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YUI.add('jsonp-url', function (Y, NAME) {
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var JSONPRequest = Y.JSONPRequest,
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getByPath = Y.Object.getValue,
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noop = function () {};
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/**
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* Adds support for parsing complex callback identifiers from the jsonp url.
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* This includes callback=foo[1]bar.baz["goo"] as well as referencing methods
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* in the YUI instance.
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*
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* @module jsonp
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* @submodule jsonp-url
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* @for JSONPRequest
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*/
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Y.mix(JSONPRequest.prototype, {
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/**
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* RegExp used by the default URL formatter to insert the generated callback
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* name into the JSONP url. Looks for a query param callback=. If a value
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* is assigned, it will be clobbered.
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*
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* @property _pattern
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* @type RegExp
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* @default /\bcallback=.*?(?=&|$)/i
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* @protected
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*/
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_pattern: /\bcallback=(.*?)(?=&|$)/i,
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/**
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* Template used by the default URL formatter to add the callback function
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* name to the url.
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*
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* @property _template
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* @type String
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* @default "callback={callback}"
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* @protected
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*/
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_template: "callback={callback}",
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/**
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* <p>Parses the url for a callback named explicitly in the string.
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* Override this if the target JSONP service uses a different query
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* parameter or url format.</p>
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*
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* <p>If the callback is declared inline, the corresponding function will
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* be returned. Otherwise null.</p>
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*
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* @method _defaultCallback
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* @param url {String} the url to search in
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* @return {Function} the callback function if found, or null
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* @protected
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*/
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_defaultCallback: function (url) {
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var match = url.match(this._pattern),
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keys = [],
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i = 0,
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locator, path, callback;
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if (match) {
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// Strip the ["string keys"] and [1] array indexes
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locator = match[1]
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.replace(/\[(['"])(.*?)\1\]/g,
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function (x, $1, $2) {
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keys[i] = $2;
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return '.@' + (i++);
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})
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.replace(/\[(\d+)\]/g,
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function (x, $1) {
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/*jslint bitwise: true */
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keys[i] = parseInt($1, 10) | 0;
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return '.@' + (i++);
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})
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.replace(/^\./, ''); // remove leading dot
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// Validate against problematic characters.
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if (!/[^\w\.\$@]/.test(locator)) {
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path = locator.split('.');
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for (i = path.length - 1; i >= 0; --i) {
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if (path[i].charAt(0) === '@') {
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path[i] = keys[parseInt(path[i].substr(1), 10)];
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}
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}
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// First look for a global function, then the Y, then try the Y
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// again from the second token (to support "callback=Y.handler")
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callback = getByPath(Y.config.win, path) ||
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getByPath(Y, path) ||
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getByPath(Y, path.slice(1));
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}
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}
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return callback || noop;
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},
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/**
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* URL formatter that looks for callback= in the url and appends it
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* if not present. The supplied proxy name will be assigned to the query
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* param. Override this method by passing a function as the
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* "format" property in the config object to the constructor.
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*
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* @method _format
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* @param url { String } the original url
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* @param proxy {String} the function name that will be used as a proxy to
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* the configured callback methods.
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* @return {String} fully qualified JSONP url
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* @protected
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*/
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_format: function (url, proxy) {
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var callbackRE = /\{callback\}/,
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callback, lastChar;
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if (callbackRE.test(url)) {
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return url.replace(callbackRE, proxy);
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}
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callback = this._template.replace(callbackRE, proxy);
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if (this._pattern.test(url)) {
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return url.replace(this._pattern, callback);
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} else {
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lastChar = url.slice(-1);
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if (lastChar !== '&' && lastChar !== '?') {
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url += (url.indexOf('?') > -1) ? '&' : '?';
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}
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return url + callback;
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}
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}
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}, true);
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}, '3.18.1', {"requires": ["jsonp"]});
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