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( 'Skin.php' );
  46 require_once( 'OutputPage.php' );
  47 require_once( 'User.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
  62 $wgRequest = new WebRequest();
  63
  64
  65
  66 wfProfileOut( $fname.'-includes' );
  67 wfProfileIn( $fname.'-memcached' );
  68 global $wgUser, $wgLang, $wgOut, $wgTitle;
  69 global $wgArticle, $wgDeferredUpdateList, $wgLinkCache;
  70 global $wgMemc, $wgMagicWords, $wgMwRedir, $wgDebugLogFile;
  71 global $wgMessageCache, $wgUseMemCached, $wgUseDatabaseMessages;
  72 global $wgMsgCacheExpiry, $wgDBname, $wgCommandLineMode;
  73 global $wgBlockCache, $wgParserCache, $wgParser, $wgDontTrustMemcachedWithImportantStuff;
  74
  75 # Useful debug output
  76 if ( $wgCommandLineMode ) {
  77         # wfDebug( '"' . implode( '"  "', $argv ) . '"' );
  78 } elseif ( function_exists( 'getallheaders' ) ) {
  79         wfDebug( "\nStart request\n" );
  80         wfDebug( $_SERVER['REQUEST_METHOD'] . ' ' . $_SERVER['REQUEST_URI'] . "\n" );
  81         $headers = getallheaders();
  82         foreach ($headers as $name => $value) {
  83                 wfDebug( "$name: $value\n" );
  84         }
  85         wfDebug( "\n" );
  86 } else {
  87         wfDebug( $_SERVER['REQUEST_METHOD'] . ' ' . $_SERVER['REQUEST_URI'] . "\n" );
  88 }
  89
  90 # Set up Memcached
  91 #
  92 class MemCachedClientforWiki extends memcached {
  93         function _debugprint( $text ) {
  94                 wfDebug( "memcached: $text\n" );
  95         }
  96 }
  97
  98 # FakeMemCachedClient imitates the API of memcached-client v. 0.1.2.
  99 # It acts as a memcached server with no RAM, that is, all objects are
 100 # cleared the moment they are set. All set operations succeed and all
 101 # get operations return null.
 102
 103 class FakeMemCachedClient {
 104         function add ($key, $val, $exp = 0) { return true; }
 105         function decr ($key, $amt=1) { return null; }
 106         function delete ($key, $time = 0) { return false; }
 107         function disconnect_all () { }
 108         function enable_compress ($enable) { }
 109         function forget_dead_hosts () { }
 110         function get ($key) { return null; }
 111         function get_multi ($keys) { return array_pad(array(), count($keys), null); }
 112         function incr ($key, $amt=1) { return null; }
 113         function replace ($key, $value, $exp=0) { return false; }
 114         function run_command ($sock, $cmd) { return null; }
 115         function set ($key, $value, $exp=0){ return true; }
 116         function set_compress_threshold ($thresh){ }
 117         function set_debug ($dbg) { }
 118         function set_servers ($list) { }
 119 }
 120
 121 if( $wgUseMemCached ) {
 122         $wgMemc = new MemCachedClientforWiki( array('persistant' => true) );
 123         $wgMemc->set_servers( $wgMemCachedServers );
 124         $wgMemc->set_debug( $wgMemCachedDebug );
 125
 126         # Test it to see if it's working
 127         # This is necessary because otherwise wfMsg would be extremely inefficient
 128         if ( !$wgMemc->set( 'test', '', 0 ) ) {
 129                 wfDebug( "Memcached failed setup test - connection error?\n" );
 130                 $wgUseMemCached = false;
 131                 $wgMemc = new FakeMemCachedClient();
 132         }
 133         $messageMemc = &$wgMemc;
 134 } else {
 135         $wgMemc = new FakeMemCachedClient();
 136
 137         # Give the message cache a separate cache in the DB.
 138         # This is a speedup over separately querying every message used
 139         require_once( 'ObjectCache.php' );
 140         $messageMemc = new MediaWikiBagOStuff('objectcache');
 141 }
 142
 143 wfProfileOut( $fname.'-memcached' );
 144 wfProfileIn( $fname.'-language' );
 145 require_once( 'languages/Language.php' );
 146
 147 $wgMessageCache = new MessageCache;
 148
 149 $wgLangClass = 'Language' . ucfirst( $wgLanguageCode );
 150 if( ! class_exists( $wgLangClass ) || ($wgLanguageCode == 'en' && !$wgUseLatin1) ) {
 151         # Default to English/UTF-8
 152         require_once( 'languages/LanguageUtf8.php' );
 153         $wgLangClass = 'LanguageUtf8';
 154 }
 155
 156 $wgLang = new $wgLangClass();
 157 if ( !is_object($wgLang) ) {
 158         print "No language class ($wgLang)\N";
 159 }
 160
 161 if( $wgUseLatin1 && $wgLanguageCode != 'en' ) {
 162         # For non-UTF-8 non-English.
 163         require_once( 'languages/LanguageLatin1.php' );
 164         $xxx = new LanguageLatin1( $wgLang );
 165         unset( $wgLang );
 166         $wgLang = $xxx;
 167 }
 168 wfProfileOut( $fname.'-language' );
 169 wfProfileIn( $fname.'-MessageCache' );
 170
 171 $wgMessageCache->initialise( $messageMemc, $wgUseDatabaseMessages, $wgMsgCacheExpiry, $wgDBname );
 172
 173 wfProfileOut( $fname.'-MessageCache' );
 174 wfProfileIn( $fname.'-OutputPage' );
 175
 176 $wgOut = new OutputPage();
 177 wfDebug( "\n\n" );
 178
 179 wfProfileOut( $fname.'-OutputPage' );
 180 wfProfileIn( $fname.'-DateFormatter' );
 181
 182 if ( $wgUseDynamicDates ) {
 183         require_once( 'DateFormatter.php' );
 184         global $wgDateFormatter;
 185         $wgDateFormatter = new DateFormatter;
 186 }
 187
 188 wfProfileOut( $fname.'-DateFormatter' );
 189 wfProfileIn( $fname.'-SetupSession' );
 190
 191 if( !$wgCommandLineMode && ( isset( $_COOKIE[ini_get('session.name')] ) || isset( $_COOKIE[$wgDBname.'Password'] ) ) ) {
 192         User::SetupSession();
 193 }
 194
 195 wfProfileOut( $fname.'-SetupSession' );
 196 wfProfileIn( $fname.'-BlockCache' );
 197
 198 $wgBlockCache = new BlockCache( true );
 199
 200 wfProfileOut( $fname.'-BlockCache' );
 201 wfProfileIn( $fname.'-User' );
 202
 203 if( $wgCommandLineMode ) {
 204         # Used for some maintenance scripts; user session cookies can screw things up
 205         # when the database is in an in-between state.
 206         $wgUser = new User();
 207 } else {
 208         $wgUser = User::loadFromSession();
 209 }
 210
 211 wfProfileOut( $fname.'-User' );
 212 wfProfileIn( $fname.'-misc' );
 213
 214 $wgDeferredUpdateList = array();
 215 $wgLinkCache = new LinkCache();
 216 $wgMagicWords = array();
 217 $wgMwRedir =& MagicWord::get( MAG_REDIRECT );
 218 $wgParserCache = new ParserCache();
 219 $wgParser = new Parser();
 220 $wgOut->setParserOptions( ParserOptions::newFromUser( $wgUser ) );
 221
 222 # Placeholders in case of DB error
 223 $wgTitle = Title::newFromText( wfMsg( 'badtitle' ) );
 224 $wgArticle = new Article($wgTitle);
 225
 226 wfProfileOut( $fname.'-misc' );
 227 wfProfileIn( $fname.'-extensions' );
 228
 229 # Extension setup functions
 230 # Entries should be added to this variable during the inclusion
 231 # of the extension file. This allows the extension to perform
 232 # any necessary initialisation in the fully initialised environment
 233 foreach ( $wgExtensionFunctions as $func ) {
 234         $func();
 235 }
 236
 237 wfProfileOut( $fname.'-extensions' );
 238 wfProfileOut( $fname );
 239
 240
 241 ?>