122 lines
3.7 KiB
PHP
122 lines
3.7 KiB
PHP
<?php
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# Copyright (c) 2003-2005, Jannis Hermanns (on behalf the Serendipity Developer Team)
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# All rights reserved. See LICENSE file for licensing details
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/* This is a small hack to allow CSS display during installations and upgrades */
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define('IN_installer', true);
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define('IN_upgrader', true);
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define('IN_CSS', true);
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session_cache_limiter('public');
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if (!defined('S9Y_FRAMEWORK')) {
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include('serendipity_config.inc.php');
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}
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if (!isset($css_mode)) {
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if (!empty($serendipity['GET']['css_mode'])) {
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$css_mode = $serendipity['GET']['css_mode'];
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} else {
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$css_mode = 'serendipity.css';
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}
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}
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switch($css_mode) {
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case 'serendipity.css':
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default:
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$css_hook = 'css';
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$css_file = 'style.css';
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break;
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case 'serendipity_admin.css':
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// This constant is needed to properly set the template context for the backend.
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@define('IN_serendipity_admin', true);
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$css_hook = 'css_backend';
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$css_file = 'admin/style.css';
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break;
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}
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function serendipity_printStylesheet($file, $dir = '') {
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global $serendipity;
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return "/* $dir */\n" . str_replace(
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array(
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'{TEMPLATE_PATH}',
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'{LANG_DIRECTION}'
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),
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array(
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dirname($dir) . '/',
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LANG_DIRECTION
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),
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@file_get_contents($file, 1));
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}
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if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false) {
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header('Cache-Control: no-cache');
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} else {
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header('Cache-Control:');
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header('Pragma:');
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header('Expires: ' . gmdate('D, d M Y H:i:s \G\M\T', time()+3600));
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}
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header('Content-type: text/css; charset=' . LANG_CHARSET);
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if (IS_installed === false) {
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if (file_exists(S9Y_INCLUDE_PATH . 'templates/' . $serendipity['defaultTemplate'] . '/' . $css_file)) {
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echo serendipity_printStylesheet('templates/' . $serendipity['defaultTemplate'] . '/' . $css_file, 'templates/' . $serendipity['defaultTemplate'] . '/' . $css_file);
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}
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die();
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}
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// Use output buffering to capture all output. This is necessary
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// because a plugin might call 'echo' directly instead of adding
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// the desired output to the hook parameter '$out'.
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ob_start();
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// First all of our fallback classes, so they can be overridden by the usual template.
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$out = serendipity_printStylesheet(
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serendipity_getTemplateFile('style_fallback.css', 'serendipityPath'),
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serendipity_getTemplateFile('style_fallback.css', '')
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);
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$out .= serendipity_printStylesheet(
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serendipity_getTemplateFile($css_file, 'serendipityPath'),
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serendipity_getTemplateFile($css_file, '')
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);
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serendipity_plugin_api::hook_event($css_hook, $out);
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echo $out;
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//
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// Fetch output buffer containing the CSS output and create eTag header
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//
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$ob_buffer = ob_get_contents();
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if ($ob_buffer) {
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// Calculate hash for eTag and get request header. The hash value
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// changes with every modification to any part of the CSS styles.
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// This includes the installation of a plugin that adds plugin
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// specific styles.
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// Send ETag header using the hash value of the CSS code
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$hashValue = md5($ob_buffer);
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@header('ETag: "' . $hashValue . '"');
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// Compare value of If-None-Match header (if available) to hash value
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if (!empty($_SERVER['HTTP_IF_NONE_MATCH'])) {
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// Get request header value and chop off optional quotes
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$reqHeader = trim($_SERVER['HTTP_IF_NONE_MATCH'], '"');
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if ($hashValue === $reqHeader) {
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// Tell client to use the cached version and destroy output buffer
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@header('HTTP/1.1 304 Not Modified', true, 304);
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ob_clean();
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}
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}
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}
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ob_end_flush();
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/* vim: set sts=4 ts=4 expandtab : */
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