page.php

   1 <?php
   2 error_reporting(E_ALL);
   3 ini_set('display_errors', TRUE);
   4
   5 function abort($body, $status = NULL) {
   6         if ($status) header("HTTP/1.1 $status");
   7         print "$body\n";
   8         exit;
   9 }
  10
  11 function getoutput($blocks = [])
  12 {
  13         $doc = ob_get_clean();
  14
  15         if (!empty($blocks['warn'])) {
  16                 $warn = '<p class="warn">[[warn]]</p>';
  17                 if ($offset = strpos($doc, '</h2>')) {
  18                         $doc = substr_replace($doc, "\n\n".$warn, $offset + 5, 0);
  19                 }
  20                 else {
  21                         $doc = $warn . "\n\n" . $doc;
  22                 }
  23         }
  24
  25         return preg_replace_callback(
  26                 '< \[\[ ([^] ]+) ([^]]*) \]\] >x',
  27                 function ($sub) use ($blocks) {
  28                         list ($placeholder, $name, $params) = $sub;
  29                         if (isset($blocks[$name])) {
  30                                 $html = $blocks[$name];
  31                         }
  32                         elseif (file_exists("$name.php")) {
  33                                 ob_start();
  34                                 $Page = $GLOBALS['Page'] . $GLOBALS['Args'];
  35                                 $Args = '';
  36                                 $Place = $GLOBALS['Place'];
  37                                 foreach (explode(' ', $params) as $param) {
  38                                         if ($set = strpos($param, '=')) {
  39                                                 $Place[ substr($param, 0, $set) ] = substr($param, $set + 1);
  40                                         }
  41                                         elseif (!empty($param)) {
  42                                                 $Args .= '/'.$param;
  43                                         }
  44                                 }
  45                                 try {
  46                                         include "$name.php";
  47                                         $html = ob_get_clean();
  48                                 }
  49                                 catch (Exception $e) {
  50                                         $html = sprintf('<strong class="warn">%s</strong>',
  51                                                 "fout in <em>$name</em>: {$e->getMessage()}"
  52                                         );
  53                                 }
  54                         }
  55                         else {
  56                                 $html = '<strong class="warn"><em>'.$name.'</em> ontbreekt</strong>';
  57                         }
  58                         return sprintf('<!--BLOCK:%s-->%s<!--/-->',
  59                                 is_numeric($name) ? '' : $placeholder, # edit replacement
  60                                 preg_replace('{<!--[^-]*-->}', '', $html) # contents
  61                         );
  62                 },
  63                 $doc
  64         );
  65 }
  66
  67 # custom error handling
  68
  69 define('DOCROOT', getcwd());
  70 set_include_path(implode(PATH_SEPARATOR, [ DOCROOT, __DIR__ ]));
  71
  72 function fail($error)
  73 {
  74         http_response_code(500);
  75         include_once 'page.inc.php';
  76         ob_start();
  77         require_once '500.html';
  78         print getoutput(['debug' => $error]);
  79 }
  80
  81 set_exception_handler('fail');
  82
  83 define('E_FATAL', E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR | E_USER_ERROR);
  84
  85 set_error_handler(function ($level, $error, $file, $line) {
  86         if ($level & E_FATAL) {
  87                 fail($error);
  88                 return;
  89         }
  90         return FALSE;
  91 });
  92
  93 register_shutdown_function(function () {
  94         # display failure page for fatal exceptions
  95         $error = error_get_last();
  96         if (!($error['type'] & E_FATAL)) return;
  97         fail("Fatal: $error[message] in $error[file]:$error[line]");
  98 });
  99
 100 error_reporting(error_reporting() & ~E_FATAL);
 101
 102 # user login and control
 103
 104 include_once 'auth.inc.php';
 105 $Edit = isset($_GET['edit']);
 106
 107 # distinguish subpage Args from topmost Page script
 108
 109 $Args = '';
 110 $Page = preg_replace('/\?.*/', '', @$_SERVER['PATH_INFO'] ?: $_SERVER['REQUEST_URI']);
 111 $Page = urldecode(trim($Page, '/')) ?: 'index';
 112 while (TRUE) {
 113         if (file_exists("$Page/.private")) {
 114                 # access restriction
 115                 if (empty($User)) {
 116                         http_response_code(303);
 117                         $target = urlencode($_SERVER['REQUEST_URI']);
 118                         header("Location: /login?goto=$target");
 119                         exit;
 120                 }
 121                 $PageAccess = $Page;
 122         }
 123
 124         if (file_exists("$Page/index.php")) {
 125                 break;
 126         }
 127
 128         $up = strrpos($Page, '/');
 129         $Args = substr($Page, $up) . $Args;
 130         $Page = substr($Page, 0, $up);
 131         if ($up === FALSE) {
 132                 break;
 133         }
 134 }
 135
 136 $staticpage = NULL;
 137 if (file_exists("$Page$Args.html")) {
 138         $staticpage = "$Page$Args.html";
 139 }
 140 elseif (file_exists("$Page$Args/index.html")) {
 141         $staticpage = "$Page$Args/index.html";
 142 }
 143 elseif (!empty($User['admin'])) {
 144         $staticpage = (file_exists("$Page/template.html") ? "$Page/template.html" : 'template.html');
 145 }
 146
 147 # load static contents
 148
 149 ob_start(); # page body
 150 ob_start(); # inner html
 151 print '<div class="static">'."\n\n";
 152
 153 $found = FALSE;
 154 if (isset($staticpage)) {
 155         $found = include "./$staticpage";
 156 }
 157
 158 print "</div>\n\n";
 159
 160 # execute dynamic code
 161
 162 $Place = [];
 163
 164 if ($Page) {
 165         $found |= require "./$Page/index.php";
 166 }
 167
 168 $Place += [
 169         'user'  => empty($User) ? '' : $User['name'],
 170         'url'   => htmlspecialchars($_SERVER['REQUEST_URI']),
 171 ];
 172
 173 # global html
 174
 175 if (!$found) {
 176         # no resulting output
 177         http_response_code(404);
 178         @require '404.html';
 179 }
 180
 181 include_once 'page.inc.php';
 182