680 lines
21 KiB
JavaScript
680 lines
21 KiB
JavaScript
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/**
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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(['yua'], function(yua){
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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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data: {},
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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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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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var Format = function(){}
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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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return yua.parseHTML(html)
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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){
|
|||
|
|
|
|||
|
|
if(!this.transport)
|
|||
|
|
return
|
|||
|
|
|
|||
|
|
// 1. send方法可以多次调用, 但必须保证格式一致
|
|||
|
|
// 2. 2次圴提交纯字符串也会抛出异常
|
|||
|
|
if(typeof k === 'object'){
|
|||
|
|
if(this.opt.data && (typeof this.opt.data === 'string'))
|
|||
|
|
throw new Error('param can not be string and object at the same time')
|
|||
|
|
if(!this.opt.data)
|
|||
|
|
this.opt.data = {}
|
|||
|
|
|
|||
|
|
F.merge(this.opt.data, k)
|
|||
|
|
}else{
|
|||
|
|
if(typeof k === 'string'){
|
|||
|
|
if(arguments.length === 1){
|
|||
|
|
if(this.opt.data)
|
|||
|
|
throw new Error('invalid param in function send')
|
|||
|
|
|
|||
|
|
this.opt.data = k
|
|||
|
|
}else{
|
|||
|
|
if(this.opt.data && (typeof this.opt.data === 'string'))
|
|||
|
|
throw new Error('param can not be string and object at the same time')
|
|||
|
|
|
|||
|
|
if(!this.opt.data)
|
|||
|
|
this.opt.data = {}
|
|||
|
|
|
|||
|
|
this.opt.data[k] = val
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
}else{
|
|||
|
|
throw new Error('argument of send must be string/object, but [' + (typeof k) + '] given')
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return this
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//该方法用于 form-data类型的post请求的参数设置
|
|||
|
|
_requestp.field = function(k, val){
|
|||
|
|
|
|||
|
|
if(!this.transport)
|
|||
|
|
return
|
|||
|
|
|
|||
|
|
// 此类型优先级最高
|
|||
|
|
this.opt.formType = 'form-data'
|
|||
|
|
if(!this.opt.data || (this.opt.data && typeof this.opt.data !== 'object'))
|
|||
|
|
this.opt.data = {}
|
|||
|
|
|
|||
|
|
if(arguments.length === 1 && typeof k === 'object'){
|
|||
|
|
F.merge(this.opt.data, k)
|
|||
|
|
}else if(arguments.length === 2){
|
|||
|
|
this.opt.data[k] = val
|
|||
|
|
}else{
|
|||
|
|
throw new TypeError('argument must be an object, but ' + (typeof k) + ' given')
|
|||
|
|
}
|
|||
|
|
return this
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
//设置缓存
|
|||
|
|
_requestp.cache = function(t){
|
|||
|
|
if(!this.transport)
|
|||
|
|
return
|
|||
|
|
|
|||
|
|
if(this.opt.type === 'GET')
|
|||
|
|
this.opt.cache = !!t
|
|||
|
|
|
|||
|
|
return this
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
//取消网络请求
|
|||
|
|
_requestp.abort = function(){
|
|||
|
|
delete this.transport
|
|||
|
|
if(!this.opt.form)
|
|||
|
|
this.xhr.abort()
|
|||
|
|
|
|||
|
|
return this
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//超时设置, 单位毫秒
|
|||
|
|
_requestp.timeout = function(time){
|
|||
|
|
if(typeof time !== 'number' || time < 1)
|
|||
|
|
return this
|
|||
|
|
|
|||
|
|
this.opt.timeout = time
|
|||
|
|
return this
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
_requestp.form = function(form){
|
|||
|
|
if(typeof form === 'object' && form.nodeName === 'FORM'){
|
|||
|
|
this.opt.type = 'POST'
|
|||
|
|
this.opt.form = form
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return this
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
var originAnchor = doc.createElement('a');
|
|||
|
|
originAnchor.href = location.href;
|
|||
|
|
_requestp.end = function(callback){
|
|||
|
|
var _this = this;
|
|||
|
|
// 回调已执行, 或已取消, 则直接返回, 防止重复执行
|
|||
|
|
if(!this.transport)
|
|||
|
|
return
|
|||
|
|
|
|||
|
|
if(!this.opt.url)
|
|||
|
|
throw new Error('Invalid request url')
|
|||
|
|
|
|||
|
|
F.merge(this, requestExtend)
|
|||
|
|
|
|||
|
|
this.callback = callback || noop
|
|||
|
|
|
|||
|
|
// 1. url规范化
|
|||
|
|
this.opt.url = this.opt.url.replace(/#.*$/, '').replace(/^\/\//, location.protocol + '//')
|
|||
|
|
|
|||
|
|
|
|||
|
|
// 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')
|
|||
|
|
}else{
|
|||
|
|
supportCors && (this.xhr.withCredentials = true)
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
// 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: '0.0.1-es5',
|
|||
|
|
}
|
|||
|
|
yua.ui.request = '0.0.1-es5'
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return request
|
|||
|
|
})
|