5 * Created on Sep 4, 2006
7 * Copyright © 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
22 * http://www.gnu.org/copyleft/gpl.html
29 * This is the main API class, used for both external and internal processing.
30 * When executed, it will create the requested formatter object,
31 * instantiate and execute an object associated with the needed action,
32 * and use formatter to print results.
33 * In case of an exception, an error message will be printed using the same formatter.
35 * To use API from another application, run it using FauxRequest object, in which
36 * case any internal exceptions will not be handled but passed up to the caller.
37 * After successful execution, use getResult() for the resulting data.
41 class ApiMain
extends ApiBase
{
44 * When no format parameter is given, this format will be used
46 const API_DEFAULT_FORMAT
= 'xmlfm';
49 * List of available modules: action name => module class
51 private static $Modules = array(
52 'login' => 'ApiLogin',
53 'logout' => 'ApiLogout',
54 'query' => 'ApiQuery',
55 'expandtemplates' => 'ApiExpandTemplates',
56 'parse' => 'ApiParse',
57 'opensearch' => 'ApiOpenSearch',
58 'feedcontributions' => 'ApiFeedContributions',
59 'feedwatchlist' => 'ApiFeedWatchlist',
61 'paraminfo' => 'ApiParamInfo',
63 'compare' => 'ApiComparePages',
66 'purge' => 'ApiPurge',
67 'rollback' => 'ApiRollback',
68 'delete' => 'ApiDelete',
69 'undelete' => 'ApiUndelete',
70 'protect' => 'ApiProtect',
71 'block' => 'ApiBlock',
72 'unblock' => 'ApiUnblock',
74 'edit' => 'ApiEditPage',
75 'upload' => 'ApiUpload',
76 'filerevert' => 'ApiFileRevert',
77 'emailuser' => 'ApiEmailUser',
78 'watch' => 'ApiWatch',
79 'patrol' => 'ApiPatrol',
80 'import' => 'ApiImport',
81 'userrights' => 'ApiUserrights',
85 * List of available formats: format name => format class
87 private static $Formats = array(
88 'json' => 'ApiFormatJson',
89 'jsonfm' => 'ApiFormatJson',
90 'php' => 'ApiFormatPhp',
91 'phpfm' => 'ApiFormatPhp',
92 'wddx' => 'ApiFormatWddx',
93 'wddxfm' => 'ApiFormatWddx',
94 'xml' => 'ApiFormatXml',
95 'xmlfm' => 'ApiFormatXml',
96 'yaml' => 'ApiFormatYaml',
97 'yamlfm' => 'ApiFormatYaml',
98 'rawfm' => 'ApiFormatJson',
99 'txt' => 'ApiFormatTxt',
100 'txtfm' => 'ApiFormatTxt',
101 'dbg' => 'ApiFormatDbg',
102 'dbgfm' => 'ApiFormatDbg',
103 'dump' => 'ApiFormatDump',
104 'dumpfm' => 'ApiFormatDump',
108 * List of user roles that are specifically relevant to the API.
109 * array( 'right' => array ( 'msg' => 'Some message with a $1',
110 * 'params' => array ( $someVarToSubst ) ),
113 private static $mRights = array(
115 'msg' => 'Use of the write API',
118 'apihighlimits' => array(
119 'msg' => 'Use higher limits in API queries (Slow queries: $1 results; Fast queries: $2 results). The limits for slow queries also apply to multivalue parameters.',
120 'params' => array( ApiBase
::LIMIT_SML2
, ApiBase
::LIMIT_BIG2
)
129 private $mModules, $mModuleNames, $mFormats, $mFormatNames;
130 private $mResult, $mAction, $mShowVersions, $mEnableWrite;
131 private $mInternalMode, $mSquidMaxage, $mModule;
133 private $mCacheMode = 'private';
134 private $mCacheControl = array();
137 * Constructs an instance of ApiMain that utilizes the module and format specified by $request.
139 * @param $context IContextSource|WebRequest - if this is an instance of FauxRequest, errors are thrown and no printing occurs
140 * @param $enableWrite bool should be set to true if the api may modify data
142 public function __construct( $context = null, $enableWrite = false ) {
143 if ( $context === null ) {
144 $context = RequestContext
::getMain();
145 } elseif ( $context instanceof WebRequest
) {
148 $context = RequestContext
::getMain();
150 // We set a derivative context so we can change stuff later
151 $this->setContext( new DerivativeContext( $context ) );
153 if ( isset( $request ) ) {
154 $this->getContext()->setRequest( $request );
157 $this->mInternalMode
= ( $this->getRequest() instanceof FauxRequest
);
159 // Special handling for the main module: $parent === $this
160 parent
::__construct( $this, $this->mInternalMode ?
'main_int' : 'main' );
162 if ( !$this->mInternalMode
) {
163 // Impose module restrictions.
164 // If the current user cannot read,
165 // Remove all modules other than login
168 if ( $this->getRequest()->getVal( 'callback' ) !== null ) {
169 // JSON callback allows cross-site reads.
170 // For safety, strip user credentials.
171 wfDebug( "API: stripping user credentials for JSON callback\n" );
172 $wgUser = new User();
173 $this->getContext()->setUser( $wgUser );
177 global $wgAPIModules; // extension modules
178 $this->mModules
= $wgAPIModules + self
::$Modules;
180 $this->mModuleNames
= array_keys( $this->mModules
);
181 $this->mFormats
= self
::$Formats;
182 $this->mFormatNames
= array_keys( $this->mFormats
);
184 $this->mResult
= new ApiResult( $this );
185 $this->mShowVersions
= false;
186 $this->mEnableWrite
= $enableWrite;
188 $this->mSquidMaxage
= - 1; // flag for executeActionWithErrorHandling()
189 $this->mCommit
= false;
193 * Return true if the API was started by other PHP code using FauxRequest
196 public function isInternalMode() {
197 return $this->mInternalMode
;
201 * Get the ApiResult object associated with current request
205 public function getResult() {
206 return $this->mResult
;
210 * Get the API module object. Only works after executeAction()
214 public function getModule() {
215 return $this->mModule
;
219 * Get the result formatter object. Only works after setupExecuteAction()
221 * @return ApiFormatBase
223 public function getPrinter() {
224 return $this->mPrinter
;
228 * Set how long the response should be cached.
232 public function setCacheMaxAge( $maxage ) {
233 $this->setCacheControl( array(
234 'max-age' => $maxage,
235 's-maxage' => $maxage
240 * Set the type of caching headers which will be sent.
242 * @param $mode String One of:
243 * - 'public': Cache this object in public caches, if the maxage or smaxage
244 * parameter is set, or if setCacheMaxAge() was called. If a maximum age is
245 * not provided by any of these means, the object will be private.
246 * - 'private': Cache this object only in private client-side caches.
247 * - 'anon-public-user-private': Make this object cacheable for logged-out
248 * users, but private for logged-in users. IMPORTANT: If this is set, it must be
249 * set consistently for a given URL, it cannot be set differently depending on
250 * things like the contents of the database, or whether the user is logged in.
252 * If the wiki does not allow anonymous users to read it, the mode set here
253 * will be ignored, and private caching headers will always be sent. In other words,
254 * the "public" mode is equivalent to saying that the data sent is as public as a page
257 * For user-dependent data, the private mode should generally be used. The
258 * anon-public-user-private mode should only be used where there is a particularly
259 * good performance reason for caching the anonymous response, but where the
260 * response to logged-in users may differ, or may contain private data.
262 * If this function is never called, then the default will be the private mode.
264 public function setCacheMode( $mode ) {
265 if ( !in_array( $mode, array( 'private', 'public', 'anon-public-user-private' ) ) ) {
266 wfDebug( __METHOD__
. ": unrecognised cache mode \"$mode\"\n" );
267 // Ignore for forwards-compatibility
271 if ( !in_array( 'read', User
::getGroupPermissions( array( '*' ) ), true ) ) {
272 // Private wiki, only private headers
273 if ( $mode !== 'private' ) {
274 wfDebug( __METHOD__
. ": ignoring request for $mode cache mode, private wiki\n" );
279 wfDebug( __METHOD__
. ": setting cache mode $mode\n" );
280 $this->mCacheMode
= $mode;
284 * @deprecated since 1.17 Private caching is now the default, so there is usually no
285 * need to call this function. If there is a need, you can use
286 * $this->setCacheMode('private')
288 public function setCachePrivate() {
289 $this->setCacheMode( 'private' );
293 * Set directives (key/value pairs) for the Cache-Control header.
294 * Boolean values will be formatted as such, by including or omitting
295 * without an equals sign.
297 * Cache control values set here will only be used if the cache mode is not
298 * private, see setCacheMode().
300 * @param $directives array
302 public function setCacheControl( $directives ) {
303 $this->mCacheControl
= $directives +
$this->mCacheControl
;
307 * Make sure Vary: Cookie and friends are set. Use this when the output of a request
308 * may be cached for anons but may not be cached for logged-in users.
310 * WARNING: This function must be called CONSISTENTLY for a given URL. This means that a
311 * given URL must either always or never call this function; if it sometimes does and
312 * sometimes doesn't, stuff will break.
314 * @deprecated since 1.17 Use setCacheMode( 'anon-public-user-private' )
316 public function setVaryCookie() {
317 $this->setCacheMode( 'anon-public-user-private' );
321 * Create an instance of an output formatter by its name
323 * @param $format string
325 * @return ApiFormatBase
327 public function createPrinterByName( $format ) {
328 if ( !isset( $this->mFormats
[$format] ) ) {
329 $this->dieUsage( "Unrecognized format: {$format}", 'unknown_format' );
331 return new $this->mFormats
[$format] ( $this, $format );
335 * Execute api request. Any errors will be handled if the API was called by the remote client.
337 public function execute() {
339 if ( $this->mInternalMode
) {
340 $this->executeAction();
342 $this->executeActionWithErrorHandling();
349 * Execute an action, and in case of an error, erase whatever partial results
350 * have been accumulated, and replace it with an error message and a help screen.
352 protected function executeActionWithErrorHandling() {
353 // In case an error occurs during data output,
354 // clear the output buffer and print just the error information
358 $this->executeAction();
359 } catch ( Exception
$e ) {
361 if ( $e instanceof MWException
) {
362 wfDebugLog( 'exception', $e->getLogMessage() );
365 // Handle any kind of exception by outputing properly formatted error message.
366 // If this fails, an unhandled exception should be thrown so that global error
367 // handler will process and log it.
369 $errCode = $this->substituteResultWithError( $e );
371 // Error results should not be cached
372 $this->setCacheMode( 'private' );
374 $response = $this->getRequest()->response();
375 $headerStr = 'MediaWiki-API-Error: ' . $errCode;
376 if ( $e->getCode() === 0 ) {
377 $response->header( $headerStr );
379 $response->header( $headerStr, true, $e->getCode() );
382 // Reset and print just the error message
385 // If the error occured during printing, do a printer->profileOut()
386 $this->mPrinter
->safeProfileOut();
387 $this->printResult( true );
390 // Send cache headers after any code which might generate an error, to
391 // avoid sending public cache headers for errors.
392 $this->sendCacheHeaders();
394 if ( $this->mPrinter
->getIsHtml() && !$this->mPrinter
->isDisabled() ) {
401 protected function sendCacheHeaders() {
402 global $wgUseXVO, $wgVaryOnXFP;
403 $response = $this->getRequest()->response();
405 if ( $this->mCacheMode
== 'private' ) {
406 $response->header( 'Cache-Control: private' );
410 if ( $this->mCacheMode
== 'anon-public-user-private' ) {
411 $xfp = $wgVaryOnXFP ?
', X-Forwarded-Proto' : '';
412 $response->header( 'Vary: Accept-Encoding, Cookie' . $xfp );
414 $out = $this->getOutput();
415 if ( $wgVaryOnXFP ) {
416 $out->addVaryHeader( 'X-Forwarded-Proto' );
418 $response->header( $out->getXVO() );
419 if ( $out->haveCacheVaryCookies() ) {
420 // Logged in, mark this request private
421 $response->header( 'Cache-Control: private' );
424 // Logged out, send normal public headers below
425 } elseif ( session_id() != '' ) {
426 // Logged in or otherwise has session (e.g. anonymous users who have edited)
427 // Mark request private
428 $response->header( 'Cache-Control: private' );
430 } // else no XVO and anonymous, send public headers below
433 // Send public headers
434 if ( $wgVaryOnXFP ) {
435 $response->header( 'Vary: Accept-Encoding, X-Forwarded-Proto' );
437 // Bleeeeegh. Our header setting system sucks
438 $response->header( 'X-Vary-Options: Accept-Encoding;list-contains=gzip, X-Forwarded-Proto' );
442 // If nobody called setCacheMaxAge(), use the (s)maxage parameters
443 if ( !isset( $this->mCacheControl
['s-maxage'] ) ) {
444 $this->mCacheControl
['s-maxage'] = $this->getParameter( 'smaxage' );
446 if ( !isset( $this->mCacheControl
['max-age'] ) ) {
447 $this->mCacheControl
['max-age'] = $this->getParameter( 'maxage' );
450 if ( !$this->mCacheControl
['s-maxage'] && !$this->mCacheControl
['max-age'] ) {
451 // Public cache not requested
452 // Sending a Vary header in this case is harmless, and protects us
453 // against conditional calls of setCacheMaxAge().
454 $response->header( 'Cache-Control: private' );
458 $this->mCacheControl
['public'] = true;
460 // Send an Expires header
461 $maxAge = min( $this->mCacheControl
['s-maxage'], $this->mCacheControl
['max-age'] );
462 $expiryUnixTime = ( $maxAge == 0 ?
1 : time() +
$maxAge );
463 $response->header( 'Expires: ' . wfTimestamp( TS_RFC2822
, $expiryUnixTime ) );
465 // Construct the Cache-Control header
468 foreach ( $this->mCacheControl
as $name => $value ) {
469 if ( is_bool( $value ) ) {
471 $ccHeader .= $separator . $name;
475 $ccHeader .= $separator . "$name=$value";
480 $response->header( "Cache-Control: $ccHeader" );
484 * Replace the result data with the information about an exception.
485 * Returns the error code
486 * @param $e Exception
489 protected function substituteResultWithError( $e ) {
490 global $wgShowHostnames;
492 $result = $this->getResult();
493 // Printer may not be initialized if the extractRequestParams() fails for the main module
494 if ( !isset ( $this->mPrinter
) ) {
495 // The printer has not been created yet. Try to manually get formatter value.
496 $value = $this->getRequest()->getVal( 'format', self
::API_DEFAULT_FORMAT
);
497 if ( !in_array( $value, $this->mFormatNames
) ) {
498 $value = self
::API_DEFAULT_FORMAT
;
501 $this->mPrinter
= $this->createPrinterByName( $value );
502 if ( $this->mPrinter
->getNeedsRawData() ) {
503 $result->setRawMode();
507 if ( $e instanceof UsageException
) {
508 // User entered incorrect parameters - print usage screen
509 $errMessage = $e->getMessageArray();
511 // Only print the help message when this is for the developer, not runtime
512 if ( $this->mPrinter
->getWantsHelp() ||
$this->mAction
== 'help' ) {
513 ApiResult
::setContent( $errMessage, $this->makeHelpMsg() );
517 global $wgShowSQLErrors, $wgShowExceptionDetails;
518 // Something is seriously wrong
519 if ( ( $e instanceof DBQueryError
) && !$wgShowSQLErrors ) {
520 $info = 'Database query error';
522 $info = "Exception Caught: {$e->getMessage()}";
526 'code' => 'internal_api_error_' . get_class( $e ),
529 ApiResult
::setContent( $errMessage, $wgShowExceptionDetails ?
"\n\n{$e->getTraceAsString()}\n\n" : '' );
533 $result->disableSizeCheck();
535 $requestid = $this->getParameter( 'requestid' );
536 if ( !is_null( $requestid ) ) {
537 $result->addValue( null, 'requestid', $requestid );
540 if ( $wgShowHostnames ) {
541 // servedby is especially useful when debugging errors
542 $result->addValue( null, 'servedby', wfHostName() );
545 $result->addValue( null, 'error', $errMessage );
547 return $errMessage['code'];
551 * Set up for the execution.
554 protected function setupExecuteAction() {
555 global $wgShowHostnames;
557 // First add the id to the top element
558 $result = $this->getResult();
559 $requestid = $this->getParameter( 'requestid' );
560 if ( !is_null( $requestid ) ) {
561 $result->addValue( null, 'requestid', $requestid );
564 if ( $wgShowHostnames ) {
565 $servedby = $this->getParameter( 'servedby' );
567 $result->addValue( null, 'servedby', wfHostName() );
571 $params = $this->extractRequestParams();
573 $this->mShowVersions
= $params['version'];
574 $this->mAction
= $params['action'];
576 if ( !is_string( $this->mAction
) ) {
577 $this->dieUsage( 'The API requires a valid action parameter', 'unknown_action' );
584 * Set up the module for response
585 * @return ApiBase The module that will handle this action
587 protected function setupModule() {
588 // Instantiate the module requested by the user
589 $module = new $this->mModules
[$this->mAction
] ( $this, $this->mAction
);
590 $this->mModule
= $module;
592 $moduleParams = $module->extractRequestParams();
594 // Die if token required, but not provided (unless there is a gettoken parameter)
595 $salt = $module->getTokenSalt();
596 if ( $salt !== false && !isset( $moduleParams['gettoken'] ) ) {
597 if ( !isset( $moduleParams['token'] ) ) {
598 $this->dieUsageMsg( array( 'missingparam', 'token' ) );
600 if ( !$this->getUser()->matchEditToken( $moduleParams['token'], $salt, $this->getRequest() ) ) {
601 $this->dieUsageMsg( 'sessionfailure' );
609 * Check the max lag if necessary
610 * @param $module ApiBase object: Api module being used
611 * @param $params Array an array containing the request parameters.
612 * @return boolean True on success, false should exit immediately
614 protected function checkMaxLag( $module, $params ) {
615 if ( $module->shouldCheckMaxlag() && isset( $params['maxlag'] ) ) {
617 global $wgShowHostnames;
618 $maxLag = $params['maxlag'];
619 list( $host, $lag ) = wfGetLB()->getMaxLag();
620 if ( $lag > $maxLag ) {
621 $response = $this->getRequest()->response();
623 $response->header( 'Retry-After: ' . max( intval( $maxLag ), 5 ) );
624 $response->header( 'X-Database-Lag: ' . intval( $lag ) );
626 if ( $wgShowHostnames ) {
627 $this->dieUsage( "Waiting for $host: $lag seconds lagged", 'maxlag' );
629 $this->dieUsage( "Waiting for a database server: $lag seconds lagged", 'maxlag' );
638 * Check for sufficient permissions to execute
639 * @param $module ApiBase An Api module
641 protected function checkExecutePermissions( $module ) {
642 $user = $this->getUser();
643 if ( $module->isReadMode() && !in_array( 'read', User
::getGroupPermissions( array( '*' ) ), true ) &&
644 !$user->isAllowed( 'read' ) )
646 $this->dieUsageMsg( 'readrequired' );
648 if ( $module->isWriteMode() ) {
649 if ( !$this->mEnableWrite
) {
650 $this->dieUsageMsg( 'writedisabled' );
652 if ( !$user->isAllowed( 'writeapi' ) ) {
653 $this->dieUsageMsg( 'writerequired' );
655 if ( wfReadOnly() ) {
656 $this->dieReadOnly();
662 * Check POST for external response and setup result printer
663 * @param $module ApiBase An Api module
664 * @param $params Array an array with the request parameters
666 protected function setupExternalResponse( $module, $params ) {
667 // Ignore mustBePosted() for internal calls
668 if ( $module->mustBePosted() && !$this->getRequest()->wasPosted() ) {
669 $this->dieUsageMsg( array( 'mustbeposted', $this->mAction
) );
672 // See if custom printer is used
673 $this->mPrinter
= $module->getCustomPrinter();
674 if ( is_null( $this->mPrinter
) ) {
675 // Create an appropriate printer
676 $this->mPrinter
= $this->createPrinterByName( $params['format'] );
679 if ( $this->mPrinter
->getNeedsRawData() ) {
680 $this->getResult()->setRawMode();
685 * Execute the actual module, without any error handling
687 protected function executeAction() {
688 $params = $this->setupExecuteAction();
689 $module = $this->setupModule();
691 $this->checkExecutePermissions( $module );
693 if ( !$this->checkMaxLag( $module, $params ) ) {
697 if ( !$this->mInternalMode
) {
698 $this->setupExternalResponse( $module, $params );
702 $module->profileIn();
704 wfRunHooks( 'APIAfterExecute', array( &$module ) );
705 $module->profileOut();
707 if ( !$this->mInternalMode
) {
709 $this->printResult( false );
714 * Print results using the current printer
716 * @param $isError bool
718 protected function printResult( $isError ) {
719 $this->getResult()->cleanUpUTF8();
720 $printer = $this->mPrinter
;
721 $printer->profileIn();
724 * If the help message is requested in the default (xmlfm) format,
725 * tell the printer not to escape ampersands so that our links do
728 $printer->setUnescapeAmps( ( $this->mAction
== 'help' ||
$isError )
729 && $printer->getFormat() == 'XML' && $printer->getIsHtml() );
731 $printer->initPrinter( $isError );
734 $printer->closePrinter();
735 $printer->profileOut();
741 public function isReadMode() {
746 * See ApiBase for description.
750 public function getAllowedParams() {
753 ApiBase
::PARAM_DFLT
=> ApiMain
::API_DEFAULT_FORMAT
,
754 ApiBase
::PARAM_TYPE
=> $this->mFormatNames
757 ApiBase
::PARAM_DFLT
=> 'help',
758 ApiBase
::PARAM_TYPE
=> $this->mModuleNames
762 ApiBase
::PARAM_TYPE
=> 'integer'
765 ApiBase
::PARAM_TYPE
=> 'integer',
766 ApiBase
::PARAM_DFLT
=> 0
769 ApiBase
::PARAM_TYPE
=> 'integer',
770 ApiBase
::PARAM_DFLT
=> 0
778 * See ApiBase for description.
782 public function getParamDescription() {
784 'format' => 'The format of the output',
785 'action' => 'What action you would like to perform. See below for module help',
786 'version' => 'When showing help, include version for each module',
788 'Maximum lag can be used when MediaWiki is installed on a database replicated cluster.',
789 'To save actions causing any more site replication lag, this parameter can make the client',
790 'wait until the replication lag is less than the specified value.',
791 'In case of a replag error, a HTTP 503 error is returned, with the message like',
792 '"Waiting for $host: $lag seconds lagged\n".',
793 'See http://www.mediawiki.org/wiki/Manual:Maxlag_parameter for more information',
795 'smaxage' => 'Set the s-maxage header to this many seconds. Errors are never cached',
796 'maxage' => 'Set the max-age header to this many seconds. Errors are never cached',
797 'requestid' => 'Request ID to distinguish requests. This will just be output back to you',
798 'servedby' => 'Include the hostname that served the request in the results. Unconditionally shown on error',
803 * See ApiBase for description.
807 public function getDescription() {
811 '**********************************************************************************************************',
813 '** This is an auto-generated MediaWiki API documentation page **',
815 '** Documentation and Examples: **',
816 '** http://www.mediawiki.org/wiki/API **',
818 '**********************************************************************************************************',
820 'Status: All features shown on this page should be working, but the API',
821 ' is still in active development, and may change at any time.',
822 ' Make sure to monitor our mailing list for any updates',
824 'Erroneous requests: When erroneous requests are sent to the API, a HTTP header will be sent',
825 ' with the key "MediaWiki-API-Error" and then both the value of the',
826 ' header and the error code sent back will be set to the same value',
828 ' In the case of an invalid action being passed, these will have a value',
829 ' of "unknown_action"',
831 ' For more information see http://www.mediawiki.org/wiki/API:Errors_and_warnings',
833 'Documentation: https://www.mediawiki.org/wiki/API:Main_page',
834 'FAQ https://www.mediawiki.org/wiki/API:FAQ',
835 'Mailing list: https://lists.wikimedia.org/mailman/listinfo/mediawiki-api',
836 'Api Announcements: https://lists.wikimedia.org/mailman/listinfo/mediawiki-api-announce',
837 'Bugs & Requests: https://bugzilla.wikimedia.org/buglist.cgi?component=API&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&order=bugs.delta_ts',
849 public function getPossibleErrors() {
850 return array_merge( parent
::getPossibleErrors(), array(
851 array( 'readonlytext' ),
852 array( 'code' => 'unknown_format', 'info' => 'Unrecognized format: format' ),
853 array( 'code' => 'unknown_action', 'info' => 'The API requires a valid action parameter' ),
854 array( 'code' => 'maxlag', 'info' => 'Waiting for host: x seconds lagged' ),
855 array( 'code' => 'maxlag', 'info' => 'Waiting for a database server: x seconds lagged' ),
860 * Returns an array of strings with credits for the API
863 protected function getCredits() {
866 ' Roan Kattouw <Firstname>.<Lastname>@gmail.com (lead developer Sep 2007-present)',
867 ' Victor Vasiliev - vasilvv at gee mail dot com',
868 ' Bryan Tong Minh - bryan . tongminh @ gmail . com',
869 ' Sam Reed - sam @ reedyboy . net',
870 ' Yuri Astrakhan <Firstname><Lastname>@gmail.com (creator, lead developer Sep 2006-Sep 2007)',
872 'Please send your comments, suggestions and questions to mediawiki-api@lists.wikimedia.org',
873 'or file a bug report at http://bugzilla.wikimedia.org/'
878 * Sets whether the pretty-printer should format *bold* and $italics$
882 public function setHelp( $help = true ) {
883 $this->mPrinter
->setHelp( $help );
887 * Override the parent to generate help messages for all available modules.
891 public function makeHelpMsg() {
892 global $wgMemc, $wgAPICacheHelpTimeout;
894 // Get help text from cache if present
895 $key = wfMemcKey( 'apihelp', $this->getModuleName(),
896 SpecialVersion
::getVersion( 'nodb' ) .
897 $this->getShowVersions() );
898 if ( $wgAPICacheHelpTimeout > 0 ) {
899 $cached = $wgMemc->get( $key );
904 $retval = $this->reallyMakeHelpMsg();
905 if ( $wgAPICacheHelpTimeout > 0 ) {
906 $wgMemc->set( $key, $retval, $wgAPICacheHelpTimeout );
912 * @return mixed|string
914 public function reallyMakeHelpMsg() {
917 // Use parent to make default message for the main module
918 $msg = parent
::makeHelpMsg();
920 $astriks = str_repeat( '*** ', 14 );
921 $msg .= "\n\n$astriks Modules $astriks\n\n";
922 foreach ( array_keys( $this->mModules
) as $moduleName ) {
923 $module = new $this->mModules
[$moduleName] ( $this, $moduleName );
924 $msg .= self
::makeHelpMsgHeader( $module, 'action' );
925 $msg2 = $module->makeHelpMsg();
926 if ( $msg2 !== false ) {
932 $msg .= "\n$astriks Permissions $astriks\n\n";
933 foreach ( self
::$mRights as $right => $rightMsg ) {
934 $groups = User
::getGroupsWithPermission( $right );
935 $msg .= "* " . $right . " *\n " . wfMsgReplaceArgs( $rightMsg[ 'msg' ], $rightMsg[ 'params' ] ) .
936 "\nGranted to:\n " . str_replace( '*', 'all', implode( ', ', $groups ) ) . "\n\n";
940 $msg .= "\n$astriks Formats $astriks\n\n";
941 foreach ( array_keys( $this->mFormats
) as $formatName ) {
942 $module = $this->createPrinterByName( $formatName );
943 $msg .= self
::makeHelpMsgHeader( $module, 'format' );
944 $msg2 = $module->makeHelpMsg();
945 if ( $msg2 !== false ) {
951 $msg .= "\n*** Credits: ***\n " . implode( "\n ", $this->getCredits() ) . "\n";
957 * @param $module ApiBase
958 * @param $paramName String What type of request is this? e.g. action, query, list, prop, meta, format
961 public static function makeHelpMsgHeader( $module, $paramName ) {
962 $modulePrefix = $module->getModulePrefix();
963 if ( strval( $modulePrefix ) !== '' ) {
964 $modulePrefix = "($modulePrefix) ";
967 return "* $paramName={$module->getModuleName()} $modulePrefix*";
970 private $mCanApiHighLimits = null;
973 * Check whether the current user is allowed to use high limits
976 public function canApiHighLimits() {
977 if ( !isset( $this->mCanApiHighLimits
) ) {
978 $this->mCanApiHighLimits
= $this->getUser()->isAllowed( 'apihighlimits' );
981 return $this->mCanApiHighLimits
;
985 * Check whether the user wants us to show version information in the API help
988 public function getShowVersions() {
989 return $this->mShowVersions
;
993 * Returns the version information of this file, plus it includes
994 * the versions for all files that are not callable proper API modules
998 public function getVersion() {
1000 $vers[] = 'MediaWiki: ' . SpecialVersion
::getVersion() . "\n http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/";
1001 $vers[] = __CLASS__
. ': $Id$';
1002 $vers[] = ApiBase
::getBaseVersion();
1003 $vers[] = ApiFormatBase
::getBaseVersion();
1004 $vers[] = ApiQueryBase
::getBaseVersion();
1009 * Add or overwrite a module in this ApiMain instance. Intended for use by extending
1010 * classes who wish to add their own modules to their lexicon or override the
1011 * behavior of inherent ones.
1013 * @param $mdlName String The identifier for this module.
1014 * @param $mdlClass String The class where this module is implemented.
1016 protected function addModule( $mdlName, $mdlClass ) {
1017 $this->mModules
[$mdlName] = $mdlClass;
1021 * Add or overwrite an output format for this ApiMain. Intended for use by extending
1022 * classes who wish to add to or modify current formatters.
1024 * @param $fmtName string The identifier for this format.
1025 * @param $fmtClass ApiFormatBase The class implementing this format.
1027 protected function addFormat( $fmtName, $fmtClass ) {
1028 $this->mFormats
[$fmtName] = $fmtClass;
1032 * Get the array mapping module names to class names
1035 function getModules() {
1036 return $this->mModules
;
1040 * Returns the list of supported formats in form ( 'format' => 'ClassName' )
1045 public function getFormats() {
1046 return $this->mFormats
;
1051 * This exception will be thrown when dieUsage is called to stop module execution.
1052 * The exception handling code will print a help screen explaining how this API may be used.
1056 class UsageException
extends Exception
{
1059 private $mExtraData;
1061 public function __construct( $message, $codestr, $code = 0, $extradata = null ) {
1062 parent
::__construct( $message, $code );
1063 $this->mCodestr
= $codestr;
1064 $this->mExtraData
= $extradata;
1070 public function getCodeString() {
1071 return $this->mCodestr
;
1077 public function getMessageArray() {
1079 'code' => $this->mCodestr
,
1080 'info' => $this->getMessage()
1082 if ( is_array( $this->mExtraData
) ) {
1083 $result = array_merge( $result, $this->mExtraData
);
1091 public function __toString() {
1092 return "{$this->getCodeString()}: {$this->getMessage()}";