たまには PukiWiki などを

• ref:http://twitter.com/wtnabe/statuses/466956942

PukiWiki ならプラグインを書けばさくっと実現できるよねー。
わりと適当に。といっても一応キャッシュ機構ぐらいはつけてあるけど。

<?php
define('PLUGIN_INCLUDEPAGE_USAGE', '#includepage(): Usage: #includepage(url[,class[,encoding]])');
define('PLUGIN_INCLUDEPAGE_CACHE_LIFETIME', 60 * 60);

function plugin_includepage_convert()
{
    $args = func_get_args();

    if (!in_array(count($args), array(1, 2, 3))) {
        return PLUGIN_INCLUDEPAGE_USAGE;
    }

    $url = array_shift($args);
    if (!preg_match('#^http://#', $url)) {
        return PLUGIN_INCLUDEPAGE_USAGE;
    }

    if (count($args) >= 1) {
        $class = array_shift($args);
    }

    if (count($args) >= 1) {
        $encoding = array_shift($args);
    }
    else {
        $encoding = 'auto';
    }

    $content = plugin_includepage_get_page_content($url);
    $content = mb_convert_encoding($content, SOURCE_ENCODING, $encoding);
    $escaped = htmlspecialchars($content);
    if (!empty($class)) {
        return sprintf('<pre class="%s">%s</pre>', htmlspecialchars($class, ENT_QUOTES), $escaped);
    }
    else {
        return sprintf('<pre>%s</pre>', $escaped);
    }
}

function plugin_includepage_get_page_content($url)
{
    $filename = CACHE_DIR . DIRECTORY_SEPARATOR . 'includepage.' . md5($url);
    if (!file_exists($filename) or time() - filemtime($filename) > PLUGIN_INCLUDEPAGE_CACHE_LIFETIME) {
        $content = file_get_contents($url);
        plugin_includepage_write_file($filename, $content);
        return $content;
    }
    else {
        return file_get_contents($filename);
    }
}

function plugin_includepage_write_file($filename, $content)
{
    $fp = fopen($filename, 'wb');
    if (!$fp) {
        return FALSE;
    }

    fwrite($fp, $content);
    fclose($fp);

    return TRUE;
}

?>