740 lines
23 KiB
JavaScript
740 lines
23 KiB
JavaScript
/**
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* Request组件, modern版, 支持IE9+,chrome,FF
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* @authors yutent (yutent@doui.cc)
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* @date 2016-11-27 13:08:40
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*
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*/
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"use strict";
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define(function(){
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var _request = function(url, protocol){
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this.transport = true
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protocol = (protocol + '').trim().toUpperCase()
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this.xhr = Xhr()
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this.opt = {
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url: (url + '').trim(),
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type: protocol || 'GET',
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form: '',
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headers: {},
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timeoutID: 0,
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uuid: Math.random().toString(16).substr(2)
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}
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},
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_requestp = _request.prototype,
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toS = Object.prototype.toString,
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win = window,
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doc = win.document,
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encode = encodeURIComponent,
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decode = decodeURIComponent,
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noop = function(e, res){
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if(e)
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throw new Error(e + '')
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};
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// -----------------------------
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// 本地协议判断正则
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var rlocalProtocol = /^(?:about|app|app-storage|.+-extension|file|res|widget):$/
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var isLocal = false
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try{
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isLocal = rlocalProtocol.test(location.protocol)
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}catch(e){}
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var rheaders = /^(.*?):[ \t]*([^\r\n]*)\r?$/mg
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// ----------------- 一些兼容性预处理 --------------------
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win.Xhr = function(){
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return new XMLHttpRequest()
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}
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// var supportCors = 'withCredentials' in Xhr()
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// ------------------- 几个解释方法 -----------------------
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var Format = function(){
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this.tagHooks = new function(){
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this.option = doc.createElement('select')
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this.thead = doc.createElement('table')
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this.td = doc.createElement('tr')
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this.area = doc.createElement('map')
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this.tr = doc.createElement('tbody')
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this.col = doc.createElement('colgroup')
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this.legend = doc.createElement('fieldset')
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this._default = doc.createElement('div')
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this.g = doc.createElementNS('http://www.w3.org/2000/svg', 'svg')
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this.optgroup = this.option
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this.tbody = this.tfoot = this.colgroup = this.caption = this.thead
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this.th = this.td
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};
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var _this = this
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'circle,defs,ellipse,image,line,path,polygon,polyline,rect,symbol,text,use'.replace(/,/g, function(m){
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_this.tagHooks[m] = _this.tagHooks.g //处理svg
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})
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this.rtagName = /<([\w:]+)/
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this.rxhtml = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([\w:]+)[^>]*)\/>/ig
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this.scriptTypes = {
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'text/javascript': 1,
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'text/ecmascript': 1,
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'application/ecmascript': 1,
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'application/javascript': 1
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}
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this.rhtml = /<|&#?\w+;/
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}
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function serialize(p, obj, q){
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var k
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if(Array.isArray(obj)){
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obj.forEach(function(it, i){
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k = p ? (p + '[' + (Array.isArray(it) ? i : '') + ']') : i
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if(typeof it === 'object'){
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serialize(k, it, q)
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}else{
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q(k, it)
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}
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})
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}else{
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for(var i in obj){
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k = p ? (p + '[' + i + ']') : i
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if(typeof obj[i] === 'object'){
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serialize(k, obj[i], q)
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}else{
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q(k, obj[i])
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}
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}
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}
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}
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Format.prototype = {
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parseJS: function(code){
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code = (code + '').trim()
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if(code){
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if(code.indexOf('use strict') === 1){
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var script = doc.createElement('script')
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script.text = code
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doc.head
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.appendChild(script)
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.parentNode
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.removeChild(script)
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}else{
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eval(code)
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}
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}
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},
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parseXML: function(data, xml, tmp){
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try{
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tmp = new DOMParser();
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xml = tmp.parseFromString(data, 'text/xml');
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}catch(e){
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xml = void 0;
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}
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if(!xml ||
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!xml.documentElement ||
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xml.getElementsByTagName('parsererror').length){
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console.error('Invalid XML: ' + data)
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}
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return xml
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},
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parseHTML: function (html){
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var fragment = (doc.createDocumentFragment()).cloneNode(false)
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if(typeof html !== 'string')
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return fragment
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if(!this.rhtml.test(html)){
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fragment.appendChild(document.createTextNode(html))
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return fragment
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}
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html = html.replace(this.rxhtml, '<$1></$2>').trim()
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var tag = (this.rtagName.exec(html) || ['', ''])[1].toLowerCase()
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var wrap = this.tagHooks[tag] || this.tagHooks._default
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var firstChild = null
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//使用innerHTML生成的script节点不会触发请求与执行text属性
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wrap.innerHTML = html
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var script = wrap.getElementsByTagName('script')
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if(script.length){
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for(var i = 0, el; el = script[i++];){
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if(this.scriptTypes[el.type]){
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var tmp = (doc.createElement("script")).cloneNode(false)
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el.attributes.forEach(function(attr){
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tmp.setAttribute(attr.name, attr.value)
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})
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tmp.text = el.text
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el.parentNode.replaceChild(tmp, el)
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}
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}
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}
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while(firstChild = wrap.firstChild){
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fragment.appendChild(firstChild)
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}
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return fragment
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},
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param: function(obj){
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if(!obj || typeof obj === 'string' || typeof obj === 'number')
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return obj
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var arr = []
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var q = function(k, v){
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if(/native code/.test(v))
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return
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v = (typeof v === 'function') ? v() : v
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v = (toS.call(v) !== '[object File]') ? encode(v) : v
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arr.push(encode(k) + '=' + v)
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}
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if(typeof obj === 'object')
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serialize('', obj, q)
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return arr.join('&')
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},
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parseForm: function(form){
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var data = {}
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for(var i = 0,field; field = form.elements[i++];){
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switch(field.type){
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case 'select-one':
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case 'select-multiple':
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if(field.name.length && !field.disabled){
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for(var j = 0, opt;opt = field.options[j++];){
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if(opt.selected){
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data[field.name] = opt.value || opt.text
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}
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}
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}
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break;
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case 'file':
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if(field.name.length && !field.disabled){
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data[field.name] = field.files[0]
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}
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break;
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case undefined:
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case 'submit':
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case 'reset':
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case 'button':
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break; //按钮啥的, 直接忽略
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case 'radio':
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case 'checkbox':
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// 只处理选中的
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if(!field.checked)
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break;
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default:
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if(field.name.length && !field.disabled){
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data[field.name] = field.value
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}
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}
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}
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return data
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},
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merge: function(a, b){
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if(typeof a !== 'object' || typeof b !== 'object')
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throw new TypeError('argument must be an object')
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if(Object.assign)
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return Object.assign(a, b)
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for(var i in b){
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a[i] = b[i]
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}
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return a
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}
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}
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var F = new Format()
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// ---------------------------------------------------------
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// -------------------- request 模块开始 --------------------
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// ---------------------------------------------------------
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var requestConvert = {
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text: function(val){
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return val
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},
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xml: function(val, xml){
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return xml !== undefined ? xml : F.parseXML(val)
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},
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html: function(val){
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return F.parseHTML(val)
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},
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json: function(val){
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return JSON.parse(val)
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},
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script: function(val){
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return F.parseJS(val)
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},
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jsonp: function(name){
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var json = request.cache[name]
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delete request.cache[name];
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return json
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}
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}
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var requestExtend = {
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formData: function(){
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if(this.opt.form){
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var data = F.parseForm(this.opt.form)
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F.merge(this.opt.data, data)
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}
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var form = new FormData()
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for(var i in this.opt.data){
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var el = this.opt.data[i]
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if(Array.isArray(el)){
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el.forEach(function(it){
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form.append(i + '[]', it)
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})
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}else{
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form.append(i, this.opt.data[i])
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}
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}
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return form
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},
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jsonp: function(jsonpcallback){
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win[jsonpcallback] = function(val){
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delete win[jsonpcallback]
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request.cache[jsonpcallback] = val
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}
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},
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dispatch: function(self){
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if(!this.transport)
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return
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var _this = this,
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result = {
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response: {
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url: this.opt.url,
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headers: {'content-type': ''}
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},
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request: {
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url: this.opt.url,
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headers: _this.opt.headers
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},
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status: self === null ? 504 : 200,
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statusText: self === null ? 'Connected timeout' : 'ok',
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text: '',
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body: '',
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error: null
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};
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//状态为4,既已成功, 则清除超时
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clearTimeout(_this.opt.timeoutID);
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if(typeof this.transport === 'object'
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&& this.opt.type === 'JSONP'){
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//移除script
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// this.transport.parentNode.removeChild(this.transport);
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//超时返回
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if(self !== null){
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var exec = !this.transport.readyState
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|| this.transport.readyState === 'loaded'
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|| this.transport.readyState === 'complete';
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if(exec){
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result.body = requestConvert.jsonp(this.opt.data.callback)
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result.text = JSON.stringify(result.body)
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}
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}
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this.callback(result.error, result)
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}else{
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//成功的回调
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var isSucc = self ? ((self.status >= 200 && self.status < 300) || self.status === 304) : false,
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headers = self && self.getAllResponseHeaders().split('\n') || [];
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//处理返回的Header
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headers.forEach(function(it, i){
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it = it.trim()
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if(it){
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it = it.split(':')
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result.response.headers[it.shift().toLowerCase()] = it.join(':').trim()
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}
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});
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if(isSucc){
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result.status = self.status
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if(result.status === 204){
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result.statusText = 'no content'
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}else if(result.status === 304){
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result.statusText = 'not modified'
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}
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}else{
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result.status = self === null ? 504 : (self.status || 500)
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result.statusText = self === null ? 'Connected timeout' : (self.statusText || 'Internal Server Error')
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result.error = F.merge(new Error(result.statusText), {status: result.status})
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}
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try{
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//处理返回的数据
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var dataType = result.response.headers['content-type'].match(/json|xml|script|html/i) || ['text']
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dataType = dataType[0].toLowerCase()
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result.text = self && (self.responseText || self.responseXML) || ''
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result.body = requestConvert[dataType](result.text, self && self.responseXML)
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}catch(err){
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result.error = err
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result.statusText = 'parse error'
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}
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_this.callback(result.error, result)
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}
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delete _this.transport;
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delete _this.opt
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delete _this.xhr
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}
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}
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// 设置表单类型, 支持2种, form/json
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_requestp.type = function(t){
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if(this.opt.formType === 'form-data')
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return this
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this.opt.formType = t || 'form'
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if(t === 'form' || this.opt.type === 'GET')
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this.set('content-type', 'application/x-www-form-urlencoded; charset=UTF-8')
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else
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this.set('content-type', 'application/json; charset=UTF-8')
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return this
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}
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//设置头信息
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_requestp.set = function(k, val){
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if(!this.transport)
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return
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if(typeof k === 'object'){
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for(var i in k){
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i = i.toLowerCase()
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this.opt.headers[i] = k[i]
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}
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}else if(typeof k === 'string'){
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if(arguments.length < 2)
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throw new Error('2 arguments required')
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// 全转小写,避免重复写入
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k = k.toLowerCase()
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if(val === undefined)
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delete this.opt.headers[k]
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else
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this.opt.headers[k] = val
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}else{
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throw new Error('arguments must be string/object, but [' + (typeof k) + '] given')
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}
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return this
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}
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//设置请求参数
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_requestp.send = function(k, val){
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if(!this.transport)
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return
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// 1. send方法可以多次调用, 但必须保证格式一致
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// 2. 2次圴提交纯字符串也会抛出异常
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if(typeof k === 'object'){
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if(this.opt.data && (typeof this.opt.data === 'string'))
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throw new Error('param can not be string and object at the same time')
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if(!this.opt.data)
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this.opt.data = {}
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F.merge(this.opt.data, k)
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}else{
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if(typeof k === 'string'){
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if(arguments.length === 1){
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if(this.opt.data)
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throw new Error('invalid param in function send')
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this.opt.data = k
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}else{
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if(this.opt.data && (typeof this.opt.data === 'string'))
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throw new Error('param can not be string and object at the same time')
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if(!this.opt.data)
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this.opt.data = {}
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this.opt.data[k] = val
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}
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}else{
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throw new Error('argument of send must be string/object, but [' + (typeof k) + '] given')
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}
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}
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return this
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}
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//该方法用于 form-data类型的post请求的参数设置
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_requestp.field = function(k, val){
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if(!this.transport)
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return
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// 此类型优先级最高
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this.opt.formType = 'form-data'
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if(!this.opt.data || (this.opt.data && typeof this.opt.data !== 'object'))
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this.opt.data = {}
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if(arguments.length === 1 && typeof k === 'object'){
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F.merge(this.opt.data, k)
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}else if(arguments.length === 2){
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this.opt.data[k] = val
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}else{
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throw new TypeError('argument must be an object, but ' + (typeof k) + ' given')
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}
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return this
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}
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//设置缓存
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_requestp.cache = function(t){
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if(!this.transport)
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return
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if(this.opt.type === 'GET')
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this.opt.cache = !!t
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return this
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}
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//取消网络请求
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_requestp.abort = function(){
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delete this.transport
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if(!this.opt.form)
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this.xhr.abort()
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return this
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}
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//超时设置, 单位毫秒
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_requestp.timeout = function(time){
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if(typeof time !== 'number' || time < 1)
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return this
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this.opt.timeout = time
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return this
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}
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_requestp.form = function(form){
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if(typeof form === 'object' && form.nodeName === 'FORM'){
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this.opt.type = 'POST'
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this.opt.form = form
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}
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return this
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}
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var originAnchor = doc.createElement('a');
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originAnchor.href = location.href;
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_requestp.end = function(callback){
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var _this = this;
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// 回调已执行, 或已取消, 则直接返回, 防止重复执行
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if(!this.transport)
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return
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if(!this.opt.url)
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throw new Error('Invalid request url')
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F.merge(this, requestExtend)
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this.callback = callback || noop
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// 1. url规范化
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this.opt.url = this.opt.url.replace(/#.*$/, '').replace(/^\/\//, location.protocol + '//')
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|
||
// 2. 处理跨域
|
||
if(typeof this.opt.crossDomain !== 'boolean'){
|
||
var anchor = doc.createElement('a')
|
||
try{
|
||
anchor.href = this.opt.url
|
||
// IE7及以下浏览器 '1'[0]的结果是 undefined
|
||
// IE7下需要获取绝对路径
|
||
var absUrl = !'1'[0] ? anchor.getAttribute('href', 4) : anchor.href
|
||
anchor.href = absUrl
|
||
anchor.async = true
|
||
this.opt.crossDomain = (originAnchor.protocol !== anchor.protocol) || (originAnchor.host !== anchor.host)
|
||
}catch(e){
|
||
this.opt.crossDomain = true
|
||
}
|
||
}
|
||
|
||
// 2.1 进一步处理跨域配置
|
||
if(this.opt.type === 'JSONP'){
|
||
//如果没有跨域，自动转回xhr GET
|
||
if(!this.opt.crossDomain){
|
||
this.opt.type = 'GET';
|
||
}else{
|
||
this.opt.data['callback'] = this.opt.data['callback'] || ('jsonp' + request.cid++);
|
||
this.jsonp(this.opt.data['callback']); //创建临时处理方法
|
||
}
|
||
}
|
||
// 2.2 如果不是跨域请求，则自动加上一条header信息，用以标识这是ajax请求
|
||
if(!this.opt.crossDomain){
|
||
this.set('X-Requested-With', 'XMLHttpRequest')
|
||
}
|
||
|
||
|
||
// 3. data转字符串
|
||
this.opt.param = F.param(this.opt.data)
|
||
|
||
|
||
// 4. 设置Content-Type类型, 默认x-www-form-urlencoded
|
||
if(!this.opt.formType)
|
||
this.type('form')
|
||
|
||
// 5.处理GET请求
|
||
this.opt.hasContent = this.opt.type === 'POST' //是否为post请求
|
||
if(!this.opt.hasContent){
|
||
|
||
//GET请求直接把参数拼接到url上
|
||
if(this.opt.param){
|
||
this.opt.url += (/\?/.test(this.opt.url) ? '&' : '?') + this.opt.param
|
||
}
|
||
//加随机值,避免缓存
|
||
if(this.opt.cache === false)
|
||
this.opt.url += (/\?/.test(this.opt.url) ? '&' : '?') + '_=' + Math.random()
|
||
}else{
|
||
if(this.opt.formType === 'form-data'){
|
||
delete this.opt.headers['content-type']
|
||
this.opt.param = this.formData()
|
||
|
||
}else if(this.opt.formType !== 'form'){
|
||
this.opt.param = JSON.stringify(this.opt.data)
|
||
}
|
||
}
|
||
|
||
//jsonp
|
||
if(this.opt.type === 'JSONP'){
|
||
|
||
this.transport = doc.createElement('script')
|
||
this.transport.onerror = this.transport.onload = function(){
|
||
_this.dispatch(_this.transport)
|
||
}
|
||
this.transport.src = this.opt.url
|
||
doc.head.insertBefore(this.transport, doc.head.firstChild)
|
||
|
||
//6. 超时处理
|
||
if(this.opt.timeout && this.opt.timeout > 0){
|
||
this.opt.timeoutID = setTimeout(function(){
|
||
_this.transport.onerror = _this.transport.onload = null
|
||
_this.dispatch(null)
|
||
}, this.opt.timeout)
|
||
}
|
||
}else{
|
||
|
||
this.xhr.onreadystatechange = function(ev){
|
||
|
||
if(_this.opt.timeout && _this.opt.timeout > 0){
|
||
_this.opt['time' + this.readyState] = ev.timeStamp
|
||
if(this.readyState === 4){
|
||
_this.opt.isTimeout = _this.opt.time4 - _this.opt.time1 > _this.opt.timeout
|
||
}
|
||
}
|
||
|
||
if(this.readyState !== 4){
|
||
return
|
||
}
|
||
|
||
_this.dispatch(_this.opt.isTimeout ? null : _this.xhr)
|
||
|
||
}
|
||
|
||
|
||
// 6. 初始化xhr提交
|
||
this.xhr.open(this.opt.type, this.opt.url, true)
|
||
|
||
// 7. 设置头信息
|
||
for(var i in this.opt.headers){
|
||
if(this.opt.headers[i])
|
||
this.xhr.setRequestHeader(i, this.opt.headers[i])
|
||
}
|
||
|
||
// 8. 发起网络请求
|
||
_this.xhr.send(_this.opt.param)
|
||
|
||
//超时处理
|
||
if(this.opt.timeout && this.opt.timeout > 0){
|
||
this.xhr.timeout = this.opt.timeout;
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
// ---------------------- end ------------------------
|
||
|
||
|
||
if(!win.request){
|
||
win.request = {
|
||
get: function(url){
|
||
if(!url)
|
||
throw new Error('argument url is required')
|
||
|
||
return new _request(url, 'GET')
|
||
},
|
||
post: function(url){
|
||
if(!url)
|
||
throw new Error('argument url is required')
|
||
|
||
return new _request(url, 'POST')
|
||
},
|
||
jsonp: function(url){
|
||
if(!url)
|
||
throw new Error('argument url is required')
|
||
|
||
return new _request(url, 'JSONP')
|
||
},
|
||
cache: {},
|
||
cid: 0,
|
||
version: '1.0.0',
|
||
release: 'request ES5 version/1.0.0'
|
||
}
|
||
}
|
||
|
||
return request
|
||
})
|
JavaScript
95.2%
CSS
4.8%