includes/MemcachedSessions.php

   1 <?php
   2 /**
   3  * This file gets included if $wgSessionsInMemcache is set in the config.
   4  * It redirects session handling functions to store their data in memcached
   5  * instead of the local filesystem. Depending on circumstances, it may also
   6  * be necessary to change the cookie settings to work across hostnames.
   7  * See: http://www.php.net/manual/en/function.session-set-save-handler.php
   8  *
   9  */
  10
  11 /**
  12  * @todo document
  13  */
  14 function memsess_key( $id ) {
  15         return wfMemcKey( 'session', $id );
  16 }
  17
  18 /**
  19  * @todo document
  20  */
  21 function memsess_open( $save_path, $session_name ) {
  22         # NOP, $wgMemc should be set up already
  23         return true;
  24 }
  25
  26 /**
  27  * @todo document
  28  */
  29 function memsess_close() {
  30         # NOP
  31         return true;
  32 }
  33
  34 /**
  35  * @todo document
  36  */
  37 function memsess_read( $id ) {
  38         global $wgMemc;
  39         $data = $wgMemc->get( memsess_key( $id ) );
  40         if( ! $data ) return '';
  41         return $data;
  42 }
  43
  44 /**
  45  * @todo document
  46  */
  47 function memsess_write( $id, $data ) {
  48         global $wgMemc;
  49         $wgMemc->set( memsess_key( $id ), $data, 3600 );
  50         return true;
  51 }
  52
  53 /**
  54  * @todo document
  55  */
  56 function memsess_destroy( $id ) {
  57         global $wgMemc;
  58         $wgMemc->delete( memsess_key( $id ) );
  59         return true;
  60 }
  61
  62 /**
  63  * @todo document
  64  */
  65 function memsess_gc( $maxlifetime ) {
  66         # NOP: Memcached performs garbage collection.
  67         return true;
  68 }
  69
  70 session_set_save_handler( 'memsess_open', 'memsess_close', 'memsess_read', 'memsess_write', 'memsess_destroy', 'memsess_gc' );
  71
  72 ?>