source: t29-www/lib/technikum29.php @ 1468

Last change on this file since 1468 was 1106, checked in by heribert, 7 years ago

Bugfix im Cache-System: Bei interaktiven Seiten versuchte der Footer-Cache bislang, HTTP-Header auszusenden was in Warnungen resultierte. Fehler beseitigt, Warnungen sind weg.

  • Property svn:keywords set to Id
File size: 4.5 KB
Line 
1<?php
2/**
3 * technikum29v6 - PHP Subsystem.
4 * Haupteinstiegspunkt ("WebStart.php"), welches
5 * ohne weiteren Funktionsaufruf alles macht.
6 *
7 **/
8
9if(defined('T29')) return false; // no nesting
10define('T29', true);
11
12// is it an external call?
13$external = isset($external);
14
15// at least the $seiten_id must be defined
16if(!isset($seiten_id)) {
17        print "<html><pre>The t29v6 WebStart file\n";
18        print 'technikum29.php is the main include, but requires at least global <tt>$seiten_id</tt> to be defined.';
19        print "\n<a href='https://labs.technikum29.de/browser/technikum29%20Website/lib/technikum29.php'>Read my sourcecode</a>";
20        return false;
21}
22
23$lib = dirname(__FILE__);
24$webroot = realpath("$lib/../");  # file path to root of t29 web installation
25
26// early import host specific settings for making low level corrections like Bugfix #32
27require "$lib/host.php";
28$host = $external ? t29Host::create('t29ExternalHost') : t29Host::detect();
29$file = $host->slash_filename; # e.g.: "/de/page.php"
30
31// exactly define debugging behaviour
32if(isset($_GET['debug'])) {
33        $_GET['purge_cache'] = true;
34        $_GET['rl_debug'] = true;
35}
36
37// check for url rewriting neccessarity (skip at external calls)
38if($host->check_url_rewrite()) exit;
39
40$cache_dir = "$webroot/shared/cache";
41$languages = array(
42// shorthand => array(full name in page, path from webroot)
43        "de" => array("Deutsch",  "/de"),
44        "en" => array("English", "/en"),
45);
46
47// make sure we have a page title
48if(isset($title)) $titel = $title;
49elseif(isset($titel)) $title = $titel;
50else $titel = $title = false; // to be determined by navigation seiten_id.
51
52// try to determine the language from the file path
53if(!isset($lang)) $lang = substr($file, 1, 2);
54if(!in_array($lang, array_keys($languages))) $lang = "de"; # check if language exists
55$lang_path = $languages[$lang][1]; # shorthand, relative to webroot. use "$webroot$lang_path" for local.
56
57// "AJAX" calls are our meaning for pages without chrome
58$ajax = isset($_GET['ajax']);
59if(!$external && $ajax) {
60        // print only a minimal chrome, no caching.
61        require "$lib/ajax-template.php";
62        $ajax_tmpl = new t29AJAXTemplate($GLOBALS);
63        $ajax_tmpl->print_page();
64        // important: do not execute code further down (Templating stuff)
65        return true;
66}
67
68require "$lib/cache.php";
69
70// "External" pages which are not part of the t29 website
71if($external) {
72        // skip caching stuff. External pages don't get in touch with
73        // any navigation.xml or news.php etc.
74        require "$lib/template.php";
75        $header_cache = new t29Cache(/*debug*/false, /*verbose*/true, /*skip=memory only*/true);
76        $footer_cache = new t29Cache(/*debug*/false, /*verbose*/true, /*skip=memory only*/true);
77        $tmpl = new t29Template($GLOBALS);
78        $tmpl->create_separate_caches($header_cache, $footer_cache);
79        // important: do not execute caching stuff below
80        return true;
81}
82
83$page_cache = new t29Cache(false, true); // debug, verbose
84$page_cache->set_cache_file($webroot, $file);
85// You can define "$test_files" for additionall files to check. See e.g. /lib/sitemap.php
86$page_cache->test_files = isset($test_files) ? $test_files : array();
87$page_cache->test_files += array(
88        __FILE__,
89        $_SERVER['SCRIPT_FILENAME'],
90        "$lib/template.php",
91        "$lib/menu.php",
92        "$lib/messages.php",
93        "$lib/host.php",
94        "$webroot$lang_path/navigation.xml",
95        "$webroot$lang_path/news.php",
96        $webroot.$host->ressources_get_pagestyle($seiten_id),
97);
98
99// dynamical content:
100$static_page = !isset($dynamischer_inhalt);
101
102if(!$static_page) {
103        // Pages with dynamical content: only cache header and footer, seperately.
104        // they depend on same test files, so there is only one is_valid check.
105        $header_cache = $page_cache;
106        $footer_cache = clone $page_cache;
107
108        $header_cache->set_cache_file($webroot, $file.'-header');
109        $footer_cache->set_cache_file($webroot, $file.'-footer');
110}
111
112if($page_cache->shall_use()) {
113        if($static_page)
114                $page_cache->print_cache_and_exit();
115        else {
116                $header_cache->print_cache(true);
117                register_shutdown_function(function() use ($footer_cache) {
118                        $footer_cache->print_cache(true, /* skip http headers */ true);
119                });
120                // now print your dynamical stuff in your page, the
121                // footer content will be automatically added afterwards.
122        }
123} else {
124        // cache missed, rebuild cache
125        require "$lib/template.php";
126        $tmpl = new t29Template($GLOBALS);
127        if($static_page)
128                // rebuild complete site cache
129                $tmpl->create_cache($page_cache);
130        else
131                // rebuild each header and footer cache
132                $tmpl->create_separate_caches($header_cache, $footer_cache);
133}
134
135
136// end of technikum29.php
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