<?php
-
/*
* Created on Sep 4, 2006
*
* API for MediaWiki 1.8+
*
- * Copyright (C) 2006 Yuri Astrakhan <FirstnameLastname@gmail.com>
+ * Copyright (C) 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
require_once ('ApiBase.php');
}
+/**
+ * This is the main API class, used for both external and internal processing.
+ * When executed, it will create the requested formatter object,
+ * instantiate and execute an object associated with the needed action,
+ * and use formatter to print results.
+ * In case of an exception, an error message will be printed using the same formatter.
+ *
+ * To use API from another application, run it using FauxRequest object, in which
+ * case any internal exceptions will not be handled but passed up to the caller.
+ * After successful execution, use getResult() for the resulting data.
+ *
+ * @addtogroup API
+ */
class ApiMain extends ApiBase {
+ /**
+ * When no format parameter is given, this format will be used
+ */
+ const API_DEFAULT_FORMAT = 'xmlfm';
+
+ /**
+ * List of available modules: action name => module class
+ */
+ private static $Modules = array (
+ 'login' => 'ApiLogin',
+ 'query' => 'ApiQuery',
+ 'expandtemplates' => 'ApiExpandTemplates',
+ 'render' => 'ApiRender',
+ 'opensearch' => 'ApiOpenSearch',
+ 'feedwatchlist' => 'ApiFeedWatchlist',
+ 'help' => 'ApiHelp',
+ );
+
+ /**
+ * List of available formats: format name => format class
+ */
+ private static $Formats = array (
+ 'json' => 'ApiFormatJson',
+ 'jsonfm' => 'ApiFormatJson',
+ 'php' => 'ApiFormatPhp',
+ 'phpfm' => 'ApiFormatPhp',
+ 'wddx' => 'ApiFormatWddx',
+ 'wddxfm' => 'ApiFormatWddx',
+ 'xml' => 'ApiFormatXml',
+ 'xmlfm' => 'ApiFormatXml',
+ 'yaml' => 'ApiFormatYaml',
+ 'yamlfm' => 'ApiFormatYaml',
+ 'rawfm' => 'ApiFormatJson'
+ );
+
private $mPrinter, $mModules, $mModuleNames, $mFormats, $mFormatNames;
- private $mApiStartTime, $mResult, $mShowVersions, $mEnableWrite;
+ private $mResult, $mAction, $mShowVersions, $mEnableWrite, $mRequest, $mInternalMode, $mSquidMaxage;
/**
- * Constructor
- * $apiStartTime - time of the originating call for profiling purposes
- * $modules - an array of actions (keys) and classes that handle them (values)
+ * Constructs an instance of ApiMain that utilizes the module and format specified by $request.
+ *
+ * @param $request object - if this is an instance of FauxRequest, errors are thrown and no printing occurs
+ * @param $enableWrite bool should be set to true if the api may modify data
*/
- public function __construct($apiStartTime, $modules, $formats, $enableWrite) {
+ public function __construct($request, $enableWrite = false) {
+
+ $this->mInternalMode = ($request instanceof FauxRequest);
+
// Special handling for the main module: $parent === $this
- parent :: __construct($this, 'main');
+ parent :: __construct($this, $this->mInternalMode ? 'main_int' : 'main');
+
+ if (!$this->mInternalMode) {
+
+ // Impose module restrictions.
+ // If the current user cannot read,
+ // Remove all modules other than login
+ global $wgUser;
+ if (!$wgUser->isAllowed('read')) {
+ self::$Modules = array(
+ 'login' => self::$Modules['login'],
+ 'help' => self::$Modules['help']
+ );
+ }
+ }
+
+ global $wgAPIModules; // extension modules
+ $this->mModules = $wgAPIModules + self :: $Modules;
+
+ $this->mModuleNames = array_keys($this->mModules); // todo: optimize
+ $this->mFormats = self :: $Formats;
+ $this->mFormatNames = array_keys($this->mFormats); // todo: optimize
- $this->mModules = $modules;
- $this->mModuleNames = array_keys($modules);
- $this->mFormats = $formats;
- $this->mFormatNames = array_keys($formats);
- $this->mApiStartTime = $apiStartTime;
$this->mResult = new ApiResult($this);
$this->mShowVersions = false;
$this->mEnableWrite = $enableWrite;
-
- // Initialize Error handler
- set_exception_handler( array($this, 'exceptionHandler') );
+
+ $this->mRequest = & $request;
+
+ $this->mSquidMaxage = 0;
}
- public function & getResult() {
- return $this->mResult;
+ /**
+ * Return true if the API was started by other PHP code using FauxRequest
+ */
+ public function isInternalMode() {
+ return $this->mInternalMode;
}
- public function getShowVersions() {
- return $this->mShowVersions;
+ /**
+ * Return the request object that contains client's request
+ */
+ public function getRequest() {
+ return $this->mRequest;
+ }
+
+ /**
+ * Get the ApiResult object asscosiated with current request
+ */
+ public function getResult() {
+ return $this->mResult;
}
+ /**
+ * This method will simply cause an error if the write mode was disabled for this api.
+ */
public function requestWriteMode() {
if (!$this->mEnableWrite)
$this->dieUsage('Editing of this site is disabled. Make sure the $wgEnableWriteAPI=true; ' .
'statement is included in the site\'s LocalSettings.php file', 'readonly');
}
- protected function getAllowedParams() {
- return array (
- 'format' => array (
- ApiBase :: PARAM_DFLT => API_DEFAULT_FORMAT,
- ApiBase :: PARAM_TYPE => $this->mFormatNames
- ),
- 'action' => array (
- ApiBase :: PARAM_DFLT => 'help',
- ApiBase :: PARAM_TYPE => $this->mModuleNames
- ),
- 'version' => false
- );
+ /**
+ * Set how long the response should be cached.
+ */
+ public function setCacheMaxAge($maxage) {
+ $this->mSquidMaxage = $maxage;
}
- protected function getParamDescription() {
- return array (
- 'format' => 'The format of the output',
- 'action' => 'What action you would like to perform',
- 'version' => 'When showing help, include version for each module'
- );
+ /**
+ * Create an instance of an output formatter by its name
+ */
+ public function createPrinterByName($format) {
+ return new $this->mFormats[$format] ($this, $format);
}
+ /**
+ * Execute api request. Any errors will be handled if the API was called by the remote client.
+ */
public function execute() {
$this->profileIn();
- $action = $format = $version = null;
+ if ($this->mInternalMode)
+ $this->executeAction();
+ else
+ $this->executeActionWithErrorHandling();
+ $this->profileOut();
+ }
+
+ /**
+ * Execute an action, and in case of an error, erase whatever partial results
+ * have been accumulated, and replace it with an error message and a help screen.
+ */
+ protected function executeActionWithErrorHandling() {
+
+ // In case an error occurs during data output,
+ // clear the output buffer and print just the error information
+ ob_start();
+
try {
- extract($this->extractRequestParams());
- $this->mShowVersions = $version;
+ $this->executeAction();
+ } catch (Exception $e) {
+ //
+ // Handle any kind of exception by outputing properly formatted error message.
+ // If this fails, an unhandled exception should be thrown so that global error
+ // handler will process and log it.
+ //
+
+ $errCode = $this->substituteResultWithError($e);
+
+ // Error results should not be cached
+ $this->setCacheMaxAge(0);
+
+ $headerStr = 'MediaWiki-API-Error: ' . $errCode;
+ if ($e->getCode() === 0)
+ header($headerStr, true);
+ else
+ header($headerStr, true, $e->getCode());
+
+ // Reset and print just the error message
+ ob_clean();
+
+ // If the error occured during printing, do a printer->profileOut()
+ $this->mPrinter->safeProfileOut();
+ $this->printResult(true);
+ }
- // Create an appropriate printer
- $this->mPrinter = new $this->mFormats[$format] ($this, $format);
+ // Set the cache expiration at the last moment, as any errors may change the expiration.
+ // if $this->mSquidMaxage == 0, the expiry time is set to the first second of unix epoch
+ $expires = $this->mSquidMaxage == 0 ? 1 : time() + $this->mSquidMaxage;
+ header('Expires: ' . wfTimestamp(TS_RFC2822, $expires));
+ header('Cache-Control: s-maxage=' . $this->mSquidMaxage . ', must-revalidate, max-age=0');
- // Instantiate and execute module requested by the user
- $module = new $this->mModules[$action] ($this, $action);
- $module->profileIn();
- $module->execute();
- $module->profileOut();
- $this->printResult(false);
+ if($this->mPrinter->getIsHtml())
+ echo wfReportTime();
+
+ ob_end_flush();
+ }
+
+ /**
+ * Replace the result data with the information about an exception.
+ * Returns the error code
+ */
+ protected function substituteResultWithError($e) {
+
+ // Printer may not be initialized if the extractRequestParams() fails for the main module
+ if (!isset ($this->mPrinter)) {
+ // The printer has not been created yet. Try to manually get formatter value.
+ $value = $this->getRequest()->getVal('format', self::API_DEFAULT_FORMAT);
+ if (!in_array($value, $this->mFormatNames))
+ $value = self::API_DEFAULT_FORMAT;
+
+ $this->mPrinter = $this->createPrinterByName($value);
+ if ($this->mPrinter->getNeedsRawData())
+ $this->getResult()->setRawMode();
+ }
+
+ if ($e instanceof UsageException) {
+ //
+ // User entered incorrect parameters - print usage screen
+ //
+ $errMessage = array (
+ 'code' => $e->getCodeString(),
+ 'info' => $e->getMessage());
+
+ // Only print the help message when this is for the developer, not runtime
+ if ($this->mPrinter->getIsHtml() || $this->mAction == 'help')
+ ApiResult :: setContent($errMessage, $this->makeHelpMsg());
+
+ } else {
+ //
+ // Something is seriously wrong
+ //
+ $errMessage = array (
+ 'code' => 'internal_api_error_'. get_class($e),
+ 'info' => "Exception Caught: {$e->getMessage()}"
+ );
+ ApiResult :: setContent($errMessage, "\n\n{$e->getTraceAsString()}\n\n");
+ }
+
+ $this->getResult()->reset();
+ $this->getResult()->addValue(null, 'error', $errMessage);
+
+ return $errMessage['code'];
+ }
+
+ /**
+ * Execute the actual module, without any error handling
+ */
+ protected function executeAction() {
+
+ $params = $this->extractRequestParams();
+
+ $this->mShowVersions = $params['version'];
+ $this->mAction = $params['action'];
- } catch (UsageException $e) {
- $this->printError();
+ // Instantiate the module requested by the user
+ $module = new $this->mModules[$this->mAction] ($this, $this->mAction);
+
+ if( $module->shouldCheckMaxlag() && isset( $params['maxlag'] ) ) {
+ // Check for maxlag
+ global $wgLoadBalancer, $wgShowHostnames;
+ $maxLag = $params['maxlag'];
+ list( $host, $lag ) = $wgLoadBalancer->getMaxLag();
+ if ( $lag > $maxLag ) {
+ if( $wgShowHostnames ) {
+ ApiBase :: dieUsage( "Waiting for $host: $lag seconds lagged", 'maxlag' );
+ } else {
+ ApiBase :: dieUsage( "Waiting for a database server: $lag seconds lagged", 'maxlag' );
+ }
+ return;
+ }
+ }
+
+ if (!$this->mInternalMode) {
+
+ // See if custom printer is used
+ $this->mPrinter = $module->getCustomPrinter();
+ if (is_null($this->mPrinter)) {
+ // Create an appropriate printer
+ $this->mPrinter = $this->createPrinterByName($params['format']);
+ }
+
+ if ($this->mPrinter->getNeedsRawData())
+ $this->getResult()->setRawMode();
+ }
+
+ // Execute
+ $module->profileIn();
+ $module->execute();
+ $module->profileOut();
+
+ if (!$this->mInternalMode) {
+ // Print result data
+ $this->printResult(false);
}
- $this->profileOut();
}
/**
- * Internal printer
+ * Print results using the current printer
*/
- private function printResult($isError) {
+ protected function printResult($isError) {
$printer = $this->mPrinter;
$printer->profileIn();
+
+ /* If the help message is requested in the default (xmlfm) format,
+ * tell the printer not to escape ampersands so that our links do
+ * not break. */
+ $params = $this->extractRequestParams();
+ $printer->setUnescapeAmps ( ( $this->mAction == 'help' || $isError )
+ && $params['format'] == ApiMain::API_DEFAULT_FORMAT );
+
$printer->initPrinter($isError);
- if (!$printer->getNeedsRawData())
- $this->getResult()->SanitizeData();
+
$printer->execute();
$printer->closePrinter();
$printer->profileOut();
}
-
- private function printError() {
- // Printer may not be initialized if the extractRequestParams() fails for the main module
- if (!isset ($this->mPrinter))
- $this->mPrinter = new $this->mFormats[API_DEFAULT_FORMAT] ($this, API_DEFAULT_FORMAT);
- $this->printResult(true);
- }
- protected function getDescription() {
+ /**
+ * See ApiBase for description.
+ */
+ protected function getAllowedParams() {
return array (
- '',
- 'This API allows programs to access various functions of MediaWiki software.',
- 'For more details see API Home Page @ http://meta.wikimedia.org/wiki/API',
- ''
+ 'format' => array (
+ ApiBase :: PARAM_DFLT => ApiMain :: API_DEFAULT_FORMAT,
+ ApiBase :: PARAM_TYPE => $this->mFormatNames
+ ),
+ 'action' => array (
+ ApiBase :: PARAM_DFLT => 'help',
+ ApiBase :: PARAM_TYPE => $this->mModuleNames
+ ),
+ 'version' => false,
+ 'maxlag' => array (
+ ApiBase :: PARAM_TYPE => 'integer'
+ ),
);
}
- public function mainDieUsage($description, $errorCode, $httpRespCode = 0) {
- if ($httpRespCode === 0)
- header($errorCode, true);
- else
- header($errorCode, true, $httpRespCode);
-
- $this->makeErrorMessage($description, $errorCode);
-
- throw new UsageException($description, $errorCode);
+ /**
+ * See ApiBase for description.
+ */
+ protected function getParamDescription() {
+ return array (
+ 'format' => 'The format of the output',
+ 'action' => 'What action you would like to perform',
+ 'version' => 'When showing help, include version for each module',
+ 'maxlag' => 'Maximum lag'
+ );
}
- public function makeErrorMessage($description, $errorCode, $customContent = null) {
- $this->mResult->Reset();
- $data = array (
- 'code' => $errorCode,
- 'info' => $description
+ /**
+ * See ApiBase for description.
+ */
+ protected function getDescription() {
+ return array (
+ '',
+ '',
+ '******************************************************************',
+ '** **',
+ '** This is an auto-generated MediaWiki API documentation page **',
+ '** **',
+ '** Documentation and Examples: **',
+ '** http://www.mediawiki.org/wiki/API **',
+ '** **',
+ '******************************************************************',
+ '',
+ 'Status: All features shown on this page should be working, but the API',
+ ' is still in active development, and may change at any time.',
+ ' Make sure to monitor our mailing list for any updates.',
+ '',
+ 'Documentation: http://www.mediawiki.org/wiki/API',
+ 'Mailing list: http://lists.wikimedia.org/mailman/listinfo/mediawiki-api',
+ 'Bugs & Requests: http://bugzilla.wikimedia.org/buglist.cgi?component=API&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&order=bugs.delta_ts',
+ '',
+ '',
+ '',
+ '',
+ '',
);
-
- ApiResult :: setContent($data,
- is_null($customContent) ? $this->makeHelpMsg() : $customContent);
-
- $this->mResult->addValue(null, 'error', $data);
}
+ /**
+ * Returns an array of strings with credits for the API
+ */
+ protected function getCredits() {
+ return array(
+ 'This API is being implemented by Yuri Astrakhan [[User:Yurik]] / <Firstname><Lastname>@gmail.com',
+ 'Please leave your comments and suggestions at http://www.mediawiki.org/wiki/API'
+ );
+ }
+
/**
* Override the parent to generate help messages for all available modules.
*/
$astriks = str_repeat('*** ', 10);
$msg .= "\n\n$astriks Modules $astriks\n\n";
- foreach ($this->mModules as $moduleName => $moduleClass) {
- $msg .= "* action=$moduleName *";
+ foreach( $this->mModules as $moduleName => $unused ) {
$module = new $this->mModules[$moduleName] ($this, $moduleName);
+ $msg .= self::makeHelpMsgHeader($module, 'action');
$msg2 = $module->makeHelpMsg();
if ($msg2 !== false)
$msg .= $msg2;
}
$msg .= "\n$astriks Formats $astriks\n\n";
- foreach ($this->mFormats as $moduleName => $moduleClass) {
- $msg .= "* format=$moduleName *";
- $module = new $this->mFormats[$moduleName] ($this, $moduleName);
+ foreach( $this->mFormats as $formatName => $unused ) {
+ $module = $this->createPrinterByName($formatName);
+ $msg .= self::makeHelpMsgHeader($module, 'format');
$msg2 = $module->makeHelpMsg();
if ($msg2 !== false)
$msg .= $msg2;
$msg .= "\n";
}
+
+ $msg .= "\n*** Credits: ***\n " . implode("\n ", $this->getCredits()) . "\n";
+
return $msg;
}
-
- /**
- * Exception handler which simulates the appropriate catch() handling:
- *
- * try {
- * ...
- * } catch ( MWException $e ) {
- * dieUsage()
- * } catch ( Exception $e ) {
- * echo $e->__toString();
- * }
- *
- *
- *
- *
- * !!!!!!!!!!!!! REVIEW needed !!!!!!!!!!!!!!!!!!
- *
- * this method needs to be reviewed/cleaned up
- *
- *
- *
- */
- public function exceptionHandler( $e ) {
- global $wgFullyInitialised;
- if ( is_a( $e, 'MWException' ) ) {
- try {
- $msg = "Exception Caught: {$e->getMessage()}";
- $this->makeErrorMessage($msg, 'internal_error', "\n\n{$e->getTraceAsString()}\n\n");
- $this->printError();
- } catch (Exception $e2) {
- echo $e->__toString();
- }
- } else {
- echo $e->__toString();
- }
-
- // Final cleanup, similar to wfErrorExit()
- if ( $wgFullyInitialised ) {
- try {
- wfLogProfilingData(); // uses $wgRequest, hence the $wgFullyInitialised condition
- } catch ( Exception $e ) {}
- }
-
- // Exit value should be nonzero for the benefit of shell jobs
- exit( 1 );
- }
+ public static function makeHelpMsgHeader($module, $paramName) {
+ $modulePrefix = $module->getModulePrefix();
+ if (!empty($modulePrefix))
+ $modulePrefix = "($modulePrefix) ";
+
+ return "* $paramName={$module->getModuleName()} $modulePrefix*";
+ }
private $mIsBot = null;
+
+ private $mIsSysop = null;
+
+ /**
+ * Returns true if the currently logged in user is a bot, false otherwise
+ */
public function isBot() {
if (!isset ($this->mIsBot)) {
global $wgUser;
}
return $this->mIsBot;
}
+
+ /**
+ * Similar to isBot(), this method returns true if the logged in user is
+ * a sysop, and false if not.
+ */
+ public function isSysop() {
+ if (!isset ($this->mIsSysop)) {
+ global $wgUser;
+ $this->mIsSysop = in_array( 'sysop', $wgUser->getGroups());
+ }
+ return $this->mIsSysop;
+ }
+
+ public function getShowVersions() {
+ return $this->mShowVersions;
+ }
+
+ /**
+ * Returns the version information of this file, plus it includes
+ * the versions for all files that are not callable proper API modules
+ */
public function getVersion() {
$vers = array ();
+ $vers[] = 'MediaWiki ' . SpecialVersion::getVersion();
$vers[] = __CLASS__ . ': $Id$';
$vers[] = ApiBase :: getBaseVersion();
$vers[] = ApiFormatBase :: getBaseVersion();
$vers[] = ApiQueryBase :: getBaseVersion();
+ $vers[] = ApiFormatFeedWrapper :: getVersion(); // not accessible with format=xxx
return $vers;
}
+
+ /**
+ * Add or overwrite a module in this ApiMain instance. Intended for use by extending
+ * classes who wish to add their own modules to their lexicon or override the
+ * behavior of inherent ones.
+ *
+ * @access protected
+ * @param $mdlName String The identifier for this module.
+ * @param $mdlClass String The class where this module is implemented.
+ */
+ protected function addModule( $mdlName, $mdlClass ) {
+ $this->mModules[$mdlName] = $mdlClass;
+ }
+
+ /**
+ * Add or overwrite an output format for this ApiMain. Intended for use by extending
+ * classes who wish to add to or modify current formatters.
+ *
+ * @access protected
+ * @param $fmtName The identifier for this format.
+ * @param $fmtClass The class implementing this format.
+ */
+ protected function addFormat( $fmtName, $fmtClass ) {
+ $this->mFormats[$fmtName] = $fmtClass;
+ }
}
/**
-* @desc This exception will be thrown when dieUsage is called to stop module execution.
-*/
+ * This exception will be thrown when dieUsage is called to stop module execution.
+ * The exception handling code will print a help screen explaining how this API may be used.
+ *
+ * @addtogroup API
+ */
class UsageException extends Exception {
- private $codestr;
+ private $mCodestr;
- public function __construct($message, $codestr) {
- parent :: __construct($message);
- $this->codestr = $codestr;
+ public function __construct($message, $codestr, $code = 0) {
+ parent :: __construct($message, $code);
+ $this->mCodestr = $codestr;
+ }
+ public function getCodeString() {
+ return $this->mCodestr;
}
public function __toString() {
- return "{$this->codestr}: {$this->message}";
+ return "{$this->getCodeString()}: {$this->getMessage()}";
}
}
-?>
\ No newline at end of file
+
+
dépôts / lhc / web / wiklou.git / blobdiff