includes/Setup.php

   1 <?php
   2 # The main wiki script and things like database
   3 # conversion and maintenance scripts all share a
   4 # common setup of including lots of classes and
   5 # setting up a few globals.
   6 #
   7
   8 global $wgProfiling, $wgProfileSampleRate, $wgIP, $wgUseSquid;
   9
  10 if( !isset( $wgProfiling ) )
  11         $wgProfiling = false;
  12
  13 if ( $wgProfiling and (0 == rand() % $wgProfileSampleRate ) ) {
  14         require_once( 'Profiling.php' );
  15 } else {
  16         function wfProfileIn( $fn = '' ) {}
  17         function wfProfileOut( $fn = '' ) {}
  18         function wfGetProfilingOutput( $s, $e ) {}
  19         function wfProfileClose() {}
  20 }
  21
  22 /* collect the originating ips */
  23 if( $wgUseSquid && isset( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
  24         # If the web server is behind a reverse proxy, we need to find
  25         # out where our requests are really coming from.
  26         $hopips = array_map( 'trim', explode( ',', $_SERVER['HTTP_X_FORWARDED_FOR'] ) );
  27
  28         while(in_array(trim(end($hopips)), $wgSquidServers)){
  29                 array_pop($hopips);
  30         }
  31         $wgIP = trim(end($hopips));
  32 } else {
  33         $wgIP = getenv('REMOTE_ADDR');
  34 }
  35
  36
  37 $fname = 'Setup.php';
  38 wfProfileIn( $fname );
  39 global $wgUseDynamicDates;
  40 wfProfileIn( $fname.'-includes' );
  41
  42 require_once( 'GlobalFunctions.php' );
  43 require_once( 'Namespace.php' );
  44 require_once( 'RecentChange.php' );
  45 require_once( 'User.php' );
  46 require_once( 'Skin.php' );
  47 require_once( 'OutputPage.php' );
  48 require_once( 'LinkCache.php' );
  49 require_once( 'Title.php' );
  50 require_once( 'Article.php' );
  51 require_once( 'MagicWord.php' );
  52 require_once( 'memcached-client.php' );
  53 require_once( 'Block.php' );
  54 require_once( 'SearchEngine.php' );
  55 require_once( 'DifferenceEngine.php' );
  56 require_once( 'MessageCache.php' );
  57 require_once( 'BlockCache.php' );
  58 require_once( 'Parser.php' );
  59 require_once( 'ParserCache.php' );
  60 require_once( 'WebRequest.php' );
  61 require_once( 'LoadBalancer.php' );
  62
  63 $wgRequest = new WebRequest();
  64
  65
  66
  67 wfProfileOut( $fname.'-includes' );
  68 wfProfileIn( $fname.'-memcached' );
  69 global $wgUser, $wgLang, $wgOut, $wgTitle;
  70 global $wgArticle, $wgDeferredUpdateList, $wgLinkCache;
  71 global $wgMemc, $wgMagicWords, $wgMwRedir, $wgDebugLogFile;
  72 global $wgMessageCache, $wgUseMemCached, $wgUseDatabaseMessages;
  73 global $wgMsgCacheExpiry, $wgCommandLineMode;
  74 global $wgBlockCache, $wgParserCache, $wgParser, $wgDBConnections;
  75 global $wgLoadBalancer, $wgDBservers;
  76 global $wgDBserver, $wgDBuser, $wgDBpassword, $wgDBname, $wgDBtype;
  77
  78 # Useful debug output
  79 if ( $wgCommandLineMode ) {
  80         # wfDebug( '"' . implode( '"  "', $argv ) . '"' );
  81 } elseif ( function_exists( 'getallheaders' ) ) {
  82         wfDebug( "\nStart request\n" );
  83         wfDebug( $_SERVER['REQUEST_METHOD'] . ' ' . $_SERVER['REQUEST_URI'] . "\n" );
  84         $headers = getallheaders();
  85         foreach ($headers as $name => $value) {
  86                 wfDebug( "$name: $value\n" );
  87         }
  88         wfDebug( "\n" );
  89 } else {
  90         wfDebug( $_SERVER['REQUEST_METHOD'] . ' ' . $_SERVER['REQUEST_URI'] . "\n" );
  91 }
  92
  93 # Set up Memcached
  94 #
  95 class MemCachedClientforWiki extends memcached {
  96         function _debugprint( $text ) {
  97                 wfDebug( "memcached: $text\n" );
  98         }
  99 }
 100
 101 # FakeMemCachedClient imitates the API of memcached-client v. 0.1.2.
 102 # It acts as a memcached server with no RAM, that is, all objects are
 103 # cleared the moment they are set. All set operations succeed and all
 104 # get operations return null.
 105
 106 class FakeMemCachedClient {
 107         function add ($key, $val, $exp = 0) { return true; }
 108         function decr ($key, $amt=1) { return null; }
 109         function delete ($key, $time = 0) { return false; }
 110         function disconnect_all () { }
 111         function enable_compress ($enable) { }
 112         function forget_dead_hosts () { }
 113         function get ($key) { return null; }
 114         function get_multi ($keys) { return array_pad(array(), count($keys), null); }
 115         function incr ($key, $amt=1) { return null; }
 116         function replace ($key, $value, $exp=0) { return false; }
 117         function run_command ($sock, $cmd) { return null; }
 118         function set ($key, $value, $exp=0){ return true; }
 119         function set_compress_threshold ($thresh){ }
 120         function set_debug ($dbg) { }
 121         function set_servers ($list) { }
 122 }
 123
 124 if( $wgUseMemCached ) {
 125         $wgMemc = new MemCachedClientforWiki( array('persistant' => true) );
 126         $wgMemc->set_servers( $wgMemCachedServers );
 127         $wgMemc->set_debug( $wgMemCachedDebug );
 128
 129         # Test it to see if it's working
 130         # This is necessary because otherwise wfMsg would be extremely inefficient
 131         if ( !$wgMemc->set( 'test', '', 0 ) ) {
 132                 wfDebug( "Memcached failed setup test - connection error?\n" );
 133                 $wgUseMemCached = false;
 134                 $wgMemc = new FakeMemCachedClient();
 135         }
 136         $messageMemc = &$wgMemc;
 137 } else {
 138         $wgMemc = new FakeMemCachedClient();
 139
 140         # Give the message cache a separate cache in the DB.
 141         # This is a speedup over separately querying every message used
 142         require_once( 'ObjectCache.php' );
 143         $messageMemc = new MediaWikiBagOStuff('objectcache');
 144 }
 145
 146 wfProfileOut( $fname.'-memcached' );
 147 wfProfileIn( $fname.'-database' );
 148
 149 if ( !$wgDBservers ) {
 150         $wgDBservers = array(array(
 151                 'host' => $wgDBserver,
 152                 'user' => $wgDBuser,
 153                 'password' => $wgDBpassword,
 154                 'dbname' => $wgDBname,
 155                 'type' => $wgDBtype,
 156                 'load' => 1
 157         ));
 158 }
 159 $wgLoadBalancer = LoadBalancer::newFromParams( $wgDBservers );
 160 $wgLoadBalancer->force(0);
 161
 162 wfProfileOut( $fname.'-database' );
 163 wfProfileIn( $fname.'-language' );
 164 require_once( 'languages/Language.php' );
 165
 166 $wgMessageCache = new MessageCache;
 167
 168 $wgLangClass = 'Language' . ucfirst( $wgLanguageCode );
 169 if( ! class_exists( $wgLangClass ) || ($wgLanguageCode == 'en' && !$wgUseLatin1) ) {
 170         # Default to English/UTF-8
 171         require_once( 'languages/LanguageUtf8.php' );
 172         $wgLangClass = 'LanguageUtf8';
 173 }
 174
 175 $wgLang = new $wgLangClass();
 176 if ( !is_object($wgLang) ) {
 177         print "No language class ($wgLang)\N";
 178 }
 179
 180 if( $wgUseLatin1 && $wgLanguageCode != 'en' ) {
 181         # For non-UTF-8 non-English.
 182         require_once( 'languages/LanguageLatin1.php' );
 183         $xxx = new LanguageLatin1( $wgLang );
 184         unset( $wgLang );
 185         $wgLang = $xxx;
 186 }
 187 wfProfileOut( $fname.'-language' );
 188 wfProfileIn( $fname.'-MessageCache' );
 189
 190 $wgMessageCache->initialise( $messageMemc, $wgUseDatabaseMessages, $wgMsgCacheExpiry, $wgDBname );
 191
 192 wfProfileOut( $fname.'-MessageCache' );
 193 wfProfileIn( $fname.'-OutputPage' );
 194
 195 $wgOut = new OutputPage();
 196 wfDebug( "\n\n" );
 197
 198 wfProfileOut( $fname.'-OutputPage' );
 199 wfProfileIn( $fname.'-DateFormatter' );
 200
 201 if ( $wgUseDynamicDates ) {
 202         require_once( 'DateFormatter.php' );
 203         global $wgDateFormatter;
 204         $wgDateFormatter = new DateFormatter;
 205 }
 206
 207 wfProfileOut( $fname.'-DateFormatter' );
 208 wfProfileIn( $fname.'-SetupSession' );
 209
 210 if( !$wgCommandLineMode && ( isset( $_COOKIE[ini_get('session.name')] ) || isset( $_COOKIE[$wgDBname.'Password'] ) ) ) {
 211         User::SetupSession();
 212 }
 213
 214 wfProfileOut( $fname.'-SetupSession' );
 215 wfProfileIn( $fname.'-BlockCache' );
 216
 217 $wgBlockCache = new BlockCache( true );
 218
 219 wfProfileOut( $fname.'-BlockCache' );
 220 wfProfileIn( $fname.'-User' );
 221
 222 if( $wgCommandLineMode ) {
 223         # Used for some maintenance scripts; user session cookies can screw things up
 224         # when the database is in an in-between state.
 225         $wgUser = new User();
 226 } else {
 227         $wgUser = User::loadFromSession();
 228 }
 229
 230 wfProfileOut( $fname.'-User' );
 231 wfProfileIn( $fname.'-misc' );
 232
 233 $wgDeferredUpdateList = array();
 234 $wgLinkCache = new LinkCache();
 235 $wgMagicWords = array();
 236 $wgMwRedir =& MagicWord::get( MAG_REDIRECT );
 237 $wgParserCache = new ParserCache();
 238 $wgParser = new Parser();
 239 $wgOut->setParserOptions( ParserOptions::newFromUser( $wgUser ) );
 240 $wgDBConnections = array();
 241
 242 # Placeholders in case of DB error
 243 $wgTitle = Title::newFromText( wfMsg( 'badtitle' ) );
 244 $wgArticle = new Article($wgTitle);
 245
 246 wfProfileOut( $fname.'-misc' );
 247 wfProfileIn( $fname.'-extensions' );
 248
 249 # Extension setup functions
 250 # Entries should be added to this variable during the inclusion
 251 # of the extension file. This allows the extension to perform
 252 # any necessary initialisation in the fully initialised environment
 253 foreach ( $wgExtensionFunctions as $func ) {
 254         $func();
 255 }
 256
 257 wfProfileOut( $fname.'-extensions' );
 258 wfProfileOut( $fname );
 259
 260
 261 ?>