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msd2/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
+ * @output wp-includes/js/api-request.js
+ */
+
+( 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 );