631 lines
19 KiB
JavaScript
631 lines
19 KiB
JavaScript
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/*!
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* Reqwest! A general purpose XHR connection manager
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* license MIT (c) Dustin Diaz 2015
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* https://github.com/ded/reqwest
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*/
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!function (name, context, definition) {
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if (typeof module != 'undefined' && module.exports) module.exports = definition()
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else if (typeof define == 'function' && define.amd) define(definition)
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else context[name] = definition()
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}('reqwest', this, function () {
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var context = this
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if ('window' in context) {
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var doc = document
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, byTag = 'getElementsByTagName'
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, head = doc[byTag]('head')[0]
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} else {
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var XHR2
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try {
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XHR2 = require('xhr2')
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} catch (ex) {
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throw new Error('Peer dependency `xhr2` required! Please npm install xhr2')
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}
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}
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var httpsRe = /^http/
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, protocolRe = /(^\w+):\/\//
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, twoHundo = /^(20\d|1223)$/ //http://stackoverflow.com/questions/10046972/msie-returns-status-code-of-1223-for-ajax-request
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, readyState = 'readyState'
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, contentType = 'Content-Type'
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, requestedWith = 'X-Requested-With'
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, uniqid = 0
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, callbackPrefix = 'reqwest_' + (+new Date())
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, lastValue // data stored by the most recent JSONP callback
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, xmlHttpRequest = 'XMLHttpRequest'
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, xDomainRequest = 'XDomainRequest'
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, noop = function () {}
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, isArray = typeof Array.isArray == 'function'
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? Array.isArray
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: function (a) {
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return a instanceof Array
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}
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, defaultHeaders = {
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'contentType': 'application/x-www-form-urlencoded'
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, 'requestedWith': xmlHttpRequest
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, 'accept': {
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'*': 'text/javascript, text/html, application/xml, text/xml, */*'
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, 'xml': 'application/xml, text/xml'
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, 'html': 'text/html'
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, 'text': 'text/plain'
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, 'json': 'application/json, text/javascript'
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, 'js': 'application/javascript, text/javascript'
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}
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}
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, xhr = function(o) {
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// is it x-domain
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if (o['crossOrigin'] === true) {
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var xhr = context[xmlHttpRequest] ? new XMLHttpRequest() : null
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if (xhr && 'withCredentials' in xhr) {
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return xhr
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} else if (context[xDomainRequest]) {
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return new XDomainRequest()
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} else {
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throw new Error('Browser does not support cross-origin requests')
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}
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} else if (context[xmlHttpRequest]) {
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return new XMLHttpRequest()
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} else if (XHR2) {
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return new XHR2()
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} else {
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return new ActiveXObject('Microsoft.XMLHTTP')
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}
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}
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, globalSetupOptions = {
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dataFilter: function (data) {
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return data
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}
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}
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function succeed(r) {
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var protocol = protocolRe.exec(r.url)
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protocol = (protocol && protocol[1]) || context.location.protocol
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return httpsRe.test(protocol) ? twoHundo.test(r.request.status) : !!r.request.response
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}
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function handleReadyState(r, success, error) {
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return function () {
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// use _aborted to mitigate against IE err c00c023f
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// (can't read props on aborted request objects)
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if (r._aborted) return error(r.request)
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if (r._timedOut) return error(r.request, 'Request is aborted: timeout')
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if (r.request && r.request[readyState] == 4) {
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r.request.onreadystatechange = noop
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if (succeed(r)) success(r.request)
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else
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error(r.request)
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}
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}
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}
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function setHeaders(http, o) {
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var headers = o['headers'] || {}
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, h
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headers['Accept'] = headers['Accept']
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|| defaultHeaders['accept'][o['type']]
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|| defaultHeaders['accept']['*']
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var isAFormData = typeof FormData !== 'undefined' && (o['data'] instanceof FormData);
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// breaks cross-origin requests with legacy browsers
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if (!o['crossOrigin'] && !headers[requestedWith]) headers[requestedWith] = defaultHeaders['requestedWith']
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if (!headers[contentType] && !isAFormData) headers[contentType] = o['contentType'] || defaultHeaders['contentType']
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for (h in headers)
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headers.hasOwnProperty(h) && 'setRequestHeader' in http && http.setRequestHeader(h, headers[h])
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}
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function setCredentials(http, o) {
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if (typeof o['withCredentials'] !== 'undefined' && typeof http.withCredentials !== 'undefined') {
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http.withCredentials = !!o['withCredentials']
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}
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}
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function generalCallback(data) {
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lastValue = data
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}
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function urlappend (url, s) {
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return url + (/\?/.test(url) ? '&' : '?') + s
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}
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function handleJsonp(o, fn, err, url) {
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var reqId = uniqid++
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, cbkey = o['jsonpCallback'] || 'callback' // the 'callback' key
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, cbval = o['jsonpCallbackName'] || reqwest.getcallbackPrefix(reqId)
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, cbreg = new RegExp('((^|\\?|&)' + cbkey + ')=([^&]+)')
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, match = url.match(cbreg)
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, script = doc.createElement('script')
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, loaded = 0
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, isIE10 = navigator.userAgent.indexOf('MSIE 10.0') !== -1
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if (match) {
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if (match[3] === '?') {
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url = url.replace(cbreg, '$1=' + cbval) // wildcard callback func name
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} else {
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cbval = match[3] // provided callback func name
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}
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} else {
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url = urlappend(url, cbkey + '=' + cbval) // no callback details, add 'em
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}
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context[cbval] = generalCallback
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script.type = 'text/javascript'
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script.src = url
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script.async = true
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if (typeof script.onreadystatechange !== 'undefined' && !isIE10) {
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// need this for IE due to out-of-order onreadystatechange(), binding script
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// execution to an event listener gives us control over when the script
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// is executed. See http://jaubourg.net/2010/07/loading-script-as-onclick-handler-of.html
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script.htmlFor = script.id = '_reqwest_' + reqId
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}
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script.onload = script.onreadystatechange = function () {
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if ((script[readyState] && script[readyState] !== 'complete' && script[readyState] !== 'loaded') || loaded) {
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return false
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}
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script.onload = script.onreadystatechange = null
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script.onclick && script.onclick()
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// Call the user callback with the last value stored and clean up values and scripts.
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fn(lastValue)
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lastValue = undefined
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head.removeChild(script)
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loaded = 1
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}
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// Add the script to the DOM head
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head.appendChild(script)
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// Enable JSONP timeout
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return {
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abort: function () {
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script.onload = script.onreadystatechange = null
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err({}, 'Request is aborted: timeout', {})
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lastValue = undefined
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head.removeChild(script)
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loaded = 1
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}
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}
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}
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function getRequest(fn, err) {
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var o = this.o
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, method = (o['method'] || 'GET').toUpperCase()
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, url = typeof o === 'string' ? o : o['url']
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// convert non-string objects to query-string form unless o['processData'] is false
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, data = (o['processData'] !== false && o['data'] && typeof o['data'] !== 'string')
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? reqwest.toQueryString(o['data'])
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: (o['data'] || null)
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, http
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, sendWait = false
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// if we're working on a GET request and we have data then we should append
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// query string to end of URL and not post data
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if ((o['type'] == 'jsonp' || method == 'GET') && data) {
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url = urlappend(url, data)
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data = null
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}
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if (o['type'] == 'jsonp') return handleJsonp(o, fn, err, url)
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// get the xhr from the factory if passed
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// if the factory returns null, fall-back to ours
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http = (o.xhr && o.xhr(o)) || xhr(o)
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http.open(method, url, o['async'] === false ? false : true)
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setHeaders(http, o)
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setCredentials(http, o)
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if (context[xDomainRequest] && http instanceof context[xDomainRequest]) {
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http.onload = fn
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http.onerror = err
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// NOTE: see
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// http://social.msdn.microsoft.com/Forums/en-US/iewebdevelopment/thread/30ef3add-767c-4436-b8a9-f1ca19b4812e
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http.onprogress = function() {}
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sendWait = true
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} else {
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http.onreadystatechange = handleReadyState(this, fn, err)
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}
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o['before'] && o['before'](http)
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if (sendWait) {
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setTimeout(function () {
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http.send(data)
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}, 200)
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} else {
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http.send(data)
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}
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return http
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}
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function Reqwest(o, fn) {
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this.o = o
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this.fn = fn
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init.apply(this, arguments)
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}
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function setType(header) {
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// json, javascript, text/plain, text/html, xml
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if (header === null) return undefined; //In case of no content-type.
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if (header.match('json')) return 'json'
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if (header.match('javascript')) return 'js'
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if (header.match('text')) return 'html'
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if (header.match('xml')) return 'xml'
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}
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function init(o, fn) {
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this.url = typeof o == 'string' ? o : o['url']
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this.timeout = null
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// whether request has been fulfilled for purpose
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// of tracking the Promises
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this._fulfilled = false
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// success handlers
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this._successHandler = function(){}
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this._fulfillmentHandlers = []
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// error handlers
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this._errorHandlers = []
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// complete (both success and fail) handlers
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this._completeHandlers = []
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this._erred = false
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this._responseArgs = {}
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var self = this
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fn = fn || function () {}
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if (o['timeout']) {
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this.timeout = setTimeout(function () {
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timedOut()
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}, o['timeout'])
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}
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if (o['success']) {
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this._successHandler = function () {
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o['success'].apply(o, arguments)
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}
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}
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if (o['error']) {
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this._errorHandlers.push(function () {
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o['error'].apply(o, arguments)
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})
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}
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if (o['complete']) {
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this._completeHandlers.push(function () {
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o['complete'].apply(o, arguments)
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})
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}
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function complete (resp) {
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o['timeout'] && clearTimeout(self.timeout)
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self.timeout = null
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while (self._completeHandlers.length > 0) {
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self._completeHandlers.shift()(resp)
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}
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}
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function success (resp) {
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var type = o['type'] || resp && setType(resp.getResponseHeader('Content-Type')) // resp can be undefined in IE
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resp = (type !== 'jsonp') ? self.request : resp
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// use global data filter on response text
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var filteredResponse = globalSetupOptions.dataFilter(resp.responseText, type)
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, r = filteredResponse
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try {
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resp.responseText = r
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} catch (e) {
|
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// can't assign this in IE<=8, just ignore
|
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}
|
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if (r) {
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switch (type) {
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case 'json':
|
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try {
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resp = context.JSON ? context.JSON.parse(r) : eval('(' + r + ')')
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} catch (err) {
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return error(resp, 'Could not parse JSON in response', err)
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}
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break
|
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case 'js':
|
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resp = eval(r)
|
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break
|
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case 'html':
|
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resp = r
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break
|
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case 'xml':
|
||
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resp = resp.responseXML
|
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&& resp.responseXML.parseError // IE trololo
|
||
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&& resp.responseXML.parseError.errorCode
|
||
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&& resp.responseXML.parseError.reason
|
||
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? null
|
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: resp.responseXML
|
||
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break
|
||
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}
|
||
|
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}
|
||
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|
||
|
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self._responseArgs.resp = resp
|
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self._fulfilled = true
|
||
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fn(resp)
|
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self._successHandler(resp)
|
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while (self._fulfillmentHandlers.length > 0) {
|
||
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resp = self._fulfillmentHandlers.shift()(resp)
|
||
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}
|
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complete(resp)
|
||
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}
|
||
|
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|
||
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function timedOut() {
|
||
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self._timedOut = true
|
||
|
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self.request.abort()
|
||
|
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}
|
||
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|
||
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function error(resp, msg, t) {
|
||
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resp = self.request
|
||
|
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self._responseArgs.resp = resp
|
||
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self._responseArgs.msg = msg
|
||
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self._responseArgs.t = t
|
||
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self._erred = true
|
||
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while (self._errorHandlers.length > 0) {
|
||
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self._errorHandlers.shift()(resp, msg, t)
|
||
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}
|
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complete(resp)
|
||
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}
|
||
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|
||
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this.request = getRequest.call(this, success, error)
|
||
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}
|
||
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||
|
|
Reqwest.prototype = {
|
||
|
|
abort: function () {
|
||
|
|
this._aborted = true
|
||
|
|
this.request.abort()
|
||
|
|
}
|
||
|
|
|
||
|
|
, retry: function () {
|
||
|
|
init.call(this, this.o, this.fn)
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Small deviation from the Promises A CommonJs specification
|
||
|
|
* http://wiki.commonjs.org/wiki/Promises/A
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* `then` will execute upon successful requests
|
||
|
|
*/
|
||
|
|
, then: function (success, fail) {
|
||
|
|
success = success || function () {}
|
||
|
|
fail = fail || function () {}
|
||
|
|
if (this._fulfilled) {
|
||
|
|
this._responseArgs.resp = success(this._responseArgs.resp)
|
||
|
|
} else if (this._erred) {
|
||
|
|
fail(this._responseArgs.resp, this._responseArgs.msg, this._responseArgs.t)
|
||
|
|
} else {
|
||
|
|
this._fulfillmentHandlers.push(success)
|
||
|
|
this._errorHandlers.push(fail)
|
||
|
|
}
|
||
|
|
return this
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* `always` will execute whether the request succeeds or fails
|
||
|
|
*/
|
||
|
|
, always: function (fn) {
|
||
|
|
if (this._fulfilled || this._erred) {
|
||
|
|
fn(this._responseArgs.resp)
|
||
|
|
} else {
|
||
|
|
this._completeHandlers.push(fn)
|
||
|
|
}
|
||
|
|
return this
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* `fail` will execute when the request fails
|
||
|
|
*/
|
||
|
|
, fail: function (fn) {
|
||
|
|
if (this._erred) {
|
||
|
|
fn(this._responseArgs.resp, this._responseArgs.msg, this._responseArgs.t)
|
||
|
|
} else {
|
||
|
|
this._errorHandlers.push(fn)
|
||
|
|
}
|
||
|
|
return this
|
||
|
|
}
|
||
|
|
, 'catch': function (fn) {
|
||
|
|
return this.fail(fn)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function reqwest(o, fn) {
|
||
|
|
return new Reqwest(o, fn)
|
||
|
|
}
|
||
|
|
|
||
|
|
// normalize newline variants according to spec -> CRLF
|
||
|
|
function normalize(s) {
|
||
|
|
return s ? s.replace(/\r?\n/g, '\r\n') : ''
|
||
|
|
}
|
||
|
|
|
||
|
|
function serial(el, cb) {
|
||
|
|
var n = el.name
|
||
|
|
, t = el.tagName.toLowerCase()
|
||
|
|
, optCb = function (o) {
|
||
|
|
// IE gives value="" even where there is no value attribute
|
||
|
|
// 'specified' ref: http://www.w3.org/TR/DOM-Level-3-Core/core.html#ID-862529273
|
||
|
|
if (o && !o['disabled'])
|
||
|
|
cb(n, normalize(o['attributes']['value'] && o['attributes']['value']['specified'] ? o['value'] : o['text']))
|
||
|
|
}
|
||
|
|
, ch, ra, val, i
|
||
|
|
|
||
|
|
// don't serialize elements that are disabled or without a name
|
||
|
|
if (el.disabled || !n) return
|
||
|
|
|
||
|
|
switch (t) {
|
||
|
|
case 'input':
|
||
|
|
if (!/reset|button|image|file/i.test(el.type)) {
|
||
|
|
ch = /checkbox/i.test(el.type)
|
||
|
|
ra = /radio/i.test(el.type)
|
||
|
|
val = el.value
|
||
|
|
// WebKit gives us "" instead of "on" if a checkbox has no value, so correct it here
|
||
|
|
;(!(ch || ra) || el.checked) && cb(n, normalize(ch && val === '' ? 'on' : val))
|
||
|
|
}
|
||
|
|
break
|
||
|
|
case 'textarea':
|
||
|
|
cb(n, normalize(el.value))
|
||
|
|
break
|
||
|
|
case 'select':
|
||
|
|
if (el.type.toLowerCase() === 'select-one') {
|
||
|
|
optCb(el.selectedIndex >= 0 ? el.options[el.selectedIndex] : null)
|
||
|
|
} else {
|
||
|
|
for (i = 0; el.length && i < el.length; i++) {
|
||
|
|
el.options[i].selected && optCb(el.options[i])
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// collect up all form elements found from the passed argument elements all
|
||
|
|
// the way down to child elements; pass a '<form>' or form fields.
|
||
|
|
// called with 'this'=callback to use for serial() on each element
|
||
|
|
function eachFormElement() {
|
||
|
|
var cb = this
|
||
|
|
, e, i
|
||
|
|
, serializeSubtags = function (e, tags) {
|
||
|
|
var i, j, fa
|
||
|
|
for (i = 0; i < tags.length; i++) {
|
||
|
|
fa = e[byTag](tags[i])
|
||
|
|
for (j = 0; j < fa.length; j++) serial(fa[j], cb)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < arguments.length; i++) {
|
||
|
|
e = arguments[i]
|
||
|
|
if (/input|select|textarea/i.test(e.tagName)) serial(e, cb)
|
||
|
|
serializeSubtags(e, [ 'input', 'select', 'textarea' ])
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// standard query string style serialization
|
||
|
|
function serializeQueryString() {
|
||
|
|
return reqwest.toQueryString(reqwest.serializeArray.apply(null, arguments))
|
||
|
|
}
|
||
|
|
|
||
|
|
// { 'name': 'value', ... } style serialization
|
||
|
|
function serializeHash() {
|
||
|
|
var hash = {}
|
||
|
|
eachFormElement.apply(function (name, value) {
|
||
|
|
if (name in hash) {
|
||
|
|
hash[name] && !isArray(hash[name]) && (hash[name] = [hash[name]])
|
||
|
|
hash[name].push(value)
|
||
|
|
} else hash[name] = value
|
||
|
|
}, arguments)
|
||
|
|
return hash
|
||
|
|
}
|
||
|
|
|
||
|
|
// [ { name: 'name', value: 'value' }, ... ] style serialization
|
||
|
|
reqwest.serializeArray = function () {
|
||
|
|
var arr = []
|
||
|
|
eachFormElement.apply(function (name, value) {
|
||
|
|
arr.push({name: name, value: value})
|
||
|
|
}, arguments)
|
||
|
|
return arr
|
||
|
|
}
|
||
|
|
|
||
|
|
reqwest.serialize = function () {
|
||
|
|
if (arguments.length === 0) return ''
|
||
|
|
var opt, fn
|
||
|
|
, args = Array.prototype.slice.call(arguments, 0)
|
||
|
|
|
||
|
|
opt = args.pop()
|
||
|
|
opt && opt.nodeType && args.push(opt) && (opt = null)
|
||
|
|
opt && (opt = opt.type)
|
||
|
|
|
||
|
|
if (opt == 'map') fn = serializeHash
|
||
|
|
else if (opt == 'array') fn = reqwest.serializeArray
|
||
|
|
else fn = serializeQueryString
|
||
|
|
|
||
|
|
return fn.apply(null, args)
|
||
|
|
}
|
||
|
|
|
||
|
|
reqwest.toQueryString = function (o, trad) {
|
||
|
|
var prefix, i
|
||
|
|
, traditional = trad || false
|
||
|
|
, s = []
|
||
|
|
, enc = encodeURIComponent
|
||
|
|
, add = function (key, value) {
|
||
|
|
// If value is a function, invoke it and return its value
|
||
|
|
value = ('function' === typeof value) ? value() : (value == null ? '' : value)
|
||
|
|
s[s.length] = enc(key) + '=' + enc(value)
|
||
|
|
}
|
||
|
|
// If an array was passed in, assume that it is an array of form elements.
|
||
|
|
if (isArray(o)) {
|
||
|
|
for (i = 0; o && i < o.length; i++) add(o[i]['name'], o[i]['value'])
|
||
|
|
} else {
|
||
|
|
// If traditional, encode the "old" way (the way 1.3.2 or older
|
||
|
|
// did it), otherwise encode params recursively.
|
||
|
|
for (prefix in o) {
|
||
|
|
if (o.hasOwnProperty(prefix)) buildParams(prefix, o[prefix], traditional, add)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// spaces should be + according to spec
|
||
|
|
return s.join('&').replace(/%20/g, '+')
|
||
|
|
}
|
||
|
|
|
||
|
|
function buildParams(prefix, obj, traditional, add) {
|
||
|
|
var name, i, v
|
||
|
|
, rbracket = /\[\]$/
|
||
|
|
|
||
|
|
if (isArray(obj)) {
|
||
|
|
// Serialize array item.
|
||
|
|
for (i = 0; obj && i < obj.length; i++) {
|
||
|
|
v = obj[i]
|
||
|
|
if (traditional || rbracket.test(prefix)) {
|
||
|
|
// Treat each array item as a scalar.
|
||
|
|
add(prefix, v)
|
||
|
|
} else {
|
||
|
|
buildParams(prefix + '[' + (typeof v === 'object' ? i : '') + ']', v, traditional, add)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else if (obj && obj.toString() === '[object Object]') {
|
||
|
|
// Serialize object item.
|
||
|
|
for (name in obj) {
|
||
|
|
buildParams(prefix + '[' + name + ']', obj[name], traditional, add)
|
||
|
|
}
|
||
|
|
|
||
|
|
} else {
|
||
|
|
// Serialize scalar item.
|
||
|
|
add(prefix, obj)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
reqwest.getcallbackPrefix = function () {
|
||
|
|
return callbackPrefix
|
||
|
|
}
|
||
|
|
|
||
|
|
// jQuery and Zepto compatibility, differences can be remapped here so you can call
|
||
|
|
// .ajax.compat(options, callback)
|
||
|
|
reqwest.compat = function (o, fn) {
|
||
|
|
if (o) {
|
||
|
|
o['type'] && (o['method'] = o['type']) && delete o['type']
|
||
|
|
o['dataType'] && (o['type'] = o['dataType'])
|
||
|
|
o['jsonpCallback'] && (o['jsonpCallbackName'] = o['jsonpCallback']) && delete o['jsonpCallback']
|
||
|
|
o['jsonp'] && (o['jsonpCallback'] = o['jsonp'])
|
||
|
|
}
|
||
|
|
return new Reqwest(o, fn)
|
||
|
|
}
|
||
|
|
|
||
|
|
reqwest.ajaxSetup = function (options) {
|
||
|
|
options = options || {}
|
||
|
|
for (var k in options) {
|
||
|
|
globalSetupOptions[k] = options[k]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return reqwest
|
||
|
|
});
|