From f0462e3f0b777f38bc6c8049b5e4f9f4f231e6ef Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Sun, 24 May 2015 16:00:20 +0200
Subject: [PATCH] Added WoltLab/WCF/Ajax/Jsonp to issue JSONP requests

---
 .../files/js/WoltLab/WCF/Ajax/Jsonp.js        | 68 +++++++++++++++++++
 wcfsetup/install/files/js/require.config.js   |  1 +
 2 files changed, 69 insertions(+)
 create mode 100644 wcfsetup/install/files/js/WoltLab/WCF/Ajax/Jsonp.js

diff --git a/wcfsetup/install/files/js/WoltLab/WCF/Ajax/Jsonp.js b/wcfsetup/install/files/js/WoltLab/WCF/Ajax/Jsonp.js
new file mode 100644
index 0000000000..12a7de89ea
--- /dev/null
+++ b/wcfsetup/install/files/js/WoltLab/WCF/Ajax/Jsonp.js
@@ -0,0 +1,68 @@
+/**
+ * Provides a utility class to issue JSONP requests.
+ * 
+ * @author	Alexander Ebert
+ * @copyright	2001-2015 WoltLab GmbH
+ * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @module	WoltLab/WCF/Ajax/Jsonp
+ */
+define(['Core'], function(Core) {
+	"use strict";
+	
+	/**
+	 * @constructor
+	 */
+	function AjaxJsonp() {};
+	AjaxJsonp.prototype = {
+		/**
+		 * Issues a JSONP request.
+		 * 
+		 * @param	{string}		url		source URL, must not contain callback parameter
+		 * @param	{function}		success		success callback
+		 * @param	{function=}		failure		timeout callback
+		 * @param	{object<string, *>=}	options		request options
+		 */
+		send: function(url, success, failure, options) {
+			url = (typeof url === 'string') ? url.trim() : '';
+			if (url.length === 0) {
+				throw new Error("Expected a non-empty string for parameter 'url'.");
+			}
+			
+			if (typeof success !== 'function') {
+				throw new TypeError("Expected a valid callback function for parameter 'success'.");
+			}
+			
+			options = Core.extend({
+				parameterName: 'callback',
+				timeout: 10
+			}, options || {});
+			
+			var callbackName = 'wcf_jsonp_' + Core.getUuid().replace(/-/g, '').substr(0, 8);
+			
+			var timeout = window.setTimeout(function() {
+				window[callbackName] = function() {};
+				
+				if (typeof failure === 'function') {
+					failure();
+				}
+			}, (~~options.timeout || 10) * 1000);
+			
+			window[callbackName] = function() {
+				window.clearTimeout(timeout);
+				
+				success.apply(null, arguments);
+			};
+			
+			url += (url.indexOf('?') === -1) ? '?' : '&';
+			url += options.parameterName + '=' + callbackName;
+			
+			var script = document.createElement('script');
+			script.setAttribute('async', true);
+			script.setAttribute('src', url);
+			
+			document.head.appendChild(script);
+		}
+	};
+	
+	return new AjaxJsonp();
+});
diff --git a/wcfsetup/install/files/js/require.config.js b/wcfsetup/install/files/js/require.config.js
index e199597822..17a8071165 100644
--- a/wcfsetup/install/files/js/require.config.js
+++ b/wcfsetup/install/files/js/require.config.js
@@ -6,6 +6,7 @@ requirejs.config({
 	map: {
 		'*': {
 			'Ajax': 'WoltLab/WCF/Ajax',
+			'AjaxJsonp': 'WoltLab/WCF/Ajax/Jsonp',
 			'AjaxRequest': 'WoltLab/WCF/Ajax/Request',
 			'CallbackList': 'WoltLab/WCF/CallbackList',
 			'Core': 'WoltLab/WCF/Core',
-- 
2.20.1