WordPress/wp-includes/js/api-request.js

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/**
* Thin jQuery.ajax wrapper for WP REST API requests.
*
* Currently only applies to requests that do not use the `wp-api.js` Backbone
* client library, though this may change. Serves several purposes:
*
* - Allows overriding these requests as needed by customized WP installations.
* - Sends the REST API nonce as a request header.
* - Allows specifying only an endpoint namespace/path instead of a full URL.
*
* @since 4.9.0
*/
( function( $ ) {
var wpApiSettings = window.wpApiSettings;
function apiRequest( options ) {
options = apiRequest.buildAjaxOptions( options );
return apiRequest.transport( options );
}
apiRequest.buildAjaxOptions = function( options ) {
var url = options.url;
var path = options.path;
var namespaceTrimmed, endpointTrimmed, apiRoot;
var headers, addNonceHeader, headerName;
if (
typeof options.namespace === 'string' &&
typeof options.endpoint === 'string'
) {
namespaceTrimmed = options.namespace.replace( /^\/|\/$/g, '' );
endpointTrimmed = options.endpoint.replace( /^\//, '' );
if ( endpointTrimmed ) {
path = namespaceTrimmed + '/' + endpointTrimmed;
} else {
path = namespaceTrimmed;
}
}
if ( typeof path === 'string' ) {
apiRoot = wpApiSettings.root;
path = path.replace( /^\//, '' );
// API root may already include query parameter prefix if site is
// configured to use plain permalinks.
if ( 'string' === typeof apiRoot && -1 !== apiRoot.indexOf( '?' ) ) {
path = path.replace( '?', '&' );
}
url = apiRoot + path;
}
// If ?_wpnonce=... is present, no need to add a nonce header.
addNonceHeader = ! ( options.data && options.data._wpnonce );
headers = options.headers || {};
// If an 'X-WP-Nonce' header (or any case-insensitive variation
// thereof) was specified, no need to add a nonce header.
if ( addNonceHeader ) {
for ( headerName in headers ) {
if ( headers.hasOwnProperty( headerName ) ) {
if ( headerName.toLowerCase() === 'x-wp-nonce' ) {
addNonceHeader = false;
break;
}
}
}
}
if ( addNonceHeader ) {
// Do not mutate the original headers object, if any.
headers = $.extend( {
'X-WP-Nonce': wpApiSettings.nonce
}, headers );
}
// Do not mutate the original options object.
options = $.extend( {}, options, {
headers: headers,
url: url
} );
delete options.path;
delete options.namespace;
delete options.endpoint;
return options;
};
apiRequest.transport = $.ajax;
/** @namespace wp */
window.wp = window.wp || {};
window.wp.apiRequest = apiRequest;
} )( jQuery );