page: store placeholder values in $Page object

[minimedit.git] / page.php

diff --git a/page.php b/page.php
index 51ef900455c485d78bd770afaa59ea55d9ccce77..5eefadb5c8870e13ad8eeb045dce849f1ff258c3 100644 (file)
--- a/page.php
+++ b/page.php
@@ -2,33 +2,142 @@
 error_reporting(E_ALL);
 ini_set('display_errors', TRUE);
 
-$Args = '';
-$Page = preg_replace('/\?.*/', '', $_SERVER['REQUEST_URI']);
-$Page = urldecode(trim($Page, '/')) ?: 'index';
-while (TRUE) {
-       if (file_exists("$Page/index.html")) {
-               $Page .= '/index';
-               break;
-       }
-       if (file_exists("$Page.html")) {
-               break;
-       }
-       if (file_exists("$Page.php")) {
-               # unformatted script override
-               require "$Page.php";
+function abort($body, $status = NULL) {
+       if ($status) header("HTTP/1.1 $status");
+       print "$body\n";
+       exit;
+}
+
+# custom error handling
+
+define('DOCROOT', getcwd());
+set_include_path(implode(PATH_SEPARATOR, [ DOCROOT, __DIR__ ]));
+
+function fail($error)
+{
+       global $User, $Page;
+       http_response_code(500);
+       if (!isset($Page)) {
+               require_once('article.inc.php');
+               $Page = new ArchiveArticle(NULL);
+               $Page->title = 'Fout';
+       }
+       include_once 'page.inc.php';
+       ob_start();
+       require '500.inc.html';
+       $Page->place['debug'] = htmlspecialchars($error);
+       print $Page->render();
+}
+
+set_exception_handler('fail');
+
+define('E_FATAL', E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR | E_USER_ERROR);
+
+set_error_handler(function ($level, $error, $file, $line) {
+       if ($level & E_FATAL) {
+               fail($error);
+               return;
+       }
+       return FALSE;
+});
+
+register_shutdown_function(function () {
+       # display failure page for fatal exceptions
+       $error = error_get_last();
+       if (!($error['type'] & E_FATAL)) return;
+       fail("Fatal: $error[message] in $error[file]:$error[line]");
+});
+
+error_reporting(error_reporting() & ~E_FATAL);
+
+# user login and control
+
+include_once 'auth.inc.php'; // sets global $User
+$Edit = isset($_GET['edit']);
+
+# setup requested page
+
+$request = preg_replace('/\?.*/', '', @$_SERVER['PATH_INFO'] ?: $_SERVER['REQUEST_URI']);
+$request = urldecode(trim($request, '/')) ?: 'index';
+
+$staticpage = "$request.html";
+if (file_exists($staticpage)) {
+       if (is_link($staticpage)) {
+               $target = preg_replace('/\.html$/', '', readlink($staticpage));
+               header("HTTP/1.1 302 Shorthand");
+               header("Location: $target");
                exit;
        }
+}
+elseif (file_exists("$request/index.html")) {
+       $staticpage = "$request/index.html";
+}
+
+require_once('article.inc.php');
+$Page = new ArchiveArticle($staticpage);
+
+if ($Page->restricted) {
+       # access restriction
+       if (!$User->login) {
+               http_response_code(303);
+               $target = urlencode($Page->link);
+               header("Location: /login?goto=$target");
+               exit;
+       }
+}
+
+# prepare page contents
+
+header(sprintf('Content-Security-Policy: %s', implode('; ', [
+       "default-src 'self' 'unsafe-inline' http://cdn.ckeditor.com", # some overrides remain
+       "img-src 'self' data: http://cdn.ckeditor.com", # inline svg (in css)
+       "base-uri 'self'", # only local pages
+       "frame-ancestors 'none'", # prevent malicious embedding
+])));
+
+ob_start(); # page body
+$Page->place += [
+       'user'  => $User->login ?: '',
+       'url'   => htmlspecialchars($_SERVER['REQUEST_URI']),
+];
 
-       $up = strrpos($Page, '/');
-       if ($up === FALSE) {
+if (!isset($Page->raw) and $User->admin("edit {$Page->link}")) {
+       # open bottom template as initial contents
+       $template = 'template.inc.html';
+       if ($Page->handler and file_exists("{$Page->handler}/$template")) {
+               $template = "{$Page->handler}/$template";
+       }
+       $Page->raw($template);
+       $Page->meta['article:published_time'] = date('Y-m-d h:i:s O');
+       $Page->meta['article:author'] = '/' . $User->dir;
+}
+
+if (isset($Page->raw)) {
+       if ($User->admin("edit {$Page->link}")) {
+               # restore meta tags in static contents for editing
+               foreach (array_reverse($Page->meta) as $metaprop => $val) {
+                       $Page->raw = sprintf(
+                               '<meta property="%s" content="%s">'."\n",
+                               $metaprop, $val
+                       ) . $Page->raw;
+               }
+       }
+       $Page->raw = '<div class="static">'."\n\n".$Page->raw."</div>\n\n";
+}
+
+# output dynamic and/or static html
+
+if (!$Page->handler or require("./{$Page->handler}/index.php")) {
+       # static contents
+       if (isset($Page->raw)) {
+               print $Page->raw;
+       }
+       else {
+               # no resulting output
                http_response_code(404);
-               $Page = '404';
-               break;
+               @require '404.inc.html';
        }
-       $Args = substr($Page, $up) . $Args;
-       $Page = substr($Page, 0, $up);
 }
 
-$Edit = isset($_GET['edit']);
+include_once 'page.inc.php';
 
-include 'head.inc.php';