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rest.js
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rest.js
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( function () {
/**
* @typedef {Object} mw.Rest.Options
* @property {Object} [ajax={ url: mw.util.wikiScript( 'rest' ), timeout: 30 * 1000 }] Default
* options for [ajax()]{@link mw.Rest#ajax} calls. Can be overridden by passing `options` to
* the {@link mw.Rest} constructor.
*/
/**
* @type {mw.Rest.Options}
* @private
*/
const defaultOptions = {
ajax: {
url: mw.util.wikiScript( 'rest' ),
timeout: 30 * 1000 // 30 seconds
}
};
/**
* Lower cases the key names in the provided object.
*
* @param {Object} headers
* @return {Object}
* @private
*/
function objectKeysToLowerCase( headers ) {
return Object.keys( headers || {} ).reduce( ( updatedHeaders, key ) => {
updatedHeaders[ key.toLowerCase() ] = headers[ key ];
return updatedHeaders;
}, {} );
}
/**
* @classdesc Interact with the REST API. mw.Rest is a client library
* for the [REST API](https://www.mediawiki.org/wiki/Special:MyLanguage/API:REST_API).
* An mw.Rest object represents the REST API of a MediaWiki site.
* For the action API, see {@link mw.Api}.
*
* @example
* var api = new mw.Rest();
* api.get( '/v1/page/Main_Page/html' )
* .then( function ( data ) {
* console.log( data );
* } );
*
* api.post( '/v1/page/Main_Page', {
* token: 'anon_token',
* source: 'Lörem Ipsüm',
* comment: 'tästing',
* title: 'My_Page'
* }, {
* 'authorization': 'token'
* } )
* .then( function ( data ) {
* console.log( data );
* } );
*
* @constructor
* @description Create an instance of `mw.Rest`.
* @param {mw.Rest.Options} [options] See {@link mw.Rest.Options}
*/
mw.Rest = function ( options ) {
const defaults = Object.assign( {}, options );
defaults.ajax = Object.assign( {}, defaultOptions.ajax, defaults.ajax );
this.url = defaults.ajax.url;
delete defaults.ajax.url;
this.defaults = defaults;
this.requests = [];
};
mw.Rest.prototype = {
/**
* Abort all unfinished requests issued by this Api object.
*
* @method
*/
abort: function () {
this.requests.forEach( ( request ) => {
if ( request ) {
request.abort();
}
} );
},
/**
* Perform REST API get request.
*
* @method
* @param {string} path
* @param {Object} query
* @param {Object} [headers]
* @return {jQuery.Promise}
*/
get: function ( path, query, headers ) {
return this.ajax( path, {
type: 'GET',
data: query,
headers: headers || {}
} );
},
/**
* Perform REST API post request.
*
* Note: only sending application/json is currently supported.
*
* @method
* @param {string} path
* @param {Object} [body]
* @param {Object} [headers]
* @return {jQuery.Promise}
*/
post: function ( path, body, headers ) {
if ( body === undefined ) {
body = {};
}
headers = objectKeysToLowerCase( headers );
return this.ajax( path, {
type: 'POST',
headers: Object.assign( headers, { 'content-type': 'application/json' } ),
data: JSON.stringify( body )
} );
},
/**
* Perform REST API PUT request.
*
* Note: only sending `application/json` is currently supported.
*
* @method
* @param {string} path
* @param {Object} body
* @param {Object} [headers]
* @return {jQuery.Promise}
*/
put: function ( path, body, headers ) {
headers = objectKeysToLowerCase( headers );
return this.ajax( path, {
type: 'PUT',
headers: Object.assign( headers, { 'content-type': 'application/json' } ),
data: JSON.stringify( body )
} );
},
/**
* Perform REST API DELETE request.
*
* Note: only sending `application/json` is currently supported.
*
* @method
* @param {string} path
* @param {Object} body
* @param {Object} [headers]
* @return {jQuery.Promise}
*/
delete: function ( path, body, headers ) {
headers = objectKeysToLowerCase( headers );
return this.ajax( path, {
type: 'DELETE',
headers: Object.assign( headers, { 'content-type': 'application/json' } ),
data: JSON.stringify( body )
} );
},
/**
* Perform the API call.
*
* @method
* @param {string} path
* @param {Object} [ajaxOptions]
* @return {jQuery.Promise} Done: API response data and the jqXHR object.
* Fail: Error code
*/
ajax: function ( path, ajaxOptions ) {
const self = this,
apiDeferred = $.Deferred();
ajaxOptions = Object.assign( {}, this.defaults.ajax, ajaxOptions );
ajaxOptions.url = this.url + path;
// Make the AJAX request.
const xhr = $.ajax( ajaxOptions );
// Save it to make it possible to abort.
const requestIndex = this.requests.length;
this.requests.push( xhr );
xhr.always( () => {
self.requests[ requestIndex ] = null;
} );
xhr.then(
// AJAX success just means "200 OK" response.
( result, textStatus, jqXHR ) => {
apiDeferred.resolve( result, jqXHR );
},
// If AJAX fails, reject API call with error code 'http'
// and details in second argument.
( jqXHR, textStatus, exception ) => {
apiDeferred.reject( 'http', {
xhr: jqXHR,
textStatus: textStatus,
exception: exception
} );
}
);
// Return the Promise
return apiDeferred.promise( { abort: xhr.abort } );
}
};
}() );

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