Mediawiki
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Mediawiki is the wiki software powering wikipedia. It can fairly easily be made to work with Raven. The Computing Service has been using a Raven-enabled copy of Mediawiki internally for some time. CARET have a Raven-enabled copy of Mediawiki that is available to the university - see http://wiki.caret.cam.ac.uk/
Software hacks, 1.5.2
These hacks all assume that the Mediawiki application is first protected by something that sets the REMOTE_USER apache server variable, such as the Raven Apache authentication module.
User.php
Line 60, newFromName, replace:
$t = Title::newFromText( $name );
with:
$t = Title::newFromText( $name , NS_USER );
To explicitly specify the namespace. This will be used to check in the hack in Title.php, below.
Line 153, idFromName:
$s = $dbr->selectRow( 'user', array( 'user_id' ), array( 'user_name' => $name ), $fname );
... and in the function loadFromSession():
if ( isset( $_SERVER["REMOTE_USER"] ) ) {
$sName = $_SERVER["REMOTE_USER"];
$sId = User::idFromName($sName);
$user = new User();
if ( $sId == 0 ) {
/* User doesn't exist here yet. */
$user->setName($sName);
$user->addToDatabase();
} else {
$user->mId = $sId;
$user->loadFromDatabase();
}
return $user;
}
Title.php
Stop the first letter of userpages being capitalised, so we can stick with CRSIDs being all lowercase everywhere. To do this, in the (private) function function secureAndSplit(), replace:
if( $wgCapitalLinks && $this->mInterwiki == '' ) {
$t = $wgContLang->ucfirst( $r );
} else {
$t = $r;
}
With:
if( $wgCapitalLinks && $this->mInterwiki == '' && NS_USER != $this->mNamespace ) {
$t = $wgContLang->ucfirst( $r );
} else {
$t = $r;
}
SkinTemplate.php
To remove the "log out" link at the top of the page, comment out the following section like so:
# $personal_urls['logout'] = array(
# 'text' => wfMsg('userlogout'),
# 'href' => $this->makeSpecialUrl('Userlogout','returnto=' . $this->thisurl )
# );
Software hacks, 1.9.4
These hacks all assume that the Mediawiki application is first protected by something that sets the REMOTE_USER apache server variable, such as the Raven Apache authentication module.
The hacks for 1.5.2 have been really useful, but I've had a couple of problems (maybe my fault as I notice this wiki is fine with both of these things):
- upload of files requires creation of a "real" wiki account, which Raven users can do, but is a slight faff
- changes are logged against IP rather than Raven ID
This media-wiki extension solves both of these problems, for me, and is easy to implement: Extension:AutomaticREMOTE USER
Documentation below in case the above disappears:
After installing mediawiki put the text below into: extensions/Auth_remoteuser.php
<?php
// vim:sw=2:softtabstop=2:textwidth=80
// See http://meta.wikimedia.org/wiki/User:Otheus/Auto_Login_via_REMOTE_USER
// Adapted by Rusty to be compatible with version 1.9 of mediawiki
//
// Add these two lines to the bottom of your LocalSettings.php
// require_once('extensions/Auth_remoteuser.php');
// $wgAuth = new Auth_remoteuser();
//
// The constructor of Auth_remoteuser registers a hook to do the automatic
// login. Storing the Auth_remoteuser object in $wgAuth tells mediawiki to use
// that object as the AuthPlugin. This way the login attempts by the hook will
// be handled by us.
//
// You probably want to edit the initUser function to set the users real name
// and email address properly for your configuration.
// Don't let anonymous people do things...
$wgGroupPermissions['*']['createaccount'] = false;
$wgGroupPermissions['*']['read'] = false;
$wgGroupPermissions['*']['edit'] = false;
// The Auth_remoteuser class is an AuthPlugin so make sure we have this
// included.
require_once('AuthPlugin.php');
/**
* This hook is registered by the Auth_remoteuser constructor. It will be
* called on every page load. It serves the function of automatically logging
* in the user. The Auth_remoteuser class is an AuthPlugin and handles the
* actual authentication, user creation, etc.
*
* Details:
* 1. Check to see if the user has a session and is not anonymous. If this is
* true we can just return.
* 2. If the user doesn't have a session, we create a login form with our own
* fake request and ask the form to authenticate the user. If the user does
* not exist authenticateUserData will attempt to create one. The login form
* uses our Auth_remoteuser class as an AuthPlugin.
*
* Note: If cookies are disabled, an infinite loop /might/ occur?
*/
function Auth_remote_user_hook() {
global $wgUser;
global $wgRequest;
global $_REQUEST;
// For a few special pages, don't do anything.
$title = $wgRequest->getVal('title');
if (($title == Title::makeName(NS_SPECIAL, 'Userlogout')) ||
($title == Title::makeName(NS_SPECIAL, 'Userlogin'))) {
return;
}
// Do nothing if session is valid
$user = User::newFromSession();
if (!$user->isAnon()) {
return; // User is already logged in and not anonymous.
}
// Copied from includes/SpecialUserlogin.php
if(!isset($wgCommandLineMode) && !isset($_COOKIE[session_name()])) {
wfSetupSession();
}
// Submit a fake login form to authenticate the user.
$username = $_SERVER['REMOTE_USER' ];
$params = new FauxRequest(array(
'wpName' => $username,
'wpPassword' => '',
'wpDomain' => '',
'wpRemember' => ''
));
// Authenticate user data will automatically create new users.
$loginForm = new LoginForm($params);
$result = $loginForm->authenticateUserData();
if ($result != LoginForm::SUCCESS) {
error_log('Unexpected REMOTE_USER authentication failure.');
return;
}
$wgUser->setCookies();
return; // User has been logged in.
}
class Auth_remoteuser extends AuthPlugin {
function Auth_remoteuser() {
// Register our hook function. This hook will be executed on every page
// load. Its purpose is to automatically log the user in, if necessary.
if ( strlen($_SERVER['REMOTE_USER']) ) {
global $wgExtensionFunctions;
if (!isset($wgExtensionFunctions)) {
$wgExtensionFunctions = array();
}
else if (!is_array($wgExtensionFunctions)) {
$wgExtensionFunctions = array( $wgExtensionFunctions );
}
array_push($wgExtensionFunctions, 'Auth_remote_user_hook');
}
return;
}
/**
* Disallow password change.
*
* @return bool
*/
# mr349, 25/09/2007
function allowPasswordChange() {
return false;
}
/**
* This should not be called because we do not allow password change. Always
* fail by returning false.
*
* @param $user User object.
* @param $password String: password.
* @return bool
* @public
*/
# mr349, 25/09/2007
function setPassword($user, $password) {
return false;
}
/**
* We don't support this but we have to return true for preferences to save.
*
* @param $user User object.
* @return bool
* @public
*/
function updateExternalDB($user) {
return true;
}
/**
* We can't create external accounts so return false.
*
* @return bool
* @public
*/
function canCreateAccounts() {
return false;
}
/**
* We don't support adding users to whatever service provides REMOTE_USER, so
* fail by always returning false.
*
* @param User $user
* @param string $password
* @return bool
* @public
*/
function addUser($user, $password) {
return false;
}
/**
* Pretend all users exist. This is checked by authenticateUserData to
* determine if a user exists in our 'db'. By returning true we tell it that
* it can create a local wiki user automatically.
*
* @param $username String: username.
* @return bool
* @public
*/
function userExists($username) {
return true;
}
/**
* Check whether the given name matches REMOTE_USER.
* The name will be normalized to MediaWiki's requirements, so
* lower it and the REMOTE_USER before checking.
*
* @param $username String: username.
* @param $password String: user password.
* @return bool
* @public
*/
function authenticate($username, $password) {
global $_SERVER;
return isset($_SERVER['REMOTE_USER']) &&
(strtolower($username) == strtolower($_SERVER['REMOTE_USER']));
}
/**
* Check to see if the specific domain is a valid domain.
*
* @param $domain String: authentication domain.
* @return bool
* @public
*/
function validDomain($domain) {
return true;
}
/**
* When a user logs in, optionally fill in preferences and such.
* For instance, you might pull the email address or real name from the
* external user database.
*
* The User object is passed by reference so it can be modified; don't
* forget the & on your function declaration.
*
* @param User $user
* @public
*/
function updateUser(&$user) {
// We only set this stuff when accounts are created.
return true;
}
/**
* Return true because the wiki should create a new local account
* automatically when asked to login a user who doesn't exist locally but
* does in the external auth database.
*
* @return bool
* @public
*/
function autoCreate() {
return true;
}
/**
* Return true to prevent logins that don't authenticate here from being
* checked against the local database's password fields.
*
* @return bool
* @public
*/
function strict() {
return true;
}
/**
* When creating a user account, optionally fill in preferences and such.
* For instance, you might pull the email address or real name from the
* external user database.
*
* @param $user User object.
* @public
*/
function initUser(&$user) {
global $_SERVER;
$username = $_SERVER['REMOTE_USER'];
// Using your own methods put the users real name here.
$user->setRealName('');
// Using your own methods put the users email here.
$user->setEmail($username . '@example.com');
$user->mEmailAuthenticated = wfTimestampNow();
$user->setToken();
//turn on e-mail notifications by default
$user->setOption('enotifwatchlistpages', 1);
$user->setOption('enotifusertalkpages', 1);
$user->setOption('enotifminoredits', 1);
$user->setOption('enotifrevealaddr', 1);
$user->saveSettings();
}
/**
* Modify options in the login template. This shouldn't be very important
* because no one should really be bothering with the login page.
*
* @param $template UserLoginTemplate object.
* @public
*/
function modifyUITemplate(&$template) {
//disable the mail new password box
$template->set('useemail', false);
//disable 'remember me' box
$template->set('remember', false);
$template->set('create', false);
$template->set('domain', false);
$template->set('usedomain', false);
}
/**
* Normalize user names to the mediawiki standard to prevent duplicate
* accounts.
*
* @param $username String: username.
* @return string
* @public
*/
function getCanonicalName($username) {
// lowercase the username
$username = strtolower($username);
// uppercase first letter to make mediawiki happy
$username[0] = strtoupper($username[0]);
return $username;
}
}
?>
Yes, I have commented by code changes with my CRSID, feel free to replace the comments.
The code changes:
Line 111 of ./extensions/Auth_remoteuser.php change the false from:
function allowPasswordChange() {
return false;
}
to:
function allowPasswordChange() {
return true;
}
Same for line 124:
function setPassword($user, $password) {
return false;
}
to:
function setPassword($user, $password) {
return true;
}
