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/*
YUI 3.17.2 (build 9c3c78e)
Copyright 2014 Yahoo! Inc. All rights reserved.
Licensed under the BSD License.
http://yuilibrary.com/license/
*/
YUI.add('jsonp-url', function (Y, NAME) {
var JSONPRequest = Y.JSONPRequest,
getByPath = Y.Object.getValue,
noop = function () {};
/**
* Adds support for parsing complex callback identifiers from the jsonp url.
* This includes callback=foo[1]bar.baz["goo"] as well as referencing methods
* in the YUI instance.
*
* @module jsonp
* @submodule jsonp-url
* @for JSONPRequest
*/
Y.mix(JSONPRequest.prototype, {
/**
* RegExp used by the default URL formatter to insert the generated callback
* name into the JSONP url. Looks for a query param callback=. If a value
* is assigned, it will be clobbered.
*
* @property _pattern
* @type RegExp
* @default /\bcallback=.*?(?=&|$)/i
* @protected
*/
_pattern: /\bcallback=(.*?)(?=&|$)/i,
/**
* Template used by the default URL formatter to add the callback function
* name to the url.
*
* @property _template
* @type String
* @default "callback={callback}"
* @protected
*/
_template: "callback={callback}",
/**
* <p>Parses the url for a callback named explicitly in the string.
* Override this if the target JSONP service uses a different query
* parameter or url format.</p>
*
* <p>If the callback is declared inline, the corresponding function will
* be returned. Otherwise null.</p>
*
* @method _defaultCallback
* @param url {String} the url to search in
* @return {Function} the callback function if found, or null
* @protected
*/
_defaultCallback: function (url) {
var match = url.match(this._pattern),
keys = [],
i = 0,
locator, path, callback;
if (match) {
// Strip the ["string keys"] and [1] array indexes
locator = match[1]
.replace(/\[(['"])(.*?)\1\]/g,
function (x, $1, $2) {
keys[i] = $2;
return '.@' + (i++);
})
.replace(/\[(\d+)\]/g,
function (x, $1) {
keys[i] = parseInt($1, 10) | 0;
return '.@' + (i++);
})
.replace(/^\./, ''); // remove leading dot
// Validate against problematic characters.
if (!/[^\w\.\$@]/.test(locator)) {
path = locator.split('.');
for (i = path.length - 1; i >= 0; --i) {
if (path[i].charAt(0) === '@') {
path[i] = keys[parseInt(path[i].substr(1), 10)];
}
}
// First look for a global function, then the Y, then try the Y
// again from the second token (to support "callback=Y.handler")
callback = getByPath(Y.config.win, path) ||
getByPath(Y, path) ||
getByPath(Y, path.slice(1));
}
}
return callback || noop;
},
/**
* URL formatter that looks for callback= in the url and appends it
* if not present. The supplied proxy name will be assigned to the query
* param. Override this method by passing a function as the
* "format" property in the config object to the constructor.
*
* @method _format
* @param url { String } the original url
* @param proxy {String} the function name that will be used as a proxy to
* the configured callback methods.
* @return {String} fully qualified JSONP url
* @protected
*/
_format: function (url, proxy) {
var callbackRE = /\{callback\}/,
callback, lastChar;
if (callbackRE.test(url)) {
return url.replace(callbackRE, proxy);
}
callback = this._template.replace(callbackRE, proxy);
if (this._pattern.test(url)) {
return url.replace(this._pattern, callback);
} else {
lastChar = url.slice(-1);
if (lastChar !== '&' && lastChar !== '?') {
url += (url.indexOf('?') > -1) ? '&' : '?';
}
return url + callback;
}
}
}, true);
}, '3.17.2', {"requires": ["jsonp"]});