Estinzioni:AbuseFilter

This extension comes with MediaWiki 1.38 and above. Thus you do not have to download it again. However, you still need to follow the other instructions provided.

Manuali di l'estenzioni MediaWiki

AbuseFilter Statu dâ rilassu: stàbbili
Implementation	User activity , Special page , API
Description	Pirmetti ristrizzioni spicìfichi ca sunnu basati ntô cumpurtamentu di nziriri nta l'attività di wiki
Author(s)	Andrew Garrett Daimona Eaytoy Marius Hoch River Tarnell Victor Vasiliev
Compatibility policy	Snapshots releases along with MediaWiki. Master is not backward compatible.
MediaWiki	>= 1.43.0
Database changes	Yes
Composer	mediawiki/abuse-filter
Tables	abuse_filter abuse_filter_action abuse_filter_history abuse_filter_log
License	GNU General Public License 2.0 or later
Download	Download extension Git [?]: Download Git master browse repository (Phabricator · GitHub) commit history repository contributors (GitHub) code review
Parameters $wgAbuseFilterConditionLimit $wgAbuseFilterRangeBlockSize $wgAbuseFilterAnonBlockDuration $wgAbuseFilterLogIPMaxAge $wgAbuseFilterCentralDB $wgAbuseFilterDefaultWarningMessage $wgAbuseFilterEmergencyDisableAge $wgAbuseFilterEnableBlockedExternalDomain $wgAbuseFilterActionRestrictions $wgAbuseFilterActions $wgAbuseFilterProtectedVariables $wgAbuseFilterLogIP $wgAbuseFilterPrivateDetailsForceReason $wgAbuseFilterEmergencyDisableCount $wgAbuseFilterLogPrivateDetailsAccess $wgAbuseFilterSlowFilterRuntimeLimit $wgAbuseFilterEmergencyDisableThreshold $wgAbuseFilterLocallyDisabledGlobalActions $wgAbuseFilterBlockDuration $wgAbuseFilterDefaultDisallowMessage $wgAbuseFilterValidGroups $wgAbuseFilterNotificationsPrivate $wgAbuseFilterBlockAutopromoteDuration $wgAbuseFilterIsCentral $wgAbuseFilterNotifications
Added rights abusefilter-modify abusefilter-log-detail abusefilter-view abusefilter-log abusefilter-privatedetails abusefilter-privatedetails-log abusefilter-modify-restricted abusefilter-revert abusefilter-view-private abusefilter-log-private abusefilter-hidden-log abusefilter-hide-log abusefilter-modify-global abusefilter-modify-blocked-external-domains abusefilter-bypass-blocked-external-domains abusefilter-access-protected-vars abusefilter-protected-vars-log
Hooks used ArticleDelete BeforeCreateEchoEvent ChangeTagsListActive CheckUserInsertChangesRow CheckUserInsertLogEventRow CheckUserInsertPrivateEventRow ContributionsToolLinks EditFilterMergedContent GetAutoPromoteGroups GetPreferences HistoryPageToolLinks JsonValidateSave ListDefinedTags LoadExtensionSchemaUpdates PageSaveComplete ParserOutputStashForEdit RecentChange_save SaveUserOptions TitleMove UndeletePageToolLinks UploadStashFile UploadVerifyUpload UserMergeAccountFields getUserPermissionsErrors
Hooks provided AbuseFilterAlterVariables AbuseFilter-builder AbuseFilter-deprecatedVariables AbuseFilter-computeVariable AbuseFilter-contentToString AbuseFilterCustomActions AbuseFilter-deprecatedVariables AbuseFilter-filterAction AbuseFilter-generateGenericVars AbuseFilter-generateTitleVars AbuseFilter-generateUserVars AbuseFilter-generateStaticVars AbuseFilterGenerateVarsForRecentChange AbuseFilterGetDangerousActions AbuseFilter-interceptVariable AbuseFilterShouldFilterAction
Quarterly downloads	138 (Ranked 42nd)
Public wikis using	2,939 (Ranked 186th)
Translate the AbuseFilter extension if it is available at translatewiki.net
Issues	Open tasks · Report a bug

AbuseFilter

2020 Coolest Tool
Award Winner

in the category
Quality

The AbuseFilter extension allows privileged users to set specific actions to be taken when actions by users, such as edits, match certain criteria.

For example, a filter could be created to prevent unregistered users from adding external links, or to disallow edits that remove more than 2000 characters.

Nstallazzioni

• Download and move the extracted AbuseFilter folder to your extensions/ directory.
  Developers and code contributors should install the extension from Git instead, using:cd extensions/
git clone https://gerrit.wikimedia.org/r/mediawiki/extensions/AbuseFilter
• Only when installing from Git, run Composer to install PHP dependencies, by issuing composer install --no-dev in the extension directory. (See task T173141 for potential complications.)
• Add the following code at the bottom of your LocalSettings.php file:

  wfLoadExtension( 'AbuseFilter' );
  

• Run the update script which will automatically create the necessary database tables that this extension needs.
• Configure as required.
•  Done – Navigate to Special:Version on your wiki to verify that the extension is successfully installed.

When installing from Git, please note that this extension requires Composer .

So, after installation from Git change to the directory containing the extension e.g. "../extensions/AbuseFilter/" and run composer install --no-dev, or when updating: composer update --no-dev.

Alternatively as well as preferably add the line "extensions/AbuseFilter/composer.json" to the "composer.local.json" file in the root directory of your wiki like e.g.

{
	"extra": {
		"merge-plugin": {
			"include": [
				"extensions/AbuseFilter/composer.json"
			]
		}
	}
}

Cunfigurazzioni

Dritti utenti

Once you installed the extension, you'll have to set up the user rights in "LocalSettings.php".

User rights for AbuseFilter

Right	Discrizzioni	Notes	User groups that have this right by default
abusefilter-modify	Criari o canciari li filtri anti-abbusi	Requires the abusefilter-view right	sysop
abusefilter-view	Taliari li filtri anti-abbusi		*
abusefilter-log	Taliari lu riggistru di l'abbusi		*
abusefilter-log-detail	Taliari ntô dittagghiu li vuci dû riggistru di l'abbusi	Requires the abusefilter-log right	sysop
abusefilter-privatedetails	Taliari li dati risirvati prisenti ntô riggistru di l'abbusi	Prior to 1.34 this right was named abusefilter-private - Requires the abusefilter-log-detail right	—
abusefilter-modify-restricted	Canciari li filtri anti-abbusi ca fannu azzioni risirvati	Requires the abusefilter-modify right	sysop
abusefilter-modify-global	Crea o cancia li filtri anti-abbusi glubbali	Requires the abusefilter-modify right	—
abusefilter-revert	Annullari tutti li canciamenti fatti dûn filtru anti-abbusi		sysop
abusefilter-view-private	Taliari li filtri anti-abbusi marcati comu privati	Requires the abusefilter-view right (not needed if the group already has the abusefilter-modify right)	sysop
abusefilter-log-private	Taliari li vuci di riggistru fatti dî filtri anti-abbusi marcati comu privati	Requires the abusefilter-log right (not needed if the group already has the abusefilter-modify or abusefilter-view-private rights)	sysop
abusefilter-hide-log	Ammuccia vuci ntô riggistru di l'abbusi	Requires the abusefilter-log right	suppress
abusefilter-hidden-log	Talìa li vuci ammucciati dû riggistru di l'abbusi	Requires the abusefilter-log right	suppress
abusefilter-privatedetails-log	Talìa li dittagghî privati dû riggistru d'acessu dû filtru anti-abbusi	Prior to 1.34 this right was named abusefilter-private-log	—
abusefilter-modify-blocked-external-domains	Crea o modifica quali domini esterni non possono essere aggiunti come collegamento		sysop
abusefilter-bypass-blocked-external-domains	Ignora i blocchi ai domini esterni	Requires the edit right	bot
abusefilter-access-protected-vars	View and create filters that use protected variables		sysop
abusefilter-protected-vars-log	View logs related to accessing protected variable values		sysop

For example, the following sample configuration would allow sysops to do everything they want with AbuseFilter, and everyone to view the log and see public filter settings:

$wgGroupPermissions['sysop']['abusefilter-modify'] = true;
$wgGroupPermissions['*']['abusefilter-log-detail'] = true;
$wgGroupPermissions['*']['abusefilter-view'] = true;
$wgGroupPermissions['*']['abusefilter-log'] = true;
$wgGroupPermissions['sysop']['abusefilter-privatedetails'] = true;
$wgGroupPermissions['sysop']['abusefilter-modify-restricted'] = true;
$wgGroupPermissions['sysop']['abusefilter-revert'] = true;
$wgGroupPermissions['sysop']['abusefilter-access-protected-vars'] = true;
$wgGroupPermissions['sysop']['abusefilter-protected-vars-log'] = true;

Filters marked as private can only be viewed by users with either the abusefilter-modify or abusefilter-view-private permission.

Protected filters can only be created and viewed by users with the abusefilter-access-protected-vars permission. Logs pertaining to these filters can only be viewed by users with the abusefilter-protected-vars-log permission. For more information, see Rules format .

Parameters

Nomu variàbbili	Default value	Discrizzioni
$wgAbuseFilterActions	[ 'throttle' => true, 'warn' => true, 'disallow' => true, 'blockautopromote' => true, 'block' => true, 'rangeblock' => false, 'degroup' => false, 'tag' => true ]	The possible actions that can be taken by abuse filters. When adding a new action, check if it is restricted in $wgAbuseFilterActionRestrictions and, if it is, don't forget to add the abusefilter-modify-restricted right to the appropriate user groups.
$wgAbuseFilterConditionLimit	1000	The maximum number of 'conditions' that can be used each time the filters are run against a change. (More complex filters require more 'conditions').
$wgAbuseFilterValidGroups	[ 'default' ]	The list of "groups" filters can be divided into. By default there is only one group. Other extensions may add other groups.
$wgAbuseFilterEmergencyDisableThreshold	[ 'default' => 0.05 ]	Disable a filter if it matched more than 2 edits, constituting more than 5 % of the actions which were checked against the filter's group in the "observed" period (at most one day), and the filter has been changed in the last 86400 seconds (one day). See emergency throttling.
$wgAbuseFilterEmergencyDisableCount	[ 'default' => 2 ]
$wgAbuseFilterEmergencyDisableAge	[ 'default' => 86400 ]
$wgAbuseFilterActionRestrictions	[ "throttle" => false, "warn" => false, "disallow" => false, "blockautopromote" => true, "block" => true, "rangeblock" => true, "degroup" => true, "tag" => false ]	Users must have the "abusefilter-modify-restricted" user right as well as "abusefilter-modify" in order to create or modify filters which carry out these actions.
$wgAbuseFilterNotifications	false	Allows to configure the extension to send hit notifications to Special:RecentChanges or UDP. Opzioni dispunìbbili: rc, udp, rcandudp For sending changes to abuse filters to Special:RecentChanges, use unset($wgLogRestrictions['abusefilter']);.
$wgAbuseFilterNotificationsPrivate	false	Enable notifications for private filters.
$wgAbuseFilterCentralDB	null	MW 1.41+ Name of a database where global abuse filters will be stored in. Requires CentralAuth installed otherwise global filters will break on a wikifarm.
$wgAbuseFilterIsCentral	false	MW 1.41+ Set this variable to true for the wiki where global AbuseFilters are stored in. Requires CentralAuth installed otherwise global filters will break on a wikifarm.
$wgAbuseFilterLocallyDisabledGlobalActions	[ "throttle" => false, "warn" => false, "disallow" => false, "blockautopromote" => false, "block" => false, "rangeblock" => false, "degroup" => false, "tag" => false ]	Disallow Centralised filters from taking actions set as true in this variable.
$wgAbuseFilterBlockDuration	'indefinite'	Duration of blocks made by AbuseFilter. as of 1.31.0-wmf.25 block durations may be specified for every single filter and will override this variable. This variable is only used when enabling the block in order to preselect a default duration.
$wgAbuseFilterAnonBlockDuration	null	Duration of blocks made by AbuseFilter on users who are not logged in. The value of $wgAbuseFilterBlockDuration will be used if this is not set. as of 1.31.0-wmf.25 block durations may be specified for every single filter and will override this variable. This variable is only used when enabling the block in order to preselect a default duration.
$wgAbuseFilterBlockAutopromoteDuration	5	Duration, in days, for which users' autopromotion is blocked by filters.
$wgAbuseFilterDefaultWarningMessage	[ 'default' => 'abusefilter-warning' ]	Default warning messages, per filter group
$wgAbuseFilterDefaultDisallowMessage	[ 'default' => 'abusefilter-disallowed' ]	Default disallow messages, per filter group
$wgAbuseFilterLogIP	true	Whether to include IP in the abuse_filter_log
$wgAbuseFilterLogIPMaxAge	3 * 30 * 24 * 3600	Age used as cutoff when purging old IP log data. Defaults to 3 months. Used by maintenance script purgeOldLogIPData.php.
$wgAbuseFilterProfileActionsCap	10000	Number of action that determines when to reset profiling stats.
$wgAbuseFilterLogPrivateDetailsAccess	false	Whether accessing private information from a filter log entry is logged.
$wgAbuseFilterPrivateDetailsForceReason	false	Whether users are forced to provide a reason for accessing private information from a filter log entry.
$wgAbuseFilterSlowFilterRuntimeLimit	500	Runtime in milliseconds before a filter is considered slow.
$wgAbuseFilterRangeBlockSize	[ 'IPv4' => '16', 'IPv6' => '19', ]	Size of the range blocked by 'rangeblock' action.
$wgAbuseFilterProtectedVariables	[ "user_unnamed_ip" ]	Array of variables that are be considered protected (limited access) and require the abusefilter-access-protected-vars right to use/view.

Emergency throttling

AbuseFilter comes with a feature that automatically throttles (disables) filters that have been edited recently and match a certain threshold of the latest actions.

This is done to prevent harmful edits on the filters to block every user that performs an action on the wiki or similar.

The condition to disable the filter depend on those variables:

• $wgAbuseFilterEmergencyDisableThreshold - Percent of matches over the total amount of actions in the observed period.
• $wgAbuseFilterEmergencyDisableCount - Count of matches of the filter in the observed period.
• $wgAbuseFilterEmergencyDisableAge - Age of the filter to take it into account. If the last edit of the filter is older than this number of seconds, the filter won't be throttled, unless it's already throttled.

Throttled filters can be identified in the list of filters (Special:AbuseFilter) with the state Attivatu, Alto tasso di corrispondenze. Throttling happens silently, and there's no way to see when a filter got throttled, except when Extension:Echo is installed, then a notification is sent to the user who was last to modify the filter.

When a filter gets throttled, it doesn't perform any dangerous action (actions usually restricted to special rights like blocking the user, or removing it from groups, controlled by $wgAbuseFilterActionRestrictions), and only "safe" actions are allowed (the ones that can warn or prevent the ongoing action). Throttled filters don't get enabled automatically. To disable the throttling, you need to edit the filter. Note that you need to actually change something from the filter: changing something from the filter's notes is sufficient.

Note that editing the filter updates its age, and can cause it to be disabled if it reaches again the conditions to be throttled in a short period since the last edit, leading to a unusable filter if your wiki has more abuse edits than legitimate ones.

Creating and managing filters

Once the extension has been installed, filters can be created/tested/changed/deleted and the logs can be accessed from the Abuse filter management page Special:AbuseFilter.

• Rules format - The basics of how to write a filter

• Actions

• Global Rules

• Guide to optimizing condition limit usage

• To import filters from Wikipedia: When you have installed the extension, go to w:Special:AbuseFilter, choose a filter (say w:Special:AbuseFilter/3), then click "Export this filter to another wiki", copy the text, go to "Special:AbuseFilter/import" on your wiki, paste the text.

• m:Small wiki toolkits/Starter kit/AbuseFilter - A guide for small wiki communities on metawiki

API

AbuseFilter adds two API list modules, one for details of abuse filters ("abusefilters") and one for the abuse log, since it is separate from other MediaWiki logs ("abuselog"). It is not possible to create or modify abuse filters using the API.

list = abusefilters

List information about filters

Parameters

• abfstartid - The filter id to start enumerating from
• abfendid - The filter id to stop enumerating at
• abfdir - The direction in which to enumerate (older, newer)
• abfshow - Show only filters which meet these criteria (enabled|!enabled|deleted|!deleted|private|!private|protected|!protected)
• abflimit - The maximum number of filters to list
• abfprop - Which properties to get (id|description|pattern|actions|hits|comments|lasteditor|lastedittime|status|private)

When filters are private, some of the properties specified with abfprop will be missing unless you have the appropriate user rights.

;Esempi

List non-private abuse filters

api.php?action=query&list=abusefilters&abfshow=!private&abfprop=id|hits [try in ApiSandbox]

Result
{ "batchcomplete": "", "continue": { "abfstartid": 18, "continue": "-||" }, "query": { "abusefilters": [ { "id": 1, "hits": 41430 }, { "id": 3, "hits": 957485 }, { "id": 5, "hits": 5931 }, { "id": 6, "hits": 19 }, { "id": 8, "hits": 7 }, { "id": 9, "hits": 41354 }, { "id": 11, "hits": 132971 }, { "id": 12, "hits": 139693 }, { "id": 14, "hits": 63 }, { "id": 15, "hits": 15 } ] } }

list = abuselog

List instances where actions triggered an abuse filter.

Parameters

• aflstart - The timestamp to start enumerating from
• aflend - The timestamp to stop enumerating at
• afldir - The direction in which to enumerate (older, newer)
• afluser - Show only entries where the action was attempted by a given user or IP address.
• afltitle - Show only entries where the action involved a given page.
• aflfilter - Show only entries that triggered a given filter ID
• afllimit - The maximum number of entries to list
• aflprop - Which properties to get: (ids|filter|user|ip|title|action|details|result|timestamp|hidden|revid|wiki)

Example

List instances where the abuse filter was triggered in response to actions from the user "SineBot"

api.php?action=query&list=abuselog&afluser=SineBot&aflprop=ids [try in ApiSandbox]

Result

{ "batchcomplete": "", "continue": { "aflstart": "2018-03-06T02:34:18Z", "continue": "-||" }, "query": { "abuselog": [ { "id": 27219261, "filter_id": "1073" }, { "id": 26938051, "filter_id": "" }, { "id": 23388942, "filter_id": "1" }, { "id": 22044912, "filter_id": "" }, { "id": 22032235, "filter_id": "" }, { "id": 22032196, "filter_id": "" }, { "id": 21983882, "filter_id": "" }, { "id": 20594818, "filter_id": "904" }, { "id": 20593489, "filter_id": "904" }, { "id": 20590442, "filter_id": "904" } ] } }

Possible errors

• Some users might experience that creating new filters or modifying old filters fail and the user just gets redirected to the original page. If the Wiki is using SSL certificates, this error could possibly be because of the $wgServer value, which might be using "http://" instead of "https://". An indication of this error will be, the browser giving https warning for Special:AbuseFilter pages. (Topic:T23dyyih0ofjada5)

Integration with other extensions

You can integrate AbuseFilter with other extension in various ways.

Adding variables for filtering

It is possible to add new variables, to be used in abuse filters. A list of examples is available . To do that, you should:

• Add a handler for the AbuseFilter-builder hook. To add a variable, you should use $builder['vars']['variable_name'] = 'i18n-key';, where variable_name is the name of the variable, and i18n-key is the fragment of an i18n key. The full key will be abusefilter-edit-builder-vars-{$your_key}.
• Add the i18n messages you chose at the previous point.
• Choose a hook handler where the variable will be computed. Depending on your use case, you could:
  • Implement the AbuseFilter-generateTitleVars hook; this is specifically thought for page-related variables;
  • Implement the AbuseFilter-generateUserVars hook; this is specifically thought for user-related variables;
  • Implement the AbuseFilter-generateGenericVars hook; this is for variables not bound to a specific page or user;
  • Implement the AbuseFilterAlterVariables hook; this is a bit more flexible than the other hooks, but it has a downside: your variable will not be available when examining past RecentChanges entries. If you want to implement that feature (and it's recommended to do so), you should use one of the hooks listed above, and use its third parameter ($RCRow).
• Inside the hook handler, there are two ways to add a variable:
  • The "direct" way is calling $vars->setVar( 'var_name', var_value );. This is ideal only when the value is easy and quick to compute: the value is computed even if no active filter will use it.
  • The "lazy" way is calling $vars->setLazyLoadVar( 'var_name', 'method_name', $params );. Here, 'method_name' is a (unique) identifier that will be used to compute the variable (it's recommended to prefix it with the name of your extension). To register the method, you should add a handler for the AbuseFilter-computeVariable hook; therein, you should check if the $method passed matches your 'method_name', and if so, compute the variable. Lastly, $params is an array of parameters that you'll need to compute the variable; these are passed to the computeVariable hook handler. For an example of this, you can check out CentralAuth's global_user_groups.

Adding custom actions

You can add custom action handlers, so that each filter may perform further actions. To do that, you choose a name for the action ('my-action' from now on), and then:

• Create a class named e.g. MyAction, that should extend \MediaWiki\Extension\AbuseFilter\Consequence, which can also implement HookAborterConsequence or ConsequencesDisablerConsequence
• Add a subscriber to the AbuseFilterCustomActions hook; the subscriber should provide a callback as documented in the hook documentation, that returns an instance of the class created above, for instance:

class MyAction extends \MediaWiki\Extension\AbuseFilter\Consequence {
    public function run() {
        throw new \Exception( 'Write me' );
    }
}

public function onAbuseFilterCustomActions( &$actions ) {
    $actions[] = function ( \MediaWiki\Extension\AbuseFilter\Consequence\Parameters $params, array $rawParams ) : MyConsequence {
        return new MyAction( $params, $rawParams );
    };
}

Then you should add the following i18n messages; you can replace 'my_action' with e.g. 'block' to see what the messages are for:

• 'abusefilter-edit-action-${my_action}'
• 'abusefilter-action-${my_action}'

Adding rule groups

You can also add extra rule groups, which can be used to group existing abuse filters. Note that, at the moment, each filter can only be in a single group (T116642). Currently, the only known consumer of this feature is Extension:StructuredDiscussions . To do that, you should:

• Append the name of the group to $wgAbuseFilterValidGroups.

• Add some code to run the filters with your group. Note that AbuseFilter won't do that on its own. To do that, you should construct an AbuseFilterRunner object, passing in the name of your group.

Talìa macari

• Help:BlockedExternalDomains

• Several WMF wikis where it's enabled (and with which configuration)