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( function ( mw, $ ) {
/**
* @class mw.Api
*/
/**
* @property {Object} defaultOptions Default options for #ajax calls. Can be overridden by passing
* `options` to mw.Api constructor.
* @property {Object} defaultOptions.parameters Default query parameters for API requests.
* @property {Object} defaultOptions.ajax Default options for jQuery#ajax.
* @private
*/
var defaultOptions = {
parameters: {
action: 'query',
format: 'json'
},
ajax: {
url: mw.util.wikiScript( 'api' ),
timeout: 30 * 1000, // 30 seconds
dataType: 'json'
}
},
// Keyed by ajax url and symbolic name for the individual request
promises = {};
function mapLegacyToken( action ) {
// Legacy types for backward-compatibility with API action=tokens.
var csrfActions = [
'edit',
'delete',
'protect',
'move',
'block',
'unblock',
'email',
'import',
'options'
];
if ( $.inArray( action, csrfActions ) !== -1 ) {
mw.track( 'mw.deprecate', 'apitoken_' + action );
mw.log.warn( 'Use of the "' + action + '" token is deprecated. Use "csrf" instead.' );
return 'csrf';
}
return action;
}
// Pre-populate with fake ajax promises to save http requests for tokens
// we already have on the page via the user.tokens module (bug 34733).
promises[ defaultOptions.ajax.url ] = {};
$.each( mw.user.tokens.get(), function ( key, value ) {
// This requires #getToken to use the same key as user.tokens.
// Format: token-type + "Token" (eg. csrfToken, patrolToken, watchToken).
promises[ defaultOptions.ajax.url ][ key ] = $.Deferred()
.resolve( value )
.promise( { abort: function () {} } );
} );
/**
* Constructor to create an object to interact with the API of a particular MediaWiki server.
* mw.Api objects represent the API of a particular MediaWiki server.
*
* var api = new mw.Api();
* api.get( {
* action: 'query',
* meta: 'userinfo'
* } ).done( function ( data ) {
* console.log( data );
* } );
*
* Since MW 1.25, multiple values for a parameter can be specified using an array:
*
* var api = new mw.Api();
* api.get( {
* action: 'query',
* meta: [ 'userinfo', 'siteinfo' ] // same effect as 'userinfo|siteinfo'
* } ).done( function ( data ) {
* console.log( data );
* } );
*
* Since MW 1.26, boolean values for a parameter can be specified directly. If the value is
* `false` or `undefined`, the parameter will be omitted from the request, as required by the API.
*
* @constructor
* @param {Object} [options] See #defaultOptions documentation above. Can also be overridden for
* each individual request by passing them to #get or #post (or directly #ajax) later on.
*/
mw.Api = function ( options ) {
options = options || {};
// Force a string if we got a mw.Uri object
if ( options.ajax && options.ajax.url !== undefined ) {
options.ajax.url = String( options.ajax.url );
}
options.parameters = $.extend( {}, defaultOptions.parameters, options.parameters );
options.ajax = $.extend( {}, defaultOptions.ajax, options.ajax );
this.defaults = options;
this.requests = [];
};
mw.Api.prototype = {
/**
* Abort all unfinished requests issued by this Api object.
*
* @method
*/
abort: function () {
$.each( this.requests, function ( index, request ) {
if ( request ) {
request.abort();
}
} );
},
/**
* Perform API get request
*
* @param {Object} parameters
* @param {Object} [ajaxOptions]
* @return {jQuery.Promise}
*/
get: function ( parameters, ajaxOptions ) {
ajaxOptions = ajaxOptions || {};
ajaxOptions.type = 'GET';
return this.ajax( parameters, ajaxOptions );
},
/**
* Perform API post request
*
* @param {Object} parameters
* @param {Object} [ajaxOptions]
* @return {jQuery.Promise}
*/
post: function ( parameters, ajaxOptions ) {
ajaxOptions = ajaxOptions || {};
ajaxOptions.type = 'POST';
return this.ajax( parameters, ajaxOptions );
},
/**
* Massage parameters from the nice format we accept into a format suitable for the API.
*
* @private
* @param {Object} parameters (modified in-place)
*/
preprocessParameters: function ( parameters ) {
var key;
// Handle common MediaWiki API idioms for passing parameters
for ( key in parameters ) {
// Multiple values are pipe-separated
if ( $.isArray( parameters[ key ] ) ) {
parameters[ key ] = parameters[ key ].join( '|' );
}
// Boolean values are only false when not given at all
if ( parameters[ key ] === false || parameters[ key ] === undefined ) {
delete parameters[ key ];
}
}
},
/**
* Perform the API call.
*
* @param {Object} parameters
* @param {Object} [ajaxOptions]
* @return {jQuery.Promise} Done: API response data and the jqXHR object.
* Fail: Error code
*/
ajax: function ( parameters, ajaxOptions ) {
var token, requestIndex,
api = this,
apiDeferred = $.Deferred(),
xhr, key, formData;
parameters = $.extend( {}, this.defaults.parameters, parameters );
ajaxOptions = $.extend( {}, this.defaults.ajax, ajaxOptions );
// Ensure that token parameter is last (per [[mw:API:Edit#Token]]).
if ( parameters.token ) {
token = parameters.token;
delete parameters.token;
}
this.preprocessParameters( parameters );
// If multipart/form-data has been requested and emulation is possible, emulate it
if (
ajaxOptions.type === 'POST' &&
window.FormData &&
ajaxOptions.contentType === 'multipart/form-data'
) {
formData = new FormData();
for ( key in parameters ) {
formData.append( key, parameters[ key ] );
}
// If we extracted a token parameter, add it back in.
if ( token ) {
formData.append( 'token', token );
}
ajaxOptions.data = formData;
// Prevent jQuery from mangling our FormData object
ajaxOptions.processData = false;
// Prevent jQuery from overriding the Content-Type header
ajaxOptions.contentType = false;
} else {
// This works because jQuery accepts data as a query string or as an Object
ajaxOptions.data = $.param( parameters );
// If we extracted a token parameter, add it back in.
if ( token ) {
ajaxOptions.data += '&token=' + encodeURIComponent( token );
}
// Depending on server configuration, MediaWiki may forbid periods in URLs, due to an IE 6
// XSS bug. So let's escape them here. See WebRequest::checkUrlExtension() and T30235.
ajaxOptions.data = ajaxOptions.data.replace( /\./g, '%2E' );
if ( ajaxOptions.contentType === 'multipart/form-data' ) {
// We were asked to emulate but can't, so drop the Content-Type header, otherwise
// it'll be wrong and the server will fail to decode the POST body
delete ajaxOptions.contentType;
}
}
// Make the AJAX request
xhr = $.ajax( ajaxOptions )
// If AJAX fails, reject API call with error code 'http'
// and details in second argument.
.fail( function ( xhr, textStatus, exception ) {
apiDeferred.reject( 'http', {
xhr: xhr,
textStatus: textStatus,
exception: exception
} );
} )
// AJAX success just means "200 OK" response, also check API error codes
.done( function ( result, textStatus, jqXHR ) {
if ( result === undefined || result === null || result === '' ) {
apiDeferred.reject( 'ok-but-empty',
'OK response but empty result (check HTTP headers?)',
result,
jqXHR
);
} else if ( result.error ) {
var code = result.error.code === undefined ? 'unknown' : result.error.code;
apiDeferred.reject( code, result, result, jqXHR );
} else {
apiDeferred.resolve( result, jqXHR );
}
} );
requestIndex = this.requests.length;
this.requests.push( xhr );
xhr.always( function () {
api.requests[ requestIndex ] = null;
} );
// Return the Promise
return apiDeferred.promise( { abort: xhr.abort } ).fail( function ( code, details ) {
if ( !( code === 'http' && details && details.textStatus === 'abort' ) ) {
mw.log( 'mw.Api error: ', code, details );
}
} );
},
/**
* Post to API with specified type of token. If we have no token, get one and try to post.
* If we have a cached token try using that, and if it fails, blank out the
* cached token and start over. For example to change an user option you could do:
*
* new mw.Api().postWithToken( 'csrf', {
* action: 'options',
* optionname: 'gender',
* optionvalue: 'female'
* } );
*
* @param {string} tokenType The name of the token, like options or edit.
* @param {Object} params API parameters
* @param {Object} [ajaxOptions]
* @return {jQuery.Promise} See #post
* @since 1.22
*/
postWithToken: function ( tokenType, params, ajaxOptions ) {
var api = this;
return api.getToken( tokenType, params.assert ).then( function ( token ) {
params.token = token;
return api.post( params, ajaxOptions ).then(
// If no error, return to caller as-is
null,
// Error handler
function ( code ) {
if ( code === 'badtoken' ) {
api.badToken( tokenType );
// Try again, once
params.token = undefined;
return api.getToken( tokenType, params.assert ).then( function ( token ) {
params.token = token;
return api.post( params, ajaxOptions );
} );
}
// Different error, pass on to let caller handle the error code
return this;
}
);
} );
},
/**
* Get a token for a certain action from the API.
*
* The assert parameter is only for internal use by #postWithToken.
*
* @since 1.22
* @param {string} type Token type
* @return {jQuery.Promise} Received token.
*/
getToken: function ( type, assert ) {
var apiPromise, promiseGroup, d;
type = mapLegacyToken( type );
promiseGroup = promises[ this.defaults.ajax.url ];
d = promiseGroup && promiseGroup[ type + 'Token' ];
if ( !d ) {
apiPromise = this.get( {
action: 'query',
meta: 'tokens',
type: type,
assert: assert
} );
d = apiPromise
.then( function ( res ) {
// If token type is unknown, it is omitted from the response
if ( !res.query.tokens[ type + 'token' ] ) {
return $.Deferred().reject( 'token-missing', res );
}
return res.query.tokens[ type + 'token' ];
}, function () {
// Clear promise. Do not cache errors.
delete promiseGroup[ type + 'Token' ];
// Pass on to allow the caller to handle the error
return this;
} )
// Attach abort handler
.promise( { abort: apiPromise.abort } );
// Store deferred now so that we can use it again even if it isn't ready yet
if ( !promiseGroup ) {
promiseGroup = promises[ this.defaults.ajax.url ] = {};
}
promiseGroup[ type + 'Token' ] = d;
}
return d;
},
/**
* Indicate that the cached token for a certain action of the API is bad.
*
* Call this if you get a 'badtoken' error when using the token returned by #getToken.
* You may also want to use #postWithToken instead, which invalidates bad cached tokens
* automatically.
*
* @param {string} type Token type
* @since 1.26
*/
badToken: function ( type ) {
var promiseGroup = promises[ this.defaults.ajax.url ];
type = mapLegacyToken( type );
if ( promiseGroup ) {
delete promiseGroup[ type + 'Token' ];
}
}
};
/**
* @static
* @property {Array}
* List of errors we might receive from the API.
* For now, this just documents our expectation that there should be similar messages
* available.
*/
mw.Api.errors = [
// occurs when POST aborted
// jQuery 1.4 can't distinguish abort or lost connection from 200 OK + empty result
'ok-but-empty',
// timeout
'timeout',
// really a warning, but we treat it like an error
'duplicate',
'duplicate-archive',
// upload succeeded, but no image info.
// this is probably impossible, but might as well check for it
'noimageinfo',
// remote errors, defined in API
'uploaddisabled',
'nomodule',
'mustbeposted',
'badaccess-groups',
'missingresult',
'missingparam',
'invalid-file-key',
'copyuploaddisabled',
'mustbeloggedin',
'empty-file',
'file-too-large',
'filetype-missing',
'filetype-banned',
'filetype-banned-type',
'filename-tooshort',
'illegal-filename',
'verification-error',
'hookaborted',
'unknown-error',
'internal-error',
'overwrite',
'badtoken',
'fetchfileerror',
'fileexists-shared-forbidden',
'invalidtitle',
'notloggedin',
'autoblocked',
'blocked',
// Stash-specific errors - expanded
'stashfailed',
'stasherror',
'stashedfilenotfound',
'stashpathinvalid',
'stashfilestorage',
'stashzerolength',
'stashnotloggedin',
'stashwrongowner',
'stashnosuchfilekey'
];
/**
* @static
* @property {Array}
* List of warnings we might receive from the API.
* For now, this just documents our expectation that there should be similar messages
* available.
*/
mw.Api.warnings = [
'duplicate',
'exists'
];
}( mediaWiki, jQuery ) );