/ajax/libs/reqwest/0.1.4/reqwest.js
JavaScript | 252 lines | 28 code | 3 blank | 221 comment | 6 complexity | 5370737a245d6df86ce607cdffbcf56c MD5 | raw file
- /*!
- * Reqwest! A x-browser general purpose XHR connection manager
- * copyright Dustin Diaz 2011
- * https://github.com/ded/reqwest
- * license MIT
- */
- !function (window) {
- var twoHundo = /^20\d$/,
- doc = document,
- byTag = 'getElementsByTagName',
- head = doc[byTag]('head')[0],
- xhr = ('XMLHttpRequest' in window) ?
- function () {
- return new XMLHttpRequest();
- } :
- function () {
- return new ActiveXObject('Microsoft.XMLHTTP');
- };
- var uniqid = 0;
- // data stored by the most recent JSONP callback
- var lastValue;
- function readyState(o, success, error) {
- return function () {
- if (o && o.readyState == 4) {
- if (twoHundo.test(o.status)) {
- success(o);
- } else {
- error(o);
- }
- }
- };
- }
- function setHeaders(http, options) {
- var headers = options.headers || {};
- headers.Accept = 'text/javascript, text/html, application/xml, text/xml, */*';
- headers['X-Requested-With'] = headers['X-Requested-With'] || 'XMLHttpRequest';
- if (options.data) {
- headers['Content-type'] = 'application/x-www-form-urlencoded';
- for (var h in headers) {
- headers.hasOwnProperty(h) && http.setRequestHeader(h, headers[h], false);
- }
- }
- }
- function getCallbackName(o) {
- var callbackVar = o.jsonpCallback || "callback";
- if (o.url.slice(-(callbackVar.length + 2)) == (callbackVar + "=?")) {
- // Generate a guaranteed unique callback name
- var callbackName = "reqwest_" + uniqid++;
- // Replace the ? in the URL with the generated name
- o.url = o.url.substr(0, o.url.length - 1) + callbackName;
- return callbackName;
- } else {
- // Find the supplied callback name
- var regex = new RegExp(callbackVar + "=([\\w]+)");
- return o.url.match(regex)[1];
- }
- }
- // Store the data returned by the most recent callback
- function generalCallback(data) {
- lastValue = data;
- }
- function getRequest(o, fn, err) {
- if (o.type == 'jsonp') {
- var script = doc.createElement('script');
- // Add the global callback
- var callbackName = getCallbackName(o);
- window[callbackName] = generalCallback;
- // Setup our script element
- script.type = "text/javascript";
- script.src = o.url;
- script.async = true;
- script.onload = function () {
- // Call the user callback with the last value stored
- // and clean up values and scripts.
- o.success && o.success(lastValue);
- lastValue = undefined;
- head.removeChild(script);
- };
- // Add the script to the DOM head
- head.appendChild(script);
- } else {
- var http = xhr();
- http.open(o.method || 'GET', typeof o == 'string' ? o : o.url, true);
- setHeaders(http, o);
- http.onreadystatechange = readyState(http, fn, err);
- o.before && o.before(http);
- http.send(o.data || null);
- return http;
- }
- }
- function Reqwest(o, fn) {
- this.o = o;
- this.fn = fn;
- init.apply(this, arguments);
- }
- function setType(url) {
- if (/\.json$/.test(url)) {
- return 'json';
- }
- if (/\.jsonp$/.test(url)) {
- return 'jsonp';
- }
- if (/\.js$/.test(url)) {
- return 'js';
- }
- if (/\.html?$/.test(url)) {
- return 'html';
- }
- if (/\.xml$/.test(url)) {
- return 'xml';
- }
- return 'js';
- }
- function init(o, fn) {
- this.url = typeof o == 'string' ? o : o.url;
- this.timeout = null;
- var type = o.type || setType(this.url), self = this;
- fn = fn || function () {};
- if (o.timeout) {
- this.timeout = setTimeout(function () {
- self.abort();
- error();
- }, o.timeout);
- }
- function complete(resp) {
- o.complete && o.complete(resp);
- }
- function success(resp) {
- o.timeout && clearTimeout(self.timeout) && (self.timeout = null);
- var r = resp.responseText;
- switch (type) {
- case 'json':
- resp = eval('(' + r + ')');
- break;
- case 'js':
- resp = eval(r);
- break;
- case 'html':
- resp = r;
- break;
- // default is the response from server
- }
- fn(resp);
- o.success && o.success(resp);
- complete(resp);
- }
- function error(resp) {
- o.error && o.error(resp);
- complete(resp);
- }
- this.request = getRequest(o, success, error);
- }
- Reqwest.prototype = {
- abort: function () {
- this.request.abort();
- },
- retry: function () {
- init.call(this, this.o, this.fn);
- }
- };
- function reqwest(o, fn) {
- return new Reqwest(o, fn);
- }
- function enc(v) {
- return encodeURIComponent(v);
- }
- function serial(el) {
- var n = el.name;
- // don't serialize elements that are disabled or without a name
- if (el.disabled || !n) {
- return '';
- }
- n = enc(n);
- switch (el.tagName.toLowerCase()) {
- case 'input':
- switch (el.type) {
- // silly wabbit
- case 'reset':
- case 'button':
- case 'image':
- case 'file':
- return '';
- case 'checkbox':
- case 'radio':
- return el.checked ? n + '=' + (el.value ? enc(el.value) : true) + '&' : '';
- default: // text hidden password submit
- return n + '=' + (el.value ? enc(el.value) : true) + '&';
- }
- break;
- case 'textarea':
- return n + '=' + enc(el.value) + '&';
- case 'select':
- // @todo refactor beyond basic single selected value case
- return n + '=' + enc(el.options[el.selectedIndex].value) + '&';
- }
- return '';
- }
- reqwest.serialize = function (form) {
- var inputs = form[byTag]('input'),
- selects = form[byTag]('select'),
- texts = form[byTag]('textarea');
- return (v(inputs).chain().toArray().map(serial).value().join('') +
- v(selects).chain().toArray().map(serial).value().join('') +
- v(texts).chain().toArray().map(serial).value().join('')).replace(/&$/, '');
- };
- reqwest.serializeArray = function (f) {
- for (var pairs = this.serialize(f).split('&'), i = 0, l = pairs.length, r = [], o; i < l; i++) {
- pairs[i] && (o = pairs[i].split('=')) && r.push({name: o[0], value: o[1]});
- }
- return r;
- };
- var old = window.reqwest;
- reqwest.noConflict = function () {
- window.reqwest = old;
- return this;
- };
- // defined as extern for Closure Compilation
- // do not change to (dot) '.' syntax
- window['reqwest'] = reqwest;
- }(this);