(@result, &inline($_));
+        }
+    }
+    push(@result, splice(@saved));
+
+    if ($option{toc}) {
+        # Convert @toc (table of contents) to HTML.
+        # This part is taken from Makio Tsukamoto's WalWiki.
+        my (@tocsaved, @tocresult);
+        foreach (@toc) {
+            if (/^(-{1,3})(.*)/) {
+                &back_push('ul', length($1), \@tocsaved, \@tocresult);
+                push(@tocresult, '<li>' . $2 . '</li>');
+            }
+        }
+        push(@tocresult, splice(@tocsaved));
+
+        # Insert "table of contents".
+        if (@tocresult) {
+            unshift(@tocresult, qq(<h2>$resource{table_of_contents}</h2>));
+        }
+
+        return join("\n", @tocresult, @result);
+    } else {
+        return join("\n", @result);
+    }
+}
+
+sub back_push {
+    my ($tag, $level, $savedref, $resultref, $attr) = @_;
+    while (@$savedref > $level) {
+        push(@$resultref, shift(@$savedref));
+    }
+    if ($savedref->[0] ne "</$tag>") {
+        push(@$resultref, splice(@$savedref));
+    }
+    while (@$savedref < $level) {
+        unshift(@$savedref, "</$tag>");
+        push(@$resultref, "<$tag$attr>");
+    }
+}
+
+sub remove_tag {
+    my ($line) = @_;
+    $line =~ s|\<\/?[A-Za-z][^>]*?\>||g;
+    return $line;
+}
+
+sub inline {
+    my ($line) = @_;
+    $line = &escape($line);
+    $line =~ s|'''([^']+?)'''|<i>$1</i>|g;  # Italic
+    $line =~ s|''([^']+?)''|<b>$1</b>|g;    # Bold
+    $line =~ s|(\d\d\d\d-\d\d-\d\d \(\w\w\w\) \d\d:\d\d:\d\d)|<span class="date">$1</span>|g;   # Date
+    $line =~ s!
+                (
+                    ((mailto|http|https|ftp):([^\x00-\x20()<>\x7F-\xFF])*)  # Direct http://...
+                        |
+                    ($bracket_name)             # [[likethis]], [[#comment]], [[Friend:remotelink]]
+                        |
+                    ($interwiki_definition)     # [[Friend http://somewhere/?q=sjis($1)]]
+                        |
+                    ($wiki_name)                # LocalLinkLikeThis
+                        |
+                    ($inline_plugin)            # &user_defined_plugin(123,hello)
+                )
+            !
+                &make_link($1)
+            !gex;
+    return $line;
+}
+
+sub make_link {
+    my $chunk = shift;
+    if ($chunk =~ /^(http|https|ftp):/) {
+        if ($use_autoimg and $chunk =~ /\.(gif|png|jpeg|jpg)$/) {
+            return qq(<a href="$chunk"><img src="$chunk"></a>);
+        } else {
+            return qq(<a href="$chunk">$chunk</a>);
+        }
+    } elsif ($chunk =~ /^(mailto):(.*)/) {
+        return qq(<a href="$chunk">$2</a>);
+    } elsif ($chunk =~ /^$interwiki_definition$/) {
+        return qq(<span class="InterWiki">$chunk</span>);
+    } elsif ($chunk =~ /^$embedded_name$/) {
+        return &embedded_to_html($chunk);
+    } elsif ($chunk =~ /^$inline_plugin$/) {
+        # InlinePlugin.
+        my $plugin_name = $1;
+        my $argument = $2;
+        my $result = $plugin_manager->call($plugin_name, 'inline', $argument);
+        if (defined($result)) {
+            return $result;
+        } else {
+            return $chunk;
+        }
+    } else {
+        $chunk = &unarmor_name($chunk);
+        $chunk = &unescape($chunk); # To treat '&' or '>' or '<' correctly.
+        my $cookedchunk = &encode($chunk);
+        my $escapedchunk = &escape($chunk);
+        if ($chunk =~ /^$interwiki_name$/) {
+            my ($intername, $localname) = ($1, $2);
+            my $remoteurl = $interwiki{$intername};
+            if ($remoteurl =~ /^(http|https|ftp):\/\//) { # Check if scheme if valid.
+                $remoteurl =~ s/\b(euc|sjis|ykwk|asis)\(\$1\)/&interwiki_convert($1, $localname)/e;
+                return qq(<a href="$remoteurl">$escapedchunk</a>);
+            } else {
+                return $escapedchunk;
+            }
+        } elsif ($database{$chunk}) {
+            my $subject = &escape(&get_subjectline($chunk, delimiter => ''));
+            return qq(<a title="$subject" href="$url_cgi?$cookedchunk">$escapedchunk</a>);
+        } elsif ($page_command{$chunk}) {
+            return qq(<a title="$escapedchunk" href="$url_cgi?$cookedchunk">$escapedchunk</a>);
+        } else {
+            return qq($escapedchunk<a title="$resource{editthispage}" class="editlink" href="$url_cgi?mycmd=edit&amp;mypage=$cookedchunk">$editchar</a>);
+        }
+    }
+}
+
+sub print_message {
+    my ($msg) = @_;
+    print qq(<p><strong>$msg</strong></p>);
+}
+
+sub init_form {
+    if (param()) {
+        foreach my $var (param()) {
+            $form{$var} = param($var);
+        }
+    } else {
+        $ENV{QUERY_STRING} = $FrontPage;
+    }
+
+    my $query = &decode($ENV{QUERY_STRING});
+    if ($page_command{$query}) {
+        $form{mycmd} = $page_command{$query};
+        $form{mypage} = $query;
+    } elsif ($query =~ /^($wiki_name)$/) {
+        $form{mycmd} = 'read';
+        $form{mypage} = $1;
+    } elsif ($database{$query}) {
+        $form{mycmd} = 'read';
+        $form{mypage} = $query;
+    }
+
+    # mypreview_edit        -> do_edit, with preview.
+    # mypreview_adminedit   -> do_adminedit, with preview.
+    # mypreview_write       -> do_write, without preview.
+    foreach (keys %form) {
+        if (/^mypreview_(.*)$/) {
+            $form{mycmd} = $1;
+            $form{mypreview} = 1;
+        }
+    }
+
+    #
+    # $form{mycmd} is frozen here.
+    #
+
+    $form{mymsg} = &code_convert(\$form{mymsg}, $kanjicode);
+    $form{myname} = &code_convert(\$form{myname}, $kanjicode);
+}
+
+sub update_recent_changes {
+    my $update = "- @{[&get_now]} @{[&armor_name($form{mypage})]} @{[&get_subjectline($form{mypage})]}";
+    my @oldupdates = split(/\r?\n/, $database{$RecentChanges});
+    my @updates;
+    foreach (@oldupdates) {
+        /^\- \d\d\d\d\-\d\d\-\d\d \(...\) \d\d:\d\d:\d\d (\S+)/;    # date format.
+        my $name = &unarmor_name($1);
+        if (&is_exist_page($name) and ($name ne $form{mypage})) {
+            push(@updates, $_);
+        }
+    }
+    if (&is_exist_page($form{mypage})) {
+        unshift(@updates, $update);
+    }
+    splice(@updates, $maxrecent + 1);
+    $database{$RecentChanges} = join("\n", @updates);
+    if ($file_touch) {
+        open(FILE, "> $file_touch");
+        print FILE localtime() . "\n";
+        close(FILE);
+    }
+    if ($file_rss) {
+        &update_rssfile;
+    }
+}
+
+sub get_subjectline {
+    my ($page, %option) = @_;
+    if (not &is_editable($page)) {
+        return "";
+    } else {
+        # Delimiter check.
+        my $delim = $subject_delimiter;
+        if (defined($option{delimiter})) {
+            $delim = $option{delimiter};
+        }
+
+        # Get the subject of the page.
+        my $subject = $database{$page};
+        $subject =~ s/\r?\n.*//s;
+        return "$delim$subject";
+    }
+}
+
+sub send_mail_to_admin {
+    my ($page, $mode) = @_;
+    return unless $modifier_sendmail;
+    my $message = <<"EOD";
+To: $modifier_mail
+From: $modifier_mail
+Subject: [Wiki/$mode]
+MIME-Version: 1.0
+Content-Type: text/plain; charset=ISO-2022-JP
+Content-Transfer-Encoding: 7bit
+
+--------
+MODE = $mode
+REMOTE_ADDR = $ENV{REMOTE_ADDR}
+REMOTE_HOST = $ENV{REMOTE_HOST}
+--------
+$page
+--------
+$database{$page}
+--------
+EOD
+    &code_convert(\$message, 'jis');
+    open(MAIL, "| $modifier_sendmail");
+    print MAIL $message;
+    close(MAIL);
+}
+
+sub open_db {
+    if ($modifier_dbtype eq 'dbmopen') {
+        dbmopen(%database, $dataname, 0666) or &print_error("(dbmopen) $dataname");
+        dbmopen(%infobase, $infoname, 0666) or &print_error("(dbmopen) $infoname");
+    } elsif ($modifier_dbtype eq 'AnyDBM_File') {
+        tie(%database, "AnyDBM_File", $dataname, O_RDWR|O_CREAT, 0666) or &print_error("(tie AnyDBM_File) $dataname");
+        tie(%infobase, "AnyDBM_File", $infoname, O_RDWR|O_CREAT, 0666) or &print_error("(tie AnyDBM_File) $infoname");
+	} elsif ($modifier_dbtype eq 'Cassandra::CassHash') {
+		#use cassandra
+        tie(%database, "Cassandra::CassHash","localhost",9161,"Keyspace1","Standard1","yukiwiki3") or &print_error("(tie Cassandra::CassHash) $dataname");
+        tie(%infobase, "Cassandra::CassHash","localhost",9161,"Keyspace1","Standard1","yukiwiki5") or &print_error("(tie Cassandra::CassHash) $infoname");
+    } else {
+        tie(%database, "Yuki::YukiWikiDB", $dataname) or &print_error("(tie Yuki::YukiWikiDB) $dataname");
+        tie(%infobase, "Yuki::YukiWikiDB", $infoname) or &print_error("(tie Yuki::YukiWikiDB) $infoname");
+    }
+}
+
+sub close_db {
+    if ($modifier_dbtype eq 'dbmopen') {
+        dbmclose(%database);
+        dbmclose(%infobase);
+    } elsif ($modifier_dbtype eq 'AnyDBM_File') {
+        untie(%database);
+        untie(%infobase);
+    } else {
+        untie(%database);
+        untie(%infobase);
+    }
+}
+
+sub open_diff {
+    if ($modifier_dbtype eq 'dbmopen') {
+        dbmopen(%diffbase, $diffname, 0666) or &print_error("(dbmopen) $diffname");
+    } elsif ($modifier_dbtype eq 'AnyDBM_File') {
+        tie(%diffbase, "AnyDBM_File", $diffname) or &print_error("(tie AnyDBM_File) $diffname");
+	} elsif ($modifier_dbtype eq 'Cassandra::CassHash') {
+		#use cassandra
+        tie(%diffbase, "Cassandra::CassHash","localhost",9161,"Keyspace1","Standard1","yukiwiki4") or &print_error("(tie Cassandra::CassHash) $diffname");
+    } else {
+        tie(%diffbase, "Yuki::YukiWikiDB", $diffname) or &print_error("(tie Yuki::YukiWikiDB) $diffname");
+    }
+}
+
+sub close_diff {
+    if ($modifier_dbtype eq 'dbmopen') {
+        dbmclose(%diffbase);
+    } elsif ($modifier_dbtype eq 'AnyDBM_File') {
+        untie(%diffbase);
+    } else {
+        untie(%diffbase);
+    }
+}
+
+sub print_searchform {
+    my ($word) = @_;
+    print <<"EOD";
+<form action="$url_cgi" method="get">
+    <input type="hidden" name="mycmd" value="search">
+    <input type="text" name="mymsg" value="$word" size="20">
+    <input type="submit" value="$resource{searchbutton}">
+</form>
+EOD
+}
+
+sub print_editform {
+    my ($mymsg, $conflictchecker, %mode) = @_;
+    my $frozen = &is_frozen($form{mypage});
+
+    if ($form{mypreview}) {
+        if ($form{mymsg}) {
+            unless ($mode{conflict}) {
+                print qq(<h3>$resource{previewtitle}</h3>\n);
+                print qq($resource{previewnotice}\n);
+                print qq(<div class="preview">\n);
+                &print_content($form{mymsg});
+                print qq(</div>\n);
+            }
+        } else {
+            print qq($resource{previewempty});
+        }
+        $mymsg = &escape($form{mymsg});
+    } else {
+        $mymsg = &escape($mymsg);
+    }
+
+    my $edit = $mode{admin} ? 'adminedit' : 'edit';
+    my $escapedmypage = &escape($form{mypage});
+    my $escapedmypassword = &escape($form{mypassword});
+
+    print <<"EOD";
+<form action="$url_cgi" method="post">
+    @{[ $mode{admin} ? qq($resource{frozenpassword} <input type="password" name="mypassword" value="$escapedmypassword" size="10"><br>) : "" ]}
+    <input type="hidden" name="myConflictChecker" value="$conflictchecker">
+    <input type="hidden" name="mypage" value="$escapedmypage">
+    <textarea cols="$cols" rows="$rows" name="mymsg">
+$mymsg</textarea><br>
+@{[
+    $mode{admin} ?
+    qq(
+    <input type="radio" name="myfrozen" value="1" @{[$frozen ? qq(checked="checked") : ""]}>$resource{frozenbutton}
+    <input type="radio" name="myfrozen" value="0" @{[$frozen ? "" : qq(checked="checked")]}>$resource{notfrozenbutton}<br>)
+    : ""
+]}
+@{[
+    $mode{conflict} ? "" :
+    qq(
+        <input type="checkbox" name="mytouch" value="on" checked="checked">$resource{touch}<br>
+        <input type="submit" name="mypreview_$edit" value="$resource{previewbutton}">
+        <input type="submit" name="mypreview_write" value="$resource{savebutton}"><br>
+    )
+]}
+</form>
+EOD
+    unless ($mode{conflict}) {
+        # Show the format rule.
+        open(FILE, $file_format) or &print_error("($file_format)");
+        my $content = join('', <FILE>);
+        &code_convert(\$content, $kanjicode);
+        close(FILE);
+        print &text_to_html($content, toc=>0);
+    }
+
+    unless ($mode{conflict}) {
+        # Show plugin information.
+        my $plugin_usage = <<"EOD";
+*$resource{available_plugins}
+EOD
+        foreach my $usage (@{$plugin_manager->usage}) {
+            $plugin_usage .= <<"EOD";
+** $usage->{name}
+---(
+$resource{plugin_usage_name}: $usage->{name}
+$resource{plugin_usage_version}: $usage->{version}
+$resource{plugin_usage_author}: $usage->{author}
+$resource{plugin_usage_syntax}: $usage->{syntax}
+$resource{plugin_usage_description}: $usage->{description}
+$resource{plugin_usage_example}: $usage->{example}
+---)
+EOD
+        }
+        &code_convert(\$plugin_usage, $kanjicode);
+        print &text_to_html($plugin_usage, toc=>0);
+    }
+}
+
+sub print_passwordform {
+        print <<"EOD";
+<form action="$url_cgi" method="post">
+    <input type="hidden" name="mycmd" value="adminchangepassword">
+    $resource{oldpassword} <input type="password" name="myoldpassword" size="10"><br>
+    $resource{newpassword} <input type="password" name="mynewpassword" size="10"><br>
+    $resource{newpassword2} <input type="password" name="mynewpassword2" size="10"><br>
+    <input type="submit" value="$resource{changepasswordbutton}"><br>
+</form>
+EOD
+}
+
+sub is_editable {
+    my ($page) = @_;
+    if (&is_bracket_name($page)) {
+        return 0;
+    } elsif ($fixedpage{$page}) {
+        return 0;
+    } elsif ($page =~ /\s/) {
+        return 0;
+    } elsif ($page =~ /^\#/) {
+        return 0;
+    } elsif ($page =~ /^$interwiki_name$/) {
+        return 0;
+    } elsif (not $page) {
+        return 0;
+    } else {
+        return 1;
+    }
+}
+
+# armor_name:
+#   WikiName -> WikiName
+#   not_wiki_name -> [[not_wiki_name]]
+sub armor_name {
+    my ($name) = @_;
+    if ($name =~ /^$wiki_name$/) {
+        return $name;
+    } else {
+        return "[[$name]]";
+    }
+}
+
+# unarmor_name:
+#   [[bracket_name]] -> bracket_name
+#   WikiName -> WikiName
+sub unarmor_name {
+    my ($name) = @_;
+    if ($name =~ /^$bracket_name$/) {
+        return $1;
+    } else {
+        return $name;
+    }
+}
+
+sub is_bracket_name {
+    my ($name) = @_;
+    if ($name =~ /^$bracket_name$/) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+sub decode {
+    my ($s) = @_;
+    $s =~ tr/+/ /;
+    $s =~ s/%([A-Fa-f0-9][A-Fa-f0-9])/pack("C", hex($1))/eg;
+    return $s;
+}
+
+# Thanks to WalWiki for [better encode].
+sub encode {
+    my ($encoded) = @_;
+    $encoded =~ s/(\W)/'%' . unpack('H2', $1)/eg;
+    return $encoded;
+}
+
+sub init_resource {
+    open(FILE, $file_resource) or &print_error("(resource)");
+    while (<FILE>) {
+        chomp;
+        next if /^#/;
+        my ($key, $value) = split(/=/, $_, 2);
+        $resource{$key} = &code_convert(\$value, $kanjicode);
+    }
+    close(FILE);
+}
+
+sub conflict {
+    my ($page, $rawmsg) = @_;
+    if ($form{myConflictChecker} eq &get_info($page, $info_ConflictChecker)) {
+        return 0;
+    }
+    open(FILE, $file_conflict) or &print_error("(conflict)");
+    my $content = join('', <FILE>);
+    &code_convert(\$content, $kanjicode);
+    close(FILE);
+    &print_header($page);
+    &print_content($content);
+    &print_editform($rawmsg, $form{myConflictChecker}, frozen=>0, conflict=>1);
+    &print_footer($page);
+    return 1;
+}
+
+sub get_now {
+    my (@week) = qw(Sun Mon Tue Wed Thu Fri Sat);
+    my ($sec, $min, $hour, $day, $mon, $year, $weekday) = localtime(time);
+    $year += 1900;
+    $mon++;
+    $mon = "0$mon" if $mon < 10;
+    $day = "0$day" if $day < 10;
+    $hour = "0$hour" if $hour < 10;
+    $min = "0$min" if $min < 10;
+    $sec = "0$sec" if $sec < 10;
+    $weekday = $week[$weekday];
+    return "$year-$mon-$day ($weekday) $hour:$min:$sec";
+}
+
+# [[YukiWiki http://www.hyuki.com/yukiwiki/wiki.cgi?euc($1)]]
+sub init_InterWikiName {
+    my $content = $database{$InterWikiName};
+    while ($content =~ /\[\[(\S+) +(\S+)\]\]/g) {
+        my ($name, $url) = ($1, $2);
+        $interwiki{$name} = $url;
+    }
+}
+
+sub interwiki_convert {
+    my ($type, $localname) = @_;
+    if ($type eq 'sjis' or $type eq 'euc') {
+        &code_convert(\$localname, $type);
+        return &encode($localname);
+    } elsif ($type eq 'ykwk') {
+        # for YukiWiki1
+        if ($localname =~ /^$wiki_name$/) {
+            return $localname;
+        } else {
+            &code_convert(\$localname, 'sjis');
+            return &encode("[[" . $localname . "]]");
+        }
+    } elsif ($type eq 'asis') {
+        return $localname;
+    } else {
+        return $localname;
+    }
+}
+
+sub get_info {
+    my ($page, $key) = @_;
+    my %info = map { split(/=/, $_, 2) } split(/\n/, $infobase{$page});
+    return $info{$key};
+}
+
+sub set_info {
+    my ($page, $key, $value) = @_;
+    my %info = map { split(/=/, $_, 2) } split(/\n/, $infobase{$page});
+    $info{$key} = $value;
+    my $s = '';
+    for (keys %info) {
+        $s .= "$_=$info{$_}\n";
+    }
+    $infobase{$page} = $s;
+}
+
+sub frozen_reject {
+    my ($isfrozen) = &get_info($form{mypage}, $info_IsFrozen);
+    my ($willbefrozen) = $form{myfrozen};
+    if (not $isfrozen and not $willbefrozen) {
+        # You need no check.
+        return 0;
+    } elsif (valid_password($form{mypassword})) {
+        # You are admin.
+        return 0;
+    } else {
+        &print_error($resource{passworderror});
+        return 1;
+    }
+}
+
+sub length_reject {
+    if ($max_message_length < 0) {
+        return 0;
+    }
+    if ($max_message_length < length($form{mymsg})) {
+        &print_error($resource{toolongpost} . $max_message_length);
+        return 1;
+    }
+    return 0;
+}
+
+sub valid_password {
+    my ($givenpassword) = @_;
+    my ($validpassword_crypt) = &get_info($AdminSpecialPage, $info_AdminPassword);
+    if (crypt($givenpassword, $validpassword_crypt) eq $validpassword_crypt) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+sub is_frozen {
+    my ($page) = @_;
+    if (&get_info($page, $info_IsFrozen)) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+sub do_comment {
+    my ($content) = $database{$form{mypage}};
+    my $datestr = &get_now;
+    my $namestr = $form{myname} ? " ''[[$form{myname}]]'' : " : " ";
+    if ($content =~ s/(^|\n)(\Q$embed_comment\E)/$1- $datestr$namestr$form{mymsg}\n$2/) {
+        ;
+    } else {
+        $content =~ s/(^|\n)(\Q$embed_rcomment\E)/$1$2\n- $datestr$namestr$form{mymsg}/;
+    }
+    if ($form{mymsg}) {
+        $form{mymsg} = $content;
+        $form{mytouch} = 'on';
+        &do_write;
+    } else {
+        $form{mycmd} = 'read';
+        &do_read;
+    }
+}
+
+sub embedded_to_html {
+    my ($embedded) = @_;
+    my $escapedmypage = &escape($form{mypage});
+    if ($embedded eq $embed_comment or $embedded eq $embed_rcomment) {
+        my $conflictchecker = &get_info($form{mypage}, $info_ConflictChecker);
+        return <<"EOD";
+<form action="$url_cgi" method="post">
+    <input type="hidden" name="mycmd" value="comment">
+    <input type="hidden" name="mypage" value="$escapedmypage">
+    <input type="hidden" name="myConflictChecker" value="$conflictchecker">
+    <input type="hidden" name="mytouch" value="on">
+    $resource{yourname}
+    <input type="text" name="myname" value="" size="10">
+    <input type="text" name="mymsg" value="" size="40">
+    <input type="submit" value="$resource{commentbutton}">
+</form>
+EOD
+    } else {
+        return $embedded;
+    }
+}
+
+sub code_convert {
+    my ($contentref, $kanjicode) = @_;
+#   &Jcode::convert($contentref, $kanjicode);       # for Jcode.pm
+    &jcode::convert($contentref, $kanjicode);       # for jcode.pl
+    return $$contentref;
+}
+
+sub test_convert {
+    my $txt = &text_to_html(<<"EOD", toc=>1);
+*HEADER1
+**HEADER1-1
+-ITEM1
+-ITEM2
+-ITEM3
+PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1
+PAR1PAR1PAR1PAR1PAR1PAR1''BOLD''PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1
+PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1
+
+PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2
+PAR2PAR2PAR2PAR2PAR2PAR2'''ITALIC'''PAR2PAR2PAR2PAR2PAR2PAR2PAR2
+PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2
+**HEADER1-2
+:TERM1:DESCRIPTION1 AND ''BOLD''
+PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1
+PAR1PAR1PAR1PAR1PAR1PAR1''BOLD''PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1
+PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1
+:TERM2:DESCRIPTION2
+:TERM3:DESCRIPTION3
+----
+*HEADER2
+**HEADER2-1
+http://www.hyuki.com/
+**HEADER2-2
+
+[[YukiWiki2]]
+
+PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1
+PAR1PAR1PAR1PAR1PAR1PAR1'''''BOLD ITALIC'''''PAR1PAR1PAR1PAR1PAR1
+PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1PAR1
+>PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2
+>PAR2PAR2PAR2PAR2PAR2PAR2'''ITALIC'''PAR2PAR2PAR2PAR2PAR2PAR2PAR2
+>PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2PAR2
+
+LEVEL0LEVEL0LEVEL0LEVEL0LEVEL0LEVEL0LEVEL0
+
+>LEVEL1
+>LEVEL1
+>LEVEL1
+>>LEVEL2
+>>LEVEL2
+>>LEVEL2
+>>>LEVEL3
+-HELLO-1
+--HELLO-2
+(HELLO-2, HELLO-2, HELLO-2)
+---HELLO-3
+(HELLO-3, HELLO-3, HELLO-3)
+--HELLO-2
+---HELLO-3
+--HELLO-2
+---HELLO-3
+>>>LEVEL3
+>>>LEVEL3
+>>>LEVEL3
+>>>LEVEL3
+EOD
+    print $txt;
+    exit;
+}
+
+sub do_diff {
+    if (not &is_editable($form{mypage})) {
+        &do_read;
+        return;
+    }
+    &open_diff;
+    my $title = $form{mypage};
+    &print_header($title);
+    $_ = &escape($diffbase{$form{mypage}});
+    &close_diff;
+    print qq(<h3>$resource{difftitle}</h3>);
+    print qq($resource{diffnotice});
+    print qq(<pre class="diff">);
+    foreach (split(/\n/, $_)) {
+        if (/^\+(.*)/) {
+            print qq(<b class="added">$1</b>\n);
+        } elsif (/^\-(.*)/) {
+            print qq(<s class="deleted">$1</s>\n);
+        } elsif (/^\=(.*)/) {
+            print qq(<span class="same">$1</span>\n);
+        } else {
+            print qq|??? $_\n|;
+        }
+    }
+    print qq(</pre>);
+    print qq(<hr>);
+    &print_footer($title);
+}
+
+sub do_rss {
+    if ($file_rss) {
+        print <<"EOD";
+Status: 301 Moved Permanently
+Location: $modifier_rss_about
+
+EOD
+        return;
+    }
+}
+
+sub is_exist_page {
+    my ($name) = @_;
+    if ($use_exists) {
+        return exists($database{$name});
+    } else {
+        return $database{$name};
+    }
+}
+
+# sub check_modifiers {
+#     if ($error_AnyDBM_File and $modifier_dbtype eq 'AnyDBM_File') {
+#         &print_error($resource{anydbmfileerror});
+#     }
+# }
+
+# Initialize plugins.
+sub init_plugin {
+    $plugin_manager = new Yuki::PluginManager($plugin_context, $modifier_dir_plugin);
+}
+
+sub print_plugin_log {
+    if ($plugin_context->{debug}) {
+        print "<pre>(print_plugin_log)\n", join("\n", @{$plugin_manager->{log}}), "</pre>";
+    }
+}
+
+sub keyword_reject {
+    my $s = $form{mymsg};
+    my @reject_words = qw(
+buy-cheap.com
+ultram.online-buy.com
+    );
+    for (@reject_words) {
+        if ($s =~ /\Q$_\E/) {
+            &send_mail_to_admin($form{mypage}, "Rejectword: $_");
+            sleep(30);
+            return 1;
+        }
+    }
+    return 0;
+}
+
+# Thanks to Makio Tsukamoto for dc_date.
+sub update_rssfile {
+    my $rss = new Yuki::RSS(
+        version => '1.0',
+        encoding => $charset,
+    );
+    $rss->channel(
+        title => $modifier_rss_title,
+        link  => $modifier_rss_link,
+        about  => $modifier_rss_about,
+        description => $modifier_rss_description,
+    );
+    my $recentchanges = $database{$RecentChanges};
+    my $count = 0;
+    foreach (split(/\n/, $recentchanges)) {
+        last if ($count >= 15);
+        /^\- (\d\d\d\d\-\d\d\-\d\d) \(...\) (\d\d:\d\d:\d\d) (\S+)/;    # date format.
+        my $dc_date = "$1T$2$modifier_rss_timezone";
+        my $title = &unarmor_name($3);
+        my $escaped_title = &escape($title);
+        my $link = $modifier_rss_link . '?' . &encode($title);
+        my $description = $escaped_title . &escape(&get_subjectline($title));
+        $rss->add_item(
+            title => $escaped_title,
+            link  => $link,
+            description => $description,
+            dc_date => $dc_date,
+        );
+        $count++;
+    }
+    open(FILE, "> $file_rss") or &print_error("($file_rss)");
+    print FILE $rss->as_string;
+    close(FILE);
+}
+
+1;
+__END__
+=head1 NAME
+
+wiki.cgi - This is YukiWiki, yet another Wiki clone.
+
+=head1 DESCRIPTION
+
+YukiWiki is yet another Wiki clone.
+
+YukiWiki can treat Japanese WikiNames (enclosed with [[ and ]]).
+YukiWiki provides 'InterWiki' feature, RDF Site Summary (RSS),
+and some embedded commands (such as [[#comment]] to add comments).
+
+=head1 AUTHOR
+
+Hiroshi Yuki <hyuki@hyuki.com> http://www.hyuki.com/yukiwiki/
+
+=head1 LICENSE
+
+Copyright (C) 2000-2006 by Hiroshi Yuki.
+
+This program is free software; you can redistribute it and/or
+modify it under the same terms as Perl itself.
+
+=cut