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