X-Git-Url: http://git.shiar.nl/minimedit.git/blobdiff_plain/2b56d0fa69a4608fb1b582fca5f08d343f5b90eb..v4.5-6-g50f9b29cc2:/page.php

diff --git a/page.php b/page.php
index f6c2346..8d2d01c 100644
--- a/page.php
+++ b/page.php
@@ -2,65 +2,146 @@
 error_reporting(E_ALL);
 ini_set('display_errors', TRUE);
 
-include_once 'auth.inc.php';
-$Edit = isset($_GET['edit']);
+function abort($body, $status = NULL) {
+	if ($status) header("HTTP/1.1 $status");
+	print "$body\n";
+	exit;
+}
 
-# distinguish subpage Args from topmost Page script
+# custom error handling
 
-$Args = '';
-$Page = preg_replace('/\?.*/', '', $_SERVER['REQUEST_URI']);
-$Page = urldecode(trim($Page, '/')) ?: 'index';
-while (TRUE) {
-	if (file_exists("$Page.php")) {
-		break;
-	}
+define('DOCROOT', getcwd());
+set_include_path(implode(PATH_SEPARATOR, [ DOCROOT, __DIR__ ]));
 
-	$up = strrpos($Page, '/');
-	$Args = substr($Page, $up) . $Args;
-	$Page = substr($Page, 0, $up);
-	if ($up === FALSE) {
-		break;
+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);
+	$Page->raw = ob_get_clean();
+	print $Page->render();
 }
 
-# execute dynamic code
+set_exception_handler('fail');
 
-$prepend = $append = '';
-if ($Page) {
-	require "./$Page.php";
-	if (ob_get_level() > 1) $append  = ob_get_clean();
-	if (ob_get_level() > 0) $prepend = ob_get_clean();
-}
+define('E_FATAL', E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR | E_USER_ERROR);
+
+set_error_handler(function ($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']);
 
-# prepare static contents
+# setup requested page
 
-include_once 'page.inc.php'; # global html
+$request = preg_replace('/\?.*/', '', @$_SERVER['PATH_INFO'] ?: $_SERVER['REQUEST_URI']);
+$request = urldecode(trim($request, '/')) ?: 'index';
 
-if (file_exists("$Page$Args/index.html")) {
-	$Args .= '/index';
+$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";
 }
 
-if (!$Page and !file_exists("$Page$Args.html")) {
-	# include not found
-	$Args = '';
-	if (isset($User) and $User['admin']) {
-		$Page = 'template';
+require_once('article.inc.php');
+$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;
 	}
-	else {
-		$Page = '404';
-		require "./$Page.php";
+}
+
+# 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
+])));
+
+$Page->place += [
+	'user'  => $User->login ?: '',
+	'url'   => htmlspecialchars($_SERVER['REQUEST_URI']),
+];
+
+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;
 }
 
-# output prepared html
+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";
+}
 
-print $prepend;
+# output dynamic and/or static html
 
-print '<div class="static">'."\n\n";
-if (file_exists("$Page$Args.html")) {
-include "./$Page$Args.html"; # static contents
+ob_start();
+if ($Page->handler and !require("./{$Page->handler}/index.php")) {
+	# replace contents by code output on false return
+	$Page->raw = ob_get_clean();
+}
+else {
+	# keep article contents
+	if (!isset($Page->raw)) {
+		# no resulting output
+		http_response_code(404);
+		@require '404.inc.html';
+		$Page->raw = ob_get_clean();
+	}
 }
-print "</div>\n\n";
 
-print $append;
+include_once 'page.inc.php';